wip

Do not remove the item from pane twice (#30254 )
Probably a merge artifact? Release Notes: - N/A
2025-05-19 15:55:30 -04:00 · 2025-05-08 13:30:20 +00:00 · 2025-05-08 09:10:50 -04:00 · 2025-05-08 13:09:29 +00:00 · 2025-05-08 14:39:56 +02:00 · 2025-05-08 12:38:19 +00:00
348 changed files with 17131 additions and 37616 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -162,13 +162,23 @@ jobs:
        working-directory: ./docs
        run: |
          pnpm dlx prettier@${PRETTIER_VERSION} . --check || {
-            echo "To fix, run from the root of the zed repo:"
+            echo "To fix, run from the root of the Zed repo:"
            echo "  cd docs && pnpm dlx prettier@${PRETTIER_VERSION} . --write && cd .."
            false
          }
        env:
          PRETTIER_VERSION: 3.5.0

+      - name: Prettier Check on default.json
+        run: |
+          pnpm dlx prettier@${PRETTIER_VERSION} assets/settings/default.json --check || {
+            echo "To fix, run from the root of the Zed repo:"
+            echo "  pnpm dlx prettier@${PRETTIER_VERSION} assets/settings/default.json --write"
+            false
+          }
+        env:
+          PRETTIER_VERSION: 3.5.0
+
      # To support writing comments that they will certainly be revisited.
      - name: Check for todo! and FIXME comments
        run: script/check-todos
--- a/.prettierrc
+++ b/.prettierrc
@@ -0,0 +1,3 @@
+{
+  "printWidth": 120
+}
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -56,13 +56,13 @@ dependencies = [
 "assistant_context_editor",
 "assistant_settings",
 "assistant_slash_command",
+ "assistant_slash_commands",
 "assistant_tool",
 "async-watch",
 "buffer_diff",
 "chrono",
 "client",
 "collections",
- "command_palette_hooks",
 "component",
 "context_server",
 "convert_case 0.8.0",
@@ -79,6 +79,7 @@ dependencies = [
 "heed",
 "html_to_markdown",
 "http_client",
+ "indexed_docs",
 "indoc",
 "itertools 0.14.0",
 "jsonschema",
@@ -125,6 +126,7 @@ dependencies = [
 "time_format",
 "ui",
 "ui_input",
+ "urlencoding",
 "util",
 "uuid",
 "workspace",
@@ -470,68 +472,6 @@ dependencies = [
 "workspace-hack",
 ]

-[[package]]
-name = "assistant"
-version = "0.1.0"
-dependencies = [
- "anyhow",
- "assistant_context_editor",
- "assistant_settings",
- "assistant_slash_command",
- "assistant_slash_commands",
- "assistant_tool",
- "async-watch",
- "client",
- "collections",
- "command_palette_hooks",
- "ctor",
- "db",
- "editor",
- "env_logger 0.11.8",
- "feature_flags",
- "fs",
- "futures 0.3.31",
- "gpui",
- "indexed_docs",
- "indoc",
- "language",
- "language_model",
- "language_model_selector",
- "languages",
- "log",
- "lsp",
- "menu",
- "multi_buffer",
- "parking_lot",
- "pretty_assertions",
- "project",
- "prompt_store",
- "proto",
- "rand 0.8.5",
- "rope",
- "rules_library",
- "schemars",
- "search",
- "serde",
- "serde_json_lenient",
- "settings",
- "smol",
- "streaming_diff",
- "telemetry",
- "telemetry_events",
- "terminal",
- "terminal_view",
- "text",
- "theme",
- "tree-sitter-md",
- "ui",
- "unindent",
- "util",
- "workspace",
- "workspace-hack",
- "zed_actions",
-]
-
 [[package]]
 name = "assistant_context_editor"
 version = "0.1.0"
@@ -546,7 +486,6 @@ dependencies = [
 "collections",
 "context_server",
 "editor",
- "feature_flags",
 "fs",
 "futures 0.3.31",
 "fuzzy",
@@ -594,8 +533,8 @@ version = "0.1.0"
 dependencies = [
 "anthropic",
 "anyhow",
+ "collections",
 "deepseek",
- "feature_flags",
 "fs",
 "gpui",
 "indexmap",
@@ -607,9 +546,11 @@ dependencies = [
 "paths",
 "schemars",
 "serde",
+ "serde_json",
 "serde_json_lenient",
 "settings",
 "workspace-hack",
+ "zed_llm_client",
 ]

 [[package]]
@@ -3001,8 +2942,8 @@ name = "collab"
 version = "0.44.0"
 dependencies = [
 "anyhow",
- "assistant",
 "assistant_context_editor",
+ "assistant_settings",
 "assistant_slash_command",
 "assistant_tool",
 "async-stripe",
@@ -3236,6 +3177,7 @@ dependencies = [
 "gpui",
 "linkme",
 "parking_lot",
+ "strum 0.27.1",
 "theme",
 "workspace-hack",
 ]
@@ -3251,6 +3193,7 @@ dependencies = [
 "collections",
 "component",
 "db",
+ "futures 0.3.31",
 "gpui",
 "languages",
 "log",
@@ -3260,6 +3203,7 @@ dependencies = [
 "serde",
 "ui",
 "ui_input",
+ "util",
 "workspace",
 "workspace-hack",
 ]
@@ -4063,7 +4007,6 @@ dependencies = [
 "http_client",
 "language",
 "log",
- "lsp-types",
 "node_runtime",
 "parking_lot",
 "paths",
@@ -4096,9 +4039,9 @@ dependencies = [
 "anyhow",
 "async-trait",
 "dap",
+ "futures 0.3.31",
 "gpui",
 "language",
- "lsp-types",
 "paths",
 "serde",
 "serde_json",
@@ -4243,6 +4186,7 @@ dependencies = [
 "collections",
 "command_palette_hooks",
 "dap",
+ "dap_adapters",
 "db",
 "debugger_tools",
 "editor",
@@ -7293,6 +7237,7 @@ dependencies = [
 "lsp",
 "paths",
 "project",
+ "proto",
 "regex",
 "serde_json",
 "settings",
@@ -7300,6 +7245,7 @@ dependencies = [
 "telemetry",
 "theme",
 "ui",
+ "util",
 "workspace",
 "workspace-hack",
 "zed_actions",
@@ -7789,6 +7735,7 @@ dependencies = [
 "tree-sitter-html",
 "tree-sitter-json",
 "tree-sitter-md",
+ "tree-sitter-python",
 "tree-sitter-ruby",
 "tree-sitter-rust",
 "tree-sitter-typescript",
@@ -7896,6 +7843,7 @@ dependencies = [
 "partial-json-fixer",
 "project",
 "proto",
+ "release_channel",
 "schemars",
 "serde",
 "serde_json",
@@ -14740,6 +14688,7 @@ dependencies = [
 "log",
 "project",
 "rand 0.8.5",
+ "regex",
 "schemars",
 "search",
 "serde",
@@ -15076,7 +15025,6 @@ dependencies = [
 "client",
 "collections",
 "db",
- "feature_flags",
 "gpui",
 "http_client",
 "notifications",
@@ -18149,6 +18097,7 @@ dependencies = [
 "itertools 0.14.0",
 "language",
 "log",
+ "menu",
 "node_runtime",
 "parking_lot",
 "postage",
@@ -18684,7 +18633,7 @@ dependencies = [

 [[package]]
 name = "zed"
-version = "0.186.0"
+version = "0.187.0"
 dependencies = [
 "activity_indicator",
 "agent",
@@ -18692,7 +18641,6 @@ dependencies = [
 "ashpd",
 "askpass",
 "assets",
- "assistant",
 "assistant_context_editor",
 "assistant_settings",
 "assistant_tools",
@@ -18874,9 +18822,9 @@ dependencies = [

 [[package]]
 name = "zed_llm_client"
-version = "0.7.4"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2adf9bc80def4ec93c190f06eb78111865edc2576019a9753eaef6fd7bc3b72c"
+checksum = "a23b2fd00776b0c55072f389654910ceb501eb0083d7f78905ab0e5cc86949ec"
 dependencies = [
 "anyhow",
 "serde",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,6 @@ members = [
    "crates/anthropic",
    "crates/askpass",
    "crates/assets",
-    "crates/assistant",
    "crates/assistant_context_editor",
    "crates/assistant_settings",
    "crates/assistant_slash_command",
@@ -214,7 +213,6 @@ ai = { path = "crates/ai" }
 anthropic = { path = "crates/anthropic" }
 askpass = { path = "crates/askpass" }
 assets = { path = "crates/assets" }
-assistant = { path = "crates/assistant" }
 assistant_context_editor = { path = "crates/assistant_context_editor" }
 assistant_settings = { path = "crates/assistant_settings" }
 assistant_slash_command = { path = "crates/assistant_slash_command" }
@@ -610,7 +608,7 @@ wasmtime-wasi = "29"
 which = "6.0.0"
 wit-component = "0.221"
 workspace-hack = "0.1.0"
-zed_llm_client = "0.7.4"
+zed_llm_client = "0.8.0"
 zstd = "0.11"

 [workspace.dependencies.async-stripe]
--- a/assets/icons/debug_disconnect.svg
+++ b/assets/icons/debug_disconnect.svg
--- a/assets/icons/document_text.svg
+++ b/assets/icons/document_text.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="size-5">
+  <path fill-rule="evenodd" d="M4.5 2A1.5 1.5 0 0 0 3 3.5v13A1.5 1.5 0 0 0 4.5 18h11a1.5 1.5 0 0 0 1.5-1.5V7.621a1.5 1.5 0 0 0-.44-1.06l-4.12-4.122A1.5 1.5 0 0 0 11.378 2H4.5Zm2.25 8.5a.75.75 0 0 0 0 1.5h6.5a.75.75 0 0 0 0-1.5h-6.5Zm0 3a.75.75 0 0 0 0 1.5h6.5a.75.75 0 0 0 0-1.5h-6.5Z" clip-rule="evenodd" />
+</svg>
--- a/assets/icons/thumbs_down.svg
+++ b/assets/icons/thumbs_down.svg
@@ -1 +1,3 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-thumbs-down"><path d="M17 14V2"/><path d="M9 18.12 10 14H4.17a2 2 0 0 1-1.92-2.56l2.33-8A2 2 0 0 1 6.5 2H20a2 2 0 0 1 2 2v8a2 2 0 0 1-2 2h-2.76a2 2 0 0 0-1.79 1.11L12 22a3.13 3.13 0 0 1-3-3.88Z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="size-5">
+  <path d="M18.905 12.75a1.25 1.25 0 1 1-2.5 0v-7.5a1.25 1.25 0 0 1 2.5 0v7.5ZM8.905 17v1.3c0 .268-.14.526-.395.607A2 2 0 0 1 5.905 17c0-.995.182-1.948.514-2.826.204-.54-.166-1.174-.744-1.174h-2.52c-1.243 0-2.261-1.01-2.146-2.247.193-2.08.651-4.082 1.341-5.974C2.752 3.678 3.833 3 5.005 3h3.192a3 3 0 0 1 1.341.317l2.734 1.366A3 3 0 0 0 13.613 5h1.292v7h-.963c-.685 0-1.258.482-1.612 1.068a4.01 4.01 0 0 1-2.166 1.73c-.432.143-.853.386-1.011.814-.16.432-.248.9-.248 1.388Z" />
+</svg>
--- a/assets/icons/thumbs_up.svg
+++ b/assets/icons/thumbs_up.svg
@@ -1 +1,3 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-thumbs-up"><path d="M7 10v12"/><path d="M15 5.88 14 10h5.83a2 2 0 0 1 1.92 2.56l-2.33 8A2 2 0 0 1 17.5 22H4a2 2 0 0 1-2-2v-8a2 2 0 0 1 2-2h2.76a2 2 0 0 0 1.79-1.11L12 2a3.13 3.13 0 0 1 3 3.88Z"/></svg>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" class="size-5">
+  <path d="M1 8.25a1.25 1.25 0 1 1 2.5 0v7.5a1.25 1.25 0 1 1-2.5 0v-7.5ZM11 3V1.7c0-.268.14-.526.395-.607A2 2 0 0 1 14 3c0 .995-.182 1.948-.514 2.826-.204.54.166 1.174.744 1.174h2.52c1.243 0 2.261 1.01 2.146 2.247a23.864 23.864 0 0 1-1.341 5.974C17.153 16.323 16.072 17 14.9 17h-3.192a3 3 0 0 1-1.341-.317l-2.734-1.366A3 3 0 0 0 6.292 15H5V8h.963c.685 0 1.258-.483 1.612-1.068a4.011 4.011 0 0 1 2.166-1.73c.432-.143.853-.386 1.011-.814.16-.432.248-.9.248-1.388Z" />
+</svg>
--- a/assets/images/ai_grid.svg
+++ b/assets/images/ai_grid.svg
@@ -0,0 +1,334 @@
+<svg width="400" height="92" viewBox="0 0 400 92" fill="none" xmlns="http://www.w3.org/2000/svg">
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+</clipPath>
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+</clipPath>
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+<rect width="16" height="16" fill="white" transform="translate(288.465 27.9891) rotate(2.5)"/>
+</clipPath>
+</defs>
+</svg>
--- a/assets/images/grid.svg
+++ b/assets/images/grid.svg
@@ -0,0 +1,153 @@
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--- a/assets/keymaps/default-linux.json
+++ b/assets/keymaps/default-linux.json
@@ -213,21 +213,6 @@
      "ctrl-shift-n": "agent::RejectAll"
    }
  },
-  {
-    "context": "AssistantPanel",
-    "bindings": {
-      "ctrl-k c": "assistant::CopyCode",
-      "ctrl-shift-e": "project_panel::ToggleFocus",
-      "ctrl-g": "search::SelectNextMatch",
-      "ctrl-shift-g": "search::SelectPreviousMatch",
-      "ctrl-alt-/": "assistant::ToggleModelSelector",
-      "ctrl-k h": "assistant::DeployHistory",
-      "ctrl-k l": "assistant::OpenRulesLibrary",
-      "new": "assistant::NewChat",
-      "ctrl-t": "assistant::NewChat",
-      "ctrl-n": "assistant::NewChat"
-    }
-  },
  {
    "context": "ContextEditor > Editor",
    "bindings": {
@@ -237,11 +222,14 @@
      "save": "workspace::Save",
      "ctrl->": "assistant::QuoteSelection",
      "ctrl-<": "assistant::InsertIntoEditor",
-      "ctrl-alt-/": "assistant::ToggleModelSelector",
      "shift-enter": "assistant::Split",
      "ctrl-r": "assistant::CycleMessageRole",
      "enter": "assistant::ConfirmCommand",
-      "alt-enter": "editor::Newline"
+      "alt-enter": "editor::Newline",
+      "ctrl-k c": "assistant::CopyCode",
+      "ctrl-g": "search::SelectNextMatch",
+      "ctrl-shift-g": "search::SelectPreviousMatch",
+      "ctrl-k l": "agent::OpenRulesLibrary"
    }
  },
  {
@@ -251,14 +239,15 @@
      "ctrl-alt-n": "agent::NewTextThread",
      "ctrl-shift-h": "agent::OpenHistory",
      "ctrl-alt-c": "agent::OpenConfiguration",
-      "ctrl-alt-p": "assistant::OpenRulesLibrary",
+      "ctrl-alt-p": "agent::OpenRulesLibrary",
      "ctrl-i": "agent::ToggleProfileSelector",
-      "ctrl-alt-/": "assistant::ToggleModelSelector",
+      "ctrl-alt-/": "agent::ToggleModelSelector",
      "ctrl-shift-a": "agent::ToggleContextPicker",
      "ctrl-shift-o": "agent::ToggleNavigationMenu",
      "ctrl-shift-i": "agent::ToggleOptionsMenu",
      "shift-escape": "agent::ExpandMessageEditor",
-      "ctrl-alt-e": "agent::RemoveAllContext"
+      "ctrl-alt-e": "agent::RemoveAllContext",
+      "ctrl-shift-e": "project_panel::ToggleFocus"
    }
  },
  {
@@ -568,7 +557,7 @@
      "ctrl-shift-e": "project_panel::ToggleFocus",
      "ctrl-shift-b": "outline_panel::ToggleFocus",
      "ctrl-shift-g": "git_panel::ToggleFocus",
-      "ctrl-?": "assistant::ToggleFocus",
+      "ctrl-?": "agent::ToggleFocus",
      "alt-save": "workspace::SaveAll",
      "ctrl-alt-s": "workspace::SaveAll",
      "ctrl-k m": "language_selector::Toggle",
@@ -709,8 +698,8 @@
  {
    "context": "PromptEditor",
    "bindings": {
-      "ctrl-[": "assistant::CyclePreviousInlineAssist",
-      "ctrl-]": "assistant::CycleNextInlineAssist",
+      "ctrl-[": "agent::CyclePreviousInlineAssist",
+      "ctrl-]": "agent::CycleNextInlineAssist",
      "ctrl-alt-e": "agent::RemoveAllContext"
    }
  },
--- a/assets/keymaps/default-macos.json
+++ b/assets/keymaps/default-macos.json
@@ -258,21 +258,6 @@
      "shift-ctrl-r": "agent::OpenAgentDiff"
    }
  },
-  {
-    "context": "AssistantPanel",
-    "use_key_equivalents": true,
-    "bindings": {
-      "cmd-k c": "assistant::CopyCode",
-      "cmd-shift-e": "project_panel::ToggleFocus",
-      "cmd-g": "search::SelectNextMatch",
-      "cmd-shift-g": "search::SelectPreviousMatch",
-      "cmd-alt-/": "assistant::ToggleModelSelector",
-      "cmd-k h": "assistant::DeployHistory",
-      "cmd-k l": "assistant::OpenRulesLibrary",
-      "cmd-t": "assistant::NewChat",
-      "cmd-n": "assistant::NewChat"
-    }
-  },
  {
    "context": "ContextEditor > Editor",
    "use_key_equivalents": true,
@@ -282,11 +267,14 @@
      "cmd-s": "workspace::Save",
      "cmd->": "assistant::QuoteSelection",
      "cmd-<": "assistant::InsertIntoEditor",
-      "cmd-alt-/": "assistant::ToggleModelSelector",
      "shift-enter": "assistant::Split",
      "ctrl-r": "assistant::CycleMessageRole",
      "enter": "assistant::ConfirmCommand",
-      "alt-enter": "editor::Newline"
+      "alt-enter": "editor::Newline",
+      "cmd-k c": "assistant::CopyCode",
+      "cmd-g": "search::SelectNextMatch",
+      "cmd-shift-g": "search::SelectPreviousMatch",
+      "cmd-k l": "agent::OpenRulesLibrary"
    }
  },
  {
@@ -297,14 +285,15 @@
      "cmd-alt-n": "agent::NewTextThread",
      "cmd-shift-h": "agent::OpenHistory",
      "cmd-alt-c": "agent::OpenConfiguration",
-      "cmd-alt-p": "assistant::OpenRulesLibrary",
+      "cmd-alt-p": "agent::OpenRulesLibrary",
      "cmd-i": "agent::ToggleProfileSelector",
-      "cmd-alt-/": "assistant::ToggleModelSelector",
+      "cmd-alt-/": "agent::ToggleModelSelector",
      "cmd-shift-a": "agent::ToggleContextPicker",
      "cmd-shift-o": "agent::ToggleNavigationMenu",
      "cmd-shift-i": "agent::ToggleOptionsMenu",
      "shift-escape": "agent::ExpandMessageEditor",
-      "cmd-alt-e": "agent::RemoveAllContext"
+      "cmd-alt-e": "agent::RemoveAllContext",
+      "cmd-shift-e": "project_panel::ToggleFocus"
    }
  },
  {
@@ -635,7 +624,7 @@
      "cmd-shift-e": "project_panel::ToggleFocus",
      "cmd-shift-b": "outline_panel::ToggleFocus",
      "ctrl-shift-g": "git_panel::ToggleFocus",
-      "cmd-?": "assistant::ToggleFocus",
+      "cmd-?": "agent::ToggleFocus",
      "cmd-alt-s": "workspace::SaveAll",
      "cmd-k m": "language_selector::Toggle",
      "escape": "workspace::Unfollow",
@@ -774,10 +763,10 @@
    "use_key_equivalents": true,
    "bindings": {
      "cmd-shift-a": "agent::ToggleContextPicker",
-      "cmd-alt-/": "assistant::ToggleModelSelector",
+      "cmd-alt-/": "agent::ToggleModelSelector",
      "cmd-alt-e": "agent::RemoveAllContext",
-      "ctrl-[": "assistant::CyclePreviousInlineAssist",
-      "ctrl-]": "assistant::CycleNextInlineAssist"
+      "ctrl-[": "agent::CyclePreviousInlineAssist",
+      "ctrl-]": "agent::CycleNextInlineAssist"
    }
  },
  {
--- a/assets/settings/default.json
+++ b/assets/settings/default.json
@@ -67,6 +67,8 @@
  "ui_font_weight": 400,
  // The default font size for text in the UI
  "ui_font_size": 16,
+  // The default font size for text in the agent panel
+  "agent_font_size": 16,
  // How much to fade out unused code.
  "unnecessary_code_fade": 0.3,
  // Active pane styling settings.
@@ -305,6 +307,15 @@
    // Whether to show agent review buttons in the editor toolbar.
    "agent_review": true
  },
+  // Titlebar related settings
+  "title_bar": {
+    // Whether to show the branch icon beside branch switcher in the titlebar.
+    "show_branch_icon": false,
+    // Whether to show onboarding banners in the titlebar.
+    "show_onboarding_banner": true,
+    // Whether to show user picture in the titlebar.
+    "show_user_picture": true
+  },
  // Scrollbar related settings
  "scrollbar": {
    // When to show the scrollbar in the editor.
@@ -345,6 +356,49 @@
      "vertical": true
    }
  },
+  // Minimap related settings
+  "minimap": {
+    // When to show the minimap in the editor.
+    // This setting can take three values:
+    // 1. Show the minimap if the editor's scrollbar is visible:
+    //    "auto"
+    // 2. Always show the minimap:
+    //    "always"
+    // 3. Never show the minimap:
+    //    "never" (default)
+    "show": "never",
+    // When to show the minimap thumb.
+    // This setting can take two values:
+    // 1. Show the minimap thumb if the mouse is over the minimap:
+    //    "hover"
+    // 2. Always show the minimap thumb:
+    //    "always" (default)
+    "thumb": "always",
+    // How the minimap thumb border should look.
+    // This setting can take five values:
+    // 1. Display a border on all sides of the thumb:
+    //    "thumb_border": "full"
+    // 2. Display a border on all sides except the left side of the thumb:
+    //    "thumb_border": "left_open" (default)
+    // 3. Display a border on all sides except the right side of the thumb:
+    //    "thumb_border": "right_open"
+    // 4. Display a border only on the left side of the thumb:
+    //    "thumb_border": "left_only"
+    // 5. Display the thumb without any border:
+    //    "thumb_border": "none"
+    "thumb_border": "left_open",
+    // How to highlight the current line in the minimap.
+    // This setting can take the following values:
+    //
+    // 1. `null` to inherit the editor `current_line_highlight` setting (default)
+    // 2. "line" or "all" to highlight the current line in the minimap.
+    // 3. "gutter" or "none" to not highlight the current line in the minimap.
+    "current_line_highlight": null,
+    // The width of the minimap in pixels.
+    "width": 100,
+    // The font size of the minimap in pixels.
+    "font_size": 2
+  },
  // Enable middle-click paste on Linux.
  "middle_click_paste": true,
  // What to do when multibuffer is double clicked in some of its excerpts
@@ -359,8 +413,6 @@
  "gutter": {
    // Whether to show line numbers in the gutter.
    "line_numbers": true,
-    // Whether to show code action buttons in the gutter.
-    "code_actions": true,
    // Whether to show runnables buttons in the gutter.
    "runnables": true,
    // Whether to show breakpoints in the gutter.
@@ -603,13 +655,11 @@
    //
    // Default: main
    "fallback_branch_name": "main",
-
    // Whether to sort entries in the panel by path
    // or by status (the default).
    //
    // Default: false
    "sort_by_path": false,
-
    "scrollbar": {
      // When to show the scrollbar in the git panel.
      //
@@ -630,33 +680,57 @@
    // Default width of the notification panel.
    "default_width": 380
  },
-  "assistant": {
+  "agent": {
    // Version of this setting.
    "version": "2",
-    // Whether the assistant is enabled.
+    // Whether the agent is enabled.
    "enabled": true,
-    // Whether to show the assistant panel button in the status bar.
+    /// What completion mode to start new threads in, if available. Can be 'normal' or 'max'.
+    "preferred_completion_mode": "normal",
+    // Whether to show the agent panel button in the status bar.
    "button": true,
-    // Where to dock the assistant panel. Can be 'left', 'right' or 'bottom'.
+    // Where to dock the agent panel. Can be 'left', 'right' or 'bottom'.
    "dock": "right",
-    // Default width when the assistant is docked to the left or right.
+    // Default width when the agent panel is docked to the left or right.
    "default_width": 640,
-    // Default height when the assistant is docked to the bottom.
+    // Default height when the agent panel is docked to the bottom.
    "default_height": 320,
-    // The default model to use when creating new chats.
+    // The default model to use when creating new threads.
    "default_model": {
      // The provider to use.
      "provider": "zed.dev",
      // The model to use.
      "model": "claude-3-7-sonnet-latest"
    },
-    // The model to use when applying edits from the assistant.
+    // The model to use when applying edits from the agent.
    "editor_model": {
      // The provider to use.
      "provider": "zed.dev",
      // The model to use.
      "model": "claude-3-7-sonnet-latest"
    },
+    // Additional parameters for language model requests. When making a request to a model, parameters will be taken
+    // from the last entry in this list that matches the model's provider and name. In each entry, both provider
+    // and model are optional, so that you can specify parameters for either one.
+    "model_parameters": [
+      // To set parameters for all requests to OpenAI models:
+      // {
+      //   "provider": "openai",
+      //   "temperature": 0.5
+      // }
+      //
+      // To set parameters for all requests in general:
+      // {
+      //   "temperature": 0
+      // }
+      //
+      // To set parameters for a specific provider and model:
+      // {
+      //   "provider": "zed.dev",
+      //   "model": "claude-3-7-sonnet-latest",
+      //   "temperature": 1.0
+      // }
+    ],
    // When enabled, the agent can run potentially destructive actions without asking for your confirmation.
    "always_allow_tool_actions": false,
    // When enabled, the agent will stream edits.
@@ -711,7 +785,7 @@
        "tools": {}
      }
    },
-    // Where to show notifications when an agent has either completed
+    // Where to show notifications when the agent has either completed
    // its response, or else needs confirmation before it can run a
    // tool action.
    // "primary_screen" - Show the notification only on your primary screen (default)
@@ -901,6 +975,8 @@
  "hard_tabs": false,
  // How many columns a tab should occupy.
  "tab_size": 4,
+  // What debuggers are preferred by default for all languages.
+  "debuggers": [],
  // Control what info is collected by Zed.
  "telemetry": {
    // Send debug info like crash reports.
@@ -1016,9 +1092,9 @@
    // 2. Display predictions inline only when holding a modifier key (alt by default).
    //     "mode": "subtle"
    "mode": "eager",
-    // Whether edit predictions are enabled in the assistant panel.
+    // Whether edit predictions are enabled when editing text threads.
    // This setting has no effect if globally disabled.
-    "enabled_in_assistant": true
+    "enabled_in_text_threads": true
  },
  // Settings specific to journaling
  "journal": {
@@ -1320,6 +1396,9 @@
    "Elixir": {
      "language_servers": ["elixir-ls", "!next-ls", "!lexical", "..."]
    },
+    "Elm": {
+      "tab_size": 4
+    },
    "Erlang": {
      "language_servers": ["erlang-ls", "!elp", "..."]
    },
@@ -1594,8 +1673,6 @@
  //   "W": "workspace::Save"
  // }
  "command_aliases": {},
-  // Whether to show user picture in titlebar.
-  "show_user_picture": true,
  // ssh_connections is an array of ssh connections.
  // You can configure these from `project: Open Remote` in the command palette.
  // Zed's ssh support will pull configuration from your ~/.ssh too.
@@ -1612,7 +1689,7 @@
  //   }
  // ]
  "ssh_connections": [],
-  // Configures context servers for use in the Assistant.
+  // Configures context servers for use by the agent.
  "context_servers": {},
  "debugger": {
    "stepping_granularity": "line",
--- a/crates/activity_indicator/src/activity_indicator.rs
+++ b/crates/activity_indicator/src/activity_indicator.rs
@@ -43,6 +43,7 @@ pub struct ActivityIndicator {
    context_menu_handle: PopoverMenuHandle<ContextMenu>,
 }

+#[derive(Debug)]
 struct ServerStatus {
    name: SharedString,
    status: BinaryStatus,
@@ -70,6 +71,7 @@ impl ActivityIndicator {
    ) -> Entity<ActivityIndicator> {
        let project = workspace.project().clone();
        let auto_updater = AutoUpdater::get(cx);
+        let workspace_handle = cx.entity();
        let this = cx.new(|cx| {
            let mut status_events = languages.language_server_binary_statuses();
            cx.spawn(async move |this, cx| {
@@ -84,17 +86,23 @@ impl ActivityIndicator {
            })
            .detach();

-            let mut status_events = languages.dap_server_binary_statuses();
-            cx.spawn(async move |this, cx| {
-                while let Some((name, status)) = status_events.next().await {
-                    this.update(cx, |this, cx| {
-                        this.statuses.retain(|s| s.name != name);
-                        this.statuses.push(ServerStatus { name, status });
-                        cx.notify();
-                    })?;
-                }
-                anyhow::Ok(())
-            })
+            cx.subscribe_in(
+                &workspace_handle,
+                window,
+                |activity_indicator, _, event, window, cx| match event {
+                    workspace::Event::ClearActivityIndicator { .. } => {
+                        if activity_indicator.statuses.pop().is_some() {
+                            activity_indicator.dismiss_error_message(
+                                &DismissErrorMessage,
+                                window,
+                                cx,
+                            );
+                            cx.notify();
+                        }
+                    }
+                    _ => {}
+                },
+            )
            .detach();

            cx.subscribe(
@@ -128,7 +136,7 @@ impl ActivityIndicator {
            }

            Self {
-                statuses: Default::default(),
+                statuses: Vec::new(),
                project: project.clone(),
                auto_updater,
                context_menu_handle: Default::default(),
@@ -198,11 +206,8 @@ impl ActivityIndicator {
        cx: &mut Context<Self>,
    ) {
        if let Some(updater) = &self.auto_updater {
-            updater.update(cx, |updater, cx| {
-                updater.dismiss_error(cx);
-            });
+            updater.update(cx, |updater, cx| updater.dismiss_error(cx));
        }
-        cx.notify();
    }

    fn pending_language_server_work<'a>(
--- a/crates/agent/Cargo.toml
+++ b/crates/agent/Cargo.toml
@@ -9,7 +9,7 @@ license = "GPL-3.0-or-later"
 workspace = true

 [lib]
-path = "src/assistant.rs"
+path = "src/agent.rs"
 doctest = false

 [features]
@@ -23,13 +23,13 @@ anyhow.workspace = true
 assistant_context_editor.workspace = true
 assistant_settings.workspace = true
 assistant_slash_command.workspace = true
+assistant_slash_commands.workspace = true
 assistant_tool.workspace = true
 async-watch.workspace = true
 buffer_diff.workspace = true
 chrono.workspace = true
 client.workspace = true
 collections.workspace = true
-command_palette_hooks.workspace = true
 component.workspace = true
 context_server.workspace = true
 convert_case.workspace = true
@@ -46,6 +46,7 @@ gpui.workspace = true
 heed.workspace = true
 html_to_markdown.workspace = true
 http_client.workspace = true
+indexed_docs.workspace = true
 itertools.workspace = true
 jsonschema.workspace = true
 language.workspace = true
@@ -90,6 +91,7 @@ time.workspace = true
 time_format.workspace = true
 ui.workspace = true
 ui_input.workspace = true
+urlencoding.workspace = true
 util.workspace = true
 uuid.workspace = true
 workspace-hack.workspace = true
--- a/crates/agent/src/active_thread.rs
+++ b/crates/agent/src/active_thread.rs
@@ -1,3 +1,4 @@
+use crate::AgentPanel;
 use crate::context::{AgentContextHandle, RULES_ICON};
 use crate::context_picker::{ContextPicker, MentionLink};
 use crate::context_store::ContextStore;
@@ -6,12 +7,11 @@ use crate::thread::{
    LastRestoreCheckpoint, MessageId, MessageSegment, Thread, ThreadError, ThreadEvent,
    ThreadFeedback,
 };
-use crate::thread_store::{RulesLoadingError, ThreadStore};
+use crate::thread_store::{RulesLoadingError, TextThreadStore, ThreadStore};
 use crate::tool_use::{PendingToolUseStatus, ToolUse};
 use crate::ui::{
    AddedContext, AgentNotification, AgentNotificationEvent, AnimatedLabel, ContextPill,
 };
-use crate::{AssistantPanel, OpenActiveThreadAsMarkdown};
 use anyhow::Context as _;
 use assistant_settings::{AssistantSettings, NotifyWhenAgentWaiting};
 use assistant_tool::ToolUseStatus;
@@ -35,7 +35,7 @@ use markdown::parser::{CodeBlockKind, CodeBlockMetadata};
 use markdown::{HeadingLevelStyles, Markdown, MarkdownElement, MarkdownStyle, ParsedMarkdown};
 use project::{ProjectEntryId, ProjectItem as _};
 use rope::Point;
-use settings::{Settings as _, update_settings_file};
+use settings::{Settings as _, SettingsStore, update_settings_file};
 use std::ffi::OsStr;
 use std::path::Path;
 use std::rc::Rc;
@@ -56,6 +56,7 @@ pub struct ActiveThread {
    context_store: Entity<ContextStore>,
    language_registry: Arc<LanguageRegistry>,
    thread_store: Entity<ThreadStore>,
+    text_thread_store: Entity<TextThreadStore>,
    thread: Entity<Thread>,
    workspace: WeakEntity<Workspace>,
    save_thread_task: Option<Task<()>>,
@@ -175,7 +176,7 @@ fn parse_markdown(
    cx.new(|cx| Markdown::new(text, Some(language_registry), None, cx))
 }

-fn default_markdown_style(window: &Window, cx: &App) -> MarkdownStyle {
+pub(crate) fn default_markdown_style(window: &Window, cx: &App) -> MarkdownStyle {
    let theme_settings = ThemeSettings::get_global(cx);
    let colors = cx.theme().colors();
    let ui_font_size = TextSize::Default.rems(cx);
@@ -711,7 +712,7 @@ fn open_markdown_link(
                .detach_and_log_err(cx);
        }
        Some(MentionLink::Thread(thread_id)) => workspace.update(cx, |workspace, cx| {
-            if let Some(panel) = workspace.panel::<AssistantPanel>(cx) {
+            if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
                panel.update(cx, |panel, cx| {
                    panel
                        .open_thread_by_id(&thread_id, window, cx)
@@ -719,6 +720,15 @@ fn open_markdown_link(
                });
            }
        }),
+        Some(MentionLink::TextThread(path)) => workspace.update(cx, |workspace, cx| {
+            if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
+                panel.update(cx, |panel, cx| {
+                    panel
+                        .open_saved_prompt_editor(path, window, cx)
+                        .detach_and_log_err(cx);
+                });
+            }
+        }),
        Some(MentionLink::Fetch(url)) => cx.open_url(&url),
        Some(MentionLink::Rule(prompt_id)) => window.dispatch_action(
            Box::new(OpenRulesLibrary {
@@ -743,6 +753,7 @@ impl ActiveThread {
    pub fn new(
        thread: Entity<Thread>,
        thread_store: Entity<ThreadStore>,
+        text_thread_store: Entity<TextThreadStore>,
        context_store: Entity<ContextStore>,
        language_registry: Arc<LanguageRegistry>,
        workspace: WeakEntity<Workspace>,
@@ -753,6 +764,7 @@ impl ActiveThread {
            cx.observe(&thread, |_, _, cx| cx.notify()),
            cx.subscribe_in(&thread, window, Self::handle_thread_event),
            cx.subscribe(&thread_store, Self::handle_rules_loading_error),
+            cx.observe_global::<SettingsStore>(|_, cx| cx.notify()),
        ];

        let list_state = ListState::new(0, ListAlignment::Bottom, px(2048.), {
@@ -765,6 +777,7 @@ impl ActiveThread {
        let mut this = Self {
            language_registry,
            thread_store,
+            text_thread_store,
            context_store,
            thread: thread.clone(),
            workspace,
@@ -844,6 +857,18 @@ impl ActiveThread {
            .map(|(id, state)| (*id, state.last_estimated_token_count.unwrap_or(0)))
    }

+    pub fn context_store(&self) -> &Entity<ContextStore> {
+        &self.context_store
+    }
+
+    pub fn thread_store(&self) -> &Entity<ThreadStore> {
+        &self.thread_store
+    }
+
+    pub fn text_thread_store(&self) -> &Entity<TextThreadStore> {
+        &self.text_thread_store
+    }
+
    fn push_message(
        &mut self,
        id: &MessageId,
@@ -1186,8 +1211,7 @@ impl ActiveThread {

                                            if let Some(workspace) = workspace_handle.upgrade() {
                                                workspace.update(_cx, |workspace, cx| {
-                                                    workspace
-                                                        .focus_panel::<AssistantPanel>(window, cx);
+                                                    workspace.focus_panel::<AgentPanel>(window, cx);
                                                });
                                            }
                                        })
@@ -1257,13 +1281,11 @@ impl ActiveThread {
            return;
        };

-        // Cancel any ongoing streaming when user starts editing a previous message
-        self.cancel_last_completion(window, cx);
-
        let editor = crate::message_editor::create_editor(
            self.workspace.clone(),
            self.context_store.downgrade(),
            self.thread_store.downgrade(),
+            self.text_thread_store.downgrade(),
            window,
            cx,
        );
@@ -1285,6 +1307,7 @@ impl ActiveThread {
                self.context_store.clone(),
                self.workspace.clone(),
                Some(self.thread_store.downgrade()),
+                Some(self.text_thread_store.downgrade()),
                context_picker_menu_handle.clone(),
                SuggestContextKind::File,
                window,
@@ -1388,8 +1411,12 @@ impl ActiveThread {
                        mode: None,
                        messages: vec![request_message],
                        tools: vec![],
+                        tool_choice: None,
                        stop: vec![],
-                        temperature: None,
+                        temperature: AssistantSettings::temperature_for_model(
+                            &configured_model.model,
+                            cx,
+                        ),
                    };

                    Some(configured_model.model.count_tokens(request, cx))
@@ -1667,12 +1694,14 @@ impl ActiveThread {
    fn render_edit_message_editor(
        &self,
        state: &EditingMessageState,
-        window: &mut Window,
+        _window: &mut Window,
        cx: &Context<Self>,
    ) -> impl IntoElement {
        let settings = ThemeSettings::get_global(cx);
-        let font_size = TextSize::Small.rems(cx);
-        let line_height = font_size.to_pixels(window.rem_size()) * 1.75;
+        let font_size = TextSize::Small
+            .rems(cx)
+            .to_pixels(settings.agent_font_size(cx));
+        let line_height = font_size * 1.75;

        let colors = cx.theme().colors();

@@ -1751,13 +1780,19 @@ impl ActiveThread {
        let colors = cx.theme().colors();
        let editor_bg_color = colors.editor_background;

-        let open_as_markdown = IconButton::new(("open-as-markdown", ix), IconName::FileCode)
-            .shape(ui::IconButtonShape::Square)
+        let open_as_markdown = IconButton::new(("open-as-markdown", ix), IconName::DocumentText)
            .icon_size(IconSize::XSmall)
            .icon_color(Color::Ignored)
            .tooltip(Tooltip::text("Open Thread as Markdown"))
-            .on_click(|_, window, cx| {
-                window.dispatch_action(Box::new(OpenActiveThreadAsMarkdown), cx)
+            .on_click({
+                let thread = self.thread.clone();
+                let workspace = self.workspace.clone();
+                move |_, window, cx| {
+                    if let Some(workspace) = workspace.upgrade() {
+                        open_active_thread_as_markdown(thread.clone(), workspace, window, cx)
+                            .detach_and_log_err(cx);
+                    }
+                }
            });

        // For all items that should be aligned with the LLM's response.
@@ -1770,13 +1805,16 @@ impl ActiveThread {
            .mt_1()
            .py_2()
            .px(RESPONSE_PADDING_X)
-            .gap_1()
+            .mr_1()
+            .opacity(0.4)
+            .hover(|style| style.opacity(1.))
+            .gap_1p5()
            .flex_wrap()
            .justify_end();
        let feedback_items = match self.thread.read(cx).message_feedback(message_id) {
            Some(feedback) => feedback_container
                .child(
-                    div().mr_1().visible_on_hover("feedback_container").child(
+                    div().visible_on_hover("feedback_container").child(
                        Label::new(match feedback {
                            ThreadFeedback::Positive => "Thanks for your feedback!",
                            ThreadFeedback::Negative => {
@@ -1789,11 +1827,8 @@ impl ActiveThread {
                )
                .child(
                    h_flex()
-                        .pr_1()
-                        .gap_1()
                        .child(
                            IconButton::new(("feedback-thumbs-up", ix), IconName::ThumbsUp)
-                                .shape(ui::IconButtonShape::Square)
                                .icon_size(IconSize::XSmall)
                                .icon_color(match feedback {
                                    ThreadFeedback::Positive => Color::Accent,
@@ -1811,7 +1846,6 @@ impl ActiveThread {
                        )
                        .child(
                            IconButton::new(("feedback-thumbs-down", ix), IconName::ThumbsDown)
-                                .shape(ui::IconButtonShape::Square)
                                .icon_size(IconSize::XSmall)
                                .icon_color(match feedback {
                                    ThreadFeedback::Positive => Color::Ignored,
@@ -1832,7 +1866,7 @@ impl ActiveThread {
                .into_any_element(),
            None => feedback_container
                .child(
-                    div().mr_1().visible_on_hover("feedback_container").child(
+                    div().visible_on_hover("feedback_container").child(
                        Label::new(
                            "Rating the thread sends all of your current conversation to the Zed team.",
                        )
@@ -1842,13 +1876,10 @@ impl ActiveThread {
                )
                .child(
                    h_flex()
-                        .pr_1()
-                        .gap_1()
                        .child(
                            IconButton::new(("feedback-thumbs-up", ix), IconName::ThumbsUp)
                                .icon_size(IconSize::XSmall)
                                .icon_color(Color::Ignored)
-                                .shape(ui::IconButtonShape::Square)
                                .tooltip(Tooltip::text("Helpful Response"))
                                .on_click(cx.listener(move |this, _, window, cx| {
                                    this.handle_feedback_click(
@@ -1863,7 +1894,6 @@ impl ActiveThread {
                            IconButton::new(("feedback-thumbs-down", ix), IconName::ThumbsDown)
                                .icon_size(IconSize::XSmall)
                                .icon_color(Color::Ignored)
-                                .shape(ui::IconButtonShape::Square)
                                .tooltip(Tooltip::text("Not Helpful"))
                                .on_click(cx.listener(move |this, _, window, cx| {
                                    this.handle_feedback_click(
@@ -2042,7 +2072,7 @@ impl ActiveThread {
        v_flex()
            .w_full()
            .map(|parent| {
-                if let Some(checkpoint) = checkpoint.filter(|_| is_generating) {
+                if let Some(checkpoint) = checkpoint.filter(|_| !is_generating) {
                    let mut is_pending = false;
                    let mut error = None;
                    if let Some(last_restore_checkpoint) =
@@ -3222,15 +3252,18 @@ impl ActiveThread {
            .map(|tool_use| tool_use.status.clone())
        {
            self.thread.update(cx, |thread, cx| {
-                thread.run_tool(
-                    c.tool_use_id.clone(),
-                    c.ui_text.clone(),
-                    c.input.clone(),
-                    &c.messages,
-                    c.tool.clone(),
-                    Some(window.window_handle()),
-                    cx,
-                );
+                if let Some(configured) = thread.get_or_init_configured_model(cx) {
+                    thread.run_tool(
+                        c.tool_use_id.clone(),
+                        c.ui_text.clone(),
+                        c.input.clone(),
+                        c.request.clone(),
+                        c.tool.clone(),
+                        configured.model,
+                        Some(window.window_handle()),
+                        cx,
+                    );
+                }
            });
        }
    }
@@ -3385,6 +3418,60 @@ impl Render for ActiveThread {
    }
 }

+pub(crate) fn open_active_thread_as_markdown(
+    thread: Entity<Thread>,
+    workspace: Entity<Workspace>,
+    window: &mut Window,
+    cx: &mut App,
+) -> Task<anyhow::Result<()>> {
+    let markdown_language_task = workspace
+        .read(cx)
+        .app_state()
+        .languages
+        .language_for_name("Markdown");
+
+    window.spawn(cx, async move |cx| {
+        let markdown_language = markdown_language_task.await?;
+
+        workspace.update_in(cx, |workspace, window, cx| {
+            let thread = thread.read(cx);
+            let markdown = thread.to_markdown(cx)?;
+            let thread_summary = thread
+                .summary()
+                .map(|summary| summary.to_string())
+                .unwrap_or_else(|| "Thread".to_string());
+
+            let project = workspace.project().clone();
+
+            if !project.read(cx).is_local() {
+                anyhow::bail!("failed to open active thread as markdown in remote project");
+            }
+
+            let buffer = project.update(cx, |project, cx| {
+                project.create_local_buffer(&markdown, Some(markdown_language), cx)
+            });
+            let buffer =
+                cx.new(|cx| MultiBuffer::singleton(buffer, cx).with_title(thread_summary.clone()));
+
+            workspace.add_item_to_active_pane(
+                Box::new(cx.new(|cx| {
+                    let mut editor =
+                        Editor::for_multibuffer(buffer, Some(project.clone()), window, cx);
+                    editor.set_breadcrumb_header(thread_summary);
+                    editor
+                })),
+                None,
+                true,
+                window,
+                cx,
+            );
+
+            anyhow::Ok(())
+        })??;
+        anyhow::Ok(())
+    })
+}
+
 pub(crate) fn open_context(
    context: &AgentContextHandle,
    workspace: Entity<Workspace>,
@@ -3437,16 +3524,23 @@ pub(crate) fn open_context(
        }

        AgentContextHandle::Thread(thread_context) => workspace.update(cx, |workspace, cx| {
-            if let Some(panel) = workspace.panel::<AssistantPanel>(cx) {
+            if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
                panel.update(cx, |panel, cx| {
-                    let thread_id = thread_context.thread.read(cx).id().clone();
-                    panel
-                        .open_thread_by_id(&thread_id, window, cx)
-                        .detach_and_log_err(cx)
+                    panel.open_thread(thread_context.thread.clone(), window, cx);
                });
            }
        }),

+        AgentContextHandle::TextThread(text_thread_context) => {
+            workspace.update(cx, |workspace, cx| {
+                if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
+                    panel.update(cx, |panel, cx| {
+                        panel.open_prompt_editor(text_thread_context.context.clone(), window, cx)
+                    });
+                }
+            })
+        }
+
        AgentContextHandle::Rules(rules_context) => window.dispatch_action(
            Box::new(OpenRulesLibrary {
                prompt_to_select: Some(rules_context.prompt_id.0),
@@ -3483,144 +3577,3 @@ fn open_editor_at_position(
        }
    })
 }
-
-#[cfg(test)]
-mod tests {
-    use assistant_tool::{ToolRegistry, ToolWorkingSet};
-    use editor::EditorSettings;
-    use fs::FakeFs;
-    use gpui::{TestAppContext, VisualTestContext};
-    use language_model::{LanguageModel, fake_provider::FakeLanguageModel};
-    use project::Project;
-    use prompt_store::PromptBuilder;
-    use serde_json::json;
-    use settings::SettingsStore;
-    use util::path;
-
-    use crate::{ContextLoadResult, thread_store};
-
-    use super::*;
-
-    #[gpui::test]
-    async fn test_current_completion_cancelled_when_message_edited(cx: &mut TestAppContext) {
-        init_test_settings(cx);
-
-        let project = create_test_project(
-            cx,
-            json!({"code.rs": "fn main() {\n    println!(\"Hello, world!\");\n}"}),
-        )
-        .await;
-
-        let (cx, active_thread, thread, model) = setup_test_environment(cx, project.clone()).await;
-
-        // Insert user message without any context (empty context vector)
-        let message = thread.update(cx, |thread, cx| {
-            let message_id = thread.insert_user_message(
-                "What is the best way to learn Rust?",
-                ContextLoadResult::default(),
-                None,
-                vec![],
-                cx,
-            );
-            thread
-                .message(message_id)
-                .expect("message should exist")
-                .clone()
-        });
-
-        // Stream response to user message
-        thread.update(cx, |thread, cx| {
-            let request = thread.to_completion_request(model.clone(), cx);
-            thread.stream_completion(request, model, cx.active_window(), cx)
-        });
-        let generating = thread.update(cx, |thread, _cx| thread.is_generating());
-        assert!(generating, "There should be one pending completion");
-
-        // Edit the previous message
-        active_thread.update_in(cx, |active_thread, window, cx| {
-            active_thread.start_editing_message(message.id, &message.segments, window, cx);
-        });
-
-        // Check that the stream was cancelled
-        let generating = thread.update(cx, |thread, _cx| thread.is_generating());
-        assert!(!generating, "The completion should have been cancelled");
-    }
-
-    fn init_test_settings(cx: &mut TestAppContext) {
-        cx.update(|cx| {
-            let settings_store = SettingsStore::test(cx);
-            cx.set_global(settings_store);
-            language::init(cx);
-            Project::init_settings(cx);
-            AssistantSettings::register(cx);
-            prompt_store::init(cx);
-            thread_store::init(cx);
-            workspace::init_settings(cx);
-            language_model::init_settings(cx);
-            ThemeSettings::register(cx);
-            EditorSettings::register(cx);
-            ToolRegistry::default_global(cx);
-        });
-    }
-
-    // Helper to create a test project with test files
-    async fn create_test_project(
-        cx: &mut TestAppContext,
-        files: serde_json::Value,
-    ) -> Entity<Project> {
-        let fs = FakeFs::new(cx.executor());
-        fs.insert_tree(path!("/test"), files).await;
-        Project::test(fs, [path!("/test").as_ref()], cx).await
-    }
-
-    async fn setup_test_environment(
-        cx: &mut TestAppContext,
-        project: Entity<Project>,
-    ) -> (
-        &mut VisualTestContext,
-        Entity<ActiveThread>,
-        Entity<Thread>,
-        Arc<dyn LanguageModel>,
-    ) {
-        let (workspace, cx) =
-            cx.add_window_view(|window, cx| Workspace::test_new(project.clone(), window, cx));
-
-        let thread_store = cx
-            .update(|_, cx| {
-                ThreadStore::load(
-                    project.clone(),
-                    cx.new(|_| ToolWorkingSet::default()),
-                    None,
-                    Arc::new(PromptBuilder::new(None).unwrap()),
-                    cx,
-                )
-            })
-            .await
-            .unwrap();
-
-        let thread = thread_store.update(cx, |store, cx| store.create_thread(cx));
-        let context_store = cx.new(|_cx| ContextStore::new(project.downgrade(), None));
-
-        let model = FakeLanguageModel::default();
-        let model: Arc<dyn LanguageModel> = Arc::new(model);
-
-        let language_registry = LanguageRegistry::new(cx.executor());
-        let language_registry = Arc::new(language_registry);
-
-        let active_thread = cx.update(|window, cx| {
-            cx.new(|cx| {
-                ActiveThread::new(
-                    thread.clone(),
-                    thread_store.clone(),
-                    context_store.clone(),
-                    language_registry.clone(),
-                    workspace.downgrade(),
-                    window,
-                    cx,
-                )
-            })
-        });
-
-        (cx, active_thread, thread, model)
-    }
-}
--- a/crates/assistant/src/assistant.rs
+++ b/crates/assistant/src/assistant.rs
@@ -1,102 +1,123 @@
-#![cfg_attr(target_os = "windows", allow(unused, dead_code))]
-
-mod assistant_configuration;
-pub mod assistant_panel;
+mod active_thread;
+mod agent_configuration;
+mod agent_diff;
+mod agent_model_selector;
+mod agent_panel;
+mod buffer_codegen;
+mod context;
+mod context_picker;
+mod context_server_configuration;
+mod context_server_tool;
+mod context_store;
+mod context_strip;
+mod debug;
+mod history_store;
 mod inline_assistant;
-pub mod slash_command_settings;
+mod inline_prompt_editor;
+mod message_editor;
+mod profile_selector;
+mod slash_command_settings;
+mod terminal_codegen;
 mod terminal_inline_assistant;
+mod thread;
+mod thread_history;
+mod thread_store;
+mod tool_compatibility;
+mod tool_use;
+mod ui;

 use std::sync::Arc;

-use assistant_settings::{AssistantSettings, LanguageModelSelection};
+use assistant_settings::{AgentProfileId, AssistantSettings, LanguageModelSelection};
 use assistant_slash_command::SlashCommandRegistry;
 use client::Client;
-use command_palette_hooks::CommandPaletteFilter;
-use feature_flags::FeatureFlagAppExt;
+use feature_flags::FeatureFlagAppExt as _;
 use fs::Fs;
-use gpui::{App, Global, ReadGlobal, UpdateGlobal, actions};
-use language_model::{
-    LanguageModelId, LanguageModelProviderId, LanguageModelRegistry, LanguageModelResponseMessage,
-};
+use gpui::{App, actions, impl_actions};
+use language::LanguageRegistry;
+use language_model::{LanguageModelId, LanguageModelProviderId, LanguageModelRegistry};
 use prompt_store::PromptBuilder;
+use schemars::JsonSchema;
 use serde::Deserialize;
-use settings::{Settings, SettingsStore};
+use settings::{Settings as _, SettingsStore};
+use thread::ThreadId;

-pub use crate::assistant_panel::{AssistantPanel, AssistantPanelEvent};
-pub(crate) use crate::inline_assistant::*;
+pub use crate::active_thread::ActiveThread;
+use crate::agent_configuration::{AddContextServerModal, ManageProfilesModal};
+pub use crate::agent_panel::{AgentPanel, ConcreteAssistantPanelDelegate};
+pub use crate::context::{ContextLoadResult, LoadedContext};
+pub use crate::inline_assistant::InlineAssistant;
 use crate::slash_command_settings::SlashCommandSettings;
+pub use crate::thread::{Message, MessageSegment, Thread, ThreadEvent};
+pub use crate::thread_store::{TextThreadStore, ThreadStore};
+pub use agent_diff::{AgentDiffPane, AgentDiffToolbar};
+pub use context_store::ContextStore;
+pub use ui::preview::{all_agent_previews, get_agent_preview};

 actions!(
-    assistant,
+    agent,
    [
-        InsertActivePrompt,
-        DeployHistory,
-        NewChat,
+        NewTextThread,
+        ToggleContextPicker,
+        ToggleNavigationMenu,
+        ToggleOptionsMenu,
+        DeleteRecentlyOpenThread,
+        ToggleProfileSelector,
+        RemoveAllContext,
+        ExpandMessageEditor,
+        OpenHistory,
+        AddContextServer,
+        RemoveSelectedThread,
+        Chat,
        CycleNextInlineAssist,
-        CyclePreviousInlineAssist
+        CyclePreviousInlineAssist,
+        FocusUp,
+        FocusDown,
+        FocusLeft,
+        FocusRight,
+        RemoveFocusedContext,
+        AcceptSuggestedContext,
+        OpenActiveThreadAsMarkdown,
+        OpenAgentDiff,
+        Keep,
+        Reject,
+        RejectAll,
+        KeepAll,
+        Follow,
+        ResetTrialUpsell,
    ]
 );

-const DEFAULT_CONTEXT_LINES: usize = 50;
-
-#[derive(Deserialize, Debug)]
-pub struct LanguageModelUsage {
-    pub prompt_tokens: u32,
-    pub completion_tokens: u32,
-    pub total_tokens: u32,
+#[derive(Default, Clone, PartialEq, Deserialize, JsonSchema)]
+pub struct NewThread {
+    #[serde(default)]
+    from_thread_id: Option<ThreadId>,
 }

-#[derive(Deserialize, Debug)]
-pub struct LanguageModelChoiceDelta {
-    pub index: u32,
-    pub delta: LanguageModelResponseMessage,
-    pub finish_reason: Option<String>,
+#[derive(PartialEq, Clone, Default, Debug, Deserialize, JsonSchema)]
+pub struct ManageProfiles {
+    #[serde(default)]
+    pub customize_tools: Option<AgentProfileId>,
 }

-/// The state pertaining to the Assistant.
-#[derive(Default)]
-struct Assistant {
-    /// Whether the Assistant is enabled.
-    enabled: bool,
-}
-
-impl Global for Assistant {}
-
-impl Assistant {
-    const NAMESPACE: &'static str = "assistant";
-
-    fn set_enabled(&mut self, enabled: bool, cx: &mut App) {
-        if self.enabled == enabled {
-            return;
+impl ManageProfiles {
+    pub fn customize_tools(profile_id: AgentProfileId) -> Self {
+        Self {
+            customize_tools: Some(profile_id),
        }
-
-        self.enabled = enabled;
-
-        if !enabled {
-            CommandPaletteFilter::update_global(cx, |filter, _cx| {
-                filter.hide_namespace(Self::NAMESPACE);
-            });
-
-            return;
-        }
-
-        CommandPaletteFilter::update_global(cx, |filter, _cx| {
-            filter.show_namespace(Self::NAMESPACE);
-        });
-    }
-
-    pub fn enabled(cx: &App) -> bool {
-        Self::global(cx).enabled
    }
 }

+impl_actions!(agent, [NewThread, ManageProfiles]);
+
+/// Initializes the `agent` crate.
 pub fn init(
    fs: Arc<dyn Fs>,
    client: Arc<Client>,
    prompt_builder: Arc<PromptBuilder>,
+    language_registry: Arc<LanguageRegistry>,
    cx: &mut App,
 ) {
-    cx.set_global(Assistant::default());
    AssistantSettings::register(cx);
    SlashCommandSettings::register(cx);

@@ -104,8 +125,9 @@ pub fn init(
    rules_library::init(cx);
    init_language_model_settings(cx);
    assistant_slash_command::init(cx);
-    assistant_tool::init(cx);
-    assistant_panel::init(cx);
+    thread_store::init(cx);
+    agent_panel::init(cx);
+    context_server_configuration::init(language_registry, cx);

    register_slash_commands(cx);
    inline_assistant::init(
@@ -121,22 +143,8 @@ pub fn init(
        cx,
    );
    indexed_docs::init(cx);
-
-    CommandPaletteFilter::update_global(cx, |filter, _cx| {
-        filter.hide_namespace(Assistant::NAMESPACE);
-    });
-    Assistant::update_global(cx, |assistant, cx| {
-        let settings = AssistantSettings::get_global(cx);
-
-        assistant.set_enabled(settings.enabled, cx);
-    });
-    cx.observe_global::<SettingsStore>(|cx| {
-        Assistant::update_global(cx, |assistant, cx| {
-            let settings = AssistantSettings::get_global(cx);
-            assistant.set_enabled(settings.enabled, cx);
-        });
-    })
-    .detach();
+    cx.observe_new(AddContextServerModal::register).detach();
+    cx.observe_new(ManageProfilesModal::register).detach();
 }

 fn init_language_model_settings(cx: &mut App) {
@@ -163,7 +171,7 @@ fn update_active_language_model_from_settings(cx: &mut App) {

    fn to_selected_model(selection: &LanguageModelSelection) -> language_model::SelectedModel {
        language_model::SelectedModel {
-            provider: LanguageModelProviderId::from(selection.provider.clone()),
+            provider: LanguageModelProviderId::from(selection.provider.0.clone()),
            model: LanguageModelId::from(selection.model.clone()),
        }
    }
@@ -250,11 +258,3 @@ fn update_slash_commands_from_settings(cx: &mut App) {
            .unregister_command(assistant_slash_commands::CargoWorkspaceSlashCommand);
    }
 }
-
-#[cfg(test)]
-#[ctor::ctor]
-fn init_logger() {
-    if std::env::var("RUST_LOG").is_ok() {
-        env_logger::init();
-    }
-}
--- a/crates/agent/src/assistant_configuration.rs
+++ b/crates/agent/src/assistant_configuration.rs
@@ -30,7 +30,7 @@ pub(crate) use manage_profiles_modal::ManageProfilesModal;

 use crate::AddContextServer;

-pub struct AssistantConfiguration {
+pub struct AgentConfiguration {
    fs: Arc<dyn Fs>,
    focus_handle: FocusHandle,
    configuration_views_by_provider: HashMap<LanguageModelProviderId, AnyView>,
@@ -42,7 +42,7 @@ pub struct AssistantConfiguration {
    scrollbar_state: ScrollbarState,
 }

-impl AssistantConfiguration {
+impl AgentConfiguration {
    pub fn new(
        fs: Arc<dyn Fs>,
        context_server_store: Entity<ContextServerStore>,
@@ -110,7 +110,7 @@ impl AssistantConfiguration {
    }
 }

-impl Focusable for AssistantConfiguration {
+impl Focusable for AgentConfiguration {
    fn focus_handle(&self, _: &App) -> FocusHandle {
        self.focus_handle.clone()
    }
@@ -120,9 +120,9 @@ pub enum AssistantConfigurationEvent {
    NewThread(Arc<dyn LanguageModelProvider>),
 }

-impl EventEmitter<AssistantConfigurationEvent> for AssistantConfiguration {}
+impl EventEmitter<AssistantConfigurationEvent> for AgentConfiguration {}

-impl AssistantConfiguration {
+impl AgentConfiguration {
    fn render_provider_configuration_block(
        &mut self,
        provider: &Arc<dyn LanguageModelProvider>,
@@ -571,7 +571,7 @@ impl AssistantConfiguration {
    }
 }

-impl Render for AssistantConfiguration {
+impl Render for AgentConfiguration {
    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
        v_flex()
            .id("assistant-configuration")
--- a/crates/agent/src/assistant_configuration/add_context_server_modal.rs
+++ b/crates/agent/src/assistant_configuration/add_context_server_modal.rs
@@ -147,47 +147,50 @@ impl Render for AddContextServerModal {
                        ),
                    )
                    .footer(
-                        ModalFooter::new()
-                            .start_slot(
-                                Button::new("cancel", "Cancel")
-                                    .key_binding(
-                                        KeyBinding::for_action_in(
-                                            &menu::Cancel,
-                                            &focus_handle,
-                                            window,
-                                            cx,
+                        ModalFooter::new().end_slot(
+                            h_flex()
+                                .gap_2()
+                                .child(
+                                    Button::new("cancel", "Cancel")
+                                        .key_binding(
+                                            KeyBinding::for_action_in(
+                                                &menu::Cancel,
+                                                &focus_handle,
+                                                window,
+                                                cx,
+                                            )
+                                            .map(|kb| kb.size(rems_from_px(12.))),
                                        )
-                                        .map(|kb| kb.size(rems_from_px(12.))),
-                                    )
-                                    .on_click(cx.listener(|this, _event, _window, cx| {
-                                        this.cancel(&menu::Cancel, cx)
-                                    })),
-                            )
-                            .end_slot(
-                                Button::new("add-server", "Add Server")
-                                    .disabled(is_name_empty || is_command_empty)
-                                    .key_binding(
-                                        KeyBinding::for_action_in(
-                                            &menu::Confirm,
-                                            &focus_handle,
-                                            window,
-                                            cx,
+                                        .on_click(cx.listener(|this, _event, _window, cx| {
+                                            this.cancel(&menu::Cancel, cx)
+                                        })),
+                                )
+                                .child(
+                                    Button::new("add-server", "Add Server")
+                                        .disabled(is_name_empty || is_command_empty)
+                                        .key_binding(
+                                            KeyBinding::for_action_in(
+                                                &menu::Confirm,
+                                                &focus_handle,
+                                                window,
+                                                cx,
+                                            )
+                                            .map(|kb| kb.size(rems_from_px(12.))),
                                        )
-                                        .map(|kb| kb.size(rems_from_px(12.))),
-                                    )
-                                    .map(|button| {
-                                        if is_name_empty {
-                                            button.tooltip(Tooltip::text("Name is required"))
-                                        } else if is_command_empty {
-                                            button.tooltip(Tooltip::text("Command is required"))
-                                        } else {
-                                            button
-                                        }
-                                    })
-                                    .on_click(cx.listener(|this, _event, _window, cx| {
-                                        this.confirm(&menu::Confirm, cx)
-                                    })),
-                            ),
+                                        .map(|button| {
+                                            if is_name_empty {
+                                                button.tooltip(Tooltip::text("Name is required"))
+                                            } else if is_command_empty {
+                                                button.tooltip(Tooltip::text("Command is required"))
+                                            } else {
+                                                button
+                                            }
+                                        })
+                                        .on_click(cx.listener(|this, _event, _window, cx| {
+                                            this.confirm(&menu::Confirm, cx)
+                                        })),
+                                ),
+                        ),
                    ),
            )
    }
--- a/crates/agent/src/assistant_configuration/configure_context_server_modal.rs
+++ b/crates/agent/src/assistant_configuration/configure_context_server_modal.rs
@@ -19,18 +19,24 @@ use project::{
 };
 use settings::{Settings as _, update_settings_file};
 use theme::ThemeSettings;
-use ui::{KeyBinding, Modal, ModalFooter, ModalHeader, Section, prelude::*};
+use ui::{KeyBinding, Modal, ModalFooter, ModalHeader, Section, Tooltip, prelude::*};
 use util::ResultExt;
 use workspace::{ModalView, Workspace};

 pub(crate) struct ConfigureContextServerModal {
    workspace: WeakEntity<Workspace>,
-    context_servers_to_setup: Vec<ConfigureContextServer>,
+    focus_handle: FocusHandle,
+    context_servers_to_setup: Vec<ContextServerSetup>,
    context_server_store: Entity<ContextServerStore>,
 }

-struct ConfigureContextServer {
-    id: ContextServerId,
+#[allow(clippy::large_enum_variant)]
+enum Configuration {
+    NotAvailable,
+    Required(ConfigurationRequiredState),
+}
+
+struct ConfigurationRequiredState {
    installation_instructions: Entity<markdown::Markdown>,
    settings_validator: Option<jsonschema::Validator>,
    settings_editor: Entity<Editor>,
@@ -38,64 +44,91 @@ struct ConfigureContextServer {
    waiting_for_context_server: bool,
 }

+struct ContextServerSetup {
+    id: ContextServerId,
+    repository_url: Option<SharedString>,
+    configuration: Configuration,
+}
+
 impl ConfigureContextServerModal {
    pub fn new(
-        configurations: impl Iterator<Item = (ContextServerId, extension::ContextServerConfiguration)>,
+        configurations: impl Iterator<Item = crate::context_server_configuration::Configuration>,
        context_server_store: Entity<ContextServerStore>,
        jsonc_language: Option<Arc<Language>>,
        language_registry: Arc<LanguageRegistry>,
        workspace: WeakEntity<Workspace>,
        window: &mut Window,
-        cx: &mut App,
-    ) -> Option<Self> {
+        cx: &mut Context<Self>,
+    ) -> Self {
        let context_servers_to_setup = configurations
-            .map(|(id, manifest)| {
-                let jsonc_language = jsonc_language.clone();
-                let settings_validator = jsonschema::validator_for(&manifest.settings_schema)
-                    .context("Failed to load JSON schema for context server settings")
-                    .log_err();
-                ConfigureContextServer {
-                    id: id.clone(),
-                    installation_instructions: cx.new(|cx| {
-                        Markdown::new(
-                            manifest.installation_instructions.clone().into(),
-                            Some(language_registry.clone()),
-                            None,
-                            cx,
-                        )
-                    }),
-                    settings_validator,
-                    settings_editor: cx.new(|cx| {
-                        let mut editor = Editor::auto_height(16, window, cx);
-                        editor.set_text(manifest.default_settings.trim(), window, cx);
-                        editor.set_show_gutter(false, cx);
-                        editor.set_soft_wrap_mode(language::language_settings::SoftWrap::None, cx);
-                        if let Some(buffer) = editor.buffer().read(cx).as_singleton() {
-                            buffer.update(cx, |buffer, cx| buffer.set_language(jsonc_language, cx))
-                        }
-                        editor
-                    }),
-                    waiting_for_context_server: false,
-                    last_error: None,
+            .map(|config| match config {
+                crate::context_server_configuration::Configuration::NotAvailable(
+                    context_server_id,
+                    repository_url,
+                ) => ContextServerSetup {
+                    id: context_server_id,
+                    repository_url,
+                    configuration: Configuration::NotAvailable,
+                },
+                crate::context_server_configuration::Configuration::Required(
+                    context_server_id,
+                    repository_url,
+                    config,
+                ) => {
+                    let jsonc_language = jsonc_language.clone();
+                    let settings_validator = jsonschema::validator_for(&config.settings_schema)
+                        .context("Failed to load JSON schema for context server settings")
+                        .log_err();
+                    let state = ConfigurationRequiredState {
+                        installation_instructions: cx.new(|cx| {
+                            Markdown::new(
+                                config.installation_instructions.clone().into(),
+                                Some(language_registry.clone()),
+                                None,
+                                cx,
+                            )
+                        }),
+                        settings_validator,
+                        settings_editor: cx.new(|cx| {
+                            let mut editor = Editor::auto_height(16, window, cx);
+                            editor.set_text(config.default_settings.trim(), window, cx);
+                            editor.set_show_gutter(false, cx);
+                            editor.set_soft_wrap_mode(
+                                language::language_settings::SoftWrap::None,
+                                cx,
+                            );
+                            if let Some(buffer) = editor.buffer().read(cx).as_singleton() {
+                                buffer.update(cx, |buffer, cx| {
+                                    buffer.set_language(jsonc_language, cx)
+                                })
+                            }
+                            editor
+                        }),
+                        waiting_for_context_server: false,
+                        last_error: None,
+                    };
+                    ContextServerSetup {
+                        id: context_server_id,
+                        repository_url,
+                        configuration: Configuration::Required(state),
+                    }
                }
            })
            .collect::<Vec<_>>();

-        if context_servers_to_setup.is_empty() {
-            return None;
-        }
-
-        Some(Self {
+        Self {
            workspace,
+            focus_handle: cx.focus_handle(),
            context_servers_to_setup,
            context_server_store,
-        })
+        }
    }
 }

 impl ConfigureContextServerModal {
    pub fn confirm(&mut self, cx: &mut Context<Self>) {
        if self.context_servers_to_setup.is_empty() {
+            self.dismiss(cx);
            return;
        }

@@ -103,7 +136,18 @@ impl ConfigureContextServerModal {
            return;
        };

-        let configuration = &mut self.context_servers_to_setup[0];
+        let id = self.context_servers_to_setup[0].id.clone();
+        let configuration = match &mut self.context_servers_to_setup[0].configuration {
+            Configuration::NotAvailable => {
+                self.context_servers_to_setup.remove(0);
+                if self.context_servers_to_setup.is_empty() {
+                    self.dismiss(cx);
+                }
+                return;
+            }
+            Configuration::Required(state) => state,
+        };
+
        configuration.last_error.take();
        if configuration.waiting_for_context_server {
            return;
@@ -127,7 +171,7 @@ impl ConfigureContextServerModal {
                return;
            }
        }
-        let id = configuration.id.clone();
+        let id = id.clone();

        let settings_changed = ProjectSettings::get_global(cx)
            .context_servers
@@ -156,9 +200,14 @@ impl ConfigureContextServerModal {
                        this.complete_setup(id, cx);
                    }
                    Err(err) => {
-                        if let Some(configuration) = this.context_servers_to_setup.get_mut(0) {
-                            configuration.last_error = Some(err.into());
-                            configuration.waiting_for_context_server = false;
+                        if let Some(setup) = this.context_servers_to_setup.get_mut(0) {
+                            match &mut setup.configuration {
+                                Configuration::NotAvailable => {}
+                                Configuration::Required(state) => {
+                                    state.last_error = Some(err.into());
+                                    state.waiting_for_context_server = false;
+                                }
+                            }
                        } else {
                            this.dismiss(cx);
                        }
@@ -267,8 +316,8 @@ fn wait_for_context_server(

 impl Render for ConfigureContextServerModal {
    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        let Some(configuration) = self.context_servers_to_setup.first() else {
-            return div().child("No context servers to setup");
+        let Some(setup) = self.context_servers_to_setup.first() else {
+            return div().into_any_element();
        };

        let focus_handle = self.focus_handle(cx);
@@ -277,6 +326,7 @@ impl Render for ConfigureContextServerModal {
            .elevation_3(cx)
            .w(rems(42.))
            .key_context("ConfigureContextServerModal")
+            .track_focus(&focus_handle)
            .on_action(cx.listener(|this, _: &menu::Confirm, _window, cx| this.confirm(cx)))
            .on_action(cx.listener(|this, _: &menu::Cancel, _window, cx| this.dismiss(cx)))
            .capture_any_mouse_down(cx.listener(|this, _, window, cx| {
@@ -284,9 +334,15 @@ impl Render for ConfigureContextServerModal {
            }))
            .child(
                Modal::new("configure-context-server", None)
-                    .header(ModalHeader::new().headline(format!("Configure {}", configuration.id)))
-                    .section(
-                        Section::new()
+                    .header(ModalHeader::new().headline(format!("Configure {}", setup.id)))
+                    .section(match &setup.configuration {
+                        Configuration::NotAvailable => Section::new().child(
+                            Label::new(
+                                "No configuration options available for this context server. Visit the Repository for any further instructions.",
+                            )
+                            .color(Color::Muted),
+                        ),
+                        Configuration::Required(configuration) => Section::new()
                            .child(div().pb_2().text_sm().child(MarkdownElement::new(
                                configuration.installation_instructions.clone(),
                                default_markdown_style(window, cx),
@@ -370,45 +426,84 @@ impl Render for ConfigureContextServerModal {
                                        ),
                                )
                            }),
-                    )
+                    })
                    .footer(
-                        ModalFooter::new().end_slot(
-                            h_flex()
-                                .gap_1()
-                                .child(
-                                    Button::new("cancel", "Cancel")
-                                        .key_binding(
-                                            KeyBinding::for_action_in(
-                                                &menu::Cancel,
-                                                &focus_handle,
-                                                window,
-                                                cx,
-                                            )
-                                            .map(|kb| kb.size(rems_from_px(12.))),
-                                        )
-                                        .on_click(cx.listener(|this, _event, _window, cx| {
-                                            this.dismiss(cx)
-                                        })),
+                        ModalFooter::new()
+                            .when_some(setup.repository_url.clone(), |this, repository_url| {
+                                this.start_slot(
+                                    h_flex().w_full().child(
+                                        Button::new("open-repository", "Open Repository")
+                                            .icon(IconName::ArrowUpRight)
+                                            .icon_color(Color::Muted)
+                                            .icon_size(IconSize::XSmall)
+                                            .tooltip({
+                                                let repository_url = repository_url.clone();
+                                                move |window, cx| {
+                                                    Tooltip::with_meta(
+                                                        "Open Repository",
+                                                        None,
+                                                        repository_url.clone(),
+                                                        window,
+                                                        cx,
+                                                    )
+                                                }
+                                            })
+                                            .on_click(move |_, _, cx| cx.open_url(&repository_url)),
+                                    ),
                                )
-                                .child(
-                                    Button::new("configure-server", "Configure MCP")
-                                        .disabled(configuration.waiting_for_context_server)
-                                        .key_binding(
-                                            KeyBinding::for_action_in(
-                                                &menu::Confirm,
-                                                &focus_handle,
-                                                window,
-                                                cx,
-                                            )
-                                            .map(|kb| kb.size(rems_from_px(12.))),
+                            })
+                            .end_slot(match &setup.configuration {
+                                Configuration::NotAvailable => Button::new("dismiss", "Dismiss")
+                                    .key_binding(
+                                        KeyBinding::for_action_in(
+                                            &menu::Cancel,
+                                            &focus_handle,
+                                            window,
+                                            cx,
                                        )
-                                        .on_click(cx.listener(|this, _event, _window, cx| {
-                                            this.confirm(cx)
-                                        })),
-                                ),
-                        ),
+                                        .map(|kb| kb.size(rems_from_px(12.))),
+                                    )
+                                    .on_click(
+                                        cx.listener(|this, _event, _window, cx| this.dismiss(cx)),
+                                    )
+                                    .into_any_element(),
+                                Configuration::Required(state) => h_flex()
+                                    .gap_2()
+                                    .child(
+                                        Button::new("cancel", "Cancel")
+                                            .key_binding(
+                                                KeyBinding::for_action_in(
+                                                    &menu::Cancel,
+                                                    &focus_handle,
+                                                    window,
+                                                    cx,
+                                                )
+                                                .map(|kb| kb.size(rems_from_px(12.))),
+                                            )
+                                            .on_click(cx.listener(|this, _event, _window, cx| {
+                                                this.dismiss(cx)
+                                            })),
+                                    )
+                                    .child(
+                                        Button::new("configure-server", "Configure MCP")
+                                            .disabled(state.waiting_for_context_server)
+                                            .key_binding(
+                                                KeyBinding::for_action_in(
+                                                    &menu::Confirm,
+                                                    &focus_handle,
+                                                    window,
+                                                    cx,
+                                                )
+                                                .map(|kb| kb.size(rems_from_px(12.))),
+                                            )
+                                            .on_click(cx.listener(|this, _event, _window, cx| {
+                                                this.confirm(cx)
+                                            })),
+                                    )
+                                    .into_any_element(),
+                            }),
                    ),
-            )
+            ).into_any_element()
    }
 }

@@ -446,9 +541,14 @@ impl EventEmitter<DismissEvent> for ConfigureContextServerModal {}
 impl Focusable for ConfigureContextServerModal {
    fn focus_handle(&self, cx: &App) -> FocusHandle {
        if let Some(current) = self.context_servers_to_setup.first() {
-            current.settings_editor.read(cx).focus_handle(cx)
+            match &current.configuration {
+                Configuration::NotAvailable => self.focus_handle.clone(),
+                Configuration::Required(configuration) => {
+                    configuration.settings_editor.read(cx).focus_handle(cx)
+                }
+            }
        } else {
-            cx.focus_handle()
+            self.focus_handle.clone()
        }
    }
 }
--- a/crates/agent/src/assistant_configuration/manage_profiles_modal.rs
+++ b/crates/agent/src/assistant_configuration/manage_profiles_modal.rs
@@ -18,9 +18,9 @@ use ui::{
 use util::ResultExt as _;
 use workspace::{ModalView, Workspace};

-use crate::assistant_configuration::manage_profiles_modal::profile_modal_header::ProfileModalHeader;
-use crate::assistant_configuration::tool_picker::{ToolPicker, ToolPickerDelegate};
-use crate::{AssistantPanel, ManageProfiles, ThreadStore};
+use crate::agent_configuration::manage_profiles_modal::profile_modal_header::ProfileModalHeader;
+use crate::agent_configuration::tool_picker::{ToolPicker, ToolPickerDelegate};
+use crate::{AgentPanel, ManageProfiles, ThreadStore};

 use super::tool_picker::ToolPickerMode;

@@ -115,7 +115,7 @@ impl ManageProfilesModal {
        _cx: &mut Context<Workspace>,
    ) {
        workspace.register_action(|workspace, action: &ManageProfiles, window, cx| {
-            if let Some(panel) = workspace.panel::<AssistantPanel>(cx) {
+            if let Some(panel) = workspace.panel::<AgentPanel>(cx) {
                let fs = workspace.app_state().fs.clone();
                let thread_store = panel.read(cx).thread_store();
                let tools = thread_store.read(cx).tools();
@@ -124,7 +124,7 @@ impl ManageProfilesModal {
                    let mut this = Self::new(fs, tools, thread_store, window, cx);

                    if let Some(profile_id) = action.customize_tools.clone() {
-                        this.configure_tools(profile_id, window, cx);
+                        this.configure_builtin_tools(profile_id, window, cx);
                    }

                    this
@@ -190,7 +190,7 @@ impl ManageProfilesModal {
        self.focus_handle(cx).focus(window);
    }

-    fn configure_mcps(
+    fn configure_mcp_tools(
        &mut self,
        profile_id: AgentProfileId,
        window: &mut Window,
@@ -228,7 +228,7 @@ impl ManageProfilesModal {
        self.focus_handle(cx).focus(window);
    }

-    fn configure_tools(
+    fn configure_builtin_tools(
        &mut self,
        profile_id: AgentProfileId,
        window: &mut Window,
@@ -581,16 +581,20 @@ impl ManageProfilesModal {
                        )
                        .child(
                            div()
-                                .id("configure-tools")
+                                .id("configure-builtin-tools")
                                .track_focus(&mode.configure_tools.focus_handle)
                                .on_action({
                                    let profile_id = mode.profile_id.clone();
                                    cx.listener(move |this, _: &menu::Confirm, window, cx| {
-                                        this.configure_tools(profile_id.clone(), window, cx);
+                                        this.configure_builtin_tools(
+                                            profile_id.clone(),
+                                            window,
+                                            cx,
+                                        );
                                    })
                                })
                                .child(
-                                    ListItem::new("configure-tools")
+                                    ListItem::new("configure-builtin-tools-item")
                                        .toggle_state(
                                            mode.configure_tools
                                                .focus_handle
@@ -603,11 +607,11 @@ impl ManageProfilesModal {
                                                .size(IconSize::Small)
                                                .color(Color::Muted),
                                        )
-                                        .child(Label::new("Configure Tools"))
+                                        .child(Label::new("Configure Built-in Tools"))
                                        .on_click({
                                            let profile_id = mode.profile_id.clone();
                                            cx.listener(move |this, _, window, cx| {
-                                                this.configure_tools(
+                                                this.configure_builtin_tools(
                                                    profile_id.clone(),
                                                    window,
                                                    cx,
@@ -623,11 +627,11 @@ impl ManageProfilesModal {
                                .on_action({
                                    let profile_id = mode.profile_id.clone();
                                    cx.listener(move |this, _: &menu::Confirm, window, cx| {
-                                        this.configure_mcps(profile_id.clone(), window, cx);
+                                        this.configure_mcp_tools(profile_id.clone(), window, cx);
                                    })
                                })
                                .child(
-                                    ListItem::new("configure-mcps")
+                                    ListItem::new("configure-mcp-tools")
                                        .toggle_state(
                                            mode.configure_mcps
                                                .focus_handle
@@ -640,11 +644,15 @@ impl ManageProfilesModal {
                                                .size(IconSize::Small)
                                                .color(Color::Muted),
                                        )
-                                        .child(Label::new("Configure MCP Servers"))
+                                        .child(Label::new("Configure MCP Tools"))
                                        .on_click({
                                            let profile_id = mode.profile_id.clone();
                                            cx.listener(move |this, _, window, cx| {
-                                                this.configure_mcps(profile_id.clone(), window, cx);
+                                                this.configure_mcp_tools(
+                                                    profile_id.clone(),
+                                                    window,
+                                                    cx,
+                                                );
                                            })
                                        }),
                                ),
@@ -777,7 +785,7 @@ impl Render for ManageProfilesModal {
                    v_flex()
                        .pb_1()
                        .child(ProfileModalHeader::new(
-                            format!("{profile_name} — Configure Tools"),
+                            format!("{profile_name} — Configure Built-in Tools"),
                            Some(IconName::Cog),
                        ))
                        .child(ListSeparator)
@@ -800,7 +808,7 @@ impl Render for ManageProfilesModal {
                    v_flex()
                        .pb_1()
                        .child(ProfileModalHeader::new(
-                            format!("{profile_name} — Configure MCP Servers"),
+                            format!("{profile_name} — Configure MCP Tools"),
                            Some(IconName::Hammer),
                        ))
                        .child(ListSeparator)
--- a/crates/agent/src/assistant_configuration/manage_profiles_modal/profile_modal_header.rs
+++ b/crates/agent/src/assistant_configuration/manage_profiles_modal/profile_modal_header.rs
--- a/crates/agent/src/assistant_configuration/tool_picker.rs
+++ b/crates/agent/src/assistant_configuration/tool_picker.rs
@@ -176,7 +176,7 @@ impl PickerDelegate for ToolPickerDelegate {
    fn placeholder_text(&self, _window: &mut Window, _cx: &mut App) -> Arc<str> {
        match self.mode {
            ToolPickerMode::BuiltinTools => "Search built-in tools…",
-            ToolPickerMode::McpTools => "Search MCP servers…",
+            ToolPickerMode::McpTools => "Search MCP tools…",
        }
        .into()
    }
--- a/crates/agent/src/agent_diff.rs
+++ b/crates/agent/src/agent_diff.rs
@@ -26,7 +26,7 @@ use std::{
    ops::Range,
    sync::Arc,
 };
-use ui::{Divider, IconButtonShape, KeyBinding, Tooltip, prelude::*, vertical_divider};
+use ui::{IconButtonShape, KeyBinding, Tooltip, prelude::*, vertical_divider};
 use util::ResultExt;
 use workspace::{
    Item, ItemHandle, ItemNavHistory, ToolbarItemEvent, ToolbarItemLocation, ToolbarItemView,
@@ -219,7 +219,7 @@ impl AgentDiffPane {
            .thread
            .read(cx)
            .summary()
-            .unwrap_or("Assistant Changes".into());
+            .unwrap_or("Agent Changes".into());
        if new_title != self.title {
            self.title = new_title;
            cx.emit(EditorEvent::TitleChanged);
@@ -473,7 +473,7 @@ impl Item for AgentDiffPane {
            .thread
            .read(cx)
            .summary()
-            .unwrap_or("Assistant Changes".into());
+            .unwrap_or("Agent Changes".into());
        Label::new(format!("Review: {}", summary))
            .color(if params.selected {
                Color::Default
@@ -1035,8 +1035,8 @@ impl Render for AgentDiffToolbar {
                                        }
                                    }),
                            )
-                            .into_any(),
-                        Divider::vertical().into_any_element(),
+                            .into_any_element(),
+                        vertical_divider().into_any_element(),
                        h_flex()
                            .gap_0p5()
                            .child(
@@ -1069,37 +1069,34 @@ impl Render for AgentDiffToolbar {
                                        this.dispatch_action(&KeepAll, window, cx)
                                    })),
                            )
-                            .into_any(),
-                        Divider::vertical().into_any_element(),
+                            .into_any_element(),
                    ],
                };

                h_flex()
                    .track_focus(&editor_focus_handle)
                    .size_full()
-                    .child(
-                        h_flex()
-                            .py(DynamicSpacing::Base08.rems(cx))
-                            .px_2()
-                            .gap_1()
-                            .children(content)
-                            .when_some(editor.read(cx).workspace(), |this, _workspace| {
-                                this.child(
-                                    IconButton::new("review", IconName::ListCollapse)
-                                        .icon_size(IconSize::Small)
-                                        .tooltip(Tooltip::for_action_title_in(
-                                            "Review All Files",
-                                            &OpenAgentDiff,
-                                            &editor_focus_handle,
-                                        ))
-                                        .on_click({
-                                            cx.listener(move |this, _, window, cx| {
-                                                this.dispatch_action(&OpenAgentDiff, window, cx);
-                                            })
-                                        }),
-                                )
-                            }),
-                    )
+                    .px_1()
+                    .mr_1()
+                    .gap_1()
+                    .children(content)
+                    .child(vertical_divider())
+                    .when_some(editor.read(cx).workspace(), |this, _workspace| {
+                        this.child(
+                            IconButton::new("review", IconName::ListCollapse)
+                                .icon_size(IconSize::Small)
+                                .tooltip(Tooltip::for_action_title_in(
+                                    "Review All Files",
+                                    &OpenAgentDiff,
+                                    &editor_focus_handle,
+                                ))
+                                .on_click({
+                                    cx.listener(move |this, _, window, cx| {
+                                        this.dispatch_action(&OpenAgentDiff, window, cx);
+                                    })
+                                }),
+                        )
+                    })
                    .child(vertical_divider())
                    .on_action({
                        let editor = editor.clone();
@@ -1129,7 +1126,8 @@ impl Render for AgentDiffToolbar {
                let focus_handle = agent_diff.focus_handle(cx);

                h_group_xl()
-                    .px_2()
+                    .my_neg_1()
+                    .py_1()
                    .items_center()
                    .flex_wrap()
                    .child(
--- a/crates/agent/src/assistant_model_selector.rs
+++ b/crates/agent/src/assistant_model_selector.rs
@@ -17,13 +17,13 @@ pub enum ModelType {
    InlineAssistant,
 }

-pub struct AssistantModelSelector {
+pub struct AgentModelSelector {
    selector: Entity<LanguageModelSelector>,
    menu_handle: PopoverMenuHandle<LanguageModelSelector>,
    focus_handle: FocusHandle,
 }

-impl AssistantModelSelector {
+impl AgentModelSelector {
    pub(crate) fn new(
        fs: Arc<dyn Fs>,
        menu_handle: PopoverMenuHandle<LanguageModelSelector>,
@@ -99,7 +99,7 @@ impl AssistantModelSelector {
    }
 }

-impl Render for AssistantModelSelector {
+impl Render for AgentModelSelector {
    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
        let focus_handle = self.focus_handle.clone();

--- a/crates/agent/src/assistant_panel.rs
+++ b/crates/agent/src/assistant_panel.rs
--- a/crates/agent/src/assistant.rs
+++ b/crates/agent/src/assistant.rs
@@ -1,159 +0,0 @@
-mod active_thread;
-mod agent_diff;
-mod assistant_configuration;
-mod assistant_model_selector;
-mod assistant_panel;
-mod buffer_codegen;
-mod context;
-mod context_picker;
-mod context_server_configuration;
-mod context_server_tool;
-mod context_store;
-mod context_strip;
-mod debug;
-mod history_store;
-mod inline_assistant;
-mod inline_prompt_editor;
-mod message_editor;
-mod profile_selector;
-mod terminal_codegen;
-mod terminal_inline_assistant;
-mod thread;
-mod thread_history;
-mod thread_store;
-mod tool_compatibility;
-mod tool_use;
-mod ui;
-
-use std::sync::Arc;
-
-use assistant_settings::{AgentProfileId, AssistantSettings};
-use client::Client;
-use command_palette_hooks::CommandPaletteFilter;
-use feature_flags::{Assistant2FeatureFlag, FeatureFlagAppExt};
-use fs::Fs;
-use gpui::{App, actions, impl_actions};
-use language::LanguageRegistry;
-use prompt_store::PromptBuilder;
-use schemars::JsonSchema;
-use serde::Deserialize;
-use settings::Settings as _;
-use thread::ThreadId;
-
-pub use crate::active_thread::ActiveThread;
-use crate::assistant_configuration::{AddContextServerModal, ManageProfilesModal};
-pub use crate::assistant_panel::{AssistantPanel, ConcreteAssistantPanelDelegate};
-pub use crate::context::{ContextLoadResult, LoadedContext};
-pub use crate::inline_assistant::InlineAssistant;
-pub use crate::thread::{Message, MessageSegment, Thread, ThreadEvent};
-pub use crate::thread_store::ThreadStore;
-pub use agent_diff::{AgentDiffPane, AgentDiffToolbar};
-pub use context_store::ContextStore;
-pub use ui::preview::{all_agent_previews, get_agent_preview};
-
-actions!(
-    agent,
-    [
-        NewTextThread,
-        ToggleContextPicker,
-        ToggleNavigationMenu,
-        ToggleOptionsMenu,
-        DeleteRecentlyOpenThread,
-        ToggleProfileSelector,
-        RemoveAllContext,
-        ExpandMessageEditor,
-        OpenHistory,
-        AddContextServer,
-        RemoveSelectedThread,
-        Chat,
-        CycleNextInlineAssist,
-        CyclePreviousInlineAssist,
-        FocusUp,
-        FocusDown,
-        FocusLeft,
-        FocusRight,
-        RemoveFocusedContext,
-        AcceptSuggestedContext,
-        OpenActiveThreadAsMarkdown,
-        OpenAgentDiff,
-        Keep,
-        Reject,
-        RejectAll,
-        KeepAll,
-        Follow
-    ]
-);
-
-#[derive(Default, Clone, PartialEq, Deserialize, JsonSchema)]
-pub struct NewThread {
-    #[serde(default)]
-    from_thread_id: Option<ThreadId>,
-}
-
-#[derive(PartialEq, Clone, Default, Debug, Deserialize, JsonSchema)]
-pub struct ManageProfiles {
-    #[serde(default)]
-    pub customize_tools: Option<AgentProfileId>,
-}
-
-impl ManageProfiles {
-    pub fn customize_tools(profile_id: AgentProfileId) -> Self {
-        Self {
-            customize_tools: Some(profile_id),
-        }
-    }
-}
-
-impl_actions!(agent, [NewThread, ManageProfiles]);
-
-const NAMESPACE: &str = "agent";
-
-/// Initializes the `agent` crate.
-pub fn init(
-    fs: Arc<dyn Fs>,
-    client: Arc<Client>,
-    prompt_builder: Arc<PromptBuilder>,
-    language_registry: Arc<LanguageRegistry>,
-    cx: &mut App,
-) {
-    AssistantSettings::register(cx);
-    thread_store::init(cx);
-    assistant_panel::init(cx);
-    context_server_configuration::init(language_registry, cx);
-
-    inline_assistant::init(
-        fs.clone(),
-        prompt_builder.clone(),
-        client.telemetry().clone(),
-        cx,
-    );
-    terminal_inline_assistant::init(
-        fs.clone(),
-        prompt_builder.clone(),
-        client.telemetry().clone(),
-        cx,
-    );
-    cx.observe_new(AddContextServerModal::register).detach();
-    cx.observe_new(ManageProfilesModal::register).detach();
-
-    feature_gate_agent_actions(cx);
-}
-
-fn feature_gate_agent_actions(cx: &mut App) {
-    CommandPaletteFilter::update_global(cx, |filter, _cx| {
-        filter.hide_namespace(NAMESPACE);
-    });
-
-    cx.observe_flag::<Assistant2FeatureFlag, _>(move |is_enabled, cx| {
-        if is_enabled {
-            CommandPaletteFilter::update_global(cx, |filter, _cx| {
-                filter.show_namespace(NAMESPACE);
-            });
-        } else {
-            CommandPaletteFilter::update_global(cx, |filter, _cx| {
-                filter.hide_namespace(NAMESPACE);
-            });
-        }
-    })
-    .detach();
-}
--- a/crates/agent/src/buffer_codegen.rs
+++ b/crates/agent/src/buffer_codegen.rs
@@ -2,6 +2,7 @@ use crate::context::ContextLoadResult;
 use crate::inline_prompt_editor::CodegenStatus;
 use crate::{context::load_context, context_store::ContextStore};
 use anyhow::Result;
+use assistant_settings::AssistantSettings;
 use client::telemetry::Telemetry;
 use collections::HashSet;
 use editor::{Anchor, AnchorRangeExt, MultiBuffer, MultiBufferSnapshot, ToOffset as _, ToPoint};
@@ -383,7 +384,7 @@ impl CodegenAlternative {
            if user_prompt.trim().to_lowercase() == "delete" {
                async { Ok(LanguageModelTextStream::default()) }.boxed_local()
            } else {
-                let request = self.build_request(user_prompt, cx)?;
+                let request = self.build_request(&model, user_prompt, cx)?;
                cx.spawn(async move |_, cx| model.stream_completion_text(request.await, &cx).await)
                    .boxed_local()
            };
@@ -393,6 +394,7 @@ impl CodegenAlternative {

    fn build_request(
        &self,
+        model: &Arc<dyn LanguageModel>,
        user_prompt: String,
        cx: &mut App,
    ) -> Result<Task<LanguageModelRequest>> {
@@ -441,6 +443,8 @@ impl CodegenAlternative {
            }
        });

+        let temperature = AssistantSettings::temperature_for_model(&model, cx);
+
        Ok(cx.spawn(async move |_cx| {
            let mut request_message = LanguageModelRequestMessage {
                role: Role::User,
@@ -462,8 +466,9 @@ impl CodegenAlternative {
                prompt_id: None,
                mode: None,
                tools: Vec::new(),
+                tool_choice: None,
                stop: Vec::new(),
-                temperature: None,
+                temperature,
                messages: vec![request_message],
            }
        }))
@@ -772,7 +777,7 @@ impl CodegenAlternative {
        cx: &mut Context<CodegenAlternative>,
    ) {
        let transaction = self.buffer.update(cx, |buffer, cx| {
-            // Avoid grouping assistant edits with user edits.
+            // Avoid grouping agent edits with user edits.
            buffer.finalize_last_transaction(cx);
            buffer.start_transaction(cx);
            buffer.edit(edits, None, cx);
@@ -781,7 +786,7 @@ impl CodegenAlternative {

        if let Some(transaction) = transaction {
            if let Some(first_transaction) = self.transformation_transaction_id {
-                // Group all assistant edits into the first transaction.
+                // Group all agent edits into the first transaction.
                self.buffer.update(cx, |buffer, cx| {
                    buffer.merge_transactions(transaction, first_transaction, cx)
                });
--- a/crates/agent/src/context.rs
+++ b/crates/agent/src/context.rs
@@ -3,6 +3,7 @@ use std::hash::{Hash, Hasher};
 use std::path::PathBuf;
 use std::{ops::Range, path::Path, sync::Arc};

+use assistant_context_editor::AssistantContext;
 use assistant_tool::outline;
 use collections::{HashMap, HashSet};
 use editor::display_map::CreaseId;
@@ -33,6 +34,7 @@ pub enum ContextKind {
    Selection,
    FetchedUrl,
    Thread,
+    TextThread,
    Rules,
    Image,
 }
@@ -46,6 +48,7 @@ impl ContextKind {
            ContextKind::Selection => IconName::Context,
            ContextKind::FetchedUrl => IconName::Globe,
            ContextKind::Thread => IconName::MessageBubbles,
+            ContextKind::TextThread => IconName::MessageBubbles,
            ContextKind::Rules => RULES_ICON,
            ContextKind::Image => IconName::Image,
        }
@@ -65,6 +68,7 @@ pub enum AgentContextHandle {
    Selection(SelectionContextHandle),
    FetchedUrl(FetchedUrlContext),
    Thread(ThreadContextHandle),
+    TextThread(TextThreadContextHandle),
    Rules(RulesContextHandle),
    Image(ImageContext),
 }
@@ -78,6 +82,7 @@ impl AgentContextHandle {
            Self::Selection(context) => context.context_id,
            Self::FetchedUrl(context) => context.context_id,
            Self::Thread(context) => context.context_id,
+            Self::TextThread(context) => context.context_id,
            Self::Rules(context) => context.context_id,
            Self::Image(context) => context.context_id,
        }
@@ -98,6 +103,7 @@ pub enum AgentContext {
    Selection(SelectionContext),
    FetchedUrl(FetchedUrlContext),
    Thread(ThreadContext),
+    TextThread(TextThreadContext),
    Rules(RulesContext),
    Image(ImageContext),
 }
@@ -115,6 +121,9 @@ impl AgentContext {
            }
            AgentContext::FetchedUrl(context) => AgentContextHandle::FetchedUrl(context.clone()),
            AgentContext::Thread(context) => AgentContextHandle::Thread(context.handle.clone()),
+            AgentContext::TextThread(context) => {
+                AgentContextHandle::TextThread(context.handle.clone())
+            }
            AgentContext::Rules(context) => AgentContextHandle::Rules(context.handle.clone()),
            AgentContext::Image(context) => AgentContextHandle::Image(context.clone()),
        }
@@ -609,6 +618,54 @@ impl Display for ThreadContext {
    }
 }

+#[derive(Debug, Clone)]
+pub struct TextThreadContextHandle {
+    pub context: Entity<AssistantContext>,
+    pub context_id: ContextId,
+}
+
+#[derive(Debug, Clone)]
+pub struct TextThreadContext {
+    pub handle: TextThreadContextHandle,
+    pub title: SharedString,
+    pub text: SharedString,
+}
+
+impl TextThreadContextHandle {
+    // pub fn lookup_key() ->
+    pub fn eq_for_key(&self, other: &Self) -> bool {
+        self.context == other.context
+    }
+
+    pub fn hash_for_key<H: Hasher>(&self, state: &mut H) {
+        self.context.hash(state)
+    }
+
+    pub fn title(&self, cx: &App) -> SharedString {
+        self.context.read(cx).summary_or_default()
+    }
+
+    fn load(self, cx: &App) -> Task<Option<(AgentContext, Vec<Entity<Buffer>>)>> {
+        let title = self.title(cx);
+        let text = self.context.read(cx).to_xml(cx);
+        let context = AgentContext::TextThread(TextThreadContext {
+            title,
+            text: text.into(),
+            handle: self,
+        });
+        Task::ready(Some((context, vec![])))
+    }
+}
+
+impl Display for TextThreadContext {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        // TODO: escape title?
+        write!(f, "<text_thread title=\"{}\">\n", self.title)?;
+        write!(f, "{}", self.text.trim())?;
+        write!(f, "\n</text_thread>")
+    }
+}
+
 #[derive(Debug, Clone)]
 pub struct RulesContextHandle {
    pub prompt_id: UserPromptId,
@@ -785,6 +842,7 @@ pub fn load_context(
            AgentContextHandle::Selection(context) => load_tasks.push(context.load(cx)),
            AgentContextHandle::FetchedUrl(context) => load_tasks.push(context.load()),
            AgentContextHandle::Thread(context) => load_tasks.push(context.load(cx)),
+            AgentContextHandle::TextThread(context) => load_tasks.push(context.load(cx)),
            AgentContextHandle::Rules(context) => load_tasks.push(context.load(prompt_store, cx)),
            AgentContextHandle::Image(context) => load_tasks.push(context.load(cx)),
        }
@@ -810,6 +868,7 @@ pub fn load_context(
        let mut selection_context = Vec::new();
        let mut fetched_url_context = Vec::new();
        let mut thread_context = Vec::new();
+        let mut text_thread_context = Vec::new();
        let mut rules_context = Vec::new();
        let mut images = Vec::new();
        for context in &contexts {
@@ -820,17 +879,21 @@ pub fn load_context(
                AgentContext::Selection(context) => selection_context.push(context),
                AgentContext::FetchedUrl(context) => fetched_url_context.push(context),
                AgentContext::Thread(context) => thread_context.push(context),
+                AgentContext::TextThread(context) => text_thread_context.push(context),
                AgentContext::Rules(context) => rules_context.push(context),
                AgentContext::Image(context) => images.extend(context.image()),
            }
        }

+        // Use empty text if there are no contexts that contribute to text (everything but image
+        // context).
        if file_context.is_empty()
            && directory_context.is_empty()
            && symbol_context.is_empty()
            && selection_context.is_empty()
            && fetched_url_context.is_empty()
            && thread_context.is_empty()
+            && text_thread_context.is_empty()
            && rules_context.is_empty()
        {
            return ContextLoadResult {
@@ -903,6 +966,15 @@ pub fn load_context(
            text.push_str("</conversation_threads>\n");
        }

+        if !text_thread_context.is_empty() {
+            text.push_str("<text_threads>");
+            for context in text_thread_context {
+                text.push('\n');
+                let _ = writeln!(text, "{context}");
+            }
+            text.push_str("<text_threads>");
+        }
+
        if !rules_context.is_empty() {
            text.push_str(
                "<user_rules>\n\
@@ -1019,6 +1091,11 @@ impl PartialEq for AgentContextKey {
                    return context.eq_for_key(other_context);
                }
            }
+            AgentContextHandle::TextThread(context) => {
+                if let AgentContextHandle::TextThread(other_context) = &other.0 {
+                    return context.eq_for_key(other_context);
+                }
+            }
        }
        false
    }
@@ -1033,6 +1110,7 @@ impl Hash for AgentContextKey {
            AgentContextHandle::Selection(context) => context.hash_for_key(state),
            AgentContextHandle::FetchedUrl(context) => context.hash_for_key(state),
            AgentContextHandle::Thread(context) => context.hash_for_key(state),
+            AgentContextHandle::TextThread(context) => context.hash_for_key(state),
            AgentContextHandle::Rules(context) => context.hash_for_key(state),
            AgentContextHandle::Image(context) => context.hash_for_key(state),
        }
--- a/crates/agent/src/context_picker.rs
+++ b/crates/agent/src/context_picker.rs
@@ -6,7 +6,7 @@ mod symbol_context_picker;
 mod thread_context_picker;

 use std::ops::Range;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use std::sync::Arc;

 use anyhow::{Result, anyhow};
@@ -22,22 +22,25 @@ use gpui::{
 };
 use language::Buffer;
 use multi_buffer::MultiBufferRow;
+use paths::contexts_dir;
 use project::{Entry, ProjectPath};
 use prompt_store::{PromptStore, UserPromptId};
 use rules_context_picker::{RulesContextEntry, RulesContextPicker};
 use symbol_context_picker::SymbolContextPicker;
-use thread_context_picker::{ThreadContextEntry, ThreadContextPicker, render_thread_context_entry};
+use thread_context_picker::{
+    ThreadContextEntry, ThreadContextPicker, render_thread_context_entry, unordered_thread_entries,
+};
 use ui::{
    ButtonLike, ContextMenu, ContextMenuEntry, ContextMenuItem, Disclosure, TintColor, prelude::*,
 };
 use uuid::Uuid;
 use workspace::{Workspace, notifications::NotifyResultExt};

-use crate::AssistantPanel;
+use crate::AgentPanel;
 use crate::context::RULES_ICON;
 use crate::context_store::ContextStore;
 use crate::thread::ThreadId;
-use crate::thread_store::ThreadStore;
+use crate::thread_store::{TextThreadStore, ThreadStore};

 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 enum ContextPickerEntry {
@@ -164,6 +167,7 @@ pub(super) struct ContextPicker {
    workspace: WeakEntity<Workspace>,
    context_store: WeakEntity<ContextStore>,
    thread_store: Option<WeakEntity<ThreadStore>>,
+    text_thread_store: Option<WeakEntity<TextThreadStore>>,
    prompt_store: Option<Entity<PromptStore>>,
    _subscriptions: Vec<Subscription>,
 }
@@ -172,6 +176,7 @@ impl ContextPicker {
    pub fn new(
        workspace: WeakEntity<Workspace>,
        thread_store: Option<WeakEntity<ThreadStore>>,
+        text_thread_store: Option<WeakEntity<TextThreadStore>>,
        context_store: WeakEntity<ContextStore>,
        window: &mut Window,
        cx: &mut Context<Self>,
@@ -208,6 +213,7 @@ impl ContextPicker {
            workspace,
            context_store,
            thread_store,
+            text_thread_store,
            prompt_store,
            _subscriptions: subscriptions,
        }
@@ -340,10 +346,15 @@ impl ContextPicker {
                    }));
                }
                ContextPickerMode::Thread => {
-                    if let Some(thread_store) = self.thread_store.as_ref() {
+                    if let Some((thread_store, text_thread_store)) = self
+                        .thread_store
+                        .as_ref()
+                        .zip(self.text_thread_store.as_ref())
+                    {
                        self.mode = ContextPickerState::Thread(cx.new(|cx| {
                            ThreadContextPicker::new(
                                thread_store.clone(),
+                                text_thread_store.clone(),
                                context_picker.clone(),
                                self.context_store.clone(),
                                window,
@@ -414,9 +425,9 @@ impl ContextPicker {
                        render_thread_context_entry(&view_thread, context_store.clone(), cx)
                            .into_any()
                    },
-                    move |_window, cx| {
+                    move |window, cx| {
                        context_picker.update(cx, |this, cx| {
-                            this.add_recent_thread(thread.clone(), cx)
+                            this.add_recent_thread(thread.clone(), window, cx)
                                .detach_and_log_err(cx);
                        })
                    },
@@ -447,30 +458,54 @@ impl ContextPicker {

    fn add_recent_thread(
        &self,
-        thread: ThreadContextEntry,
+        entry: ThreadContextEntry,
+        window: &mut Window,
        cx: &mut Context<Self>,
    ) -> Task<Result<()>> {
        let Some(context_store) = self.context_store.upgrade() else {
            return Task::ready(Err(anyhow!("context store not available")));
        };

-        let Some(thread_store) = self
-            .thread_store
-            .as_ref()
-            .and_then(|thread_store| thread_store.upgrade())
-        else {
-            return Task::ready(Err(anyhow!("thread store not available")));
-        };
+        match entry {
+            ThreadContextEntry::Thread { id, .. } => {
+                let Some(thread_store) = self
+                    .thread_store
+                    .as_ref()
+                    .and_then(|thread_store| thread_store.upgrade())
+                else {
+                    return Task::ready(Err(anyhow!("thread store not available")));
+                };

-        let open_thread_task = thread_store.update(cx, |this, cx| this.open_thread(&thread.id, cx));
-        cx.spawn(async move |this, cx| {
-            let thread = open_thread_task.await?;
-            context_store.update(cx, |context_store, cx| {
-                context_store.add_thread(thread, true, cx);
-            })?;
+                let open_thread_task =
+                    thread_store.update(cx, |this, cx| this.open_thread(&id, window, cx));
+                cx.spawn(async move |this, cx| {
+                    let thread = open_thread_task.await?;
+                    context_store.update(cx, |context_store, cx| {
+                        context_store.add_thread(thread, true, cx);
+                    })?;
+                    this.update(cx, |_this, cx| cx.notify())
+                })
+            }
+            ThreadContextEntry::Context { path, .. } => {
+                let Some(text_thread_store) = self
+                    .text_thread_store
+                    .as_ref()
+                    .and_then(|thread_store| thread_store.upgrade())
+                else {
+                    return Task::ready(Err(anyhow!("text thread store not available")));
+                };

-            this.update(cx, |_this, cx| cx.notify())
-        })
+                let task = text_thread_store
+                    .update(cx, |this, cx| this.open_local_context(path.clone(), cx));
+                cx.spawn(async move |this, cx| {
+                    let thread = task.await?;
+                    context_store.update(cx, |context_store, cx| {
+                        context_store.add_text_thread(thread, true, cx);
+                    })?;
+                    this.update(cx, |_this, cx| cx.notify())
+                })
+            }
+        }
    }

    fn recent_entries(&self, cx: &mut App) -> Vec<RecentEntry> {
@@ -485,6 +520,7 @@ impl ContextPicker {
        recent_context_picker_entries(
            context_store,
            self.thread_store.clone(),
+            self.text_thread_store.clone(),
            workspace,
            None,
            cx,
@@ -583,6 +619,7 @@ fn available_context_picker_entries(
 fn recent_context_picker_entries(
    context_store: Entity<ContextStore>,
    thread_store: Option<WeakEntity<ThreadStore>>,
+    text_thread_store: Option<WeakEntity<TextThreadStore>>,
    workspace: Entity<Workspace>,
    exclude_path: Option<ProjectPath>,
    cx: &App,
@@ -611,25 +648,35 @@ fn recent_context_picker_entries(
    let current_threads = context_store.read(cx).thread_ids();

    let active_thread_id = workspace
-        .panel::<AssistantPanel>(cx)
-        .map(|panel| panel.read(cx).active_thread(cx).read(cx).id());
+        .panel::<AgentPanel>(cx)
+        .and_then(|panel| Some(panel.read(cx).active_thread()?.read(cx).id()));
+
+    if let Some((thread_store, text_thread_store)) = thread_store
+        .and_then(|store| store.upgrade())
+        .zip(text_thread_store.and_then(|store| store.upgrade()))
+    {
+        let mut threads = unordered_thread_entries(thread_store, text_thread_store, cx)
+            .filter(|(_, thread)| match thread {
+                ThreadContextEntry::Thread { id, .. } => {
+                    Some(id) != active_thread_id && !current_threads.contains(id)
+                }
+                ThreadContextEntry::Context { .. } => true,
+            })
+            .collect::<Vec<_>>();
+
+        const RECENT_COUNT: usize = 2;
+        if threads.len() > RECENT_COUNT {
+            threads.select_nth_unstable_by_key(RECENT_COUNT - 1, |(updated_at, _)| {
+                std::cmp::Reverse(*updated_at)
+            });
+            threads.truncate(RECENT_COUNT);
+        }
+        threads.sort_unstable_by_key(|(updated_at, _)| std::cmp::Reverse(*updated_at));

-    if let Some(thread_store) = thread_store.and_then(|thread_store| thread_store.upgrade()) {
        recent.extend(
-            thread_store
-                .read(cx)
-                .reverse_chronological_threads()
+            threads
                .into_iter()
-                .filter(|thread| {
-                    Some(&thread.id) != active_thread_id && !current_threads.contains(&thread.id)
-                })
-                .take(2)
-                .map(|thread| {
-                    RecentEntry::Thread(ThreadContextEntry {
-                        id: thread.id,
-                        summary: thread.summary,
-                    })
-                }),
+                .map(|(_, thread)| RecentEntry::Thread(thread)),
        );
    }

@@ -827,6 +874,7 @@ pub enum MentionLink {
    Selection(ProjectPath, Range<usize>),
    Fetch(String),
    Thread(ThreadId),
+    TextThread(Arc<Path>),
    Rule(UserPromptId),
 }

@@ -838,6 +886,8 @@ impl MentionLink {
    const FETCH: &str = "@fetch";
    const RULE: &str = "@rule";

+    const TEXT_THREAD_URL_PREFIX: &str = "text-thread://";
+
    const SEPARATOR: &str = ":";

    pub fn is_valid(url: &str) -> bool {
@@ -877,7 +927,22 @@ impl MentionLink {
    }

    pub fn for_thread(thread: &ThreadContextEntry) -> String {
-        format!("[@{}]({}:{})", thread.summary, Self::THREAD, thread.id)
+        match thread {
+            ThreadContextEntry::Thread { id, title } => {
+                format!("[@{}]({}:{})", title, Self::THREAD, id)
+            }
+            ThreadContextEntry::Context { path, title } => {
+                let filename = path.file_name().unwrap_or_default();
+                let escaped_filename = urlencoding::encode(&filename.to_string_lossy()).to_string();
+                format!(
+                    "[@{}]({}:{}{})",
+                    title,
+                    Self::THREAD,
+                    Self::TEXT_THREAD_URL_PREFIX,
+                    escaped_filename
+                )
+            }
+        }
    }

    pub fn for_fetch(url: &str) -> String {
@@ -939,8 +1004,15 @@ impl MentionLink {
                Some(MentionLink::Selection(project_path, line_range))
            }
            Self::THREAD => {
-                let thread_id = ThreadId::from(argument);
-                Some(MentionLink::Thread(thread_id))
+                if let Some(encoded_filename) = argument.strip_prefix(Self::TEXT_THREAD_URL_PREFIX)
+                {
+                    let filename = urlencoding::decode(encoded_filename).ok()?;
+                    let path = contexts_dir().join(filename.as_ref()).into();
+                    Some(MentionLink::TextThread(path))
+                } else {
+                    let thread_id = ThreadId::from(argument);
+                    Some(MentionLink::Thread(thread_id))
+                }
            }
            Self::FETCH => Some(MentionLink::Fetch(argument.to_string())),
            Self::RULE => {
--- a/crates/agent/src/context_picker/completion_provider.rs
+++ b/crates/agent/src/context_picker/completion_provider.rs
@@ -25,7 +25,7 @@ use workspace::Workspace;
 use crate::Thread;
 use crate::context::{AgentContextHandle, AgentContextKey, ContextCreasesAddon, RULES_ICON};
 use crate::context_store::ContextStore;
-use crate::thread_store::ThreadStore;
+use crate::thread_store::{TextThreadStore, ThreadStore};

 use super::fetch_context_picker::fetch_url_content;
 use super::file_context_picker::{FileMatch, search_files};
@@ -72,6 +72,7 @@ fn search(
    recent_entries: Vec<RecentEntry>,
    prompt_store: Option<Entity<PromptStore>>,
    thread_store: Option<WeakEntity<ThreadStore>>,
+    text_thread_context_store: Option<WeakEntity<assistant_context_editor::ContextStore>>,
    workspace: Entity<Workspace>,
    cx: &mut App,
 ) -> Task<Vec<Match>> {
@@ -101,9 +102,18 @@ fn search(
        }

        Some(ContextPickerMode::Thread) => {
-            if let Some(thread_store) = thread_store.as_ref().and_then(|t| t.upgrade()) {
-                let search_threads_task =
-                    search_threads(query.clone(), cancellation_flag.clone(), thread_store, cx);
+            if let Some((thread_store, context_store)) = thread_store
+                .as_ref()
+                .and_then(|t| t.upgrade())
+                .zip(text_thread_context_store.as_ref().and_then(|t| t.upgrade()))
+            {
+                let search_threads_task = search_threads(
+                    query.clone(),
+                    cancellation_flag.clone(),
+                    thread_store,
+                    context_store,
+                    cx,
+                );
                cx.background_spawn(async move {
                    search_threads_task
                        .await
@@ -236,6 +246,7 @@ pub struct ContextPickerCompletionProvider {
    workspace: WeakEntity<Workspace>,
    context_store: WeakEntity<ContextStore>,
    thread_store: Option<WeakEntity<ThreadStore>>,
+    text_thread_store: Option<WeakEntity<TextThreadStore>>,
    editor: WeakEntity<Editor>,
    excluded_buffer: Option<WeakEntity<Buffer>>,
 }
@@ -245,6 +256,7 @@ impl ContextPickerCompletionProvider {
        workspace: WeakEntity<Workspace>,
        context_store: WeakEntity<ContextStore>,
        thread_store: Option<WeakEntity<ThreadStore>>,
+        text_thread_store: Option<WeakEntity<TextThreadStore>>,
        editor: WeakEntity<Editor>,
        exclude_buffer: Option<WeakEntity<Buffer>>,
    ) -> Self {
@@ -252,6 +264,7 @@ impl ContextPickerCompletionProvider {
            workspace,
            context_store,
            thread_store,
+            text_thread_store,
            editor,
            excluded_buffer: exclude_buffer,
        }
@@ -400,6 +413,7 @@ impl ContextPickerCompletionProvider {
        editor: Entity<Editor>,
        context_store: Entity<ContextStore>,
        thread_store: Entity<ThreadStore>,
+        text_thread_store: Entity<TextThreadStore>,
    ) -> Completion {
        let icon_for_completion = if recent {
            IconName::HistoryRerun
@@ -411,38 +425,58 @@ impl ContextPickerCompletionProvider {
        Completion {
            replace_range: source_range.clone(),
            new_text,
-            label: CodeLabel::plain(thread_entry.summary.to_string(), None),
+            label: CodeLabel::plain(thread_entry.title().to_string(), None),
            documentation: None,
            insert_text_mode: None,
            source: project::CompletionSource::Custom,
            icon_path: Some(icon_for_completion.path().into()),
            confirm: Some(confirm_completion_callback(
                IconName::MessageBubbles.path().into(),
-                thread_entry.summary.clone(),
+                thread_entry.title().clone(),
                excerpt_id,
                source_range.start,
                new_text_len,
                editor.clone(),
                context_store.clone(),
-                move |cx| {
-                    let thread_id = thread_entry.id.clone();
-                    let context_store = context_store.clone();
-                    let thread_store = thread_store.clone();
-                    cx.spawn::<_, Option<_>>(async move |cx| {
-                        let thread: Entity<Thread> = thread_store
-                            .update(cx, |thread_store, cx| {
-                                thread_store.open_thread(&thread_id, cx)
-                            })
-                            .ok()?
-                            .await
-                            .log_err()?;
-                        let context = context_store
-                            .update(cx, |context_store, cx| {
-                                context_store.add_thread(thread, false, cx)
-                            })
-                            .ok()??;
-                        Some(context)
-                    })
+                move |window, cx| match &thread_entry {
+                    ThreadContextEntry::Thread { id, .. } => {
+                        let thread_id = id.clone();
+                        let context_store = context_store.clone();
+                        let thread_store = thread_store.clone();
+                        window.spawn::<_, Option<_>>(cx, async move |cx| {
+                            let thread: Entity<Thread> = thread_store
+                                .update_in(cx, |thread_store, window, cx| {
+                                    thread_store.open_thread(&thread_id, window, cx)
+                                })
+                                .ok()?
+                                .await
+                                .log_err()?;
+                            let context = context_store
+                                .update(cx, |context_store, cx| {
+                                    context_store.add_thread(thread, false, cx)
+                                })
+                                .ok()??;
+                            Some(context)
+                        })
+                    }
+                    ThreadContextEntry::Context { path, .. } => {
+                        let path = path.clone();
+                        let context_store = context_store.clone();
+                        let text_thread_store = text_thread_store.clone();
+                        cx.spawn::<_, Option<_>>(async move |cx| {
+                            let thread = text_thread_store
+                                .update(cx, |store, cx| store.open_local_context(path, cx))
+                                .ok()?
+                                .await
+                                .log_err()?;
+                            let context = context_store
+                                .update(cx, |context_store, cx| {
+                                    context_store.add_text_thread(thread, false, cx)
+                                })
+                                .ok()??;
+                            Some(context)
+                        })
+                    }
                },
            )),
        }
@@ -473,7 +507,7 @@ impl ContextPickerCompletionProvider {
                new_text_len,
                editor.clone(),
                context_store.clone(),
-                move |cx| {
+                move |_, cx| {
                    let user_prompt_id = rules.prompt_id;
                    let context = context_store.update(cx, |context_store, cx| {
                        context_store.add_rules(user_prompt_id, false, cx)
@@ -510,7 +544,7 @@ impl ContextPickerCompletionProvider {
                new_text_len,
                editor.clone(),
                context_store.clone(),
-                move |cx| {
+                move |_, cx| {
                    let context_store = context_store.clone();
                    let http_client = http_client.clone();
                    let url_to_fetch = url_to_fetch.clone();
@@ -595,7 +629,7 @@ impl ContextPickerCompletionProvider {
                new_text_len,
                editor,
                context_store.clone(),
-                move |cx| {
+                move |_, cx| {
                    if is_directory {
                        Task::ready(
                            context_store
@@ -666,7 +700,7 @@ impl ContextPickerCompletionProvider {
                new_text_len,
                editor.clone(),
                context_store.clone(),
-                move |cx| {
+                move |_, cx| {
                    let symbol = symbol.clone();
                    let context_store = context_store.clone();
                    let workspace = workspace.clone();
@@ -733,6 +767,7 @@ impl CompletionProvider for ContextPickerCompletionProvider {
            ..snapshot.anchor_before(state.source_range.end);

        let thread_store = self.thread_store.clone();
+        let text_thread_store = self.text_thread_store.clone();
        let editor = self.editor.clone();
        let http_client = workspace.read(cx).client().http_client();

@@ -749,6 +784,7 @@ impl CompletionProvider for ContextPickerCompletionProvider {
        let recent_entries = recent_context_picker_entries(
            context_store.clone(),
            thread_store.clone(),
+            text_thread_store.clone(),
            workspace.clone(),
            excluded_path.clone(),
            cx,
@@ -768,6 +804,7 @@ impl CompletionProvider for ContextPickerCompletionProvider {
            recent_entries,
            prompt_store,
            thread_store.clone(),
+            text_thread_store.clone(),
            workspace.clone(),
            cx,
        );
@@ -819,6 +856,8 @@ impl CompletionProvider for ContextPickerCompletionProvider {
                            thread, is_recent, ..
                        }) => {
                            let thread_store = thread_store.as_ref().and_then(|t| t.upgrade())?;
+                            let text_thread_store =
+                                text_thread_store.as_ref().and_then(|t| t.upgrade())?;
                            Some(Self::completion_for_thread(
                                thread,
                                excerpt_id,
@@ -827,6 +866,7 @@ impl CompletionProvider for ContextPickerCompletionProvider {
                                editor.clone(),
                                context_store.clone(),
                                thread_store,
+                                text_thread_store,
                            ))
                        }

@@ -914,10 +954,13 @@ fn confirm_completion_callback(
    content_len: usize,
    editor: Entity<Editor>,
    context_store: Entity<ContextStore>,
-    add_context_fn: impl Fn(&mut App) -> Task<Option<AgentContextHandle>> + Send + Sync + 'static,
+    add_context_fn: impl Fn(&mut Window, &mut App) -> Task<Option<AgentContextHandle>>
+    + Send
+    + Sync
+    + 'static,
 ) -> Arc<dyn Fn(CompletionIntent, &mut Window, &mut App) -> bool + Send + Sync> {
    Arc::new(move |_, window, cx| {
-        let context = add_context_fn(cx);
+        let context = add_context_fn(window, cx);

        let crease_text = crease_text.clone();
        let crease_icon_path = crease_icon_path.clone();
@@ -1247,6 +1290,7 @@ mod tests {
                workspace.downgrade(),
                context_store.downgrade(),
                None,
+                None,
                editor_entity,
                last_opened_buffer,
            ))));
--- a/crates/agent/src/context_picker/thread_context_picker.rs
+++ b/crates/agent/src/context_picker/thread_context_picker.rs
@@ -1,6 +1,8 @@
+use std::path::Path;
 use std::sync::Arc;
 use std::sync::atomic::AtomicBool;

+use chrono::{DateTime, Utc};
 use fuzzy::StringMatchCandidate;
 use gpui::{App, DismissEvent, Entity, FocusHandle, Focusable, Task, WeakEntity};
 use picker::{Picker, PickerDelegate};
@@ -9,7 +11,7 @@ use ui::{ListItem, prelude::*};
 use crate::context_picker::ContextPicker;
 use crate::context_store::{self, ContextStore};
 use crate::thread::ThreadId;
-use crate::thread_store::ThreadStore;
+use crate::thread_store::{TextThreadStore, ThreadStore};

 pub struct ThreadContextPicker {
    picker: Entity<Picker<ThreadContextPickerDelegate>>,
@@ -18,13 +20,18 @@ pub struct ThreadContextPicker {
 impl ThreadContextPicker {
    pub fn new(
        thread_store: WeakEntity<ThreadStore>,
+        text_thread_context_store: WeakEntity<TextThreadStore>,
        context_picker: WeakEntity<ContextPicker>,
        context_store: WeakEntity<context_store::ContextStore>,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) -> Self {
-        let delegate =
-            ThreadContextPickerDelegate::new(thread_store, context_picker, context_store);
+        let delegate = ThreadContextPickerDelegate::new(
+            thread_store,
+            text_thread_context_store,
+            context_picker,
+            context_store,
+        );
        let picker = cx.new(|cx| Picker::uniform_list(delegate, window, cx));

        ThreadContextPicker { picker }
@@ -44,13 +51,29 @@ impl Render for ThreadContextPicker {
 }

 #[derive(Debug, Clone)]
-pub struct ThreadContextEntry {
-    pub id: ThreadId,
-    pub summary: SharedString,
+pub enum ThreadContextEntry {
+    Thread {
+        id: ThreadId,
+        title: SharedString,
+    },
+    Context {
+        path: Arc<Path>,
+        title: SharedString,
+    },
+}
+
+impl ThreadContextEntry {
+    pub fn title(&self) -> &SharedString {
+        match self {
+            Self::Thread { title, .. } => title,
+            Self::Context { title, .. } => title,
+        }
+    }
 }

 pub struct ThreadContextPickerDelegate {
    thread_store: WeakEntity<ThreadStore>,
+    text_thread_store: WeakEntity<TextThreadStore>,
    context_picker: WeakEntity<ContextPicker>,
    context_store: WeakEntity<context_store::ContextStore>,
    matches: Vec<ThreadContextEntry>,
@@ -60,6 +83,7 @@ pub struct ThreadContextPickerDelegate {
 impl ThreadContextPickerDelegate {
    pub fn new(
        thread_store: WeakEntity<ThreadStore>,
+        text_thread_store: WeakEntity<TextThreadStore>,
        context_picker: WeakEntity<ContextPicker>,
        context_store: WeakEntity<context_store::ContextStore>,
    ) -> Self {
@@ -67,6 +91,7 @@ impl ThreadContextPickerDelegate {
            thread_store,
            context_picker,
            context_store,
+            text_thread_store,
            matches: Vec::new(),
            selected_index: 0,
        }
@@ -103,11 +128,21 @@ impl PickerDelegate for ThreadContextPickerDelegate {
        window: &mut Window,
        cx: &mut Context<Picker<Self>>,
    ) -> Task<()> {
-        let Some(thread_store) = self.thread_store.upgrade() else {
+        let Some((thread_store, text_thread_context_store)) = self
+            .thread_store
+            .upgrade()
+            .zip(self.text_thread_store.upgrade())
+        else {
            return Task::ready(());
        };

-        let search_task = search_threads(query, Arc::new(AtomicBool::default()), thread_store, cx);
+        let search_task = search_threads(
+            query,
+            Arc::new(AtomicBool::default()),
+            thread_store,
+            text_thread_context_store,
+            cx,
+        );
        cx.spawn_in(window, async move |this, cx| {
            let matches = search_task.await;
            this.update(cx, |this, cx| {
@@ -119,29 +154,53 @@ impl PickerDelegate for ThreadContextPickerDelegate {
        })
    }

-    fn confirm(&mut self, _secondary: bool, _window: &mut Window, cx: &mut Context<Picker<Self>>) {
+    fn confirm(&mut self, _secondary: bool, window: &mut Window, cx: &mut Context<Picker<Self>>) {
        let Some(entry) = self.matches.get(self.selected_index) else {
            return;
        };

-        let Some(thread_store) = self.thread_store.upgrade() else {
-            return;
-        };
+        match entry {
+            ThreadContextEntry::Thread { id, .. } => {
+                let Some(thread_store) = self.thread_store.upgrade() else {
+                    return;
+                };
+                let open_thread_task =
+                    thread_store.update(cx, |this, cx| this.open_thread(&id, window, cx));

-        let open_thread_task = thread_store.update(cx, |this, cx| this.open_thread(&entry.id, cx));
-
-        cx.spawn(async move |this, cx| {
-            let thread = open_thread_task.await?;
-            this.update(cx, |this, cx| {
-                this.delegate
-                    .context_store
-                    .update(cx, |context_store, cx| {
-                        context_store.add_thread(thread, true, cx)
+                cx.spawn(async move |this, cx| {
+                    let thread = open_thread_task.await?;
+                    this.update(cx, |this, cx| {
+                        this.delegate
+                            .context_store
+                            .update(cx, |context_store, cx| {
+                                context_store.add_thread(thread, true, cx)
+                            })
+                            .ok();
                    })
-                    .ok();
-            })
-        })
-        .detach_and_log_err(cx);
+                })
+                .detach_and_log_err(cx);
+            }
+            ThreadContextEntry::Context { path, .. } => {
+                let Some(text_thread_store) = self.text_thread_store.upgrade() else {
+                    return;
+                };
+                let task = text_thread_store
+                    .update(cx, |this, cx| this.open_local_context(path.clone(), cx));
+
+                cx.spawn(async move |this, cx| {
+                    let thread = task.await?;
+                    this.update(cx, |this, cx| {
+                        this.delegate
+                            .context_store
+                            .update(cx, |context_store, cx| {
+                                context_store.add_text_thread(thread, true, cx)
+                            })
+                            .ok();
+                    })
+                })
+                .detach_and_log_err(cx);
+            }
+        }
    }

    fn dismissed(&mut self, _window: &mut Window, cx: &mut Context<Picker<Self>>) {
@@ -168,13 +227,20 @@ impl PickerDelegate for ThreadContextPickerDelegate {
 }

 pub fn render_thread_context_entry(
-    thread: &ThreadContextEntry,
+    entry: &ThreadContextEntry,
    context_store: WeakEntity<ContextStore>,
    cx: &mut App,
 ) -> Div {
-    let added = context_store.upgrade().map_or(false, |ctx_store| {
-        ctx_store.read(cx).includes_thread(&thread.id)
-    });
+    let is_added = match entry {
+        ThreadContextEntry::Thread { id, .. } => context_store
+            .upgrade()
+            .map_or(false, |ctx_store| ctx_store.read(cx).includes_thread(&id)),
+        ThreadContextEntry::Context { path, .. } => {
+            context_store.upgrade().map_or(false, |ctx_store| {
+                ctx_store.read(cx).includes_text_thread(path)
+            })
+        }
+    };

    h_flex()
        .gap_1p5()
@@ -189,9 +255,9 @@ pub fn render_thread_context_entry(
                        .size(IconSize::XSmall)
                        .color(Color::Muted),
                )
-                .child(Label::new(thread.summary.clone()).truncate()),
+                .child(Label::new(entry.title().clone()).truncate()),
        )
-        .when(added, |el| {
+        .when(is_added, |el| {
            el.child(
                h_flex()
                    .gap_1()
@@ -211,28 +277,54 @@ pub struct ThreadMatch {
    pub is_recent: bool,
 }

+pub fn unordered_thread_entries(
+    thread_store: Entity<ThreadStore>,
+    text_thread_store: Entity<TextThreadStore>,
+    cx: &App,
+) -> impl Iterator<Item = (DateTime<Utc>, ThreadContextEntry)> {
+    let threads = thread_store.read(cx).unordered_threads().map(|thread| {
+        (
+            thread.updated_at,
+            ThreadContextEntry::Thread {
+                id: thread.id.clone(),
+                title: thread.summary.clone(),
+            },
+        )
+    });
+
+    let text_threads = text_thread_store
+        .read(cx)
+        .unordered_contexts()
+        .map(|context| {
+            (
+                context.mtime.to_utc(),
+                ThreadContextEntry::Context {
+                    path: context.path.clone(),
+                    title: context.title.clone().into(),
+                },
+            )
+        });
+
+    threads.chain(text_threads)
+}
+
 pub(crate) fn search_threads(
    query: String,
    cancellation_flag: Arc<AtomicBool>,
    thread_store: Entity<ThreadStore>,
+    text_thread_store: Entity<TextThreadStore>,
    cx: &mut App,
 ) -> Task<Vec<ThreadMatch>> {
-    let threads = thread_store
-        .read(cx)
-        .reverse_chronological_threads()
-        .into_iter()
-        .map(|thread| ThreadContextEntry {
-            id: thread.id,
-            summary: thread.summary,
-        })
-        .collect::<Vec<_>>();
+    let mut threads =
+        unordered_thread_entries(thread_store, text_thread_store, cx).collect::<Vec<_>>();
+    threads.sort_unstable_by_key(|(updated_at, _)| std::cmp::Reverse(*updated_at));

    let executor = cx.background_executor().clone();
    cx.background_spawn(async move {
        if query.is_empty() {
            threads
                .into_iter()
-                .map(|thread| ThreadMatch {
+                .map(|(_, thread)| ThreadMatch {
                    thread,
                    is_recent: false,
                })
@@ -241,7 +333,7 @@ pub(crate) fn search_threads(
            let candidates = threads
                .iter()
                .enumerate()
-                .map(|(id, thread)| StringMatchCandidate::new(id, &thread.summary))
+                .map(|(id, (_, thread))| StringMatchCandidate::new(id, &thread.title()))
                .collect::<Vec<_>>();
            let matches = fuzzy::match_strings(
                &candidates,
@@ -256,7 +348,7 @@ pub(crate) fn search_threads(
            matches
                .into_iter()
                .map(|mat| ThreadMatch {
-                    thread: threads[mat.candidate_id].clone(),
+                    thread: threads[mat.candidate_id].1.clone(),
                    is_recent: false,
                })
                .collect()
--- a/crates/agent/src/context_server_configuration.rs
+++ b/crates/agent/src/context_server_configuration.rs
@@ -2,14 +2,15 @@ use std::sync::Arc;

 use anyhow::Context as _;
 use context_server::ContextServerId;
-use extension::ExtensionManifest;
+use extension::{ContextServerConfiguration, ExtensionManifest};
+use gpui::Task;
 use language::LanguageRegistry;
 use project::context_server_store::registry::ContextServerDescriptorRegistry;
 use ui::prelude::*;
 use util::ResultExt;
 use workspace::Workspace;

-use crate::assistant_configuration::ConfigureContextServerModal;
+use crate::agent_configuration::ConfigureContextServerModal;

 pub(crate) fn init(language_registry: Arc<LanguageRegistry>, cx: &mut App) {
    cx.observe_new(move |_: &mut Workspace, window, cx| {
@@ -54,6 +55,15 @@ pub(crate) fn init(language_registry: Arc<LanguageRegistry>, cx: &mut App) {
    .detach();
 }

+pub enum Configuration {
+    NotAvailable(ContextServerId, Option<SharedString>),
+    Required(
+        ContextServerId,
+        Option<SharedString>,
+        ContextServerConfiguration,
+    ),
+}
+
 fn show_configure_mcp_modal(
    language_registry: Arc<LanguageRegistry>,
    manifest: &Arc<ExtensionManifest>,
@@ -62,6 +72,7 @@ fn show_configure_mcp_modal(
    cx: &mut Context<'_, Workspace>,
 ) {
    let context_server_store = workspace.project().read(cx).context_server_store();
+    let repository: Option<SharedString> = manifest.repository.as_ref().map(|s| s.clone().into());

    let registry = ContextServerDescriptorRegistry::default_global(cx).read(cx);
    let worktree_store = workspace.project().read(cx).worktree_store();
@@ -69,21 +80,37 @@ fn show_configure_mcp_modal(
        .context_servers
        .keys()
        .cloned()
-        .filter_map({
+        .map({
            |key| {
-                let descriptor = registry.context_server_descriptor(&key)?;
-                Some(cx.spawn({
+                let Some(descriptor) = registry.context_server_descriptor(&key) else {
+                    return Task::ready(Configuration::NotAvailable(
+                        ContextServerId(key),
+                        repository.clone(),
+                    ));
+                };
+                cx.spawn({
+                    let repository_url = repository.clone();
                    let worktree_store = worktree_store.clone();
                    async move |_, cx| {
-                        descriptor
+                        let configuration = descriptor
                            .configuration(worktree_store.clone(), &cx)
                            .await
                            .context("Failed to resolve context server configuration")
                            .log_err()
-                            .flatten()
-                            .map(|config| (ContextServerId(key), config))
+                            .flatten();
+
+                        match configuration {
+                            Some(config) => Configuration::Required(
+                                ContextServerId(key),
+                                repository_url,
+                                config,
+                            ),
+                            None => {
+                                Configuration::NotAvailable(ContextServerId(key), repository_url)
+                            }
+                        }
                    }
-                }))
+                })
            }
        })
        .collect::<Vec<_>>();
@@ -91,22 +118,22 @@ fn show_configure_mcp_modal(
    let jsonc_language = language_registry.language_for_name("jsonc");

    cx.spawn_in(window, async move |this, cx| {
-        let descriptors = futures::future::join_all(configuration_tasks).await;
+        let configurations = futures::future::join_all(configuration_tasks).await;
        let jsonc_language = jsonc_language.await.ok();

        this.update_in(cx, |this, window, cx| {
-            let modal = ConfigureContextServerModal::new(
-                descriptors.into_iter().flatten(),
-                context_server_store,
-                jsonc_language,
-                language_registry,
-                cx.entity().downgrade(),
-                window,
-                cx,
-            );
-            if let Some(modal) = modal {
-                this.toggle_modal(window, cx, |_, _| modal);
-            }
+            let workspace = cx.entity().downgrade();
+            this.toggle_modal(window, cx, |window, cx| {
+                ConfigureContextServerModal::new(
+                    configurations.into_iter(),
+                    context_server_store,
+                    jsonc_language,
+                    language_registry,
+                    workspace,
+                    window,
+                    cx,
+                )
+            });
        })
    })
    .detach();
--- a/crates/agent/src/context_server_tool.rs
+++ b/crates/agent/src/context_server_tool.rs
@@ -4,7 +4,7 @@ use anyhow::{Result, anyhow, bail};
 use assistant_tool::{ActionLog, Tool, ToolResult, ToolSource};
 use context_server::{ContextServerId, types};
 use gpui::{AnyWindowHandle, App, Entity, Task};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::{Project, context_server_store::ContextServerStore};
 use ui::IconName;

@@ -72,9 +72,10 @@ impl Tool for ContextServerTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        _project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -115,7 +116,7 @@ impl Tool for ContextServerTool {
                        }
                    }
                }
-                Ok(result)
+                Ok(result.into())
            })
            .into()
        } else {
--- a/crates/agent/src/context_store.rs
+++ b/crates/agent/src/context_store.rs
@@ -1,8 +1,9 @@
 use std::ops::Range;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use std::sync::Arc;

 use anyhow::{Result, anyhow};
+use assistant_context_editor::AssistantContext;
 use collections::{HashSet, IndexSet};
 use futures::{self, FutureExt};
 use gpui::{App, Context, Entity, EventEmitter, Image, SharedString, Task, WeakEntity};
@@ -18,7 +19,7 @@ use crate::ThreadStore;
 use crate::context::{
    AgentContextHandle, AgentContextKey, ContextId, DirectoryContextHandle, FetchedUrlContext,
    FileContextHandle, ImageContext, RulesContextHandle, SelectionContextHandle,
-    SymbolContextHandle, ThreadContextHandle,
+    SymbolContextHandle, TextThreadContextHandle, ThreadContextHandle,
 };
 use crate::context_strip::SuggestedContext;
 use crate::thread::{MessageId, Thread, ThreadId};
@@ -29,6 +30,7 @@ pub struct ContextStore {
    next_context_id: ContextId,
    context_set: IndexSet<AgentContextKey>,
    context_thread_ids: HashSet<ThreadId>,
+    context_text_thread_paths: HashSet<Arc<Path>>,
 }

 pub enum ContextStoreEvent {
@@ -48,6 +50,7 @@ impl ContextStore {
            next_context_id: ContextId::zero(),
            context_set: IndexSet::default(),
            context_thread_ids: HashSet::default(),
+            context_text_thread_paths: HashSet::default(),
        }
    }

@@ -227,6 +230,31 @@ impl ContextStore {
        }
    }

+    pub fn add_text_thread(
+        &mut self,
+        context: Entity<AssistantContext>,
+        remove_if_exists: bool,
+        cx: &mut Context<Self>,
+    ) -> Option<AgentContextHandle> {
+        let context_id = self.next_context_id.post_inc();
+        let context = AgentContextHandle::TextThread(TextThreadContextHandle {
+            context,
+            context_id,
+        });
+
+        if let Some(existing) = self.context_set.get(AgentContextKey::ref_cast(&context)) {
+            if remove_if_exists {
+                self.remove_context(&context, cx);
+                None
+            } else {
+                Some(existing.as_ref().clone())
+            }
+        } else {
+            self.insert_context(context.clone(), cx);
+            Some(context)
+        }
+    }
+
    pub fn add_rules(
        &mut self,
        prompt_id: UserPromptId,
@@ -364,6 +392,18 @@ impl ContextStore {
                    );
                }
            }
+            SuggestedContext::TextThread { context, name: _ } => {
+                if let Some(context) = context.upgrade() {
+                    let context_id = self.next_context_id.post_inc();
+                    self.insert_context(
+                        AgentContextHandle::TextThread(TextThreadContextHandle {
+                            context,
+                            context_id,
+                        }),
+                        cx,
+                    );
+                }
+            }
        }
    }

@@ -380,6 +420,10 @@ impl ContextStore {
                    return false;
                }
            }
+            AgentContextHandle::TextThread(text_thread_context) => {
+                self.context_text_thread_paths
+                    .extend(text_thread_context.context.read(cx).path().cloned());
+            }
            _ => {}
        }
        let inserted = self.context_set.insert(AgentContextKey(context));
@@ -399,6 +443,11 @@ impl ContextStore {
                    self.context_thread_ids
                        .remove(thread_context.thread.read(cx).id());
                }
+                AgentContextHandle::TextThread(text_thread_context) => {
+                    if let Some(path) = text_thread_context.context.read(cx).path() {
+                        self.context_text_thread_paths.remove(path);
+                    }
+                }
                _ => {}
            }
            cx.emit(ContextStoreEvent::ContextRemoved(key));
@@ -468,6 +517,10 @@ impl ContextStore {
        self.context_thread_ids.contains(thread_id)
    }

+    pub fn includes_text_thread(&self, path: &Arc<Path>) -> bool {
+        self.context_text_thread_paths.contains(path)
+    }
+
    pub fn includes_user_rules(&self, prompt_id: UserPromptId) -> bool {
        self.context_set
            .contains(&RulesContextHandle::lookup_key(prompt_id))
@@ -496,6 +549,7 @@ impl ContextStore {
                | AgentContextHandle::Selection(_)
                | AgentContextHandle::FetchedUrl(_)
                | AgentContextHandle::Thread(_)
+                | AgentContextHandle::TextThread(_)
                | AgentContextHandle::Rules(_)
                | AgentContextHandle::Image(_) => None,
            })
--- a/crates/agent/src/context_strip.rs
+++ b/crates/agent/src/context_strip.rs
@@ -1,6 +1,7 @@
 use std::path::Path;
 use std::rc::Rc;

+use assistant_context_editor::AssistantContext;
 use collections::HashSet;
 use editor::Editor;
 use file_icons::FileIcons;
@@ -18,10 +19,10 @@ use crate::context::{AgentContextHandle, ContextKind};
 use crate::context_picker::ContextPicker;
 use crate::context_store::ContextStore;
 use crate::thread::Thread;
-use crate::thread_store::ThreadStore;
+use crate::thread_store::{TextThreadStore, ThreadStore};
 use crate::ui::{AddedContext, ContextPill};
 use crate::{
-    AcceptSuggestedContext, AssistantPanel, FocusDown, FocusLeft, FocusRight, FocusUp,
+    AcceptSuggestedContext, AgentPanel, FocusDown, FocusLeft, FocusRight, FocusUp,
    RemoveAllContext, RemoveFocusedContext, ToggleContextPicker,
 };

@@ -43,6 +44,7 @@ impl ContextStrip {
        context_store: Entity<ContextStore>,
        workspace: WeakEntity<Workspace>,
        thread_store: Option<WeakEntity<ThreadStore>>,
+        text_thread_store: Option<WeakEntity<TextThreadStore>>,
        context_picker_menu_handle: PopoverMenuHandle<ContextPicker>,
        suggest_context_kind: SuggestContextKind,
        window: &mut Window,
@@ -52,6 +54,7 @@ impl ContextStrip {
            ContextPicker::new(
                workspace.clone(),
                thread_store.clone(),
+                text_thread_store,
                context_store.downgrade(),
                window,
                cx,
@@ -141,27 +144,42 @@ impl ContextStrip {
        }

        let workspace = self.workspace.upgrade()?;
-        let active_thread = workspace
-            .read(cx)
-            .panel::<AssistantPanel>(cx)?
-            .read(cx)
-            .active_thread(cx);
-        let weak_active_thread = active_thread.downgrade();
+        let panel = workspace.read(cx).panel::<AgentPanel>(cx)?.read(cx);

-        let active_thread = active_thread.read(cx);
+        if let Some(active_thread) = panel.active_thread() {
+            let weak_active_thread = active_thread.downgrade();

-        if self
-            .context_store
-            .read(cx)
-            .includes_thread(active_thread.id())
-        {
-            return None;
+            let active_thread = active_thread.read(cx);
+
+            if self
+                .context_store
+                .read(cx)
+                .includes_thread(active_thread.id())
+            {
+                return None;
+            }
+
+            Some(SuggestedContext::Thread {
+                name: active_thread.summary_or_default(),
+                thread: weak_active_thread,
+            })
+        } else if let Some(active_context_editor) = panel.active_context_editor() {
+            let context = active_context_editor.read(cx).context();
+            let weak_context = context.downgrade();
+            let context = context.read(cx);
+            let path = context.path()?;
+
+            if self.context_store.read(cx).includes_text_thread(path) {
+                return None;
+            }
+
+            Some(SuggestedContext::TextThread {
+                name: context.summary_or_default(),
+                context: weak_context,
+            })
+        } else {
+            None
        }
-
-        Some(SuggestedContext::Thread {
-            name: active_thread.summary_or_default(),
-            thread: weak_active_thread,
-        })
    }

    fn handle_context_picker_event(
@@ -538,6 +556,10 @@ pub enum SuggestedContext {
        name: SharedString,
        thread: WeakEntity<Thread>,
    },
+    TextThread {
+        name: SharedString,
+        context: WeakEntity<AssistantContext>,
+    },
 }

 impl SuggestedContext {
@@ -545,6 +567,7 @@ impl SuggestedContext {
        match self {
            Self::File { name, .. } => name,
            Self::Thread { name, .. } => name,
+            Self::TextThread { name, .. } => name,
        }
    }

@@ -552,6 +575,7 @@ impl SuggestedContext {
        match self {
            Self::File { icon_path, .. } => icon_path.clone(),
            Self::Thread { .. } => None,
+            Self::TextThread { .. } => None,
        }
    }

@@ -559,6 +583,7 @@ impl SuggestedContext {
        match self {
            Self::File { .. } => ContextKind::File,
            Self::Thread { .. } => ContextKind::Thread,
+            Self::TextThread { .. } => ContextKind::TextThread,
        }
    }
 }
--- a/crates/agent/src/history_store.rs
+++ b/crates/agent/src/history_store.rs
@@ -8,7 +8,7 @@ use gpui::{Entity, Task, prelude::*};
 use serde::{Deserialize, Serialize};
 use smol::future::FutureExt;
 use std::time::Duration;
-use ui::{App, SharedString};
+use ui::{App, SharedString, Window};
 use util::ResultExt as _;

 use crate::{
@@ -82,6 +82,7 @@ impl HistoryStore {
        thread_store: Entity<ThreadStore>,
        context_store: Entity<assistant_context_editor::ContextStore>,
        initial_recent_entries: impl IntoIterator<Item = RecentEntry>,
+        window: &mut Window,
        cx: &mut Context<Self>,
    ) -> Self {
        let subscriptions = vec![
@@ -89,55 +90,62 @@ impl HistoryStore {
            cx.observe(&context_store, |_, _, cx| cx.notify()),
        ];

-        cx.spawn({
-            let thread_store = thread_store.downgrade();
-            let context_store = context_store.downgrade();
-            async move |this, cx| {
-                let path = paths::data_dir().join(NAVIGATION_HISTORY_PATH);
-                let contents = cx
-                    .background_spawn(async move { std::fs::read_to_string(path) })
-                    .await
-                    .context("reading persisted agent panel navigation history")?;
-                let entries = serde_json::from_str::<Vec<SerializedRecentEntry>>(&contents)
-                    .context("deserializing persisted agent panel navigation history")?
-                    .into_iter()
-                    .take(MAX_RECENTLY_OPENED_ENTRIES)
-                    .map(|serialized| match serialized {
-                        SerializedRecentEntry::Thread(id) => thread_store
-                            .update(cx, |thread_store, cx| {
-                                let thread_id = ThreadId::from(id.as_str());
-                                thread_store
-                                    .open_thread(&thread_id, cx)
-                                    .map_ok(|thread| RecentEntry::Thread(thread_id, thread))
-                                    .boxed()
-                            })
-                            .unwrap_or_else(|_| async { Err(anyhow!("no thread store")) }.boxed()),
-                        SerializedRecentEntry::Context(id) => context_store
-                            .update(cx, |context_store, cx| {
-                                context_store
-                                    .open_local_context(Path::new(&id).into(), cx)
-                                    .map_ok(RecentEntry::Context)
-                                    .boxed()
-                            })
-                            .unwrap_or_else(|_| async { Err(anyhow!("no context store")) }.boxed()),
-                    });
-                let entries = join_all(entries)
-                    .await
-                    .into_iter()
-                    .filter_map(|result| result.log_err())
-                    .collect::<VecDeque<_>>();
+        window
+            .spawn(cx, {
+                let thread_store = thread_store.downgrade();
+                let context_store = context_store.downgrade();
+                let this = cx.weak_entity();
+                async move |cx| {
+                    let path = paths::data_dir().join(NAVIGATION_HISTORY_PATH);
+                    let contents = cx
+                        .background_spawn(async move { std::fs::read_to_string(path) })
+                        .await
+                        .ok()?;
+                    let entries = serde_json::from_str::<Vec<SerializedRecentEntry>>(&contents)
+                        .context("deserializing persisted agent panel navigation history")
+                        .log_err()?
+                        .into_iter()
+                        .take(MAX_RECENTLY_OPENED_ENTRIES)
+                        .map(|serialized| match serialized {
+                            SerializedRecentEntry::Thread(id) => thread_store
+                                .update_in(cx, |thread_store, window, cx| {
+                                    let thread_id = ThreadId::from(id.as_str());
+                                    thread_store
+                                        .open_thread(&thread_id, window, cx)
+                                        .map_ok(|thread| RecentEntry::Thread(thread_id, thread))
+                                        .boxed()
+                                })
+                                .unwrap_or_else(|_| {
+                                    async { Err(anyhow!("no thread store")) }.boxed()
+                                }),
+                            SerializedRecentEntry::Context(id) => context_store
+                                .update(cx, |context_store, cx| {
+                                    context_store
+                                        .open_local_context(Path::new(&id).into(), cx)
+                                        .map_ok(RecentEntry::Context)
+                                        .boxed()
+                                })
+                                .unwrap_or_else(|_| {
+                                    async { Err(anyhow!("no context store")) }.boxed()
+                                }),
+                        });
+                    let entries = join_all(entries)
+                        .await
+                        .into_iter()
+                        .filter_map(|result| result.log_err())
+                        .collect::<VecDeque<_>>();

-                this.update(cx, |this, _| {
-                    this.recently_opened_entries.extend(entries);
-                    this.recently_opened_entries
-                        .truncate(MAX_RECENTLY_OPENED_ENTRIES);
-                })
-                .ok();
+                    this.update(cx, |this, _| {
+                        this.recently_opened_entries.extend(entries);
+                        this.recently_opened_entries
+                            .truncate(MAX_RECENTLY_OPENED_ENTRIES);
+                    })
+                    .ok();

-                anyhow::Ok(())
-            }
-        })
-        .detach_and_log_err(cx);
+                    Some(())
+                }
+            })
+            .detach();

        Self {
            thread_store,
@@ -163,7 +171,10 @@ impl HistoryStore {
            history_entries.push(HistoryEntry::Thread(thread));
        }

-        for context in self.context_store.update(cx, |this, _cx| this.contexts()) {
+        for context in self
+            .context_store
+            .update(cx, |this, _cx| this.reverse_chronological_contexts())
+        {
            history_entries.push(HistoryEntry::Context(context));
        }

--- a/crates/agent/src/inline_assistant.rs
+++ b/crates/agent/src/inline_assistant.rs
@@ -8,16 +8,16 @@ use anyhow::{Context as _, Result};
 use assistant_settings::AssistantSettings;
 use client::telemetry::Telemetry;
 use collections::{HashMap, HashSet, VecDeque, hash_map};
+use editor::display_map::EditorMargins;
 use editor::{
    Anchor, AnchorRangeExt, CodeActionProvider, Editor, EditorEvent, ExcerptId, ExcerptRange,
-    GutterDimensions, MultiBuffer, MultiBufferSnapshot, ToOffset as _, ToPoint,
+    MultiBuffer, MultiBufferSnapshot, ToOffset as _, ToPoint,
    actions::SelectAll,
    display_map::{
        BlockContext, BlockPlacement, BlockProperties, BlockStyle, CustomBlockId, RenderBlock,
        ToDisplayPoint,
    },
 };
-use feature_flags::{Assistant2FeatureFlag, FeatureFlagViewExt as _};
 use fs::Fs;
 use gpui::{
    App, Context, Entity, Focusable, Global, HighlightStyle, Subscription, Task, UpdateGlobal,
@@ -43,11 +43,12 @@ use util::ResultExt;
 use workspace::{ItemHandle, Toast, Workspace, dock::Panel, notifications::NotificationId};
 use zed_actions::agent::OpenConfiguration;

-use crate::AssistantPanel;
+use crate::AgentPanel;
 use crate::buffer_codegen::{BufferCodegen, CodegenAlternative, CodegenEvent};
 use crate::context_store::ContextStore;
 use crate::inline_prompt_editor::{CodegenStatus, InlineAssistId, PromptEditor, PromptEditorEvent};
 use crate::terminal_inline_assistant::TerminalInlineAssistant;
+use crate::thread_store::TextThreadStore;
 use crate::thread_store::ThreadStore;

 pub fn init(
@@ -65,15 +66,6 @@ pub fn init(
        InlineAssistant::update_global(cx, |inline_assistant, cx| {
            inline_assistant.register_workspace(&workspace, window, cx)
        });
-
-        cx.observe_flag::<Assistant2FeatureFlag, _>(window, {
-            |is_assistant2_enabled, _workspace, _window, cx| {
-                InlineAssistant::update_global(cx, |inline_assistant, _cx| {
-                    inline_assistant.is_assistant2_enabled = is_assistant2_enabled;
-                });
-            }
-        })
-        .detach();
    })
    .detach();
 }
@@ -96,7 +88,6 @@ pub struct InlineAssistant {
    prompt_builder: Arc<PromptBuilder>,
    telemetry: Arc<Telemetry>,
    fs: Arc<dyn Fs>,
-    is_assistant2_enabled: bool,
 }

 impl Global for InlineAssistant {}
@@ -118,7 +109,6 @@ impl InlineAssistant {
            prompt_builder,
            telemetry,
            fs,
-            is_assistant2_enabled: false,
        }
    }

@@ -187,21 +177,24 @@ impl InlineAssistant {
        window: &mut Window,
        cx: &mut App,
    ) {
-        let is_assistant2_enabled = self.is_assistant2_enabled;
+        let is_assistant2_enabled = true;

        if let Some(editor) = item.act_as::<Editor>(cx) {
            editor.update(cx, |editor, cx| {
                if is_assistant2_enabled {
-                    let thread_store = workspace
-                        .read(cx)
-                        .panel::<AssistantPanel>(cx)
-                        .map(|assistant_panel| assistant_panel.read(cx).thread_store().downgrade());
+                    let panel = workspace.read(cx).panel::<AgentPanel>(cx);
+                    let thread_store = panel
+                        .as_ref()
+                        .map(|agent_panel| agent_panel.read(cx).thread_store().downgrade());
+                    let text_thread_store = panel
+                        .map(|agent_panel| agent_panel.read(cx).text_thread_store().downgrade());

                    editor.add_code_action_provider(
                        Rc::new(AssistantCodeActionProvider {
                            editor: cx.entity().downgrade(),
                            workspace: workspace.downgrade(),
                            thread_store,
+                            text_thread_store,
                        }),
                        window,
                        cx,
@@ -222,7 +215,7 @@ impl InlineAssistant {

    pub fn inline_assist(
        workspace: &mut Workspace,
-        _action: &zed_actions::assistant::InlineAssist,
+        action: &zed_actions::assistant::InlineAssist,
        window: &mut Window,
        cx: &mut Context<Workspace>,
    ) {
@@ -233,7 +226,7 @@ impl InlineAssistant {

        let Some(inline_assist_target) = Self::resolve_inline_assist_target(
            workspace,
-            workspace.panel::<AssistantPanel>(cx),
+            workspace.panel::<AgentPanel>(cx),
            window,
            cx,
        ) else {
@@ -246,13 +239,15 @@ impl InlineAssistant {
                .map_or(false, |model| model.provider.is_authenticated(cx))
        };

-        let assistant_panel = workspace
-            .panel::<AssistantPanel>(cx)
-            .map(|assistant_panel| assistant_panel.read(cx));
-        let prompt_store = assistant_panel
-            .and_then(|assistant_panel| assistant_panel.prompt_store().as_ref().cloned());
-        let thread_store =
-            assistant_panel.map(|assistant_panel| assistant_panel.thread_store().downgrade());
+        let Some(agent_panel) = workspace.panel::<AgentPanel>(cx) else {
+            return;
+        };
+        let agent_panel = agent_panel.read(cx);
+
+        let prompt_store = agent_panel.prompt_store().as_ref().cloned();
+        let thread_store = Some(agent_panel.thread_store().downgrade());
+        let text_thread_store = Some(agent_panel.text_thread_store().downgrade());
+        let context_store = agent_panel.inline_assist_context_store().clone();

        let handle_assist =
            |window: &mut Window, cx: &mut Context<Workspace>| match inline_assist_target {
@@ -261,9 +256,12 @@ impl InlineAssistant {
                        assistant.assist(
                            &active_editor,
                            cx.entity().downgrade(),
+                            context_store,
                            workspace.project().downgrade(),
                            prompt_store,
                            thread_store,
+                            text_thread_store,
+                            action.prompt.clone(),
                            window,
                            cx,
                        )
@@ -277,6 +275,8 @@ impl InlineAssistant {
                            workspace.project().downgrade(),
                            prompt_store,
                            thread_store,
+                            text_thread_store,
+                            action.prompt.clone(),
                            window,
                            cx,
                        )
@@ -329,9 +329,12 @@ impl InlineAssistant {
        &mut self,
        editor: &Entity<Editor>,
        workspace: WeakEntity<Workspace>,
+        context_store: Entity<ContextStore>,
        project: WeakEntity<Project>,
        prompt_store: Option<Entity<PromptStore>>,
        thread_store: Option<WeakEntity<ThreadStore>>,
+        text_thread_store: Option<WeakEntity<TextThreadStore>>,
+        initial_prompt: Option<String>,
        window: &mut Window,
        cx: &mut App,
    ) {
@@ -430,15 +433,17 @@ impl InlineAssistant {
        }

        let assist_group_id = self.next_assist_group_id.post_inc();
-        let prompt_buffer =
-            cx.new(|cx| MultiBuffer::singleton(cx.new(|cx| Buffer::local(String::new(), cx)), cx));
+        let prompt_buffer = cx.new(|cx| {
+            MultiBuffer::singleton(
+                cx.new(|cx| Buffer::local(initial_prompt.unwrap_or_default(), cx)),
+                cx,
+            )
+        });

        let mut assists = Vec::new();
        let mut assist_to_focus = None;
        for range in codegen_ranges {
            let assist_id = self.next_assist_id.post_inc();
-            let context_store =
-                cx.new(|_cx| ContextStore::new(project.clone(), thread_store.clone()));
            let codegen = cx.new(|cx| {
                BufferCodegen::new(
                    editor.read(cx).buffer().clone(),
@@ -453,18 +458,19 @@ impl InlineAssistant {
                )
            });

-            let gutter_dimensions = Arc::new(Mutex::new(GutterDimensions::default()));
+            let editor_margins = Arc::new(Mutex::new(EditorMargins::default()));
            let prompt_editor = cx.new(|cx| {
                PromptEditor::new_buffer(
                    assist_id,
-                    gutter_dimensions.clone(),
+                    editor_margins,
                    self.prompt_history.clone(),
                    prompt_buffer.clone(),
                    codegen.clone(),
                    self.fs.clone(),
-                    context_store,
+                    context_store.clone(),
                    workspace.clone(),
                    thread_store.clone(),
+                    text_thread_store.clone(),
                    window,
                    cx,
                )
@@ -537,6 +543,7 @@ impl InlineAssistant {
        workspace: Entity<Workspace>,
        prompt_store: Option<Entity<PromptStore>>,
        thread_store: Option<WeakEntity<ThreadStore>>,
+        text_thread_store: Option<WeakEntity<TextThreadStore>>,
        window: &mut Window,
        cx: &mut App,
    ) -> InlineAssistId {
@@ -570,11 +577,11 @@ impl InlineAssistant {
            )
        });

-        let gutter_dimensions = Arc::new(Mutex::new(GutterDimensions::default()));
+        let editor_margins = Arc::new(Mutex::new(EditorMargins::default()));
        let prompt_editor = cx.new(|cx| {
            PromptEditor::new_buffer(
                assist_id,
-                gutter_dimensions.clone(),
+                editor_margins,
                self.prompt_history.clone(),
                prompt_buffer.clone(),
                codegen.clone(),
@@ -582,6 +589,7 @@ impl InlineAssistant {
                context_store,
                workspace.downgrade(),
                thread_store,
+                text_thread_store,
                window,
                cx,
            )
@@ -642,6 +650,7 @@ impl InlineAssistant {
                height: Some(prompt_editor_height),
                render: build_assist_editor_renderer(prompt_editor),
                priority: 0,
+                render_in_minimap: false,
            },
            BlockProperties {
                style: BlockStyle::Sticky,
@@ -656,6 +665,7 @@ impl InlineAssistant {
                        .into_any_element()
                }),
                priority: 0,
+                render_in_minimap: false,
            },
        ];

@@ -1397,11 +1407,11 @@ impl InlineAssistant {

                    enum DeletedLines {}
                    let mut editor = Editor::for_multibuffer(multi_buffer, None, window, cx);
+                    editor.disable_scrollbars_and_minimap(cx);
                    editor.set_soft_wrap_mode(language::language_settings::SoftWrap::None, cx);
                    editor.set_show_wrap_guides(false, cx);
                    editor.set_show_gutter(false, cx);
                    editor.scroll_manager.set_forbid_vertical_scroll(true);
-                    editor.set_show_scrollbars(false, cx);
                    editor.set_read_only(true);
                    editor.set_show_edit_predictions(Some(false), window, cx);
                    editor.highlight_rows::<DeletedLines>(
@@ -1425,11 +1435,12 @@ impl InlineAssistant {
                            .bg(cx.theme().status().deleted_background)
                            .size_full()
                            .h(height as f32 * cx.window.line_height())
-                            .pl(cx.gutter_dimensions.full_width())
+                            .pl(cx.margins.gutter.full_width())
                            .child(deleted_lines_editor.clone())
                            .into_any_element()
                    }),
                    priority: 0,
+                    render_in_minimap: false,
                });
            }

@@ -1442,7 +1453,7 @@ impl InlineAssistant {

    fn resolve_inline_assist_target(
        workspace: &mut Workspace,
-        assistant_panel: Option<Entity<AssistantPanel>>,
+        agent_panel: Option<Entity<AgentPanel>>,
        window: &mut Window,
        cx: &mut App,
    ) -> Option<InlineAssistTarget> {
@@ -1462,7 +1473,7 @@ impl InlineAssistant {
            }
        }

-        let context_editor = assistant_panel
+        let context_editor = agent_panel
            .and_then(|panel| panel.read(cx).active_context_editor())
            .and_then(|editor| {
                let editor = &editor.read(cx).editor().clone();
@@ -1587,9 +1598,9 @@ fn build_assist_editor_renderer(editor: &Entity<PromptEditor<BufferCodegen>>) ->
    let editor = editor.clone();

    Arc::new(move |cx: &mut BlockContext| {
-        let gutter_dimensions = editor.read(cx).gutter_dimensions();
+        let editor_margins = editor.read(cx).editor_margins();

-        *gutter_dimensions.lock() = *cx.gutter_dimensions;
+        *editor_margins.lock() = *cx.margins;
        editor.clone().into_any_element()
    })
 }
@@ -1729,6 +1740,7 @@ struct AssistantCodeActionProvider {
    editor: WeakEntity<Editor>,
    workspace: WeakEntity<Workspace>,
    thread_store: Option<WeakEntity<ThreadStore>>,
+    text_thread_store: Option<WeakEntity<TextThreadStore>>,
 }

 const ASSISTANT_CODE_ACTION_PROVIDER_ID: &str = "assistant2";
@@ -1803,6 +1815,7 @@ impl CodeActionProvider for AssistantCodeActionProvider {
        let editor = self.editor.clone();
        let workspace = self.workspace.clone();
        let thread_store = self.thread_store.clone();
+        let text_thread_store = self.text_thread_store.clone();
        let prompt_store = PromptStore::global(cx);
        window.spawn(cx, async move |cx| {
            let workspace = workspace.upgrade().context("workspace was released")?;
@@ -1855,6 +1868,7 @@ impl CodeActionProvider for AssistantCodeActionProvider {
                    workspace,
                    prompt_store,
                    thread_store,
+                    text_thread_store,
                    window,
                    cx,
                );
--- a/crates/agent/src/inline_prompt_editor.rs
+++ b/crates/agent/src/inline_prompt_editor.rs
@@ -1,4 +1,4 @@
-use crate::assistant_model_selector::{AssistantModelSelector, ModelType};
+use crate::agent_model_selector::{AgentModelSelector, ModelType};
 use crate::buffer_codegen::BufferCodegen;
 use crate::context::ContextCreasesAddon;
 use crate::context_picker::{ContextPicker, ContextPickerCompletionProvider};
@@ -6,14 +6,14 @@ use crate::context_store::ContextStore;
 use crate::context_strip::{ContextStrip, ContextStripEvent, SuggestContextKind};
 use crate::message_editor::{extract_message_creases, insert_message_creases};
 use crate::terminal_codegen::TerminalCodegen;
-use crate::thread_store::ThreadStore;
+use crate::thread_store::{TextThreadStore, ThreadStore};
 use crate::{CycleNextInlineAssist, CyclePreviousInlineAssist};
 use crate::{RemoveAllContext, ToggleContextPicker};
 use client::ErrorExt;
 use collections::VecDeque;
+use editor::display_map::EditorMargins;
 use editor::{
-    ContextMenuOptions, Editor, EditorElement, EditorEvent, EditorMode, EditorStyle,
-    GutterDimensions, MultiBuffer,
+    ContextMenuOptions, Editor, EditorElement, EditorEvent, EditorMode, EditorStyle, MultiBuffer,
    actions::{MoveDown, MoveUp},
 };
 use feature_flags::{FeatureFlagAppExt as _, ZedProFeatureFlag};
@@ -42,7 +42,7 @@ pub struct PromptEditor<T> {
    context_store: Entity<ContextStore>,
    context_strip: Entity<ContextStrip>,
    context_picker_menu_handle: PopoverMenuHandle<ContextPicker>,
-    model_selector: Entity<AssistantModelSelector>,
+    model_selector: Entity<AgentModelSelector>,
    edited_since_done: bool,
    prompt_history: VecDeque<String>,
    prompt_history_ix: Option<usize>,
@@ -61,11 +61,13 @@ impl<T: 'static> Render for PromptEditor<T> {
        let ui_font_size = ThemeSettings::get_global(cx).ui_font_size(cx);
        let mut buttons = Vec::new();

-        let left_gutter_width = match &self.mode {
+        const RIGHT_PADDING: Pixels = px(9.);
+
+        let (left_gutter_width, right_padding) = match &self.mode {
            PromptEditorMode::Buffer {
                id: _,
                codegen,
-                gutter_dimensions,
+                editor_margins,
            } => {
                let codegen = codegen.read(cx);

@@ -73,13 +75,17 @@ impl<T: 'static> Render for PromptEditor<T> {
                    buttons.push(self.render_cycle_controls(&codegen, cx));
                }

-                let gutter_dimensions = gutter_dimensions.lock();
+                let editor_margins = editor_margins.lock();
+                let gutter = editor_margins.gutter;

-                gutter_dimensions.full_width() + (gutter_dimensions.margin / 2.0)
+                let left_gutter_width = gutter.full_width() + (gutter.margin / 2.0);
+                let right_padding = editor_margins.right + RIGHT_PADDING;
+
+                (left_gutter_width, right_padding)
            }
            PromptEditorMode::Terminal { .. } => {
                // Give the equivalent of the same left-padding that we're using on the right
-                Pixels::from(40.0)
+                (Pixels::from(40.0), Pixels::from(24.))
            }
        };

@@ -100,7 +106,7 @@ impl<T: 'static> Render for PromptEditor<T> {
            .size_full()
            .pt_0p5()
            .pb(bottom_padding)
-            .pr_6()
+            .pr(right_padding)
            .child(
                h_flex()
                    .items_start()
@@ -284,12 +290,12 @@ impl<T: 'static> PromptEditor<T> {
            PromptEditorMode::Terminal { .. } => "Generate",
        };

-        let assistant_panel_keybinding =
+        let agent_panel_keybinding =
            ui::text_for_action(&zed_actions::assistant::ToggleFocus, window, cx)
                .map(|keybinding| format!("{keybinding} to chat ― "))
                .unwrap_or_default();

-        format!("{action}… ({assistant_panel_keybinding}↓↑ for history)")
+        format!("{action}… ({agent_panel_keybinding}↓↑ for history)")
    }

    pub fn prompt(&self, cx: &App) -> String {
@@ -806,7 +812,7 @@ pub enum PromptEditorMode {
    Buffer {
        id: InlineAssistId,
        codegen: Entity<BufferCodegen>,
-        gutter_dimensions: Arc<Mutex<GutterDimensions>>,
+        editor_margins: Arc<Mutex<EditorMargins>>,
    },
    Terminal {
        id: TerminalInlineAssistId,
@@ -838,7 +844,7 @@ impl InlineAssistId {
 impl PromptEditor<BufferCodegen> {
    pub fn new_buffer(
        id: InlineAssistId,
-        gutter_dimensions: Arc<Mutex<GutterDimensions>>,
+        editor_margins: Arc<Mutex<EditorMargins>>,
        prompt_history: VecDeque<String>,
        prompt_buffer: Entity<MultiBuffer>,
        codegen: Entity<BufferCodegen>,
@@ -846,6 +852,7 @@ impl PromptEditor<BufferCodegen> {
        context_store: Entity<ContextStore>,
        workspace: WeakEntity<Workspace>,
        thread_store: Option<WeakEntity<ThreadStore>>,
+        text_thread_store: Option<WeakEntity<TextThreadStore>>,
        window: &mut Window,
        cx: &mut Context<PromptEditor<BufferCodegen>>,
    ) -> PromptEditor<BufferCodegen> {
@@ -854,7 +861,7 @@ impl PromptEditor<BufferCodegen> {
        let mode = PromptEditorMode::Buffer {
            id,
            codegen,
-            gutter_dimensions,
+            editor_margins,
        };

        let prompt_editor = cx.new(|cx| {
@@ -889,6 +896,7 @@ impl PromptEditor<BufferCodegen> {
                workspace.clone(),
                context_store.downgrade(),
                thread_store.clone(),
+                text_thread_store.clone(),
                prompt_editor_entity,
                codegen_buffer.as_ref().map(Entity::downgrade),
            ))));
@@ -902,6 +910,7 @@ impl PromptEditor<BufferCodegen> {
                context_store.clone(),
                workspace.clone(),
                thread_store.clone(),
+                text_thread_store.clone(),
                context_picker_menu_handle.clone(),
                SuggestContextKind::Thread,
                window,
@@ -918,7 +927,7 @@ impl PromptEditor<BufferCodegen> {
            context_strip,
            context_picker_menu_handle,
            model_selector: cx.new(|cx| {
-                AssistantModelSelector::new(
+                AgentModelSelector::new(
                    fs,
                    model_selector_menu_handle,
                    prompt_editor.focus_handle(cx),
@@ -992,11 +1001,9 @@ impl PromptEditor<BufferCodegen> {
        }
    }

-    pub fn gutter_dimensions(&self) -> &Arc<Mutex<GutterDimensions>> {
+    pub fn editor_margins(&self) -> &Arc<Mutex<EditorMargins>> {
        match &self.mode {
-            PromptEditorMode::Buffer {
-                gutter_dimensions, ..
-            } => gutter_dimensions,
+            PromptEditorMode::Buffer { editor_margins, .. } => editor_margins,
            PromptEditorMode::Terminal { .. } => unreachable!(),
        }
    }
@@ -1023,6 +1030,7 @@ impl PromptEditor<TerminalCodegen> {
        context_store: Entity<ContextStore>,
        workspace: WeakEntity<Workspace>,
        thread_store: Option<WeakEntity<ThreadStore>>,
+        text_thread_store: Option<WeakEntity<TextThreadStore>>,
        window: &mut Window,
        cx: &mut Context<Self>,
    ) -> Self {
@@ -1059,6 +1067,7 @@ impl PromptEditor<TerminalCodegen> {
                workspace.clone(),
                context_store.downgrade(),
                thread_store.clone(),
+                text_thread_store.clone(),
                prompt_editor_entity,
                None,
            ))));
@@ -1072,6 +1081,7 @@ impl PromptEditor<TerminalCodegen> {
                context_store.clone(),
                workspace.clone(),
                thread_store.clone(),
+                text_thread_store.clone(),
                context_picker_menu_handle.clone(),
                SuggestContextKind::Thread,
                window,
@@ -1088,7 +1098,7 @@ impl PromptEditor<TerminalCodegen> {
            context_strip,
            context_picker_menu_handle,
            model_selector: cx.new(|cx| {
-                AssistantModelSelector::new(
+                AgentModelSelector::new(
                    fs,
                    model_selector_menu_handle.clone(),
                    prompt_editor.focus_handle(cx),
--- a/crates/agent/src/message_editor.rs
+++ b/crates/agent/src/message_editor.rs
@@ -1,13 +1,14 @@
 use std::collections::BTreeMap;
 use std::sync::Arc;

-use crate::assistant_model_selector::{AssistantModelSelector, ModelType};
+use crate::agent_model_selector::{AgentModelSelector, ModelType};
 use crate::context::{AgentContextKey, ContextCreasesAddon, ContextLoadResult, load_context};
 use crate::tool_compatibility::{IncompatibleToolsState, IncompatibleToolsTooltip};
 use crate::ui::{
    AnimatedLabel, MaxModeTooltip,
    preview::{AgentPreview, UsageCallout},
 };
+use assistant_settings::{AssistantSettings, CompletionMode};
 use buffer_diff::BufferDiff;
 use client::UserStore;
 use collections::{HashMap, HashSet};
@@ -16,7 +17,6 @@ use editor::{
    AnchorRangeExt, ContextMenuOptions, ContextMenuPlacement, Editor, EditorElement, EditorEvent,
    EditorMode, EditorStyle, MultiBuffer,
 };
-use feature_flags::{FeatureFlagAppExt, NewBillingFeatureFlag};
 use file_icons::FileIcons;
 use fs::Fs;
 use futures::future::Shared;
@@ -26,7 +26,10 @@ use gpui::{
    Task, TextStyle, WeakEntity, linear_color_stop, linear_gradient, point, pulsating_between,
 };
 use language::{Buffer, Language};
-use language_model::{ConfiguredModel, LanguageModelRequestMessage, MessageContent, RequestUsage};
+use language_model::{
+    ConfiguredModel, LanguageModelRequestMessage, MessageContent, RequestUsage,
+    ZED_CLOUD_PROVIDER_ID,
+};
 use language_model_selector::ToggleModelSelector;
 use multi_buffer;
 use project::Project;
@@ -38,14 +41,13 @@ use theme::ThemeSettings;
 use ui::{Disclosure, KeyBinding, PopoverMenuHandle, Tooltip, prelude::*};
 use util::{ResultExt as _, maybe};
 use workspace::{CollaboratorId, Workspace};
-use zed_llm_client::CompletionMode;

 use crate::context_picker::{ContextPicker, ContextPickerCompletionProvider, crease_for_mention};
 use crate::context_store::ContextStore;
 use crate::context_strip::{ContextStrip, ContextStripEvent, SuggestContextKind};
 use crate::profile_selector::ProfileSelector;
 use crate::thread::{MessageCrease, Thread, TokenUsageRatio};
-use crate::thread_store::ThreadStore;
+use crate::thread_store::{TextThreadStore, ThreadStore};
 use crate::{
    ActiveThread, AgentDiffPane, Chat, ExpandMessageEditor, Follow, NewThread, OpenAgentDiff,
    RemoveAllContext, ToggleContextPicker, ToggleProfileSelector, register_agent_preview,
@@ -63,7 +65,7 @@ pub struct MessageEditor {
    prompt_store: Option<Entity<PromptStore>>,
    context_strip: Entity<ContextStrip>,
    context_picker_menu_handle: PopoverMenuHandle<ContextPicker>,
-    model_selector: Entity<AssistantModelSelector>,
+    model_selector: Entity<AgentModelSelector>,
    last_loaded_context: Option<ContextLoadResult>,
    load_context_task: Option<Shared<Task<()>>>,
    profile_selector: Entity<ProfileSelector>,
@@ -80,6 +82,7 @@ pub(crate) fn create_editor(
    workspace: WeakEntity<Workspace>,
    context_store: WeakEntity<ContextStore>,
    thread_store: WeakEntity<ThreadStore>,
+    text_thread_store: WeakEntity<TextThreadStore>,
    window: &mut Window,
    cx: &mut App,
 ) -> Entity<Editor> {
@@ -121,6 +124,7 @@ pub(crate) fn create_editor(
            workspace,
            context_store,
            Some(thread_store),
+            Some(text_thread_store),
            editor_entity,
            None,
        ))));
@@ -136,6 +140,7 @@ impl MessageEditor {
        context_store: Entity<ContextStore>,
        prompt_store: Option<Entity<PromptStore>>,
        thread_store: WeakEntity<ThreadStore>,
+        text_thread_store: WeakEntity<TextThreadStore>,
        thread: Entity<Thread>,
        window: &mut Window,
        cx: &mut Context<Self>,
@@ -147,6 +152,7 @@ impl MessageEditor {
            workspace.clone(),
            context_store.downgrade(),
            thread_store.clone(),
+            text_thread_store.clone(),
            window,
            cx,
        );
@@ -156,6 +162,7 @@ impl MessageEditor {
                context_store.clone(),
                workspace.clone(),
                Some(thread_store.clone()),
+                Some(text_thread_store.clone()),
                context_picker_menu_handle.clone(),
                SuggestContextKind::File,
                window,
@@ -182,7 +189,7 @@ impl MessageEditor {
        ];

        let model_selector = cx.new(|cx| {
-            AssistantModelSelector::new(
+            AgentModelSelector::new(
                fs.clone(),
                model_selector_menu_handle,
                editor.focus_handle(cx),
@@ -192,6 +199,10 @@ impl MessageEditor {
            )
        });

+        let profile_selector = cx.new(|cx| {
+            ProfileSelector::new(thread.clone(), thread_store, editor.focus_handle(cx), cx)
+        });
+
        Self {
            editor: editor.clone(),
            project: thread.read(cx).project().clone(),
@@ -208,8 +219,7 @@ impl MessageEditor {
            model_selector,
            edits_expanded: false,
            editor_is_expanded: false,
-            profile_selector: cx
-                .new(|cx| ProfileSelector::new(fs, thread_store, editor.focus_handle(cx), cx)),
+            profile_selector,
            last_estimated_token_count: None,
            update_token_count_task: None,
            _subscriptions: subscriptions,
@@ -290,6 +300,10 @@ impl MessageEditor {
        self.editor.read(cx).text(cx).trim().is_empty()
    }

+    pub fn is_editor_fully_empty(&self, cx: &App) -> bool {
+        self.editor.read(cx).is_empty(cx)
+    }
+
    fn send_to_model(&mut self, window: &mut Window, cx: &mut Context<Self>) {
        let Some(ConfiguredModel { model, provider }) = self
            .thread
@@ -435,10 +449,6 @@ impl MessageEditor {
    }

    fn render_max_mode_toggle(&self, cx: &mut Context<Self>) -> Option<AnyElement> {
-        if !cx.has_flag::<NewBillingFeatureFlag>() {
-            return None;
-        }
-
        let thread = self.thread.read(cx);
        let model = thread.configured_model();
        if !model?.model.supports_max_mode() {
@@ -446,12 +456,17 @@ impl MessageEditor {
        }

        let active_completion_mode = thread.completion_mode();
+        let max_mode_enabled = active_completion_mode == CompletionMode::Max;

        Some(
-            IconButton::new("max-mode", IconName::ZedMaxMode)
+            Button::new("max-mode", "Max Mode")
+                .label_size(LabelSize::Small)
+                .color(Color::Muted)
+                .icon(IconName::ZedMaxMode)
                .icon_size(IconSize::Small)
                .icon_color(Color::Muted)
-                .toggle_state(active_completion_mode == CompletionMode::Max)
+                .icon_position(IconPosition::Start)
+                .toggle_state(max_mode_enabled)
                .on_click(cx.listener(move |this, _event, _window, cx| {
                    this.thread.update(cx, |thread, _cx| {
                        thread.set_completion_mode(match active_completion_mode {
@@ -460,7 +475,10 @@ impl MessageEditor {
                        });
                    });
                }))
-                .tooltip(|_, cx| cx.new(MaxModeTooltip::new).into())
+                .tooltip(move |_window, cx| {
+                    cx.new(|_| MaxModeTooltip::new().selected(max_mode_enabled))
+                        .into()
+                })
                .into_any_element(),
        )
    }
@@ -504,13 +522,7 @@ impl MessageEditor {
            }))
    }

-    fn render_editor(
-        &self,
-        font_size: Rems,
-        line_height: Pixels,
-        window: &mut Window,
-        cx: &mut Context<Self>,
-    ) -> Div {
+    fn render_editor(&self, window: &mut Window, cx: &mut Context<Self>) -> Div {
        let thread = self.thread.read(cx);
        let model = thread.configured_model();

@@ -611,11 +623,15 @@ impl MessageEditor {
                        this.h(vh(0.8, window)).justify_between()
                    })
                    .child(
-                        div()
+                        v_flex()
                            .min_h_16()
                            .when(is_editor_expanded, |this| this.h_full())
                            .child({
                                let settings = ThemeSettings::get_global(cx);
+                                let font_size = TextSize::Small
+                                    .rems(cx)
+                                    .to_pixels(settings.agent_font_size(cx));
+                                let line_height = settings.buffer_line_height.value() * font_size;

                                let text_style = TextStyle {
                                    color: cx.theme().colors().text,
@@ -1039,7 +1055,14 @@ impl MessageEditor {
    }

    fn render_usage_callout(&self, line_height: Pixels, cx: &mut Context<Self>) -> Option<Div> {
-        if !cx.has_flag::<NewBillingFeatureFlag>() {
+        let is_using_zed_provider = self
+            .thread
+            .read(cx)
+            .configured_model()
+            .map_or(false, |model| {
+                model.provider.id().0 == ZED_CLOUD_PROVIDER_ID
+            });
+        if !is_using_zed_provider {
            return None;
        }

@@ -1093,10 +1116,6 @@ impl MessageEditor {
        token_usage_ratio: TokenUsageRatio,
        cx: &mut Context<Self>,
    ) -> Option<Div> {
-        if !cx.has_flag::<NewBillingFeatureFlag>() {
-            return None;
-        }
-
        let title = if token_usage_ratio == TokenUsageRatio::Exceeded {
            "Thread reached the token limit"
        } else {
@@ -1226,8 +1245,9 @@ impl MessageEditor {
                        mode: None,
                        messages: vec![request_message],
                        tools: vec![],
+                        tool_choice: None,
                        stop: vec![],
-                        temperature: None,
+                        temperature: AssistantSettings::temperature_for_model(&model.model, cx),
                    };

                    Some(model.model.count_tokens(request, cx))
@@ -1324,15 +1344,14 @@ impl Render for MessageEditor {
        let action_log = self.thread.read(cx).action_log();
        let changed_buffers = action_log.read(cx).changed_buffers(cx);

-        let font_size = TextSize::Small.rems(cx);
-        let line_height = font_size.to_pixels(window.rem_size()) * 1.5;
+        let line_height = TextSize::Small.rems(cx).to_pixels(window.rem_size()) * 1.5;

        v_flex()
            .size_full()
            .when(changed_buffers.len() > 0, |parent| {
                parent.child(self.render_changed_buffers(&changed_buffers, window, cx))
            })
-            .child(self.render_editor(font_size, line_height, window, cx))
+            .child(self.render_editor(window, cx))
            .children({
                let usage_callout = self.render_usage_callout(line_height, cx);

@@ -1400,16 +1419,19 @@ impl AgentPreview for MessageEditor {
    fn agent_preview(
        workspace: WeakEntity<Workspace>,
        active_thread: Entity<ActiveThread>,
-        thread_store: WeakEntity<ThreadStore>,
        window: &mut Window,
        cx: &mut App,
    ) -> Option<AnyElement> {
        if let Some(workspace) = workspace.upgrade() {
            let fs = workspace.read(cx).app_state().fs.clone();
            let user_store = workspace.read(cx).app_state().user_store.clone();
-            let weak_project = workspace.read(cx).project().clone().downgrade();
+            let project = workspace.read(cx).project().clone();
+            let weak_project = project.downgrade();
            let context_store = cx.new(|_cx| ContextStore::new(weak_project, None));
-            let thread = active_thread.read(cx).thread().clone();
+            let active_thread = active_thread.read(cx);
+            let thread = active_thread.thread().clone();
+            let thread_store = active_thread.thread_store().clone();
+            let text_thread_store = active_thread.text_thread_store().clone();

            let default_message_editor = cx.new(|cx| {
                MessageEditor::new(
@@ -1418,7 +1440,8 @@ impl AgentPreview for MessageEditor {
                    user_store,
                    context_store,
                    None,
-                    thread_store,
+                    thread_store.downgrade(),
+                    text_thread_store.downgrade(),
                    thread,
                    window,
                    cx,
--- a/crates/agent/src/profile_selector.rs
+++ b/crates/agent/src/profile_selector.rs
@@ -1,20 +1,21 @@
-use std::sync::Arc;
-
 use assistant_settings::{
-    AgentProfile, AgentProfileId, AssistantSettings, GroupedAgentProfiles, builtin_profiles,
+    AgentProfile, AgentProfileId, AssistantDockPosition, AssistantSettings, GroupedAgentProfiles,
+    builtin_profiles,
 };
-use fs::Fs;
 use gpui::{Action, Entity, FocusHandle, Subscription, WeakEntity, prelude::*};
 use language_model::LanguageModelRegistry;
-use settings::{Settings as _, SettingsStore, update_settings_file};
-use ui::{ContextMenu, ContextMenuEntry, PopoverMenu, PopoverMenuHandle, Tooltip, prelude::*};
+use settings::{Settings as _, SettingsStore};
+use ui::{
+    ContextMenu, ContextMenuEntry, DocumentationSide, PopoverMenu, PopoverMenuHandle, Tooltip,
+    prelude::*,
+};
 use util::ResultExt as _;

-use crate::{ManageProfiles, ThreadStore, ToggleProfileSelector};
+use crate::{ManageProfiles, Thread, ThreadStore, ToggleProfileSelector};

 pub struct ProfileSelector {
    profiles: GroupedAgentProfiles,
-    fs: Arc<dyn Fs>,
+    thread: Entity<Thread>,
    thread_store: WeakEntity<ThreadStore>,
    menu_handle: PopoverMenuHandle<ContextMenu>,
    focus_handle: FocusHandle,
@@ -23,7 +24,7 @@ pub struct ProfileSelector {

 impl ProfileSelector {
    pub fn new(
-        fs: Arc<dyn Fs>,
+        thread: Entity<Thread>,
        thread_store: WeakEntity<ThreadStore>,
        focus_handle: FocusHandle,
        cx: &mut Context<Self>,
@@ -34,7 +35,7 @@ impl ProfileSelector {

        Self {
            profiles: GroupedAgentProfiles::from_settings(AssistantSettings::get_global(cx)),
-            fs,
+            thread,
            thread_store,
            menu_handle: PopoverMenuHandle::default(),
            focus_handle,
@@ -101,21 +102,23 @@ impl ProfileSelector {
            .toggleable(IconPosition::End, profile_id == settings.default_profile);

        let entry = if let Some(doc_text) = documentation {
-            entry.documentation_aside(move |_| Label::new(doc_text).into_any_element())
+            entry.documentation_aside(documentation_side(settings.dock), move |_| {
+                Label::new(doc_text).into_any_element()
+            })
        } else {
            entry
        };

        entry.handler({
-            let fs = self.fs.clone();
            let thread_store = self.thread_store.clone();
            let profile_id = profile_id.clone();
+            let profile = profile.clone();
+
+            let thread = self.thread.clone();
+
            move |_window, cx| {
-                update_settings_file::<AssistantSettings>(fs.clone(), cx, {
-                    let profile_id = profile_id.clone();
-                    move |settings, _cx| {
-                        settings.set_profile(profile_id.clone());
-                    }
+                thread.update(cx, |thread, cx| {
+                    thread.set_configured_profile(Some(profile.clone()), cx);
                });

                thread_store
@@ -131,54 +134,80 @@ impl ProfileSelector {
 impl Render for ProfileSelector {
    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
        let settings = AssistantSettings::get_global(cx);
-        let profile_id = &settings.default_profile;
-        let profile = settings.profiles.get(profile_id);
+        let profile = self
+            .thread
+            .read_with(cx, |thread, _cx| thread.configured_profile())
+            .or_else(|| {
+                let profile_id = &settings.default_profile;
+                let profile = settings.profiles.get(profile_id);
+                profile.cloned()
+            });

        let selected_profile = profile
            .map(|profile| profile.name.clone())
            .unwrap_or_else(|| "Unknown".into());

-        let model_registry = LanguageModelRegistry::read_global(cx);
-        let supports_tools = model_registry
-            .default_model()
-            .map_or(false, |default| default.model.supports_tools());
+        let configured_model = self
+            .thread
+            .read_with(cx, |thread, _cx| thread.configured_model())
+            .or_else(|| {
+                let model_registry = LanguageModelRegistry::read_global(cx);
+                model_registry.default_model()
+            });
+        let supports_tools =
+            configured_model.map_or(false, |default| default.model.supports_tools());

-        let this = cx.entity().clone();
-        let focus_handle = self.focus_handle.clone();
-
-        let trigger_button = if supports_tools {
-            Button::new("profile-selector-model", selected_profile)
+        if supports_tools {
+            let this = cx.entity().clone();
+            let focus_handle = self.focus_handle.clone();
+            let trigger_button = Button::new("profile-selector-model", selected_profile)
                .label_size(LabelSize::Small)
                .color(Color::Muted)
                .icon(IconName::ChevronDown)
                .icon_size(IconSize::XSmall)
                .icon_position(IconPosition::End)
-                .icon_color(Color::Muted)
+                .icon_color(Color::Muted);
+
+            PopoverMenu::new("profile-selector")
+                .trigger_with_tooltip(trigger_button, {
+                    let focus_handle = focus_handle.clone();
+                    move |window, cx| {
+                        Tooltip::for_action_in(
+                            "Toggle Profile Menu",
+                            &ToggleProfileSelector,
+                            &focus_handle,
+                            window,
+                            cx,
+                        )
+                    }
+                })
+                .anchor(
+                    if documentation_side(settings.dock) == DocumentationSide::Left {
+                        gpui::Corner::BottomRight
+                    } else {
+                        gpui::Corner::BottomLeft
+                    },
+                )
+                .with_handle(self.menu_handle.clone())
+                .menu(move |window, cx| {
+                    Some(this.update(cx, |this, cx| this.build_context_menu(window, cx)))
+                })
+                .into_any_element()
        } else {
-            Button::new("tools-not-supported-button", "No Tools")
+            Button::new("tools-not-supported-button", "Tools Unsupported")
                .disabled(true)
                .label_size(LabelSize::Small)
                .color(Color::Muted)
-                .tooltip(Tooltip::text("The current model does not support tools."))
-        };
-
-        PopoverMenu::new("profile-selector")
-            .trigger_with_tooltip(trigger_button, {
-                let focus_handle = focus_handle.clone();
-                move |window, cx| {
-                    Tooltip::for_action_in(
-                        "Toggle Profile Menu",
-                        &ToggleProfileSelector,
-                        &focus_handle,
-                        window,
-                        cx,
-                    )
-                }
-            })
-            .anchor(gpui::Corner::BottomRight)
-            .with_handle(self.menu_handle.clone())
-            .menu(move |window, cx| {
-                Some(this.update(cx, |this, cx| this.build_context_menu(window, cx)))
-            })
+                .tooltip(Tooltip::text("This model does not support tools."))
+                .into_any_element()
+        }
+    }
+}
+
+fn documentation_side(position: AssistantDockPosition) -> DocumentationSide {
+    match position {
+        AssistantDockPosition::Left => DocumentationSide::Right,
+        AssistantDockPosition::Bottom => DocumentationSide::Left,
+        AssistantDockPosition::Right => DocumentationSide::Left,
    }
 }
--- a/crates/assistant/src/slash_command_settings.rs
+++ b/crates/assistant/src/slash_command_settings.rs
--- a/crates/agent/src/terminal_inline_assistant.rs
+++ b/crates/agent/src/terminal_inline_assistant.rs
@@ -4,8 +4,9 @@ use crate::inline_prompt_editor::{
    CodegenStatus, PromptEditor, PromptEditorEvent, TerminalInlineAssistId,
 };
 use crate::terminal_codegen::{CLEAR_INPUT, CodegenEvent, TerminalCodegen};
-use crate::thread_store::ThreadStore;
+use crate::thread_store::{TextThreadStore, ThreadStore};
 use anyhow::{Context as _, Result};
+use assistant_settings::AssistantSettings;
 use client::telemetry::Telemetry;
 use collections::{HashMap, VecDeque};
 use editor::{MultiBuffer, actions::SelectAll};
@@ -71,13 +72,19 @@ impl TerminalInlineAssistant {
        project: WeakEntity<Project>,
        prompt_store: Option<Entity<PromptStore>>,
        thread_store: Option<WeakEntity<ThreadStore>>,
+        text_thread_store: Option<WeakEntity<TextThreadStore>>,
+        initial_prompt: Option<String>,
        window: &mut Window,
        cx: &mut App,
    ) {
        let terminal = terminal_view.read(cx).terminal().clone();
        let assist_id = self.next_assist_id.post_inc();
-        let prompt_buffer =
-            cx.new(|cx| MultiBuffer::singleton(cx.new(|cx| Buffer::local(String::new(), cx)), cx));
+        let prompt_buffer = cx.new(|cx| {
+            MultiBuffer::singleton(
+                cx.new(|cx| Buffer::local(initial_prompt.unwrap_or_default(), cx)),
+                cx,
+            )
+        });
        let context_store = cx.new(|_cx| ContextStore::new(project, thread_store.clone()));
        let codegen = cx.new(|_| TerminalCodegen::new(terminal, self.telemetry.clone()));

@@ -91,6 +98,7 @@ impl TerminalInlineAssistant {
                context_store.clone(),
                workspace.clone(),
                thread_store.clone(),
+                text_thread_store.clone(),
                window,
                cx,
            )
@@ -259,6 +267,12 @@ impl TerminalInlineAssistant {
            load_context(contexts, project, &assist.prompt_store, cx)
        })?;

+        let ConfiguredModel { model, .. } = LanguageModelRegistry::read_global(cx)
+            .inline_assistant_model()
+            .context("No inline assistant model")?;
+
+        let temperature = AssistantSettings::temperature_for_model(&model, cx);
+
        Ok(cx.background_spawn(async move {
            let mut request_message = LanguageModelRequestMessage {
                role: Role::User,
@@ -279,8 +293,9 @@ impl TerminalInlineAssistant {
                mode: None,
                messages: vec![request_message],
                tools: Vec::new(),
+                tool_choice: None,
                stop: Vec::new(),
-                temperature: None,
+                temperature,
            }
        }))
    }
--- a/crates/agent/src/thread.rs
+++ b/crates/agent/src/thread.rs
@@ -5,7 +5,7 @@ use std::sync::Arc;
 use std::time::Instant;

 use anyhow::{Result, anyhow};
-use assistant_settings::AssistantSettings;
+use assistant_settings::{AgentProfile, AgentProfileId, AssistantSettings, CompletionMode};
 use assistant_tool::{ActionLog, AnyToolCard, Tool, ToolWorkingSet};
 use chrono::{DateTime, Utc};
 use collections::HashMap;
@@ -35,9 +35,10 @@ use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use settings::Settings;
 use thiserror::Error;
+use ui::Window;
 use util::{ResultExt as _, TryFutureExt as _, post_inc};
 use uuid::Uuid;
-use zed_llm_client::{CompletionMode, CompletionRequestStatus};
+use zed_llm_client::CompletionRequestStatus;

 use crate::ThreadStore;
 use crate::context::{AgentContext, AgentContextHandle, ContextLoadResult, LoadedContext};
@@ -267,7 +268,7 @@ impl DetailedSummaryState {
    }
 }

-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct TotalTokenUsage {
    pub total: usize,
    pub max: usize,
@@ -312,14 +313,6 @@ pub enum TokenUsageRatio {
    Exceeded,
 }

-fn default_completion_mode(cx: &App) -> CompletionMode {
-    if cx.is_staff() {
-        CompletionMode::Max
-    } else {
-        CompletionMode::Normal
-    }
-}
-
 #[derive(Debug, Clone, Copy)]
 pub enum QueueState {
    Sending,
@@ -336,7 +329,7 @@ pub struct Thread {
    detailed_summary_task: Task<Option<()>>,
    detailed_summary_tx: postage::watch::Sender<DetailedSummaryState>,
    detailed_summary_rx: postage::watch::Receiver<DetailedSummaryState>,
-    completion_mode: CompletionMode,
+    completion_mode: assistant_settings::CompletionMode,
    messages: Vec<Message>,
    next_message_id: MessageId,
    last_prompt_id: PromptId,
@@ -366,6 +359,7 @@ pub struct Thread {
    >,
    remaining_turns: u32,
    configured_model: Option<ConfiguredModel>,
+    configured_profile: Option<AgentProfile>,
 }

 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -386,6 +380,9 @@ impl Thread {
    ) -> Self {
        let (detailed_summary_tx, detailed_summary_rx) = postage::watch::channel();
        let configured_model = LanguageModelRegistry::read_global(cx).default_model();
+        let assistant_settings = AssistantSettings::get_global(cx);
+        let profile_id = &assistant_settings.default_profile;
+        let configured_profile = assistant_settings.profiles.get(profile_id).cloned();

        Self {
            id: ThreadId::new(),
@@ -395,7 +392,7 @@ impl Thread {
            detailed_summary_task: Task::ready(None),
            detailed_summary_tx,
            detailed_summary_rx,
-            completion_mode: default_completion_mode(cx),
+            completion_mode: AssistantSettings::get_global(cx).preferred_completion_mode,
            messages: Vec::new(),
            next_message_id: MessageId(0),
            last_prompt_id: PromptId::new(),
@@ -428,6 +425,7 @@ impl Thread {
            request_callback: None,
            remaining_turns: u32::MAX,
            configured_model,
+            configured_profile,
        }
    }

@@ -438,6 +436,7 @@ impl Thread {
        tools: Entity<ToolWorkingSet>,
        prompt_builder: Arc<PromptBuilder>,
        project_context: SharedProjectContext,
+        window: &mut Window,
        cx: &mut Context<Self>,
    ) -> Self {
        let next_message_id = MessageId(
@@ -447,7 +446,13 @@ impl Thread {
                .map(|message| message.id.0 + 1)
                .unwrap_or(0),
        );
-        let tool_use = ToolUseState::from_serialized_messages(tools.clone(), &serialized.messages);
+        let tool_use = ToolUseState::from_serialized_messages(
+            tools.clone(),
+            &serialized.messages,
+            project.clone(),
+            window,
+            cx,
+        );
        let (detailed_summary_tx, detailed_summary_rx) =
            postage::watch::channel_with(serialized.detailed_summary_state);

@@ -464,6 +469,17 @@ impl Thread {
                .or_else(|| registry.default_model())
        });

+        let completion_mode = serialized
+            .completion_mode
+            .unwrap_or_else(|| AssistantSettings::get_global(cx).preferred_completion_mode);
+
+        let configured_profile = serialized.profile.and_then(|profile| {
+            AssistantSettings::get_global(cx)
+                .profiles
+                .get(&profile)
+                .cloned()
+        });
+
        Self {
            id,
            updated_at: serialized.updated_at,
@@ -472,7 +488,7 @@ impl Thread {
            detailed_summary_task: Task::ready(None),
            detailed_summary_tx,
            detailed_summary_rx,
-            completion_mode: default_completion_mode(cx),
+            completion_mode,
            messages: serialized
                .messages
                .into_iter()
@@ -537,6 +553,7 @@ impl Thread {
            request_callback: None,
            remaining_turns: u32::MAX,
            configured_model,
+            configured_profile,
        }
    }

@@ -592,6 +609,19 @@ impl Thread {
        cx.notify();
    }

+    pub fn configured_profile(&self) -> Option<AgentProfile> {
+        self.configured_profile.clone()
+    }
+
+    pub fn set_configured_profile(
+        &mut self,
+        profile: Option<AgentProfile>,
+        cx: &mut Context<Self>,
+    ) {
+        self.configured_profile = profile;
+        cx.notify();
+    }
+
    pub const DEFAULT_SUMMARY: SharedString = SharedString::new_static("New Thread");

    pub fn summary_or_default(&self) -> SharedString {
@@ -998,7 +1028,7 @@ impl Thread {
        for message in &self.messages {
            text.push_str(match message.role {
                language_model::Role::User => "User:",
-                language_model::Role::Assistant => "Assistant:",
+                language_model::Role::Assistant => "Agent:",
                language_model::Role::System => "System:",
            });
            text.push('\n');
@@ -1068,6 +1098,7 @@ impl Thread {
                                tool_use_id: tool_result.tool_use_id.clone(),
                                is_error: tool_result.is_error,
                                content: tool_result.content.clone(),
+                                output: tool_result.output.clone(),
                            })
                            .collect(),
                        context: message.loaded_context.text.clone(),
@@ -1095,6 +1126,11 @@ impl Thread {
                        provider: model.provider.id().0.to_string(),
                        model: model.model.id().0.to_string(),
                    }),
+                profile: this
+                    .configured_profile
+                    .as_ref()
+                    .map(|profile| AgentProfileId(profile.name.clone().into())),
+                completion_mode: Some(this.completion_mode),
            })
        })
    }
@@ -1147,8 +1183,9 @@ impl Thread {
            mode: None,
            messages: vec![],
            tools: Vec::new(),
+            tool_choice: None,
            stop: Vec::new(),
-            temperature: None,
+            temperature: AssistantSettings::temperature_for_model(&model, cx),
        };

        let available_tools = self.available_tools(cx, model.clone());
@@ -1191,6 +1228,7 @@ impl Thread {
            }));
        }

+        let mut message_ix_to_cache = None;
        for message in &self.messages {
            let mut request_message = LanguageModelRequestMessage {
                role: message.role,
@@ -1227,42 +1265,86 @@ impl Thread {
                };
            }

-            self.tool_use
-                .attach_tool_uses(message.id, &mut request_message);
+            let mut cache_message = true;
+            let mut tool_results_message = LanguageModelRequestMessage {
+                role: Role::User,
+                content: Vec::new(),
+                cache: false,
+            };
+            for (tool_use, tool_result) in self.tool_use.tool_results(message.id) {
+                if let Some(tool_result) = tool_result {
+                    request_message
+                        .content
+                        .push(MessageContent::ToolUse(tool_use.clone()));
+                    tool_results_message
+                        .content
+                        .push(MessageContent::ToolResult(LanguageModelToolResult {
+                            tool_use_id: tool_use.id.clone(),
+                            tool_name: tool_result.tool_name.clone(),
+                            is_error: tool_result.is_error,
+                            content: if tool_result.content.is_empty() {
+                                // Surprisingly, the API fails if we return an empty string here.
+                                // It thinks we are sending a tool use without a tool result.
+                                "<Tool returned an empty string>".into()
+                            } else {
+                                tool_result.content.clone()
+                            },
+                            output: None,
+                        }));
+                } else {
+                    cache_message = false;
+                    log::debug!(
+                        "skipped tool use {:?} because it is still pending",
+                        tool_use
+                    );
+                }
+            }

+            if cache_message {
+                message_ix_to_cache = Some(request.messages.len());
+            }
            request.messages.push(request_message);

-            if let Some(tool_results_message) = self.tool_use.tool_results_message(message.id) {
+            if !tool_results_message.content.is_empty() {
+                if cache_message {
+                    message_ix_to_cache = Some(request.messages.len());
+                }
                request.messages.push(tool_results_message);
            }
        }

        // https://docs.anthropic.com/en/docs/build-with-claude/prompt-caching
-        if let Some(last) = request.messages.last_mut() {
-            last.cache = true;
+        if let Some(message_ix_to_cache) = message_ix_to_cache {
+            request.messages[message_ix_to_cache].cache = true;
        }

        self.attached_tracked_files_state(&mut request.messages, cx);

        request.tools = available_tools;
        request.mode = if model.supports_max_mode() {
-            Some(self.completion_mode)
+            Some(self.completion_mode.into())
        } else {
-            Some(CompletionMode::Normal)
+            Some(CompletionMode::Normal.into())
        };

        request
    }

-    fn to_summarize_request(&self, added_user_message: String) -> LanguageModelRequest {
+    fn to_summarize_request(
+        &self,
+        model: &Arc<dyn LanguageModel>,
+        added_user_message: String,
+        cx: &App,
+    ) -> LanguageModelRequest {
        let mut request = LanguageModelRequest {
            thread_id: None,
            prompt_id: None,
            mode: None,
            messages: vec![],
            tools: Vec::new(),
+            tool_choice: None,
            stop: Vec::new(),
-            temperature: None,
+            temperature: AssistantSettings::temperature_for_model(model, cx),
        };

        for message in &self.messages {
@@ -1535,9 +1617,9 @@ impl Thread {
                                            completion.queue_state =  QueueState::Started;
                                        }
                                        CompletionRequestStatus::Failed {
-                                            code, message
+                                            code, message, request_id
                                        } => {
-                                            return Err(anyhow!("completion request failed. code: {code}, message: {message}"));
+                                            return Err(anyhow!("completion request failed. request_id: {request_id}, code: {code}, message: {message}"));
                                        }
                                        CompletionRequestStatus::UsageUpdated {
                                            amount, limit
@@ -1699,7 +1781,7 @@ impl Thread {
            If the conversation is about a specific subject, include it in the title. \
            Be descriptive. DO NOT speak in the first person.";

-        let request = self.to_summarize_request(added_user_message.into());
+        let request = self.to_summarize_request(&model.model, added_user_message.into(), cx);

        self.pending_summary = cx.spawn(async move |this, cx| {
            async move {
@@ -1785,7 +1867,7 @@ impl Thread {
             4. Any action items or next steps if any\n\
             Format it in Markdown with headings and bullet points.";

-        let request = self.to_summarize_request(added_user_message.into());
+        let request = self.to_summarize_request(&model, added_user_message.into(), cx);

        *self.detailed_summary_tx.borrow_mut() = DetailedSummaryState::Generating {
            message_id: last_message_id,
@@ -1877,8 +1959,7 @@ impl Thread {
        model: Arc<dyn LanguageModel>,
    ) -> Vec<PendingToolUse> {
        self.auto_capture_telemetry(cx);
-        let request = self.to_completion_request(model, cx);
-        let messages = Arc::new(request.messages);
+        let request = Arc::new(self.to_completion_request(model.clone(), cx));
        let pending_tool_uses = self
            .tool_use
            .pending_tool_uses()
@@ -1896,7 +1977,7 @@ impl Thread {
                        tool_use.id.clone(),
                        tool_use.ui_text.clone(),
                        tool_use.input.clone(),
-                        messages.clone(),
+                        request.clone(),
                        tool,
                    );
                    cx.emit(ThreadEvent::ToolConfirmationNeeded);
@@ -1905,8 +1986,9 @@ impl Thread {
                        tool_use.id.clone(),
                        tool_use.ui_text.clone(),
                        tool_use.input.clone(),
-                        &messages,
+                        request.clone(),
                        tool,
+                        model.clone(),
                        window,
                        cx,
                    );
@@ -1999,12 +2081,14 @@ impl Thread {
        tool_use_id: LanguageModelToolUseId,
        ui_text: impl Into<SharedString>,
        input: serde_json::Value,
-        messages: &[LanguageModelRequestMessage],
+        request: Arc<LanguageModelRequest>,
        tool: Arc<dyn Tool>,
+        model: Arc<dyn LanguageModel>,
        window: Option<AnyWindowHandle>,
        cx: &mut Context<Thread>,
    ) {
-        let task = self.spawn_tool_use(tool_use_id.clone(), messages, input, tool, window, cx);
+        let task =
+            self.spawn_tool_use(tool_use_id.clone(), request, input, tool, model, window, cx);
        self.tool_use
            .run_pending_tool(tool_use_id, ui_text.into(), task);
    }
@@ -2012,9 +2096,10 @@ impl Thread {
    fn spawn_tool_use(
        &mut self,
        tool_use_id: LanguageModelToolUseId,
-        messages: &[LanguageModelRequestMessage],
+        request: Arc<LanguageModelRequest>,
        input: serde_json::Value,
        tool: Arc<dyn Tool>,
+        model: Arc<dyn LanguageModel>,
        window: Option<AnyWindowHandle>,
        cx: &mut Context<Thread>,
    ) -> Task<()> {
@@ -2025,9 +2110,10 @@ impl Thread {
        } else {
            tool.run(
                input,
-                messages,
+                request,
                self.project.clone(),
                self.action_log.clone(),
+                model,
                window,
                cx,
            )
@@ -2360,7 +2446,7 @@ impl Thread {
                "## {role}\n",
                role = match message.role {
                    Role::User => "User",
-                    Role::Assistant => "Assistant",
+                    Role::Assistant => "Agent",
                    Role::System => "System",
                }
            )?;
@@ -2658,7 +2744,7 @@ struct PendingCompletion {
 mod tests {
    use super::*;
    use crate::{ThreadStore, context::load_context, context_store::ContextStore, thread_store};
-    use assistant_settings::AssistantSettings;
+    use assistant_settings::{AssistantSettings, LanguageModelParameters};
    use assistant_tool::ToolRegistry;
    use editor::EditorSettings;
    use gpui::TestAppContext;
@@ -3069,6 +3155,100 @@ fn main() {{
        );
    }

+    #[gpui::test]
+    async fn test_temperature_setting(cx: &mut TestAppContext) {
+        init_test_settings(cx);
+
+        let project = create_test_project(
+            cx,
+            json!({"code.rs": "fn main() {\n    println!(\"Hello, world!\");\n}"}),
+        )
+        .await;
+
+        let (_workspace, _thread_store, thread, _context_store, model) =
+            setup_test_environment(cx, project.clone()).await;
+
+        // Both model and provider
+        cx.update(|cx| {
+            AssistantSettings::override_global(
+                AssistantSettings {
+                    model_parameters: vec![LanguageModelParameters {
+                        provider: Some(model.provider_id().0.to_string().into()),
+                        model: Some(model.id().0.clone()),
+                        temperature: Some(0.66),
+                    }],
+                    ..AssistantSettings::get_global(cx).clone()
+                },
+                cx,
+            );
+        });
+
+        let request = thread.update(cx, |thread, cx| {
+            thread.to_completion_request(model.clone(), cx)
+        });
+        assert_eq!(request.temperature, Some(0.66));
+
+        // Only model
+        cx.update(|cx| {
+            AssistantSettings::override_global(
+                AssistantSettings {
+                    model_parameters: vec![LanguageModelParameters {
+                        provider: None,
+                        model: Some(model.id().0.clone()),
+                        temperature: Some(0.66),
+                    }],
+                    ..AssistantSettings::get_global(cx).clone()
+                },
+                cx,
+            );
+        });
+
+        let request = thread.update(cx, |thread, cx| {
+            thread.to_completion_request(model.clone(), cx)
+        });
+        assert_eq!(request.temperature, Some(0.66));
+
+        // Only provider
+        cx.update(|cx| {
+            AssistantSettings::override_global(
+                AssistantSettings {
+                    model_parameters: vec![LanguageModelParameters {
+                        provider: Some(model.provider_id().0.to_string().into()),
+                        model: None,
+                        temperature: Some(0.66),
+                    }],
+                    ..AssistantSettings::get_global(cx).clone()
+                },
+                cx,
+            );
+        });
+
+        let request = thread.update(cx, |thread, cx| {
+            thread.to_completion_request(model.clone(), cx)
+        });
+        assert_eq!(request.temperature, Some(0.66));
+
+        // Same model name, different provider
+        cx.update(|cx| {
+            AssistantSettings::override_global(
+                AssistantSettings {
+                    model_parameters: vec![LanguageModelParameters {
+                        provider: Some("anthropic".into()),
+                        model: Some(model.id().0.clone()),
+                        temperature: Some(0.66),
+                    }],
+                    ..AssistantSettings::get_global(cx).clone()
+                },
+                cx,
+            );
+        });
+
+        let request = thread.update(cx, |thread, cx| {
+            thread.to_completion_request(model.clone(), cx)
+        });
+        assert_eq!(request.temperature, None);
+    }
+
    fn init_test_settings(cx: &mut TestAppContext) {
        cx.update(|cx| {
            let settings_store = SettingsStore::test(cx);
--- a/crates/agent/src/thread_history.rs
+++ b/crates/agent/src/thread_history.rs
@@ -1,11 +1,14 @@
+use std::fmt::Display;
+use std::ops::Range;
 use std::sync::Arc;

 use assistant_context_editor::SavedContextMetadata;
+use chrono::{Datelike as _, Local, NaiveDate, TimeDelta};
 use editor::{Editor, EditorEvent};
 use fuzzy::{StringMatch, StringMatchCandidate};
 use gpui::{
-    App, Entity, FocusHandle, Focusable, ScrollStrategy, Stateful, Task, UniformListScrollHandle,
-    WeakEntity, Window, uniform_list,
+    App, Empty, Entity, FocusHandle, Focusable, ScrollStrategy, Stateful, Task,
+    UniformListScrollHandle, WeakEntity, Window, uniform_list,
 };
 use time::{OffsetDateTime, UtcOffset};
 use ui::{
@@ -16,26 +19,57 @@ use util::ResultExt;

 use crate::history_store::{HistoryEntry, HistoryStore};
 use crate::thread_store::SerializedThreadMetadata;
-use crate::{AssistantPanel, RemoveSelectedThread};
+use crate::{AgentPanel, RemoveSelectedThread};

 pub struct ThreadHistory {
-    assistant_panel: WeakEntity<AssistantPanel>,
+    agent_panel: WeakEntity<AgentPanel>,
    history_store: Entity<HistoryStore>,
    scroll_handle: UniformListScrollHandle,
    selected_index: usize,
-    search_query: SharedString,
    search_editor: Entity<Editor>,
    all_entries: Arc<Vec<HistoryEntry>>,
-    matches: Vec<StringMatch>,
-    _subscriptions: Vec<gpui::Subscription>,
-    _search_task: Option<Task<()>>,
+    // When the search is empty, we display date separators between history entries
+    // This vector contains an enum of either a separator or an actual entry
+    separated_items: Vec<HistoryListItem>,
+    _separated_items_task: Option<Task<()>>,
+    search_state: SearchState,
    scrollbar_visibility: bool,
    scrollbar_state: ScrollbarState,
+    _subscriptions: Vec<gpui::Subscription>,
+}
+
+enum SearchState {
+    Empty,
+    Searching {
+        query: SharedString,
+        _task: Task<()>,
+    },
+    Searched {
+        query: SharedString,
+        matches: Vec<StringMatch>,
+    },
+}
+
+enum HistoryListItem {
+    BucketSeparator(TimeBucket),
+    Entry {
+        index: usize,
+        format: EntryTimeFormat,
+    },
+}
+
+impl HistoryListItem {
+    fn entry_index(&self) -> Option<usize> {
+        match self {
+            HistoryListItem::BucketSeparator(_) => None,
+            HistoryListItem::Entry { index, .. } => Some(*index),
+        }
+    }
 }

 impl ThreadHistory {
    pub(crate) fn new(
-        assistant_panel: WeakEntity<AssistantPanel>,
+        agent_panel: WeakEntity<AgentPanel>,
        history_store: Entity<HistoryStore>,
        window: &mut Window,
        cx: &mut Context<Self>,
@@ -50,15 +84,10 @@ impl ThreadHistory {
            cx.subscribe(&search_editor, |this, search_editor, event, cx| {
                if let EditorEvent::BufferEdited = event {
                    let query = search_editor.read(cx).text(cx);
-                    this.search_query = query.into();
-                    this.update_search(cx);
+                    this.search(query.into(), cx);
                }
            });

-        let entries: Arc<Vec<_>> = history_store
-            .update(cx, |store, cx| store.entries(cx))
-            .into();
-
        let history_store_subscription = cx.observe(&history_store, |this, _, cx| {
            this.update_all_entries(cx);
        });
@@ -66,20 +95,22 @@ impl ThreadHistory {
        let scroll_handle = UniformListScrollHandle::default();
        let scrollbar_state = ScrollbarState::new(scroll_handle.clone());

-        Self {
-            assistant_panel,
+        let mut this = Self {
+            agent_panel,
            history_store,
            scroll_handle,
            selected_index: 0,
-            search_query: SharedString::new_static(""),
-            all_entries: entries,
-            matches: Vec::new(),
+            search_state: SearchState::Empty,
+            all_entries: Default::default(),
+            separated_items: Default::default(),
            search_editor,
-            _subscriptions: vec![search_editor_subscription, history_store_subscription],
-            _search_task: None,
            scrollbar_visibility: true,
            scrollbar_state,
-        }
+            _subscriptions: vec![search_editor_subscription, history_store_subscription],
+            _separated_items_task: None,
+        };
+        this.update_all_entries(cx);
+        this
    }

    fn update_all_entries(&mut self, cx: &mut Context<Self>) {
@@ -87,88 +118,167 @@ impl ThreadHistory {
            .history_store
            .update(cx, |store, cx| store.entries(cx))
            .into();
-        self.matches.clear();
-        self.update_search(cx);
-    }

-    fn update_search(&mut self, cx: &mut Context<Self>) {
-        self._search_task.take();
+        self.set_selected_index(0, cx);
+        self.update_separated_items(cx);

-        if self.has_search_query() {
-            self.perform_search(cx);
-        } else {
-            self.matches.clear();
-            self.set_selected_index(0, cx);
-            cx.notify();
+        match &self.search_state {
+            SearchState::Empty => {}
+            SearchState::Searching { query, .. } | SearchState::Searched { query, .. } => {
+                self.search(query.clone(), cx);
+            }
        }
+        cx.notify();
    }

-    fn perform_search(&mut self, cx: &mut Context<Self>) {
-        let query = self.search_query.clone();
+    fn update_separated_items(&mut self, cx: &mut Context<Self>) {
+        self._separated_items_task.take();
+
+        let mut separated_items = std::mem::take(&mut self.separated_items);
+        separated_items.clear();
        let all_entries = self.all_entries.clone();

+        let bg_task = cx.background_spawn(async move {
+            let mut bucket = None;
+            let today = Local::now().naive_local().date();
+
+            for (index, entry) in all_entries.iter().enumerate() {
+                let entry_date = entry
+                    .updated_at()
+                    .with_timezone(&Local)
+                    .naive_local()
+                    .date();
+                let entry_bucket = TimeBucket::from_dates(today, entry_date);
+
+                if Some(entry_bucket) != bucket {
+                    bucket = Some(entry_bucket);
+                    separated_items.push(HistoryListItem::BucketSeparator(entry_bucket));
+                }
+                separated_items.push(HistoryListItem::Entry {
+                    index,
+                    format: entry_bucket.into(),
+                });
+            }
+            separated_items
+        });
+
        let task = cx.spawn(async move |this, cx| {
-            let executor = cx.background_executor().clone();
-
-            let matches = cx
-                .background_spawn(async move {
-                    let mut candidates = Vec::with_capacity(all_entries.len());
-
-                    for (idx, entry) in all_entries.iter().enumerate() {
-                        match entry {
-                            HistoryEntry::Thread(thread) => {
-                                candidates.push(StringMatchCandidate::new(idx, &thread.summary));
-                            }
-                            HistoryEntry::Context(context) => {
-                                candidates.push(StringMatchCandidate::new(idx, &context.title));
-                            }
-                        }
-                    }
-
-                    const MAX_MATCHES: usize = 100;
-
-                    fuzzy::match_strings(
-                        &candidates,
-                        &query,
-                        false,
-                        MAX_MATCHES,
-                        &Default::default(),
-                        executor,
-                    )
-                    .await
-                })
-                .await;
-
+            let separated_items = bg_task.await;
            this.update(cx, |this, cx| {
-                this.matches = matches;
-                this.set_selected_index(0, cx);
+                this.separated_items = separated_items;
                cx.notify();
            })
            .log_err();
        });
-
-        self._search_task = Some(task);
+        self._separated_items_task = Some(task);
    }

-    fn has_search_query(&self) -> bool {
-        !self.search_query.is_empty()
+    fn search(&mut self, query: SharedString, cx: &mut Context<Self>) {
+        if query.is_empty() {
+            self.search_state = SearchState::Empty;
+            cx.notify();
+            return;
+        }
+
+        let all_entries = self.all_entries.clone();
+
+        let fuzzy_search_task = cx.background_spawn({
+            let query = query.clone();
+            let executor = cx.background_executor().clone();
+            async move {
+                let mut candidates = Vec::with_capacity(all_entries.len());
+
+                for (idx, entry) in all_entries.iter().enumerate() {
+                    match entry {
+                        HistoryEntry::Thread(thread) => {
+                            candidates.push(StringMatchCandidate::new(idx, &thread.summary));
+                        }
+                        HistoryEntry::Context(context) => {
+                            candidates.push(StringMatchCandidate::new(idx, &context.title));
+                        }
+                    }
+                }
+
+                const MAX_MATCHES: usize = 100;
+
+                fuzzy::match_strings(
+                    &candidates,
+                    &query,
+                    false,
+                    MAX_MATCHES,
+                    &Default::default(),
+                    executor,
+                )
+                .await
+            }
+        });
+
+        let task = cx.spawn({
+            let query = query.clone();
+            async move |this, cx| {
+                let matches = fuzzy_search_task.await;
+
+                this.update(cx, |this, cx| {
+                    let SearchState::Searching {
+                        query: current_query,
+                        _task,
+                    } = &this.search_state
+                    else {
+                        return;
+                    };
+
+                    if &query == current_query {
+                        this.search_state = SearchState::Searched {
+                            query: query.clone(),
+                            matches,
+                        };
+
+                        this.set_selected_index(0, cx);
+                        cx.notify();
+                    };
+                })
+                .log_err();
+            }
+        });
+
+        self.search_state = SearchState::Searching {
+            query: query.clone(),
+            _task: task,
+        };
+        cx.notify();
    }

    fn matched_count(&self) -> usize {
-        if self.has_search_query() {
-            self.matches.len()
-        } else {
-            self.all_entries.len()
+        match &self.search_state {
+            SearchState::Empty => self.all_entries.len(),
+            SearchState::Searching { .. } => 0,
+            SearchState::Searched { matches, .. } => matches.len(),
+        }
+    }
+
+    fn list_item_count(&self) -> usize {
+        match &self.search_state {
+            SearchState::Empty => self.separated_items.len(),
+            SearchState::Searching { .. } => 0,
+            SearchState::Searched { matches, .. } => matches.len(),
+        }
+    }
+
+    fn search_produced_no_matches(&self) -> bool {
+        match &self.search_state {
+            SearchState::Empty => false,
+            SearchState::Searching { .. } => false,
+            SearchState::Searched { matches, .. } => matches.is_empty(),
        }
    }

    fn get_match(&self, ix: usize) -> Option<&HistoryEntry> {
-        if self.has_search_query() {
-            self.matches
+        match &self.search_state {
+            SearchState::Empty => self.all_entries.get(ix),
+            SearchState::Searching { .. } => None,
+            SearchState::Searched { matches, .. } => matches
                .get(ix)
-                .and_then(|m| self.all_entries.get(m.candidate_id))
-        } else {
-            self.all_entries.get(ix)
+                .and_then(|m| self.all_entries.get(m.candidate_id)),
        }
    }

@@ -270,14 +380,12 @@ impl ThreadHistory {
    fn confirm(&mut self, _: &menu::Confirm, window: &mut Window, cx: &mut Context<Self>) {
        if let Some(entry) = self.get_match(self.selected_index) {
            let task_result = match entry {
-                HistoryEntry::Thread(thread) => self.assistant_panel.update(cx, move |this, cx| {
+                HistoryEntry::Thread(thread) => self.agent_panel.update(cx, move |this, cx| {
                    this.open_thread_by_id(&thread.id, window, cx)
                }),
-                HistoryEntry::Context(context) => {
-                    self.assistant_panel.update(cx, move |this, cx| {
-                        this.open_saved_prompt_editor(context.path.clone(), window, cx)
-                    })
-                }
+                HistoryEntry::Context(context) => self.agent_panel.update(cx, move |this, cx| {
+                    this.open_saved_prompt_editor(context.path.clone(), window, cx)
+                }),
            };

            if let Some(task) = task_result.log_err() {
@@ -297,10 +405,10 @@ impl ThreadHistory {
        if let Some(entry) = self.get_match(self.selected_index) {
            let task_result = match entry {
                HistoryEntry::Thread(thread) => self
-                    .assistant_panel
+                    .agent_panel
                    .update(cx, |this, cx| this.delete_thread(&thread.id, cx)),
                HistoryEntry::Context(context) => self
-                    .assistant_panel
+                    .agent_panel
                    .update(cx, |this, cx| this.delete_context(context.path.clone(), cx)),
            };

@@ -311,6 +419,107 @@ impl ThreadHistory {
            cx.notify();
        }
    }
+
+    fn list_items(
+        &mut self,
+        range: Range<usize>,
+        _window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Vec<AnyElement> {
+        let range_start = range.start;
+
+        match &self.search_state {
+            SearchState::Empty => self
+                .separated_items
+                .get(range)
+                .iter()
+                .flat_map(|items| {
+                    items
+                        .iter()
+                        .map(|item| self.render_list_item(item.entry_index(), item, vec![], cx))
+                })
+                .collect(),
+            SearchState::Searched { matches, .. } => matches[range]
+                .iter()
+                .enumerate()
+                .map(|(ix, m)| {
+                    self.render_list_item(
+                        Some(range_start + ix),
+                        &HistoryListItem::Entry {
+                            index: m.candidate_id,
+                            format: EntryTimeFormat::DateAndTime,
+                        },
+                        m.positions.clone(),
+                        cx,
+                    )
+                })
+                .collect(),
+            SearchState::Searching { .. } => {
+                vec![]
+            }
+        }
+    }
+
+    fn render_list_item(
+        &self,
+        list_entry_ix: Option<usize>,
+        item: &HistoryListItem,
+        highlight_positions: Vec<usize>,
+        cx: &App,
+    ) -> AnyElement {
+        match item {
+            HistoryListItem::Entry { index, format } => match self.all_entries.get(*index) {
+                Some(entry) => h_flex()
+                    .w_full()
+                    .pb_1()
+                    .child(self.render_history_entry(
+                        entry,
+                        list_entry_ix == Some(self.selected_index),
+                        highlight_positions,
+                        *format,
+                    ))
+                    .into_any(),
+                None => Empty.into_any_element(),
+            },
+            HistoryListItem::BucketSeparator(bucket) => div()
+                .px(DynamicSpacing::Base06.rems(cx))
+                .pt_2()
+                .pb_1()
+                .child(
+                    Label::new(bucket.to_string())
+                        .size(LabelSize::XSmall)
+                        .color(Color::Muted),
+                )
+                .into_any_element(),
+        }
+    }
+
+    fn render_history_entry(
+        &self,
+        entry: &HistoryEntry,
+        is_active: bool,
+        highlight_positions: Vec<usize>,
+        format: EntryTimeFormat,
+    ) -> AnyElement {
+        match entry {
+            HistoryEntry::Thread(thread) => PastThread::new(
+                thread.clone(),
+                self.agent_panel.clone(),
+                is_active,
+                highlight_positions,
+                format,
+            )
+            .into_any_element(),
+            HistoryEntry::Context(context) => PastContext::new(
+                context.clone(),
+                self.agent_panel.clone(),
+                is_active,
+                highlight_positions,
+                format,
+            )
+            .into_any_element(),
+        }
+    }
 }

 impl Focusable for ThreadHistory {
@@ -321,8 +530,6 @@ impl Focusable for ThreadHistory {

 impl Render for ThreadHistory {
    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        let selected_index = self.selected_index;
-
        v_flex()
            .key_context("ThreadHistory")
            .size_full()
@@ -366,7 +573,7 @@ impl Render for ThreadHistory {
                                    .size(LabelSize::Small),
                            ),
                        )
-                } else if self.has_search_query() && self.matches.is_empty() {
+                } else if self.search_produced_no_matches() {
                    view.justify_center().child(
                        h_flex().w_full().justify_center().child(
                            Label::new("No threads match your search.").size(LabelSize::Small),
@@ -378,57 +585,8 @@ impl Render for ThreadHistory {
                            uniform_list(
                                cx.entity().clone(),
                                "thread-history",
-                                self.matched_count(),
-                                move |history, range, _window, _cx| {
-                                    let range_start = range.start;
-                                    let assistant_panel = history.assistant_panel.clone();
-
-                                    let render_item = |index: usize,
-                                                       entry: &HistoryEntry,
-                                                       highlight_positions: Vec<usize>|
-                                     -> Div {
-                                        h_flex().w_full().pb_1().child(match entry {
-                                            HistoryEntry::Thread(thread) => PastThread::new(
-                                                thread.clone(),
-                                                assistant_panel.clone(),
-                                                selected_index == index + range_start,
-                                                highlight_positions,
-                                            )
-                                            .into_any_element(),
-                                            HistoryEntry::Context(context) => PastContext::new(
-                                                context.clone(),
-                                                assistant_panel.clone(),
-                                                selected_index == index + range_start,
-                                                highlight_positions,
-                                            )
-                                            .into_any_element(),
-                                        })
-                                    };
-
-                                    if history.has_search_query() {
-                                        history.matches[range]
-                                            .iter()
-                                            .enumerate()
-                                            .filter_map(|(index, m)| {
-                                                history.all_entries.get(m.candidate_id).map(
-                                                    |entry| {
-                                                        render_item(
-                                                            index,
-                                                            entry,
-                                                            m.positions.clone(),
-                                                        )
-                                                    },
-                                                )
-                                            })
-                                            .collect()
-                                    } else {
-                                        history.all_entries[range]
-                                            .iter()
-                                            .enumerate()
-                                            .map(|(index, entry)| render_item(index, entry, vec![]))
-                                            .collect()
-                                    }
-                                },
+                                self.list_item_count(),
+                                Self::list_items,
                            )
                            .p_1()
                            .track_scroll(self.scroll_handle.clone())
@@ -445,23 +603,26 @@ impl Render for ThreadHistory {
 #[derive(IntoElement)]
 pub struct PastThread {
    thread: SerializedThreadMetadata,
-    assistant_panel: WeakEntity<AssistantPanel>,
+    agent_panel: WeakEntity<AgentPanel>,
    selected: bool,
    highlight_positions: Vec<usize>,
+    timestamp_format: EntryTimeFormat,
 }

 impl PastThread {
    pub fn new(
        thread: SerializedThreadMetadata,
-        assistant_panel: WeakEntity<AssistantPanel>,
+        agent_panel: WeakEntity<AgentPanel>,
        selected: bool,
        highlight_positions: Vec<usize>,
+        timestamp_format: EntryTimeFormat,
    ) -> Self {
        Self {
            thread,
-            assistant_panel,
+            agent_panel,
            selected,
            highlight_positions,
+            timestamp_format,
        }
    }
 }
@@ -470,13 +631,10 @@ impl RenderOnce for PastThread {
    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
        let summary = self.thread.summary;

-        let thread_timestamp = time_format::format_localized_timestamp(
-            OffsetDateTime::from_unix_timestamp(self.thread.updated_at.timestamp()).unwrap(),
-            OffsetDateTime::now_utc(),
-            self.assistant_panel
-                .update(cx, |this, _cx| this.local_timezone())
-                .unwrap_or(UtcOffset::UTC),
-            time_format::TimestampFormat::EnhancedAbsolute,
+        let thread_timestamp = self.timestamp_format.format_timestamp(
+            &self.agent_panel,
+            self.thread.updated_at.timestamp(),
+            cx,
        );

        ListItem::new(SharedString::from(self.thread.id.to_string()))
@@ -507,10 +665,10 @@ impl RenderOnce for PastThread {
                                Tooltip::for_action("Delete", &RemoveSelectedThread, window, cx)
                            })
                            .on_click({
-                                let assistant_panel = self.assistant_panel.clone();
+                                let agent_panel = self.agent_panel.clone();
                                let id = self.thread.id.clone();
                                move |_event, _window, cx| {
-                                    assistant_panel
+                                    agent_panel
                                        .update(cx, |this, cx| {
                                            this.delete_thread(&id, cx).detach_and_log_err(cx);
                                        })
@@ -520,10 +678,10 @@ impl RenderOnce for PastThread {
                    ),
            )
            .on_click({
-                let assistant_panel = self.assistant_panel.clone();
+                let agent_panel = self.agent_panel.clone();
                let id = self.thread.id.clone();
                move |_event, window, cx| {
-                    assistant_panel
+                    agent_panel
                        .update(cx, |this, cx| {
                            this.open_thread_by_id(&id, window, cx)
                                .detach_and_log_err(cx);
@@ -537,23 +695,26 @@ impl RenderOnce for PastThread {
 #[derive(IntoElement)]
 pub struct PastContext {
    context: SavedContextMetadata,
-    assistant_panel: WeakEntity<AssistantPanel>,
+    agent_panel: WeakEntity<AgentPanel>,
    selected: bool,
    highlight_positions: Vec<usize>,
+    timestamp_format: EntryTimeFormat,
 }

 impl PastContext {
    pub fn new(
        context: SavedContextMetadata,
-        assistant_panel: WeakEntity<AssistantPanel>,
+        agent_panel: WeakEntity<AgentPanel>,
        selected: bool,
        highlight_positions: Vec<usize>,
+        timestamp_format: EntryTimeFormat,
    ) -> Self {
        Self {
            context,
-            assistant_panel,
+            agent_panel,
            selected,
            highlight_positions,
+            timestamp_format,
        }
    }
 }
@@ -561,13 +722,10 @@ impl PastContext {
 impl RenderOnce for PastContext {
    fn render(self, _window: &mut Window, cx: &mut App) -> impl IntoElement {
        let summary = self.context.title;
-        let context_timestamp = time_format::format_localized_timestamp(
-            OffsetDateTime::from_unix_timestamp(self.context.mtime.timestamp()).unwrap(),
-            OffsetDateTime::now_utc(),
-            self.assistant_panel
-                .update(cx, |this, _cx| this.local_timezone())
-                .unwrap_or(UtcOffset::UTC),
-            time_format::TimestampFormat::EnhancedAbsolute,
+        let context_timestamp = self.timestamp_format.format_timestamp(
+            &self.agent_panel,
+            self.context.mtime.timestamp(),
+            cx,
        );

        ListItem::new(SharedString::from(
@@ -600,10 +758,10 @@ impl RenderOnce for PastContext {
                            Tooltip::for_action("Delete", &RemoveSelectedThread, window, cx)
                        })
                        .on_click({
-                            let assistant_panel = self.assistant_panel.clone();
+                            let agent_panel = self.agent_panel.clone();
                            let path = self.context.path.clone();
                            move |_event, _window, cx| {
-                                assistant_panel
+                                agent_panel
                                    .update(cx, |this, cx| {
                                        this.delete_context(path.clone(), cx)
                                            .detach_and_log_err(cx);
@@ -614,10 +772,10 @@ impl RenderOnce for PastContext {
                ),
        )
        .on_click({
-            let assistant_panel = self.assistant_panel.clone();
+            let agent_panel = self.agent_panel.clone();
            let path = self.context.path.clone();
            move |_event, window, cx| {
-                assistant_panel
+                agent_panel
                    .update(cx, |this, cx| {
                        this.open_saved_prompt_editor(path.clone(), window, cx)
                            .detach_and_log_err(cx);
@@ -627,3 +785,137 @@ impl RenderOnce for PastContext {
        })
    }
 }
+
+#[derive(Clone, Copy)]
+pub enum EntryTimeFormat {
+    DateAndTime,
+    TimeOnly,
+}
+
+impl EntryTimeFormat {
+    fn format_timestamp(
+        &self,
+        agent_panel: &WeakEntity<AgentPanel>,
+        timestamp: i64,
+        cx: &App,
+    ) -> String {
+        let timestamp = OffsetDateTime::from_unix_timestamp(timestamp).unwrap();
+        let timezone = agent_panel
+            .read_with(cx, |this, _cx| this.local_timezone())
+            .unwrap_or(UtcOffset::UTC);
+
+        match &self {
+            EntryTimeFormat::DateAndTime => time_format::format_localized_timestamp(
+                timestamp,
+                OffsetDateTime::now_utc(),
+                timezone,
+                time_format::TimestampFormat::EnhancedAbsolute,
+            ),
+            EntryTimeFormat::TimeOnly => time_format::format_time(timestamp),
+        }
+    }
+}
+
+impl From<TimeBucket> for EntryTimeFormat {
+    fn from(bucket: TimeBucket) -> Self {
+        match bucket {
+            TimeBucket::Today => EntryTimeFormat::TimeOnly,
+            TimeBucket::Yesterday => EntryTimeFormat::TimeOnly,
+            TimeBucket::ThisWeek => EntryTimeFormat::DateAndTime,
+            TimeBucket::PastWeek => EntryTimeFormat::DateAndTime,
+            TimeBucket::All => EntryTimeFormat::DateAndTime,
+        }
+    }
+}
+
+#[derive(PartialEq, Eq, Clone, Copy, Debug)]
+enum TimeBucket {
+    Today,
+    Yesterday,
+    ThisWeek,
+    PastWeek,
+    All,
+}
+
+impl TimeBucket {
+    fn from_dates(reference: NaiveDate, date: NaiveDate) -> Self {
+        if date == reference {
+            return TimeBucket::Today;
+        }
+
+        if date == reference - TimeDelta::days(1) {
+            return TimeBucket::Yesterday;
+        }
+
+        let week = date.iso_week();
+
+        if reference.iso_week() == week {
+            return TimeBucket::ThisWeek;
+        }
+
+        let last_week = (reference - TimeDelta::days(7)).iso_week();
+
+        if week == last_week {
+            return TimeBucket::PastWeek;
+        }
+
+        TimeBucket::All
+    }
+}
+
+impl Display for TimeBucket {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            TimeBucket::Today => write!(f, "Today"),
+            TimeBucket::Yesterday => write!(f, "Yesterday"),
+            TimeBucket::ThisWeek => write!(f, "This Week"),
+            TimeBucket::PastWeek => write!(f, "Past Week"),
+            TimeBucket::All => write!(f, "All"),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use chrono::NaiveDate;
+
+    #[test]
+    fn test_time_bucket_from_dates() {
+        let today = NaiveDate::from_ymd_opt(2023, 1, 15).unwrap();
+
+        let date = today;
+        assert_eq!(TimeBucket::from_dates(today, date), TimeBucket::Today);
+
+        let date = NaiveDate::from_ymd_opt(2023, 1, 14).unwrap();
+        assert_eq!(TimeBucket::from_dates(today, date), TimeBucket::Yesterday);
+
+        let date = NaiveDate::from_ymd_opt(2023, 1, 13).unwrap();
+        assert_eq!(TimeBucket::from_dates(today, date), TimeBucket::ThisWeek);
+
+        let date = NaiveDate::from_ymd_opt(2023, 1, 11).unwrap();
+        assert_eq!(TimeBucket::from_dates(today, date), TimeBucket::ThisWeek);
+
+        let date = NaiveDate::from_ymd_opt(2023, 1, 8).unwrap();
+        assert_eq!(TimeBucket::from_dates(today, date), TimeBucket::PastWeek);
+
+        let date = NaiveDate::from_ymd_opt(2023, 1, 5).unwrap();
+        assert_eq!(TimeBucket::from_dates(today, date), TimeBucket::PastWeek);
+
+        // All: not in this week or last week
+        let date = NaiveDate::from_ymd_opt(2023, 1, 1).unwrap();
+        assert_eq!(TimeBucket::from_dates(today, date), TimeBucket::All);
+
+        // Test year boundary cases
+        let new_year = NaiveDate::from_ymd_opt(2023, 1, 1).unwrap();
+
+        let date = NaiveDate::from_ymd_opt(2022, 12, 31).unwrap();
+        assert_eq!(
+            TimeBucket::from_dates(new_year, date),
+            TimeBucket::Yesterday
+        );
+
+        let date = NaiveDate::from_ymd_opt(2022, 12, 28).unwrap();
+        assert_eq!(TimeBucket::from_dates(new_year, date), TimeBucket::ThisWeek);
+    }
+}
--- a/crates/agent/src/thread_store.rs
+++ b/crates/agent/src/thread_store.rs
@@ -5,7 +5,7 @@ use std::rc::Rc;
 use std::sync::Arc;

 use anyhow::{Context as _, Result, anyhow};
-use assistant_settings::{AgentProfile, AgentProfileId, AssistantSettings};
+use assistant_settings::{AgentProfile, AgentProfileId, AssistantSettings, CompletionMode};
 use assistant_tool::{ToolId, ToolSource, ToolWorkingSet};
 use chrono::{DateTime, Utc};
 use collections::HashMap;
@@ -28,6 +28,7 @@ use prompt_store::{
 };
 use serde::{Deserialize, Serialize};
 use settings::{Settings as _, SettingsStore};
+use ui::Window;
 use util::ResultExt as _;

 use crate::context_server_tool::ContextServerTool;
@@ -58,6 +59,8 @@ impl SharedProjectContext {
    }
 }

+pub type TextThreadStore = assistant_context_editor::ContextStore;
+
 pub struct ThreadStore {
    project: Entity<Project>,
    tools: Entity<ToolWorkingSet>,
@@ -361,6 +364,10 @@ impl ThreadStore {
        self.threads.len()
    }

+    pub fn unordered_threads(&self) -> impl Iterator<Item = &SerializedThreadMetadata> {
+        self.threads.iter()
+    }
+
    pub fn reverse_chronological_threads(&self) -> Vec<SerializedThreadMetadata> {
        let mut threads = self.threads.iter().cloned().collect::<Vec<_>>();
        threads.sort_unstable_by_key(|thread| std::cmp::Reverse(thread.updated_at));
@@ -382,18 +389,20 @@ impl ThreadStore {
    pub fn open_thread(
        &self,
        id: &ThreadId,
+        window: &mut Window,
        cx: &mut Context<Self>,
    ) -> Task<Result<Entity<Thread>>> {
        let id = id.clone();
        let database_future = ThreadsDatabase::global_future(cx);
-        cx.spawn(async move |this, cx| {
+        let this = cx.weak_entity();
+        window.spawn(cx, async move |cx| {
            let database = database_future.await.map_err(|err| anyhow!(err))?;
            let thread = database
                .try_find_thread(id.clone())
                .await?
                .ok_or_else(|| anyhow!("no thread found with ID: {id:?}"))?;

-            let thread = this.update(cx, |this, cx| {
+            let thread = this.update_in(cx, |this, window, cx| {
                cx.new(|cx| {
                    Thread::deserialize(
                        id.clone(),
@@ -402,6 +411,7 @@ impl ThreadStore {
                        this.tools.clone(),
                        this.prompt_builder.clone(),
                        this.project_context.clone(),
+                        window,
                        cx,
                    )
                })
@@ -645,6 +655,10 @@ pub struct SerializedThread {
    pub exceeded_window_error: Option<ExceededWindowError>,
    #[serde(default)]
    pub model: Option<SerializedLanguageModel>,
+    #[serde(default)]
+    pub completion_mode: Option<CompletionMode>,
+    #[serde(default)]
+    pub profile: Option<AgentProfileId>,
 }

 #[derive(Serialize, Deserialize, Debug)]
@@ -764,6 +778,7 @@ pub struct SerializedToolResult {
    pub tool_use_id: LanguageModelToolUseId,
    pub is_error: bool,
    pub content: Arc<str>,
+    pub output: Option<serde_json::Value>,
 }

 #[derive(Serialize, Deserialize)]
@@ -788,6 +803,8 @@ impl LegacySerializedThread {
            detailed_summary_state: DetailedSummaryState::default(),
            exceeded_window_error: None,
            model: None,
+            completion_mode: None,
+            profile: None,
        }
    }
 }
--- a/crates/agent/src/tool_use.rs
+++ b/crates/agent/src/tool_use.rs
@@ -1,16 +1,17 @@
 use std::sync::Arc;

 use anyhow::Result;
-use assistant_tool::{AnyToolCard, Tool, ToolUseStatus, ToolWorkingSet};
+use assistant_tool::{AnyToolCard, Tool, ToolResultOutput, ToolUseStatus, ToolWorkingSet};
 use collections::HashMap;
 use futures::FutureExt as _;
 use futures::future::Shared;
 use gpui::{App, Entity, SharedString, Task};
 use language_model::{
-    ConfiguredModel, LanguageModel, LanguageModelRequestMessage, LanguageModelToolResult,
-    LanguageModelToolUse, LanguageModelToolUseId, MessageContent, Role,
+    ConfiguredModel, LanguageModel, LanguageModelRequest, LanguageModelToolResult,
+    LanguageModelToolUse, LanguageModelToolUseId, Role,
 };
-use ui::IconName;
+use project::Project;
+use ui::{IconName, Window};
 use util::truncate_lines_to_byte_limit;

 use crate::thread::{MessageId, PromptId, ThreadId};
@@ -54,6 +55,9 @@ impl ToolUseState {
    pub fn from_serialized_messages(
        tools: Entity<ToolWorkingSet>,
        messages: &[SerializedMessage],
+        project: Entity<Project>,
+        window: &mut Window,
+        cx: &mut App,
    ) -> Self {
        let mut this = Self::new(tools);
        let mut tool_names_by_id = HashMap::default();
@@ -93,12 +97,23 @@ impl ToolUseState {
                            this.tool_results.insert(
                                tool_use_id.clone(),
                                LanguageModelToolResult {
-                                    tool_use_id,
+                                    tool_use_id: tool_use_id.clone(),
                                    tool_name: tool_use.clone(),
                                    is_error: tool_result.is_error,
                                    content: tool_result.content.clone(),
+                                    output: tool_result.output.clone(),
                                },
                            );
+
+                            if let Some(tool) = this.tools.read(cx).tool(tool_use, cx) {
+                                if let Some(output) = tool_result.output.clone() {
+                                    if let Some(card) =
+                                        tool.deserialize_card(output, project.clone(), window, cx)
+                                    {
+                                        this.tool_result_cards.insert(tool_use_id, card);
+                                    }
+                                }
+                            }
                        }
                    }
                }
@@ -110,20 +125,28 @@ impl ToolUseState {
    }

    pub fn cancel_pending(&mut self) -> Vec<PendingToolUse> {
-        let mut pending_tools = Vec::new();
-        for (tool_use_id, tool_use) in self.pending_tool_uses_by_id.drain() {
-            self.tool_results.insert(
-                tool_use_id.clone(),
-                LanguageModelToolResult {
-                    tool_use_id,
-                    tool_name: tool_use.name.clone(),
-                    content: "Tool canceled by user".into(),
-                    is_error: true,
-                },
-            );
-            pending_tools.push(tool_use.clone());
-        }
-        pending_tools
+        let mut cancelled_tool_uses = Vec::new();
+        self.pending_tool_uses_by_id
+            .retain(|tool_use_id, tool_use| {
+                if matches!(tool_use.status, PendingToolUseStatus::Error { .. }) {
+                    return true;
+                }
+
+                let content = "Tool canceled by user".into();
+                self.tool_results.insert(
+                    tool_use_id.clone(),
+                    LanguageModelToolResult {
+                        tool_use_id: tool_use_id.clone(),
+                        tool_name: tool_use.name.clone(),
+                        content,
+                        output: None,
+                        is_error: true,
+                    },
+                );
+                cancelled_tool_uses.push(tool_use.clone());
+                false
+            });
+        cancelled_tool_uses
    }

    pub fn pending_tool_uses(&self) -> Vec<&PendingToolUse> {
@@ -331,7 +354,7 @@ impl ToolUseState {
        tool_use_id: LanguageModelToolUseId,
        ui_text: impl Into<Arc<str>>,
        input: serde_json::Value,
-        messages: Arc<Vec<LanguageModelRequestMessage>>,
+        request: Arc<LanguageModelRequest>,
        tool: Arc<dyn Tool>,
    ) {
        if let Some(tool_use) = self.pending_tool_uses_by_id.get_mut(&tool_use_id) {
@@ -340,7 +363,7 @@ impl ToolUseState {
            let confirmation = Confirmation {
                tool_use_id,
                input,
-                messages,
+                request,
                tool,
                ui_text,
            };
@@ -352,7 +375,7 @@ impl ToolUseState {
        &mut self,
        tool_use_id: LanguageModelToolUseId,
        tool_name: Arc<str>,
-        output: Result<String>,
+        output: Result<ToolResultOutput>,
        configured_model: Option<&ConfiguredModel>,
    ) -> Option<PendingToolUse> {
        let metadata = self.tool_use_metadata_by_id.remove(&tool_use_id);
@@ -372,7 +395,8 @@ impl ToolUseState {
        );

        match output {
-            Ok(tool_result) => {
+            Ok(output) => {
+                let tool_result = output.content;
                const BYTES_PER_TOKEN_ESTIMATE: usize = 3;

                // Protect from clearly large output
@@ -399,6 +423,7 @@ impl ToolUseState {
                        tool_name,
                        content: tool_result.into(),
                        is_error: false,
+                        output: output.output,
                    },
                );
                self.pending_tool_uses_by_id.remove(&tool_use_id)
@@ -411,6 +436,7 @@ impl ToolUseState {
                        tool_name,
                        content: err.to_string().into(),
                        is_error: true,
+                        output: None,
                    },
                );

@@ -423,71 +449,20 @@ impl ToolUseState {
        }
    }

-    pub fn attach_tool_uses(
-        &self,
-        message_id: MessageId,
-        request_message: &mut LanguageModelRequestMessage,
-    ) {
-        if let Some(tool_uses) = self.tool_uses_by_assistant_message.get(&message_id) {
-            for tool_use in tool_uses {
-                if self.tool_results.contains_key(&tool_use.id) {
-                    // Do not send tool uses until they are completed
-                    request_message
-                        .content
-                        .push(MessageContent::ToolUse(tool_use.clone()));
-                } else {
-                    log::debug!(
-                        "skipped tool use {:?} because it is still pending",
-                        tool_use
-                    );
-                }
-            }
-        }
-    }
-
    pub fn has_tool_results(&self, assistant_message_id: MessageId) -> bool {
        self.tool_uses_by_assistant_message
            .contains_key(&assistant_message_id)
    }

-    pub fn tool_results_message(
+    pub fn tool_results(
        &self,
        assistant_message_id: MessageId,
-    ) -> Option<LanguageModelRequestMessage> {
-        let tool_uses = self
-            .tool_uses_by_assistant_message
-            .get(&assistant_message_id)?;
-
-        if tool_uses.is_empty() {
-            return None;
-        }
-
-        let mut request_message = LanguageModelRequestMessage {
-            role: Role::User,
-            content: vec![],
-            cache: false,
-        };
-
-        for tool_use in tool_uses {
-            if let Some(tool_result) = self.tool_results.get(&tool_use.id) {
-                request_message
-                    .content
-                    .push(MessageContent::ToolResult(LanguageModelToolResult {
-                        tool_use_id: tool_use.id.clone(),
-                        tool_name: tool_result.tool_name.clone(),
-                        is_error: tool_result.is_error,
-                        content: if tool_result.content.is_empty() {
-                            // Surprisingly, the API fails if we return an empty string here.
-                            // It thinks we are sending a tool use without a tool result.
-                            "<Tool returned an empty string>".into()
-                        } else {
-                            tool_result.content.clone()
-                        },
-                    }));
-            }
-        }
-
-        Some(request_message)
+    ) -> impl Iterator<Item = (&LanguageModelToolUse, Option<&LanguageModelToolResult>)> {
+        self.tool_uses_by_assistant_message
+            .get(&assistant_message_id)
+            .into_iter()
+            .flatten()
+            .map(|tool_use| (tool_use, self.tool_results.get(&tool_use.id)))
    }
 }

@@ -508,7 +483,7 @@ pub struct Confirmation {
    pub tool_use_id: LanguageModelToolUseId,
    pub input: serde_json::Value,
    pub ui_text: Arc<str>,
-    pub messages: Arc<Vec<LanguageModelRequestMessage>>,
+    pub request: Arc<LanguageModelRequest>,
    pub tool: Arc<dyn Tool>,
 }

--- a/crates/agent/src/trial_markdown.md
+++ b/crates/agent/src/trial_markdown.md
@@ -0,0 +1,3 @@
+# Build better with Zed Pro
+
+Try [Zed Pro](https://zed.dev/pricing) for free for 14 days - no credit card required. Only $20/month afterward. Cancel anytime.
--- a/crates/agent/src/ui.rs
+++ b/crates/agent/src/ui.rs
@@ -2,6 +2,7 @@ mod agent_notification;
 mod animated_label;
 mod context_pill;
 mod max_mode_tooltip;
+mod onboarding_modal;
 pub mod preview;
 mod upsell;

@@ -9,3 +10,4 @@ pub use agent_notification::*;
 pub use animated_label::*;
 pub use context_pill::*;
 pub use max_mode_tooltip::*;
+pub use onboarding_modal::*;
--- a/crates/agent/src/ui/context_pill.rs
+++ b/crates/agent/src/ui/context_pill.rs
@@ -16,7 +16,8 @@ use crate::context::{
    AgentContext, AgentContextHandle, ContextId, ContextKind, DirectoryContext,
    DirectoryContextHandle, FetchedUrlContext, FileContext, FileContextHandle, ImageContext,
    ImageStatus, RulesContext, RulesContextHandle, SelectionContext, SelectionContextHandle,
-    SymbolContext, SymbolContextHandle, ThreadContext, ThreadContextHandle,
+    SymbolContext, SymbolContextHandle, TextThreadContext, TextThreadContextHandle, ThreadContext,
+    ThreadContextHandle,
 };

 #[derive(IntoElement)]
@@ -301,6 +302,7 @@ impl AddedContext {
            AgentContextHandle::Selection(handle) => Self::pending_selection(handle, cx),
            AgentContextHandle::FetchedUrl(handle) => Some(Self::fetched_url(handle)),
            AgentContextHandle::Thread(handle) => Some(Self::pending_thread(handle, cx)),
+            AgentContextHandle::TextThread(handle) => Some(Self::pending_text_thread(handle, cx)),
            AgentContextHandle::Rules(handle) => Self::pending_rules(handle, prompt_store, cx),
            AgentContextHandle::Image(handle) => Some(Self::image(handle)),
        }
@@ -314,6 +316,7 @@ impl AddedContext {
            AgentContext::Selection(context) => Self::attached_selection(context, cx),
            AgentContext::FetchedUrl(context) => Self::fetched_url(context.clone()),
            AgentContext::Thread(context) => Self::attached_thread(context),
+            AgentContext::TextThread(context) => Self::attached_text_thread(context),
            AgentContext::Rules(context) => Self::attached_rules(context),
            AgentContext::Image(context) => Self::image(context.clone()),
        }
@@ -520,6 +523,43 @@ impl AddedContext {
        }
    }

+    fn pending_text_thread(handle: TextThreadContextHandle, cx: &App) -> AddedContext {
+        AddedContext {
+            kind: ContextKind::TextThread,
+            name: handle.title(cx),
+            parent: None,
+            tooltip: None,
+            icon_path: None,
+            status: ContextStatus::Ready,
+            render_hover: {
+                let context = handle.context.clone();
+                Some(Rc::new(move |_, cx| {
+                    let text = context.read(cx).to_xml(cx);
+                    ContextPillHover::new_text(text.into(), cx).into()
+                }))
+            },
+            handle: AgentContextHandle::TextThread(handle),
+        }
+    }
+
+    fn attached_text_thread(context: &TextThreadContext) -> AddedContext {
+        AddedContext {
+            kind: ContextKind::TextThread,
+            name: context.title.clone(),
+            parent: None,
+            tooltip: None,
+            icon_path: None,
+            status: ContextStatus::Ready,
+            render_hover: {
+                let text = context.text.clone();
+                Some(Rc::new(move |_, cx| {
+                    ContextPillHover::new_text(text.clone(), cx).into()
+                }))
+            },
+            handle: AgentContextHandle::TextThread(context.handle.clone()),
+        }
+    }
+
    fn pending_rules(
        handle: RulesContextHandle,
        prompt_store: Option<&Entity<PromptStore>>,
--- a/crates/agent/src/ui/max_mode_tooltip.rs
+++ b/crates/agent/src/ui/max_mode_tooltip.rs
@@ -1,24 +1,50 @@
 use gpui::{Context, IntoElement, Render, Window};
 use ui::{prelude::*, tooltip_container};

-pub struct MaxModeTooltip;
+pub struct MaxModeTooltip {
+    selected: bool,
+}

 impl MaxModeTooltip {
-    pub fn new(_cx: &mut Context<Self>) -> Self {
-        Self
+    pub fn new() -> Self {
+        Self { selected: false }
+    }
+
+    pub fn selected(mut self, selected: bool) -> Self {
+        self.selected = selected;
+        self
    }
 }

 impl Render for MaxModeTooltip {
-    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        tooltip_container(_window, cx, |this, _, _| {
+    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        tooltip_container(window, cx, |this, _, _| {
            this.gap_1()
-                .child(
-                    h_flex()
-                        .gap_1p5()
-                        .child(Icon::new(IconName::ZedMaxMode).size(IconSize::Small))
-                        .child(Label::new("Zed's Max Mode"))
-                )
+                .map(|header| if self.selected {
+                    header.child(
+                        h_flex()
+                            .justify_between()
+                            .child(
+                                h_flex()
+                                    .gap_1p5()
+                                    .child(Icon::new(IconName::ZedMaxMode).size(IconSize::Small).color(Color::Accent))
+                                    .child(Label::new("Zed's Max Mode"))
+                            )
+                            .child(
+                                h_flex()
+                                    .gap_0p5()
+                                    .child(Icon::new(IconName::Check).size(IconSize::XSmall).color(Color::Accent))
+                                    .child(Label::new("Turned On").size(LabelSize::XSmall).color(Color::Accent))
+                            )
+                    )
+                } else {
+                    header.child(
+                        h_flex()
+                            .gap_1p5()
+                            .child(Icon::new(IconName::ZedMaxMode).size(IconSize::Small))
+                            .child(Label::new("Zed's Max Mode"))
+                    )
+                })
                .child(
                    div()
                        .max_w_72()
--- a/crates/agent/src/ui/onboarding_modal.rs
+++ b/crates/agent/src/ui/onboarding_modal.rs
@@ -0,0 +1,174 @@
+use gpui::{
+    ClickEvent, DismissEvent, Entity, EventEmitter, FocusHandle, Focusable, MouseDownEvent, Render,
+};
+use ui::{TintColor, Vector, VectorName, prelude::*};
+use workspace::{ModalView, Workspace};
+
+use crate::agent_panel::AgentPanel;
+
+macro_rules! agent_onboarding_event {
+    ($name:expr) => {
+        telemetry::event!($name, source = "Agent Onboarding");
+    };
+    ($name:expr, $($key:ident $(= $value:expr)?),+ $(,)?) => {
+        telemetry::event!($name, source = "Agent Onboarding", $($key $(= $value)?),+);
+    };
+}
+
+pub struct AgentOnboardingModal {
+    focus_handle: FocusHandle,
+    workspace: Entity<Workspace>,
+}
+
+impl AgentOnboardingModal {
+    pub fn toggle(workspace: &mut Workspace, window: &mut Window, cx: &mut Context<Workspace>) {
+        let workspace_entity = cx.entity();
+        workspace.toggle_modal(window, cx, |_window, cx| Self {
+            workspace: workspace_entity,
+            focus_handle: cx.focus_handle(),
+        });
+    }
+
+    fn open_panel(&mut self, _: &ClickEvent, window: &mut Window, cx: &mut Context<Self>) {
+        self.workspace.update(cx, |workspace, cx| {
+            workspace.focus_panel::<AgentPanel>(window, cx);
+        });
+
+        cx.emit(DismissEvent);
+
+        agent_onboarding_event!("Open Panel Clicked");
+    }
+
+    fn view_blog(&mut self, _: &ClickEvent, _: &mut Window, cx: &mut Context<Self>) {
+        cx.open_url("http://zed.dev/blog/fastest-ai-code-editor");
+        cx.notify();
+
+        agent_onboarding_event!("Blog Link Clicked");
+    }
+
+    fn cancel(&mut self, _: &menu::Cancel, _: &mut Window, cx: &mut Context<Self>) {
+        cx.emit(DismissEvent);
+    }
+}
+
+impl EventEmitter<DismissEvent> for AgentOnboardingModal {}
+
+impl Focusable for AgentOnboardingModal {
+    fn focus_handle(&self, _cx: &App) -> FocusHandle {
+        self.focus_handle.clone()
+    }
+}
+
+impl ModalView for AgentOnboardingModal {}
+
+impl Render for AgentOnboardingModal {
+    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        let window_height = window.viewport_size().height;
+        let max_height = window_height - px(200.);
+
+        let base = v_flex()
+            .id("agent-onboarding")
+            .key_context("AgentOnboardingModal")
+            .relative()
+            .w(px(450.))
+            .h_full()
+            .max_h(max_height)
+            .p_4()
+            .gap_2()
+            .elevation_3(cx)
+            .track_focus(&self.focus_handle(cx))
+            .overflow_hidden()
+            .on_action(cx.listener(Self::cancel))
+            .on_action(cx.listener(|_, _: &menu::Cancel, _window, cx| {
+                agent_onboarding_event!("Canceled", trigger = "Action");
+                cx.emit(DismissEvent);
+            }))
+            .on_any_mouse_down(cx.listener(|this, _: &MouseDownEvent, window, _cx| {
+                this.focus_handle.focus(window);
+            }))
+            .child(
+                div()
+                    .absolute()
+                    .top_0()
+                    .right(px(-1.0))
+                    .w(px(441.))
+                    .h(px(240.))
+                    .child(
+                        Vector::new(VectorName::Grid, rems_from_px(441.), rems_from_px(240.))
+                            .color(ui::Color::Custom(cx.theme().colors().text.alpha(0.05))),
+                    ),
+            )
+            .child(
+                div()
+                    .absolute()
+                    .top(px(-8.0))
+                    .right_0()
+                    .w(px(400.))
+                    .h(px(92.))
+                    .child(
+                        Vector::new(VectorName::AiGrid, rems_from_px(400.), rems_from_px(92.))
+                            .color(ui::Color::Custom(cx.theme().colors().text.alpha(0.32))),
+                    ),
+            )
+            .child(
+                div()
+                    .absolute()
+                    .inset_0()
+                    .size_full()
+                    .bg(gpui::linear_gradient(
+                        175.,
+                        gpui::linear_color_stop(
+                            cx.theme().colors().elevated_surface_background,
+                            0.,
+                        ),
+                        gpui::linear_color_stop(
+                            cx.theme().colors().elevated_surface_background.opacity(0.),
+                            0.8,
+                        ),
+                    )),
+            )
+            .child(
+                v_flex()
+                    .w_full()
+                    .gap_1()
+                    .child(
+                        Label::new("Introducing")
+                            .size(LabelSize::Small)
+                            .color(Color::Muted),
+                    )
+                    .child(Headline::new("Agentic Editing in Zed").size(HeadlineSize::Large)),
+            )
+            .child(h_flex().absolute().top_2().right_2().child(
+                IconButton::new("cancel", IconName::X).on_click(cx.listener(
+                    |_, _: &ClickEvent, _window, cx| {
+                        agent_onboarding_event!("Cancelled", trigger = "X click");
+                        cx.emit(DismissEvent);
+                    },
+                )),
+            ));
+
+        let open_panel_button = Button::new("open-panel", "Get Started with the Agent Panel")
+            .icon_size(IconSize::Indicator)
+            .style(ButtonStyle::Tinted(TintColor::Accent))
+            .full_width()
+            .on_click(cx.listener(Self::open_panel));
+
+        let blog_post_button = Button::new("view-blog", "Check out the Blog Post")
+            .icon(IconName::ArrowUpRight)
+            .icon_size(IconSize::Indicator)
+            .icon_color(Color::Muted)
+            .full_width()
+            .on_click(cx.listener(Self::view_blog));
+
+        let copy = "Zed now natively supports agentic editing, enabling fluid collaboration between humans and AI.";
+
+        base.child(Label::new(copy).color(Color::Muted)).child(
+            v_flex()
+                .w_full()
+                .mt_2()
+                .gap_2()
+                .child(open_panel_button)
+                .child(blog_post_button),
+        )
+    }
+}
--- a/crates/agent/src/ui/preview/agent_preview.rs
+++ b/crates/agent/src/ui/preview/agent_preview.rs
@@ -6,16 +6,11 @@ use std::sync::OnceLock;
 use ui::{AnyElement, Component, ComponentScope, Window};
 use workspace::Workspace;

-use crate::{ActiveThread, ThreadStore};
+use crate::ActiveThread;

 /// Function type for creating agent component previews
-pub type PreviewFn = fn(
-    WeakEntity<Workspace>,
-    Entity<ActiveThread>,
-    WeakEntity<ThreadStore>,
-    &mut Window,
-    &mut App,
-) -> Option<AnyElement>;
+pub type PreviewFn =
+    fn(WeakEntity<Workspace>, Entity<ActiveThread>, &mut Window, &mut App) -> Option<AnyElement>;

 /// Distributed slice for preview registration functions
 #[distributed_slice]
@@ -32,7 +27,6 @@ pub trait AgentPreview: Component + Sized {
    fn agent_preview(
        workspace: WeakEntity<Workspace>,
        active_thread: Entity<ActiveThread>,
-        thread_store: WeakEntity<ThreadStore>,
        window: &mut Window,
        cx: &mut App,
    ) -> Option<AnyElement>;
@@ -75,14 +69,13 @@ pub fn get_agent_preview(
    id: &ComponentId,
    workspace: WeakEntity<Workspace>,
    active_thread: Entity<ActiveThread>,
-    thread_store: WeakEntity<ThreadStore>,
    window: &mut Window,
    cx: &mut App,
 ) -> Option<AnyElement> {
    let registry = get_or_init_registry();
    registry
        .get(id)
-        .and_then(|preview_fn| preview_fn(workspace, active_thread, thread_store, window, cx))
+        .and_then(|preview_fn| preview_fn(workspace, active_thread, window, cx))
 }

 /// Get all registered agent previews.
--- a/crates/agent/src/ui/upsell.rs
+++ b/crates/agent/src/ui/upsell.rs
@@ -15,7 +15,7 @@ use ui::{
 /// ```
 /// let upsell = Upsell::new(
 ///     "Upgrade to Zed Pro",
-///     "Get unlimited access to AI features and more",
+///     "Get access to advanced AI features and more",
 ///     "Upgrade Now",
 ///     Box::new(|_, _window, cx| {
 ///         cx.open_url("https://zed.dev/pricing");
@@ -33,9 +33,9 @@ pub struct Upsell {
    title: SharedString,
    message: SharedString,
    cta_text: SharedString,
-    on_click: Box<dyn Fn(&ClickEvent, &mut Window, &mut App)>,
-    on_dismiss: Box<dyn Fn(&ClickEvent, &mut Window, &mut App)>,
-    on_dont_show_again: Box<dyn Fn(bool, &mut Window, &mut App)>,
+    on_click: Box<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>,
+    on_dismiss: Box<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>,
+    on_dont_show_again: Box<dyn Fn(bool, &mut Window, &mut App) + 'static>,
 }

 impl Upsell {
@@ -44,9 +44,9 @@ impl Upsell {
        title: impl Into<SharedString>,
        message: impl Into<SharedString>,
        cta_text: impl Into<SharedString>,
-        on_click: Box<dyn Fn(&ClickEvent, &mut Window, &mut App)>,
-        on_dismiss: Box<dyn Fn(&ClickEvent, &mut Window, &mut App)>,
-        on_dont_show_again: Box<dyn Fn(bool, &mut Window, &mut App)>,
+        on_click: Box<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>,
+        on_dismiss: Box<dyn Fn(&ClickEvent, &mut Window, &mut App) + 'static>,
+        on_dont_show_again: Box<dyn Fn(bool, &mut Window, &mut App) + 'static>,
    ) -> Self {
        Self {
            title: title.into(),
@@ -105,7 +105,7 @@ impl RenderOnce for Upsell {
                        h_flex()
                            .gap_2()
                            .child(
-                                Button::new("dismiss-button", "Dismiss")
+                                Button::new("dismiss-button", "No Thanks")
                                    .style(ButtonStyle::Subtle)
                                    .on_click(self.on_dismiss),
                            )
--- a/crates/anthropic/src/anthropic.rs
+++ b/crates/anthropic/src/anthropic.rs
@@ -578,6 +578,7 @@ pub enum ToolChoice {
    Auto,
    Any,
    Tool { name: String },
+    None,
 }

 #[derive(Debug, Serialize, Deserialize)]
--- a/crates/assistant/Cargo.toml
+++ b/crates/assistant/Cargo.toml
@@ -1,88 +0,0 @@
-[package]
-name = "assistant"
-version = "0.1.0"
-edition.workspace = true
-publish.workspace = true
-license = "GPL-3.0-or-later"
-
-[lints]
-workspace = true
-
-[lib]
-path = "src/assistant.rs"
-doctest = false
-
-[features]
-test-support = [
-    "editor/test-support",
-    "language/test-support",
-    "project/test-support",
-    "text/test-support",
-]
-
-[dependencies]
-anyhow.workspace = true
-assistant_context_editor.workspace = true
-assistant_settings.workspace = true
-assistant_slash_command.workspace = true
-assistant_slash_commands.workspace = true
-assistant_tool.workspace = true
-async-watch.workspace = true
-client.workspace = true
-collections.workspace = true
-command_palette_hooks.workspace = true
-db.workspace = true
-editor.workspace = true
-feature_flags.workspace = true
-fs.workspace = true
-futures.workspace = true
-gpui.workspace = true
-indexed_docs.workspace = true
-indoc.workspace = true
-language.workspace = true
-language_model.workspace = true
-language_model_selector.workspace = true
-log.workspace = true
-lsp.workspace = true
-menu.workspace = true
-multi_buffer.workspace = true
-parking_lot.workspace = true
-project.workspace = true
-rules_library.workspace = true
-prompt_store.workspace = true
-proto.workspace = true
-rope.workspace = true
-schemars.workspace = true
-search.workspace = true
-serde.workspace = true
-settings.workspace = true
-smol.workspace = true
-streaming_diff.workspace = true
-telemetry.workspace = true
-telemetry_events.workspace = true
-terminal.workspace = true
-terminal_view.workspace = true
-text.workspace = true
-theme.workspace = true
-ui.workspace = true
-util.workspace = true
-workspace.workspace = true
-zed_actions.workspace = true
-workspace-hack.workspace = true
-
-[dev-dependencies]
-ctor.workspace = true
-editor = { workspace = true, features = ["test-support"] }
-env_logger.workspace = true
-language = { workspace = true, features = ["test-support"] }
-language_model = { workspace = true, features = ["test-support"] }
-languages = { workspace = true, features = ["test-support"] }
-log.workspace = true
-pretty_assertions.workspace = true
-project = { workspace = true, features = ["test-support"] }
-rand.workspace = true
-serde_json_lenient.workspace = true
-terminal_view = { workspace = true, features = ["test-support"] }
-text = { workspace = true, features = ["test-support"] }
-tree-sitter-md.workspace = true
-unindent.workspace = true
--- a/crates/assistant/LICENSE-GPL
+++ b/crates/assistant/LICENSE-GPL
@@ -1 +0,0 @@
-../../LICENSE-GPL
--- a/crates/assistant/src/assistant_configuration.rs
+++ b/crates/assistant/src/assistant_configuration.rs
@@ -1,199 +0,0 @@
-use std::sync::Arc;
-
-use collections::HashMap;
-use gpui::{AnyView, App, EventEmitter, FocusHandle, Focusable, Subscription, canvas};
-use language_model::{LanguageModelProvider, LanguageModelProviderId, LanguageModelRegistry};
-use ui::{ElevationIndex, prelude::*};
-use workspace::Item;
-
-pub struct ConfigurationView {
-    focus_handle: FocusHandle,
-    configuration_views: HashMap<LanguageModelProviderId, AnyView>,
-    _registry_subscription: Subscription,
-}
-
-impl ConfigurationView {
-    pub fn new(window: &mut Window, cx: &mut Context<Self>) -> Self {
-        let focus_handle = cx.focus_handle();
-
-        let registry_subscription = cx.subscribe_in(
-            &LanguageModelRegistry::global(cx),
-            window,
-            |this, _, event: &language_model::Event, window, cx| match event {
-                language_model::Event::AddedProvider(provider_id) => {
-                    let provider = LanguageModelRegistry::read_global(cx).provider(provider_id);
-                    if let Some(provider) = provider {
-                        this.add_configuration_view(&provider, window, cx);
-                    }
-                }
-                language_model::Event::RemovedProvider(provider_id) => {
-                    this.remove_configuration_view(provider_id);
-                }
-                _ => {}
-            },
-        );
-
-        let mut this = Self {
-            focus_handle,
-            configuration_views: HashMap::default(),
-            _registry_subscription: registry_subscription,
-        };
-        this.build_configuration_views(window, cx);
-        this
-    }
-
-    fn build_configuration_views(&mut self, window: &mut Window, cx: &mut Context<Self>) {
-        let providers = LanguageModelRegistry::read_global(cx).providers();
-        for provider in providers {
-            self.add_configuration_view(&provider, window, cx);
-        }
-    }
-
-    fn remove_configuration_view(&mut self, provider_id: &LanguageModelProviderId) {
-        self.configuration_views.remove(provider_id);
-    }
-
-    fn add_configuration_view(
-        &mut self,
-        provider: &Arc<dyn LanguageModelProvider>,
-        window: &mut Window,
-        cx: &mut Context<Self>,
-    ) {
-        let configuration_view = provider.configuration_view(window, cx);
-        self.configuration_views
-            .insert(provider.id(), configuration_view);
-    }
-
-    fn render_provider_view(
-        &mut self,
-        provider: &Arc<dyn LanguageModelProvider>,
-        cx: &mut Context<Self>,
-    ) -> Div {
-        let provider_id = provider.id().0.clone();
-        let provider_name = provider.name().0.clone();
-        let configuration_view = self.configuration_views.get(&provider.id()).cloned();
-
-        let open_new_context = cx.listener({
-            let provider = provider.clone();
-            move |_, _, _window, cx| {
-                cx.emit(ConfigurationViewEvent::NewProviderContextEditor(
-                    provider.clone(),
-                ))
-            }
-        });
-
-        v_flex()
-            .gap_2()
-            .child(
-                h_flex()
-                    .justify_between()
-                    .child(Headline::new(provider_name.clone()).size(HeadlineSize::Small))
-                    .when(provider.is_authenticated(cx), move |this| {
-                        this.child(
-                            h_flex().justify_end().child(
-                                Button::new(
-                                    SharedString::from(format!("new-context-{provider_id}")),
-                                    "Open New Chat",
-                                )
-                                .icon_position(IconPosition::Start)
-                                .icon(IconName::Plus)
-                                .style(ButtonStyle::Filled)
-                                .layer(ElevationIndex::ModalSurface)
-                                .on_click(open_new_context),
-                            ),
-                        )
-                    }),
-            )
-            .child(
-                div()
-                    .p(DynamicSpacing::Base08.rems(cx))
-                    .bg(cx.theme().colors().surface_background)
-                    .border_1()
-                    .border_color(cx.theme().colors().border_variant)
-                    .rounded_sm()
-                    .when(configuration_view.is_none(), |this| {
-                        this.child(div().child(Label::new(format!(
-                            "No configuration view for {}",
-                            provider_name
-                        ))))
-                    })
-                    .when_some(configuration_view, |this, configuration_view| {
-                        this.child(configuration_view)
-                    }),
-            )
-    }
-}
-
-impl Render for ConfigurationView {
-    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        let providers = LanguageModelRegistry::read_global(cx).providers();
-        let provider_views = providers
-            .into_iter()
-            .map(|provider| self.render_provider_view(&provider, cx))
-            .collect::<Vec<_>>();
-
-        let mut element = v_flex()
-            .id("assistant-configuration-view")
-            .track_focus(&self.focus_handle(cx))
-            .bg(cx.theme().colors().editor_background)
-            .size_full()
-            .overflow_y_scroll()
-            .child(
-                v_flex()
-                    .p(DynamicSpacing::Base16.rems(cx))
-                    .border_b_1()
-                    .border_color(cx.theme().colors().border)
-                    .gap_1()
-                    .child(Headline::new("Configure your Assistant").size(HeadlineSize::Medium))
-                    .child(
-                        Label::new(
-                            "At least one LLM provider must be configured to use the Assistant.",
-                        )
-                        .color(Color::Muted),
-                    ),
-            )
-            .child(
-                v_flex()
-                    .p(DynamicSpacing::Base16.rems(cx))
-                    .mt_1()
-                    .gap_6()
-                    .flex_1()
-                    .children(provider_views),
-            )
-            .into_any();
-
-        // We use a canvas here to get scrolling to work in the ConfigurationView. It's a workaround
-        // because we couldn't the element to take up the size of the parent.
-        canvas(
-            move |bounds, window, cx| {
-                element.prepaint_as_root(bounds.origin, bounds.size.into(), window, cx);
-                element
-            },
-            |_, mut element, window, cx| {
-                element.paint(window, cx);
-            },
-        )
-        .flex_1()
-        .w_full()
-    }
-}
-
-pub enum ConfigurationViewEvent {
-    NewProviderContextEditor(Arc<dyn LanguageModelProvider>),
-}
-
-impl EventEmitter<ConfigurationViewEvent> for ConfigurationView {}
-
-impl Focusable for ConfigurationView {
-    fn focus_handle(&self, _: &App) -> FocusHandle {
-        self.focus_handle.clone()
-    }
-}
-
-impl Item for ConfigurationView {
-    type Event = ConfigurationViewEvent;
-
-    fn tab_content_text(&self, _detail: usize, _cx: &App) -> SharedString {
-        "Configuration".into()
-    }
-}
--- a/crates/assistant/src/assistant_panel.rs
+++ b/crates/assistant/src/assistant_panel.rs
--- a/crates/assistant/src/inline_assistant.rs
+++ b/crates/assistant/src/inline_assistant.rs
--- a/crates/assistant/src/terminal_inline_assistant.rs
+++ b/crates/assistant/src/terminal_inline_assistant.rs
--- a/crates/assistant_context_editor/Cargo.toml
+++ b/crates/assistant_context_editor/Cargo.toml
@@ -22,7 +22,6 @@ clock.workspace = true
 collections.workspace = true
 context_server.workspace = true
 editor.workspace = true
-feature_flags.workspace = true
 fs.workspace = true
 futures.workspace = true
 fuzzy.workspace = true
--- a/crates/assistant_context_editor/src/context.rs
+++ b/crates/assistant_context_editor/src/context.rs
@@ -3,6 +3,7 @@ mod context_tests;

 use crate::patch::{AssistantEdit, AssistantPatch, AssistantPatchStatus};
 use anyhow::{Context as _, Result, anyhow};
+use assistant_settings::AssistantSettings;
 use assistant_slash_command::{
    SlashCommandContent, SlashCommandEvent, SlashCommandLine, SlashCommandOutputSection,
    SlashCommandResult, SlashCommandWorkingSet,
@@ -32,7 +33,7 @@ use serde::{Deserialize, Serialize};
 use smallvec::SmallVec;
 use std::{
    cmp::{Ordering, max},
-    fmt::Debug,
+    fmt::{Debug, Write as _},
    iter, mem,
    ops::Range,
    path::Path,
@@ -1273,10 +1274,10 @@ impl AssistantContext {
    pub(crate) fn count_remaining_tokens(&mut self, cx: &mut Context<Self>) {
        // Assume it will be a Chat request, even though that takes fewer tokens (and risks going over the limit),
        // because otherwise you see in the UI that your empty message has a bunch of tokens already used.
-        let request = self.to_completion_request(RequestType::Chat, cx);
        let Some(model) = LanguageModelRegistry::read_global(cx).default_model() else {
            return;
        };
+        let request = self.to_completion_request(Some(&model.model), RequestType::Chat, cx);
        let debounce = self.token_count.is_some();
        self.pending_token_count = cx.spawn(async move |this, cx| {
            async move {
@@ -1422,7 +1423,7 @@ impl AssistantContext {
        }

        let request = {
-            let mut req = self.to_completion_request(RequestType::Chat, cx);
+            let mut req = self.to_completion_request(Some(&model), RequestType::Chat, cx);
            // Skip the last message because it's likely to change and
            // therefore would be a waste to cache.
            req.messages.pop();
@@ -2321,7 +2322,7 @@ impl AssistantContext {
        // Compute which messages to cache, including the last one.
        self.mark_cache_anchors(&model.cache_configuration(), false, cx);

-        let request = self.to_completion_request(request_type, cx);
+        let request = self.to_completion_request(Some(&model), request_type, cx);

        let assistant_message = self
            .insert_message_after(last_message_id, Role::Assistant, MessageStatus::Pending, cx)
@@ -2539,8 +2540,29 @@ impl AssistantContext {
        Some(user_message)
    }

+    pub fn to_xml(&self, cx: &App) -> String {
+        let mut output = String::new();
+        let buffer = self.buffer.read(cx);
+        for message in self.messages(cx) {
+            if message.status != MessageStatus::Done {
+                continue;
+            }
+
+            writeln!(&mut output, "<{}>", message.role).unwrap();
+            for chunk in buffer.text_for_range(message.offset_range) {
+                output.push_str(chunk);
+            }
+            if !output.ends_with('\n') {
+                output.push('\n');
+            }
+            writeln!(&mut output, "</{}>", message.role).unwrap();
+        }
+        output
+    }
+
    pub fn to_completion_request(
        &self,
+        model: Option<&Arc<dyn LanguageModel>>,
        request_type: RequestType,
        cx: &App,
    ) -> LanguageModelRequest {
@@ -2563,8 +2585,10 @@ impl AssistantContext {
            mode: None,
            messages: Vec::new(),
            tools: Vec::new(),
+            tool_choice: None,
            stop: Vec::new(),
-            temperature: None,
+            temperature: model
+                .and_then(|model| AssistantSettings::temperature_for_model(model, cx)),
        };
        for message in self.messages(cx) {
            if message.status != MessageStatus::Done {
@@ -2961,7 +2985,7 @@ impl AssistantContext {
                return;
            }

-            let mut request = self.to_completion_request(RequestType::Chat, cx);
+            let mut request = self.to_completion_request(Some(&model.model), RequestType::Chat, cx);
            request.messages.push(LanguageModelRequestMessage {
                role: Role::User,
                content: vec![
--- a/crates/assistant_context_editor/src/context/context_tests.rs
+++ b/crates/assistant_context_editor/src/context/context_tests.rs
@@ -43,9 +43,8 @@ use workspace::Workspace;

 #[gpui::test]
 fn test_inserting_and_removing_messages(cx: &mut App) {
-    let settings_store = SettingsStore::test(cx);
-    LanguageModelRegistry::test(cx);
-    cx.set_global(settings_store);
+    init_test(cx);
+
    let registry = Arc::new(LanguageRegistry::test(cx.background_executor().clone()));
    let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
    let context = cx.new(|cx| {
@@ -182,9 +181,8 @@ fn test_inserting_and_removing_messages(cx: &mut App) {

 #[gpui::test]
 fn test_message_splitting(cx: &mut App) {
-    let settings_store = SettingsStore::test(cx);
-    cx.set_global(settings_store);
-    LanguageModelRegistry::test(cx);
+    init_test(cx);
+
    let registry = Arc::new(LanguageRegistry::test(cx.background_executor().clone()));

    let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
@@ -285,9 +283,8 @@ fn test_message_splitting(cx: &mut App) {

 #[gpui::test]
 fn test_messages_for_offsets(cx: &mut App) {
-    let settings_store = SettingsStore::test(cx);
-    LanguageModelRegistry::test(cx);
-    cx.set_global(settings_store);
+    init_test(cx);
+
    let registry = Arc::new(LanguageRegistry::test(cx.background_executor().clone()));
    let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
    let context = cx.new(|cx| {
@@ -378,10 +375,8 @@ fn test_messages_for_offsets(cx: &mut App) {

 #[gpui::test]
 async fn test_slash_commands(cx: &mut TestAppContext) {
-    let settings_store = cx.update(SettingsStore::test);
-    cx.set_global(settings_store);
-    cx.update(LanguageModelRegistry::test);
-    cx.update(Project::init_settings);
+    cx.update(init_test);
+
    let fs = FakeFs::new(cx.background_executor.clone());

    fs.insert_tree(
@@ -671,22 +666,19 @@ async fn test_slash_commands(cx: &mut TestAppContext) {

 #[gpui::test]
 async fn test_workflow_step_parsing(cx: &mut TestAppContext) {
-    cx.update(prompt_store::init);
-    let mut settings_store = cx.update(SettingsStore::test);
    cx.update(|cx| {
-        settings_store
-            .set_user_settings(
-                r#"{ "assistant": { "enable_experimental_live_diffs": true } }"#,
-                cx,
-            )
-            .unwrap()
+        init_test(cx);
+        cx.update_global(|settings_store: &mut SettingsStore, cx| {
+            settings_store
+                .set_user_settings(
+                    r#"{ "assistant": { "enable_experimental_live_diffs": true } }"#,
+                    cx,
+                )
+                .unwrap()
+        })
    });
-    cx.set_global(settings_store);
-    cx.update(language::init);
-    cx.update(Project::init_settings);
    let fs = FakeFs::new(cx.executor());
    let project = Project::test(fs, [Path::new("/root")], cx).await;
-    cx.update(LanguageModelRegistry::test);

    let registry = Arc::new(LanguageRegistry::test(cx.executor()));

@@ -1069,9 +1061,8 @@ async fn test_workflow_step_parsing(cx: &mut TestAppContext) {

 #[gpui::test]
 async fn test_serialization(cx: &mut TestAppContext) {
-    let settings_store = cx.update(SettingsStore::test);
-    cx.set_global(settings_store);
-    cx.update(LanguageModelRegistry::test);
+    cx.update(init_test);
+
    let registry = Arc::new(LanguageRegistry::test(cx.executor()));
    let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
    let context = cx.new(|cx| {
@@ -1147,6 +1138,8 @@ async fn test_serialization(cx: &mut TestAppContext) {

 #[gpui::test(iterations = 100)]
 async fn test_random_context_collaboration(cx: &mut TestAppContext, mut rng: StdRng) {
+    cx.update(init_test);
+
    let min_peers = env::var("MIN_PEERS")
        .map(|i| i.parse().expect("invalid `MIN_PEERS` variable"))
        .unwrap_or(2);
@@ -1157,10 +1150,6 @@ async fn test_random_context_collaboration(cx: &mut TestAppContext, mut rng: Std
        .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
        .unwrap_or(50);

-    let settings_store = cx.update(SettingsStore::test);
-    cx.set_global(settings_store);
-    cx.update(LanguageModelRegistry::test);
-
    let slash_commands = cx.update(SlashCommandRegistry::default_global);
    slash_commands.register_command(FakeSlashCommand("cmd-1".into()), false);
    slash_commands.register_command(FakeSlashCommand("cmd-2".into()), false);
@@ -1429,9 +1418,8 @@ async fn test_random_context_collaboration(cx: &mut TestAppContext, mut rng: Std

 #[gpui::test]
 fn test_mark_cache_anchors(cx: &mut App) {
-    let settings_store = SettingsStore::test(cx);
-    LanguageModelRegistry::test(cx);
-    cx.set_global(settings_store);
+    init_test(cx);
+
    let registry = Arc::new(LanguageRegistry::test(cx.background_executor().clone()));
    let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
    let context = cx.new(|cx| {
@@ -1606,6 +1594,16 @@ fn messages_cache(
        .collect()
 }

+fn init_test(cx: &mut App) {
+    let settings_store = SettingsStore::test(cx);
+    prompt_store::init(cx);
+    LanguageModelRegistry::test(cx);
+    cx.set_global(settings_store);
+    language::init(cx);
+    assistant_settings::init(cx);
+    Project::init_settings(cx);
+}
+
 #[derive(Clone)]
 struct FakeSlashCommand(String);

--- a/crates/assistant_context_editor/src/context_editor.rs
+++ b/crates/assistant_context_editor/src/context_editor.rs
@@ -18,7 +18,6 @@ use editor::{
    scroll::Autoscroll,
 };
 use editor::{FoldPlaceholder, display_map::CreaseId};
-use feature_flags::{Assistant2FeatureFlag, FeatureFlagAppExt as _};
 use fs::Fs;
 use futures::FutureExt;
 use gpui::{
@@ -43,8 +42,8 @@ use language_model_selector::{
 };
 use multi_buffer::MultiBufferRow;
 use picker::Picker;
-use project::lsp_store::LocalLspAdapterDelegate;
 use project::{Project, Worktree};
+use project::{ProjectPath, lsp_store::LocalLspAdapterDelegate};
 use rope::Point;
 use serde::{Deserialize, Serialize};
 use settings::{Settings, SettingsStore, update_settings_file};
@@ -100,7 +99,7 @@ actions!(

 #[derive(PartialEq, Clone)]
 pub enum InsertDraggedFiles {
-    ProjectPaths(Vec<PathBuf>),
+    ProjectPaths(Vec<ProjectPath>),
    ExternalFiles(Vec<PathBuf>),
 }

@@ -138,7 +137,7 @@ pub enum ThoughtProcessStatus {
    Completed,
 }

-pub trait AssistantPanelDelegate {
+pub trait AgentPanelDelegate {
    fn active_context_editor(
        &self,
        workspace: &mut Workspace,
@@ -172,7 +171,7 @@ pub trait AssistantPanelDelegate {
    );
 }

-impl dyn AssistantPanelDelegate {
+impl dyn AgentPanelDelegate {
    /// Returns the global [`AssistantPanelDelegate`], if it exists.
    pub fn try_global(cx: &App) -> Option<Arc<Self>> {
        cx.try_global::<GlobalAssistantPanelDelegate>()
@@ -185,7 +184,7 @@ impl dyn AssistantPanelDelegate {
    }
 }

-struct GlobalAssistantPanelDelegate(Arc<dyn AssistantPanelDelegate>);
+struct GlobalAssistantPanelDelegate(Arc<dyn AgentPanelDelegate>);

 impl Global for GlobalAssistantPanelDelegate {}

@@ -243,9 +242,9 @@ impl ContextEditor {
        let editor = cx.new(|cx| {
            let mut editor =
                Editor::for_buffer(context.read(cx).buffer().clone(), None, window, cx);
+            editor.disable_scrollbars_and_minimap(cx);
            editor.set_soft_wrap_mode(SoftWrap::EditorWidth, cx);
            editor.set_show_line_numbers(false, cx);
-            editor.set_show_scrollbars(false, cx);
            editor.set_show_git_diff_gutter(false, cx);
            editor.set_show_code_actions(false, cx);
            editor.set_show_runnables(false, cx);
@@ -258,7 +257,7 @@ impl ContextEditor {

            let show_edit_predictions = all_language_settings(None, cx)
                .edit_predictions
-                .enabled_in_assistant;
+                .enabled_in_text_threads;

            editor.set_show_edit_predictions(Some(show_edit_predictions), window, cx);

@@ -333,7 +332,7 @@ impl ContextEditor {
        self.editor.update(cx, |editor, cx| {
            let show_edit_predictions = all_language_settings(None, cx)
                .edit_predictions
-                .enabled_in_assistant;
+                .enabled_in_text_threads;

            editor.set_show_edit_predictions(Some(show_edit_predictions), window, cx);
        });
@@ -368,10 +367,16 @@ impl ContextEditor {
    }

    fn assist(&mut self, _: &Assist, window: &mut Window, cx: &mut Context<Self>) {
+        if self.sending_disabled(cx) {
+            return;
+        }
        self.send_to_model(RequestType::Chat, window, cx);
    }

    fn edit(&mut self, _: &Edit, window: &mut Window, cx: &mut Context<Self>) {
+        if self.sending_disabled(cx) {
+            return;
+        }
        self.send_to_model(RequestType::SuggestEdits, window, cx);
    }

@@ -943,7 +948,7 @@ impl ContextEditor {
                    let patch_range = range.clone();
                    move |cx: &mut BlockContext| {
                        let max_width = cx.max_width;
-                        let gutter_width = cx.gutter_dimensions.full_width();
+                        let gutter_width = cx.margins.gutter.full_width();
                        let block_id = cx.block_id;
                        let selected = cx.selected;
                        let window = &mut cx.window;
@@ -1406,7 +1411,7 @@ impl ContextEditor {
                                None,
                            ),
                            Role::Assistant => {
-                                let base_label = Label::new("Assistant").color(Color::Info);
+                                let base_label = Label::new("Agent").color(Color::Info);
                                let mut spinner = None;
                                let mut note = None;
                                let animated_label = if llm_loading {
@@ -1468,7 +1473,7 @@ impl ContextEditor {
                                        Tooltip::with_meta(
                                            "Toggle message role",
                                            None,
-                                            "Available roles: You (User), Assistant, System",
+                                            "Available roles: You (User), Agent, System",
                                            window,
                                            cx,
                                        )
@@ -1489,7 +1494,7 @@ impl ContextEditor {

                        h_flex()
                            .id(("message_header", message_id.as_u64()))
-                            .pl(cx.gutter_dimensions.full_width())
+                            .pl(cx.margins.gutter.full_width())
                            .h_11()
                            .w_full()
                            .relative()
@@ -1584,6 +1589,7 @@ impl ContextEditor {
                ),
                priority: usize::MAX,
                render: render_block(MessageMetadata::from(message)),
+                render_in_minimap: false,
            };
            let mut new_blocks = vec![];
            let mut block_index_to_message = vec![];
@@ -1666,11 +1672,11 @@ impl ContextEditor {
        window: &mut Window,
        cx: &mut Context<Workspace>,
    ) {
-        let Some(assistant_panel_delegate) = <dyn AssistantPanelDelegate>::try_global(cx) else {
+        let Some(agent_panel_delegate) = <dyn AgentPanelDelegate>::try_global(cx) else {
            return;
        };
        let Some(context_editor_view) =
-            assistant_panel_delegate.active_context_editor(workspace, window, cx)
+            agent_panel_delegate.active_context_editor(workspace, window, cx)
        else {
            return;
        };
@@ -1696,9 +1702,9 @@ impl ContextEditor {
        cx: &mut Context<Workspace>,
    ) {
        let result = maybe!({
-            let assistant_panel_delegate = <dyn AssistantPanelDelegate>::try_global(cx)?;
+            let agent_panel_delegate = <dyn AgentPanelDelegate>::try_global(cx)?;
            let context_editor_view =
-                assistant_panel_delegate.active_context_editor(workspace, window, cx)?;
+                agent_panel_delegate.active_context_editor(workspace, window, cx)?;
            Self::get_selection_or_code_block(&context_editor_view, cx)
        });
        let Some((text, is_code_block)) = result else {
@@ -1725,22 +1731,22 @@ impl ContextEditor {
        );
    }

-    pub fn insert_dragged_files(
+    pub fn handle_insert_dragged_files(
        workspace: &mut Workspace,
        action: &InsertDraggedFiles,
        window: &mut Window,
        cx: &mut Context<Workspace>,
    ) {
-        let Some(assistant_panel_delegate) = <dyn AssistantPanelDelegate>::try_global(cx) else {
+        let Some(agent_panel_delegate) = <dyn AgentPanelDelegate>::try_global(cx) else {
            return;
        };
        let Some(context_editor_view) =
-            assistant_panel_delegate.active_context_editor(workspace, window, cx)
+            agent_panel_delegate.active_context_editor(workspace, window, cx)
        else {
            return;
        };

-        let project = workspace.project().clone();
+        let project = context_editor_view.read(cx).project.clone();

        let paths = match action {
            InsertDraggedFiles::ProjectPaths(paths) => Task::ready((paths.clone(), vec![])),
@@ -1751,22 +1757,17 @@ impl ContextEditor {
                    .map(|path| Workspace::project_path_for_path(project.clone(), &path, false, cx))
                    .collect::<Vec<_>>();

-                cx.spawn(async move |_, cx| {
+                cx.background_spawn(async move {
                    let mut paths = vec![];
                    let mut worktrees = vec![];

                    let opened_paths = futures::future::join_all(tasks).await;
-                    for (worktree, project_path) in opened_paths.into_iter().flatten() {
-                        let Ok(worktree_root_name) =
-                            worktree.read_with(cx, |worktree, _| worktree.root_name().to_string())
-                        else {
-                            continue;
-                        };

-                        let mut full_path = PathBuf::from(worktree_root_name.clone());
-                        full_path.push(&project_path.path);
-                        paths.push(full_path);
-                        worktrees.push(worktree);
+                    for entry in opened_paths {
+                        if let Some((worktree, project_path)) = entry.log_err() {
+                            worktrees.push(worktree);
+                            paths.push(project_path);
+                        }
                    }

                    (paths, worktrees)
@@ -1774,33 +1775,50 @@ impl ContextEditor {
            }
        };

-        window
-            .spawn(cx, async move |cx| {
+        context_editor_view.update(cx, |_, cx| {
+            cx.spawn_in(window, async move |this, cx| {
                let (paths, dragged_file_worktrees) = paths.await;
-                let cmd_name = FileSlashCommand.name();
-
-                context_editor_view
-                    .update_in(cx, |context_editor, window, cx| {
-                        let file_argument = paths
-                            .into_iter()
-                            .map(|path| path.to_string_lossy().to_string())
-                            .collect::<Vec<_>>()
-                            .join(" ");
-
-                        context_editor.editor.update(cx, |editor, cx| {
-                            editor.insert("\n", window, cx);
-                            editor.insert(&format!("/{} {}", cmd_name, file_argument), window, cx);
-                        });
-
-                        context_editor.confirm_command(&ConfirmCommand, window, cx);
-
-                        context_editor
-                            .dragged_file_worktrees
-                            .extend(dragged_file_worktrees);
-                    })
-                    .log_err();
+                this.update_in(cx, |this, window, cx| {
+                    this.insert_dragged_files(paths, dragged_file_worktrees, window, cx);
+                })
+                .ok();
            })
            .detach();
+        })
+    }
+
+    pub fn insert_dragged_files(
+        &mut self,
+        opened_paths: Vec<ProjectPath>,
+        added_worktrees: Vec<Entity<Worktree>>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let mut file_slash_command_args = vec![];
+        for project_path in opened_paths.into_iter() {
+            let Some(worktree) = self
+                .project
+                .read(cx)
+                .worktree_for_id(project_path.worktree_id, cx)
+            else {
+                continue;
+            };
+            let worktree_root_name = worktree.read(cx).root_name().to_string();
+            let mut full_path = PathBuf::from(worktree_root_name.clone());
+            full_path.push(&project_path.path);
+            file_slash_command_args.push(full_path.to_string_lossy().to_string());
+        }
+
+        let cmd_name = FileSlashCommand.name();
+
+        let file_argument = file_slash_command_args.join(" ");
+
+        self.editor.update(cx, |editor, cx| {
+            editor.insert("\n", window, cx);
+            editor.insert(&format!("/{} {}", cmd_name, file_argument), window, cx);
+        });
+        self.confirm_command(&ConfirmCommand, window, cx);
+        self.dragged_file_worktrees.extend(added_worktrees);
    }

    pub fn quote_selection(
@@ -1809,7 +1827,7 @@ impl ContextEditor {
        window: &mut Window,
        cx: &mut Context<Workspace>,
    ) {
-        let Some(assistant_panel_delegate) = <dyn AssistantPanelDelegate>::try_global(cx) else {
+        let Some(agent_panel_delegate) = <dyn AgentPanelDelegate>::try_global(cx) else {
            return;
        };

@@ -1840,7 +1858,7 @@ impl ContextEditor {
            return;
        }

-        assistant_panel_delegate.quote_selection(workspace, selections, buffer, window, cx);
+        agent_panel_delegate.quote_selection(workspace, selections, buffer, window, cx);
    }

    pub fn quote_ranges(
@@ -2146,12 +2164,12 @@ impl ContextEditor {
                            let image_size = size_for_image(
                                &image,
                                size(
-                                    cx.max_width - cx.gutter_dimensions.full_width(),
+                                    cx.max_width - cx.margins.gutter.full_width(),
                                    MAX_HEIGHT_IN_LINES as f32 * cx.line_height,
                                ),
                            );
                            h_flex()
-                                .pl(cx.gutter_dimensions.full_width())
+                                .pl(cx.margins.gutter.full_width())
                                .child(
                                    img(image.clone())
                                        .object_fit(gpui::ObjectFit::ScaleDown)
@@ -2161,6 +2179,7 @@ impl ContextEditor {
                                .into_any_element()
                        }),
                        priority: 0,
+                        render_in_minimap: false,
                    })
                })
                .collect::<Vec<_>>();
@@ -2383,19 +2402,11 @@ impl ContextEditor {
                            .on_click({
                                let focus_handle = self.focus_handle(cx).clone();
                                move |_event, window, cx| {
-                                    if cx.has_flag::<Assistant2FeatureFlag>() {
-                                        focus_handle.dispatch_action(
-                                            &zed_actions::agent::OpenConfiguration,
-                                            window,
-                                            cx,
-                                        );
-                                    } else {
-                                        focus_handle.dispatch_action(
-                                            &zed_actions::assistant::ShowConfiguration,
-                                            window,
-                                            cx,
-                                        );
-                                    };
+                                    focus_handle.dispatch_action(
+                                        &zed_actions::agent::OpenConfiguration,
+                                        window,
+                                        cx,
+                                    );
                                }
                            }),
                    )
@@ -2433,17 +2444,8 @@ impl ContextEditor {
            None => (ButtonStyle::Filled, None),
        };

-        let model = LanguageModelRegistry::read_global(cx).default_model();
-
-        let has_configuration_error = configuration_error(cx).is_some();
-        let needs_to_accept_terms = self.show_accept_terms
-            && model
-                .as_ref()
-                .map_or(false, |model| model.provider.must_accept_terms(cx));
-        let disabled = has_configuration_error || needs_to_accept_terms;
-
        ButtonLike::new("send_button")
-            .disabled(disabled)
+            .disabled(self.sending_disabled(cx))
            .style(style)
            .when_some(tooltip, |button, tooltip| {
                button.tooltip(move |_, _| tooltip.clone())
@@ -2465,6 +2467,20 @@ impl ContextEditor {
            })
    }

+    /// Whether or not we should allow messages to be sent.
+    /// Will return false if the selected provided has a configuration error or
+    /// if the user has not accepted the terms of service for this provider.
+    fn sending_disabled(&self, cx: &mut Context<'_, ContextEditor>) -> bool {
+        let model = LanguageModelRegistry::read_global(cx).default_model();
+
+        let has_configuration_error = configuration_error(cx).is_some();
+        let needs_to_accept_terms = self.show_accept_terms
+            && model
+                .as_ref()
+                .map_or(false, |model| model.provider.must_accept_terms(cx));
+        has_configuration_error || needs_to_accept_terms
+    }
+
    fn render_edit_button(&self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
        let focus_handle = self.focus_handle(cx).clone();

@@ -2492,19 +2508,8 @@ impl ContextEditor {
            None => (ButtonStyle::Filled, None),
        };

-        let provider = LanguageModelRegistry::read_global(cx)
-            .default_model()
-            .map(|default| default.provider);
-
-        let has_configuration_error = configuration_error(cx).is_some();
-        let needs_to_accept_terms = self.show_accept_terms
-            && provider
-                .as_ref()
-                .map_or(false, |provider| provider.must_accept_terms(cx));
-        let disabled = has_configuration_error || needs_to_accept_terms;
-
        ButtonLike::new("edit_button")
-            .disabled(disabled)
+            .disabled(self.sending_disabled(cx))
            .style(style)
            .when_some(tooltip, |button, tooltip| {
                button.tooltip(move |_, _| tooltip.clone())
@@ -3356,10 +3361,10 @@ impl FollowableItem for ContextEditor {
        let editor_state = state.editor?;

        let project = workspace.read(cx).project().clone();
-        let assistant_panel_delegate = <dyn AssistantPanelDelegate>::try_global(cx)?;
+        let agent_panel_delegate = <dyn AgentPanelDelegate>::try_global(cx)?;

        let context_editor_task = workspace.update(cx, |workspace, cx| {
-            assistant_panel_delegate.open_remote_context(workspace, context_id, window, cx)
+            agent_panel_delegate.open_remote_context(workspace, context_id, window, cx)
        });

        Some(window.spawn(cx, async move |cx| {
--- a/crates/assistant_context_editor/src/context_history.rs
+++ b/crates/assistant_context_editor/src/context_history.rs
@@ -8,7 +8,7 @@ use ui::{Avatar, ListItem, ListItemSpacing, prelude::*};
 use workspace::{Item, Workspace};

 use crate::{
-    AssistantPanelDelegate, ContextStore, DEFAULT_TAB_TITLE, RemoteContextMetadata,
+    AgentPanelDelegate, ContextStore, DEFAULT_TAB_TITLE, RemoteContextMetadata,
    SavedContextMetadata,
 };

@@ -70,19 +70,19 @@ impl ContextHistory {
    ) {
        let SavedContextPickerEvent::Confirmed(context) = event;

-        let Some(assistant_panel_delegate) = <dyn AssistantPanelDelegate>::try_global(cx) else {
+        let Some(agent_panel_delegate) = <dyn AgentPanelDelegate>::try_global(cx) else {
            return;
        };

        self.workspace
            .update(cx, |workspace, cx| match context {
                ContextMetadata::Remote(metadata) => {
-                    assistant_panel_delegate
+                    agent_panel_delegate
                        .open_remote_context(workspace, metadata.id.clone(), window, cx)
                        .detach_and_log_err(cx);
                }
                ContextMetadata::Saved(metadata) => {
-                    assistant_panel_delegate
+                    agent_panel_delegate
                        .open_saved_context(workspace, metadata.path.clone(), window, cx)
                        .detach_and_log_err(cx);
                }
--- a/crates/assistant_context_editor/src/context_store.rs
+++ b/crates/assistant_context_editor/src/context_store.rs
@@ -339,7 +339,11 @@ impl ContextStore {
        }
    }

-    pub fn contexts(&self) -> Vec<SavedContextMetadata> {
+    pub fn unordered_contexts(&self) -> impl Iterator<Item = &SavedContextMetadata> {
+        self.contexts_metadata.iter()
+    }
+
+    pub fn reverse_chronological_contexts(&self) -> Vec<SavedContextMetadata> {
        let mut contexts = self.contexts_metadata.iter().cloned().collect::<Vec<_>>();
        contexts.sort_unstable_by_key(|thread| std::cmp::Reverse(thread.mtime));
        contexts
--- a/crates/assistant_settings/Cargo.toml
+++ b/crates/assistant_settings/Cargo.toml
@@ -14,7 +14,7 @@ path = "src/assistant_settings.rs"
 [dependencies]
 anthropic = { workspace = true, features = ["schemars"] }
 anyhow.workspace = true
-feature_flags.workspace = true
+collections.workspace = true
 gpui.workspace = true
 indexmap.workspace = true
 language_model.workspace = true
@@ -27,10 +27,12 @@ schemars.workspace = true
 serde.workspace = true
 settings.workspace = true
 workspace-hack.workspace = true
+zed_llm_client.workspace = true

 [dev-dependencies]
 fs.workspace = true
 gpui = { workspace = true, features = ["test-support"] }
 paths.workspace = true
 serde_json_lenient.workspace = true
+serde_json.workspace = true
 settings = { workspace = true, features = ["test-support"] }
--- a/crates/assistant_settings/src/agent_profile.rs
+++ b/crates/assistant_settings/src/agent_profile.rs
@@ -1,7 +1,7 @@
 use std::sync::Arc;

+use collections::IndexMap;
 use gpui::SharedString;
-use indexmap::IndexMap;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};

--- a/crates/assistant_settings/src/assistant_settings.rs
+++ b/crates/assistant_settings/src/assistant_settings.rs
@@ -5,10 +5,9 @@ use std::sync::Arc;
 use ::open_ai::Model as OpenAiModel;
 use anthropic::Model as AnthropicModel;
 use anyhow::{Result, bail};
+use collections::IndexMap;
 use deepseek::Model as DeepseekModel;
-use feature_flags::{AgentStreamEditsFeatureFlag, Assistant2FeatureFlag, FeatureFlagAppExt};
-use gpui::{App, Pixels};
-use indexmap::IndexMap;
+use gpui::{App, Pixels, SharedString};
 use language_model::{CloudModel, LanguageModel};
 use lmstudio::Model as LmStudioModel;
 use ollama::Model as OllamaModel;
@@ -18,6 +17,10 @@ use settings::{Settings, SettingsSources};

 pub use crate::agent_profile::*;

+pub fn init(cx: &mut App) {
+    AssistantSettings::register(cx);
+}
+
 #[derive(Copy, Clone, Default, Debug, Serialize, Deserialize, JsonSchema)]
 #[serde(rename_all = "snake_case")]
 pub enum AssistantDockPosition {
@@ -89,31 +92,66 @@ pub struct AssistantSettings {
    pub notify_when_agent_waiting: NotifyWhenAgentWaiting,
    pub stream_edits: bool,
    pub single_file_review: bool,
+    pub model_parameters: Vec<LanguageModelParameters>,
+    pub preferred_completion_mode: CompletionMode,
 }

 impl AssistantSettings {
-    pub fn stream_edits(&self, cx: &App) -> bool {
-        cx.has_flag::<AgentStreamEditsFeatureFlag>() || self.stream_edits
+    pub fn temperature_for_model(model: &Arc<dyn LanguageModel>, cx: &App) -> Option<f32> {
+        let settings = Self::get_global(cx);
+        settings
+            .model_parameters
+            .iter()
+            .rfind(|setting| setting.matches(model))
+            .and_then(|m| m.temperature)
    }

-    pub fn are_live_diffs_enabled(&self, cx: &App) -> bool {
-        if cx.has_flag::<Assistant2FeatureFlag>() {
-            return false;
-        }
-
-        cx.is_staff() || self.enable_experimental_live_diffs
+    pub fn are_live_diffs_enabled(&self, _cx: &App) -> bool {
+        false
    }

    pub fn set_inline_assistant_model(&mut self, provider: String, model: String) {
-        self.inline_assistant_model = Some(LanguageModelSelection { provider, model });
+        self.inline_assistant_model = Some(LanguageModelSelection {
+            provider: provider.into(),
+            model,
+        });
    }

    pub fn set_commit_message_model(&mut self, provider: String, model: String) {
-        self.commit_message_model = Some(LanguageModelSelection { provider, model });
+        self.commit_message_model = Some(LanguageModelSelection {
+            provider: provider.into(),
+            model,
+        });
    }

    pub fn set_thread_summary_model(&mut self, provider: String, model: String) {
-        self.thread_summary_model = Some(LanguageModelSelection { provider, model });
+        self.thread_summary_model = Some(LanguageModelSelection {
+            provider: provider.into(),
+            model,
+        });
+    }
+}
+
+#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq)]
+pub struct LanguageModelParameters {
+    pub provider: Option<LanguageModelProviderSetting>,
+    pub model: Option<SharedString>,
+    pub temperature: Option<f32>,
+}
+
+impl LanguageModelParameters {
+    pub fn matches(&self, model: &Arc<dyn LanguageModel>) -> bool {
+        if let Some(provider) = &self.provider {
+            if provider.0 != model.provider_id().0 {
+                return false;
+            }
+        }
+        if let Some(setting_model) = &self.model {
+            if *setting_model != model.id().0 {
+                return false;
+            }
+        }
+        true
    }
 }

@@ -180,37 +218,37 @@ impl AssistantSettingsContent {
                        .and_then(|provider| match provider {
                            AssistantProviderContentV1::ZedDotDev { default_model } => {
                                default_model.map(|model| LanguageModelSelection {
-                                    provider: "zed.dev".to_string(),
+                                    provider: "zed.dev".into(),
                                    model: model.id().to_string(),
                                })
                            }
                            AssistantProviderContentV1::OpenAi { default_model, .. } => {
                                default_model.map(|model| LanguageModelSelection {
-                                    provider: "openai".to_string(),
+                                    provider: "openai".into(),
                                    model: model.id().to_string(),
                                })
                            }
                            AssistantProviderContentV1::Anthropic { default_model, .. } => {
                                default_model.map(|model| LanguageModelSelection {
-                                    provider: "anthropic".to_string(),
+                                    provider: "anthropic".into(),
                                    model: model.id().to_string(),
                                })
                            }
                            AssistantProviderContentV1::Ollama { default_model, .. } => {
                                default_model.map(|model| LanguageModelSelection {
-                                    provider: "ollama".to_string(),
+                                    provider: "ollama".into(),
                                    model: model.id().to_string(),
                                })
                            }
                            AssistantProviderContentV1::LmStudio { default_model, .. } => {
                                default_model.map(|model| LanguageModelSelection {
-                                    provider: "lmstudio".to_string(),
+                                    provider: "lmstudio".into(),
                                    model: model.id().to_string(),
                                })
                            }
                            AssistantProviderContentV1::DeepSeek { default_model, .. } => {
                                default_model.map(|model| LanguageModelSelection {
-                                    provider: "deepseek".to_string(),
+                                    provider: "deepseek".into(),
                                    model: model.id().to_string(),
                                })
                            }
@@ -226,6 +264,8 @@ impl AssistantSettingsContent {
                    notify_when_agent_waiting: None,
                    stream_edits: None,
                    single_file_review: None,
+                    model_parameters: Vec::new(),
+                    preferred_completion_mode: None,
                },
                VersionedAssistantSettingsContent::V2(ref settings) => settings.clone(),
            },
@@ -236,7 +276,7 @@ impl AssistantSettingsContent {
                default_width: settings.default_width,
                default_height: settings.default_height,
                default_model: Some(LanguageModelSelection {
-                    provider: "openai".to_string(),
+                    provider: "openai".into(),
                    model: settings
                        .default_open_ai_model
                        .clone()
@@ -255,6 +295,8 @@ impl AssistantSettingsContent {
                notify_when_agent_waiting: None,
                stream_edits: None,
                single_file_review: None,
+                model_parameters: Vec::new(),
+                preferred_completion_mode: None,
            },
            None => AssistantSettingsContentV2::default(),
        }
@@ -319,7 +361,7 @@ impl AssistantSettingsContent {
                                    &model,
                                    None,
                                    None,
-                                    language_model.supports_tools(),
+                                    Some(language_model.supports_tools()),
                                )),
                                api_url,
                            });
@@ -367,7 +409,10 @@ impl AssistantSettingsContent {
                    }
                }
                VersionedAssistantSettingsContent::V2(ref mut settings) => {
-                    settings.default_model = Some(LanguageModelSelection { provider, model });
+                    settings.default_model = Some(LanguageModelSelection {
+                        provider: provider.into(),
+                        model,
+                    });
                }
            },
            Some(AssistantSettingsContentInner::Legacy(settings)) => {
@@ -378,7 +423,10 @@ impl AssistantSettingsContent {
            None => {
                self.inner = Some(AssistantSettingsContentInner::for_v2(
                    AssistantSettingsContentV2 {
-                        default_model: Some(LanguageModelSelection { provider, model }),
+                        default_model: Some(LanguageModelSelection {
+                            provider: provider.into(),
+                            model,
+                        }),
                        ..Default::default()
                    },
                ));
@@ -388,7 +436,10 @@ impl AssistantSettingsContent {

    pub fn set_inline_assistant_model(&mut self, provider: String, model: String) {
        self.v2_setting(|setting| {
-            setting.inline_assistant_model = Some(LanguageModelSelection { provider, model });
+            setting.inline_assistant_model = Some(LanguageModelSelection {
+                provider: provider.into(),
+                model,
+            });
            Ok(())
        })
        .ok();
@@ -396,7 +447,10 @@ impl AssistantSettingsContent {

    pub fn set_commit_message_model(&mut self, provider: String, model: String) {
        self.v2_setting(|setting| {
-            setting.commit_message_model = Some(LanguageModelSelection { provider, model });
+            setting.commit_message_model = Some(LanguageModelSelection {
+                provider: provider.into(),
+                model,
+            });
            Ok(())
        })
        .ok();
@@ -424,7 +478,10 @@ impl AssistantSettingsContent {

    pub fn set_thread_summary_model(&mut self, provider: String, model: String) {
        self.v2_setting(|setting| {
-            setting.thread_summary_model = Some(LanguageModelSelection { provider, model });
+            setting.thread_summary_model = Some(LanguageModelSelection {
+                provider: provider.into(),
+                model,
+            });
            Ok(())
        })
        .ok();
@@ -520,6 +577,8 @@ impl Default for VersionedAssistantSettingsContent {
            notify_when_agent_waiting: None,
            stream_edits: None,
            single_file_review: None,
+            model_parameters: Vec::new(),
+            preferred_completion_mode: None,
        })
    }
 }
@@ -583,37 +642,88 @@ pub struct AssistantSettingsContentV2 {
    ///
    /// Default: true
    single_file_review: Option<bool>,
+    /// Additional parameters for language model requests. When making a request
+    /// to a model, parameters will be taken from the last entry in this list
+    /// that matches the model's provider and name. In each entry, both provider
+    /// and model are optional, so that you can specify parameters for either
+    /// one.
+    ///
+    /// Default: []
+    #[serde(default)]
+    model_parameters: Vec<LanguageModelParameters>,
+
+    /// What completion mode to enable for new threads
+    ///
+    /// Default: normal
+    preferred_completion_mode: Option<CompletionMode>,
+}
+
+#[derive(Clone, Copy, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Default)]
+#[serde(rename_all = "snake_case")]
+pub enum CompletionMode {
+    #[default]
+    Normal,
+    Max,
+}
+
+impl From<CompletionMode> for zed_llm_client::CompletionMode {
+    fn from(value: CompletionMode) -> Self {
+        match value {
+            CompletionMode::Normal => zed_llm_client::CompletionMode::Normal,
+            CompletionMode::Max => zed_llm_client::CompletionMode::Max,
+        }
+    }
 }

 #[derive(Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq)]
 pub struct LanguageModelSelection {
-    #[schemars(schema_with = "providers_schema")]
-    pub provider: String,
+    pub provider: LanguageModelProviderSetting,
    pub model: String,
 }

-fn providers_schema(_: &mut schemars::r#gen::SchemaGenerator) -> schemars::schema::Schema {
-    schemars::schema::SchemaObject {
-        enum_values: Some(vec![
-            "anthropic".into(),
-            "bedrock".into(),
-            "google".into(),
-            "lmstudio".into(),
-            "ollama".into(),
-            "openai".into(),
-            "zed.dev".into(),
-            "copilot_chat".into(),
-            "deepseek".into(),
-        ]),
-        ..Default::default()
+#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
+pub struct LanguageModelProviderSetting(pub String);
+
+impl JsonSchema for LanguageModelProviderSetting {
+    fn schema_name() -> String {
+        "LanguageModelProviderSetting".into()
+    }
+
+    fn json_schema(_: &mut schemars::r#gen::SchemaGenerator) -> Schema {
+        schemars::schema::SchemaObject {
+            enum_values: Some(vec![
+                "anthropic".into(),
+                "bedrock".into(),
+                "google".into(),
+                "lmstudio".into(),
+                "ollama".into(),
+                "openai".into(),
+                "zed.dev".into(),
+                "copilot_chat".into(),
+                "deepseek".into(),
+            ]),
+            ..Default::default()
+        }
+        .into()
+    }
+}
+
+impl From<String> for LanguageModelProviderSetting {
+    fn from(provider: String) -> Self {
+        Self(provider)
+    }
+}
+
+impl From<&str> for LanguageModelProviderSetting {
+    fn from(provider: &str) -> Self {
+        Self(provider.to_string())
    }
-    .into()
 }

 impl Default for LanguageModelSelection {
    fn default() -> Self {
        Self {
-            provider: "openai".to_string(),
+            provider: LanguageModelProviderSetting("openai".to_string()),
            model: "gpt-4".to_string(),
        }
    }
@@ -693,7 +803,9 @@ pub struct LegacyAssistantSettingsContent {
 }

 impl Settings for AssistantSettings {
-    const KEY: Option<&'static str> = Some("assistant");
+    const KEY: Option<&'static str> = Some("agent");
+
+    const FALLBACK_KEY: Option<&'static str> = Some("assistant");

    const PRESERVED_KEYS: Option<&'static [&'static str]> = Some(&["version"]);

@@ -748,6 +860,14 @@ impl Settings for AssistantSettings {
            merge(&mut settings.stream_edits, value.stream_edits);
            merge(&mut settings.single_file_review, value.single_file_review);
            merge(&mut settings.default_profile, value.default_profile);
+            merge(
+                &mut settings.preferred_completion_mode,
+                value.preferred_completion_mode,
+            );
+
+            settings
+                .model_parameters
+                .extend_from_slice(&value.model_parameters);

            if let Some(profiles) = value.profiles {
                settings
@@ -826,6 +946,7 @@ fn merge<T>(target: &mut T, value: Option<T>) {
 mod tests {
    use fs::Fs;
    use gpui::{ReadGlobal, TestAppContext};
+    use settings::SettingsStore;

    use super::*;

@@ -880,6 +1001,8 @@ mod tests {
                                notify_when_agent_waiting: None,
                                stream_edits: None,
                                single_file_review: None,
+                                model_parameters: Vec::new(),
+                                preferred_completion_mode: None,
                            },
                        )),
                    }
@@ -894,12 +1017,75 @@ mod tests {

        #[derive(Debug, Deserialize)]
        struct AssistantSettingsTest {
-            assistant: AssistantSettingsContent,
+            agent: AssistantSettingsContent,
        }

        let assistant_settings: AssistantSettingsTest =
            serde_json_lenient::from_str(&raw_settings_value).unwrap();

-        assert!(!assistant_settings.assistant.is_version_outdated());
+        assert!(!assistant_settings.agent.is_version_outdated());
+    }
+
+    #[gpui::test]
+    async fn test_load_settings_from_old_key(cx: &mut TestAppContext) {
+        let fs = fs::FakeFs::new(cx.executor().clone());
+        fs.create_dir(paths::settings_file().parent().unwrap())
+            .await
+            .unwrap();
+
+        cx.update(|cx| {
+            let mut test_settings = settings::SettingsStore::test(cx);
+            let user_settings_content = r#"{
+            "assistant": {
+                "enabled": true,
+                "version": "2",
+                "default_model": {
+                  "provider": "zed.dev",
+                  "model": "gpt-99"
+                },
+            }}"#;
+            test_settings
+                .set_user_settings(user_settings_content, cx)
+                .unwrap();
+            cx.set_global(test_settings);
+            AssistantSettings::register(cx);
+        });
+
+        cx.run_until_parked();
+
+        let assistant_settings = cx.update(|cx| AssistantSettings::get_global(cx).clone());
+        assert!(assistant_settings.enabled);
+        assert!(!assistant_settings.using_outdated_settings_version);
+        assert_eq!(assistant_settings.default_model.model, "gpt-99");
+
+        cx.update_global::<SettingsStore, _>(|settings_store, cx| {
+            settings_store.update_user_settings::<AssistantSettings>(cx, |settings| {
+                *settings = AssistantSettingsContent {
+                    inner: Some(AssistantSettingsContentInner::for_v2(
+                        AssistantSettingsContentV2 {
+                            enabled: Some(false),
+                            default_model: Some(LanguageModelSelection {
+                                provider: "xai".to_owned().into(),
+                                model: "grok".to_owned(),
+                            }),
+                            ..Default::default()
+                        },
+                    )),
+                };
+            });
+        });
+
+        cx.run_until_parked();
+
+        let settings = cx.update(|cx| SettingsStore::global(cx).raw_user_settings().clone());
+
+        #[derive(Debug, Deserialize)]
+        struct AssistantSettingsTest {
+            assistant: AssistantSettingsContent,
+            agent: Option<serde_json_lenient::Value>,
+        }
+
+        let assistant_settings: AssistantSettingsTest = serde_json::from_value(settings).unwrap();
+        assert!(assistant_settings.agent.is_none());
    }
 }
--- a/crates/assistant_slash_commands/src/fetch_command.rs
+++ b/crates/assistant_slash_commands/src/fetch_command.rs
@@ -55,11 +55,14 @@ impl FetchSlashCommand {
        let content_type = content_type
            .to_str()
            .context("invalid Content-Type header")?;
-        let content_type = match content_type {
-            "text/html" => ContentType::Html,
-            "text/plain" => ContentType::Plaintext,
-            "application/json" => ContentType::Json,
-            _ => ContentType::Html,
+        let content_type = if content_type.starts_with("text/html") {
+            ContentType::Html
+        } else if content_type.starts_with("text/plain") {
+            ContentType::Plaintext
+        } else if content_type.starts_with("application/json") {
+            ContentType::Json
+        } else {
+            ContentType::Html
        };

        match content_type {
--- a/crates/assistant_tool/src/action_log.rs
+++ b/crates/assistant_tool/src/action_log.rs
@@ -64,8 +64,20 @@ impl ActionLog {
                let status;
                let unreviewed_changes;
                if is_created {
+                    let existing_file_content = if buffer
+                        .read(cx)
+                        .file()
+                        .map_or(false, |file| file.disk_state().exists())
+                    {
+                        Some(text_snapshot.as_rope().clone())
+                    } else {
+                        None
+                    };
+
                    base_text = Rope::default();
-                    status = TrackedBufferStatus::Created;
+                    status = TrackedBufferStatus::Created {
+                        existing_file_content,
+                    };
                    unreviewed_changes = Patch::new(vec![Edit {
                        old: 0..1,
                        new: 0..text_snapshot.max_point().row + 1,
@@ -128,7 +140,7 @@ impl ActionLog {
        };

        match tracked_buffer.status {
-            TrackedBufferStatus::Created | TrackedBufferStatus::Modified => {
+            TrackedBufferStatus::Created { .. } | TrackedBufferStatus::Modified => {
                if buffer
                    .read(cx)
                    .file()
@@ -289,7 +301,7 @@ impl ActionLog {
    pub fn will_delete_buffer(&mut self, buffer: Entity<Buffer>, cx: &mut Context<Self>) {
        let tracked_buffer = self.track_buffer_internal(buffer.clone(), false, cx);
        match tracked_buffer.status {
-            TrackedBufferStatus::Created => {
+            TrackedBufferStatus::Created { .. } => {
                self.tracked_buffers.remove(&buffer);
                cx.notify();
            }
@@ -373,19 +385,35 @@ impl ActionLog {
            return Task::ready(Ok(()));
        };

-        match tracked_buffer.status {
-            TrackedBufferStatus::Created => {
-                let delete = buffer
-                    .read(cx)
-                    .entry_id(cx)
-                    .and_then(|entry_id| {
-                        self.project
-                            .update(cx, |project, cx| project.delete_entry(entry_id, false, cx))
-                    })
-                    .unwrap_or(Task::ready(Ok(())));
+        match &tracked_buffer.status {
+            TrackedBufferStatus::Created {
+                existing_file_content,
+            } => {
+                let task = if let Some(existing_file_content) = existing_file_content {
+                    buffer.update(cx, |buffer, cx| {
+                        buffer.start_transaction();
+                        buffer.set_text("", cx);
+                        for chunk in existing_file_content.chunks() {
+                            buffer.append(chunk, cx);
+                        }
+                        buffer.end_transaction(cx);
+                    });
+                    self.project
+                        .update(cx, |project, cx| project.save_buffer(buffer.clone(), cx))
+                } else {
+                    buffer
+                        .read(cx)
+                        .entry_id(cx)
+                        .and_then(|entry_id| {
+                            self.project
+                                .update(cx, |project, cx| project.delete_entry(entry_id, false, cx))
+                        })
+                        .unwrap_or(Task::ready(Ok(())))
+                };
+
                self.tracked_buffers.remove(&buffer);
                cx.notify();
-                delete
+                task
            }
            TrackedBufferStatus::Deleted => {
                buffer.update(cx, |buffer, cx| {
@@ -619,9 +647,8 @@ enum ChangeAuthor {
    Agent,
 }

-#[derive(Copy, Clone, Eq, PartialEq)]
 enum TrackedBufferStatus {
-    Created,
+    Created { existing_file_content: Option<Rope> },
    Modified,
    Deleted,
 }
@@ -1009,6 +1036,64 @@ mod tests {
        assert_eq!(unreviewed_hunks(&action_log, cx), vec![]);
    }

+    #[gpui::test(iterations = 10)]
+    async fn test_overwriting_files(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree(
+            path!("/dir"),
+            json!({
+                "file1": "Lorem ipsum dolor"
+            }),
+        )
+        .await;
+        let project = Project::test(fs.clone(), [path!("/dir").as_ref()], cx).await;
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let file_path = project
+            .read_with(cx, |project, cx| project.find_project_path("dir/file1", cx))
+            .unwrap();
+
+        let buffer = project
+            .update(cx, |project, cx| project.open_buffer(file_path, cx))
+            .await
+            .unwrap();
+        cx.update(|cx| {
+            action_log.update(cx, |log, cx| log.buffer_created(buffer.clone(), cx));
+            buffer.update(cx, |buffer, cx| buffer.set_text("sit amet consecteur", cx));
+            action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
+        });
+        project
+            .update(cx, |project, cx| project.save_buffer(buffer.clone(), cx))
+            .await
+            .unwrap();
+        cx.run_until_parked();
+        assert_eq!(
+            unreviewed_hunks(&action_log, cx),
+            vec![(
+                buffer.clone(),
+                vec![HunkStatus {
+                    range: Point::new(0, 0)..Point::new(0, 19),
+                    diff_status: DiffHunkStatusKind::Added,
+                    old_text: "".into(),
+                }],
+            )]
+        );
+
+        action_log
+            .update(cx, |log, cx| {
+                log.reject_edits_in_ranges(buffer.clone(), vec![2..5], cx)
+            })
+            .await
+            .unwrap();
+        cx.run_until_parked();
+        assert_eq!(unreviewed_hunks(&action_log, cx), vec![]);
+        assert_eq!(
+            buffer.read_with(cx, |buffer, _cx| buffer.text()),
+            "Lorem ipsum dolor"
+        );
+    }
+
    #[gpui::test(iterations = 10)]
    async fn test_deleting_files(cx: &mut TestAppContext) {
        init_test(cx);
@@ -1090,7 +1175,7 @@ mod tests {
            .update(cx, |project, cx| project.open_buffer(file2_path, cx))
            .await
            .unwrap();
-        action_log.update(cx, |log, cx| log.buffer_read(buffer2.clone(), cx));
+        action_log.update(cx, |log, cx| log.buffer_created(buffer2.clone(), cx));
        buffer2.update(cx, |buffer, cx| buffer.set_text("IPSUM", cx));
        action_log.update(cx, |log, cx| log.buffer_edited(buffer2.clone(), cx));
        project
@@ -1105,8 +1190,8 @@ mod tests {
                buffer2.clone(),
                vec![HunkStatus {
                    range: Point::new(0, 0)..Point::new(0, 5),
-                    diff_status: DiffHunkStatusKind::Modified,
-                    old_text: "ipsum\n".into(),
+                    diff_status: DiffHunkStatusKind::Added,
+                    old_text: "".into(),
                }],
            )]
        );
--- a/crates/assistant_tool/src/assistant_tool.rs
+++ b/crates/assistant_tool/src/assistant_tool.rs
@@ -7,6 +7,7 @@ mod tool_working_set;
 use std::fmt;
 use std::fmt::Debug;
 use std::fmt::Formatter;
+use std::ops::Deref;
 use std::sync::Arc;

 use anyhow::Result;
@@ -17,7 +18,8 @@ use gpui::IntoElement;
 use gpui::Window;
 use gpui::{App, Entity, SharedString, Task, WeakEntity};
 use icons::IconName;
-use language_model::LanguageModelRequestMessage;
+use language_model::LanguageModel;
+use language_model::LanguageModelRequest;
 use language_model::LanguageModelToolSchemaFormat;
 use project::Project;
 use workspace::Workspace;
@@ -61,11 +63,34 @@ impl ToolUseStatus {
    }
 }

+#[derive(Debug)]
+pub struct ToolResultOutput {
+    pub content: String,
+    pub output: Option<serde_json::Value>,
+}
+
+impl From<String> for ToolResultOutput {
+    fn from(value: String) -> Self {
+        ToolResultOutput {
+            content: value,
+            output: None,
+        }
+    }
+}
+
+impl Deref for ToolResultOutput {
+    type Target = String;
+
+    fn deref(&self) -> &Self::Target {
+        &self.content
+    }
+}
+
 /// The result of running a tool, containing both the asynchronous output
 /// and an optional card view that can be rendered immediately.
 pub struct ToolResult {
    /// The asynchronous task that will eventually resolve to the tool's output
-    pub output: Task<Result<String>>,
+    pub output: Task<Result<ToolResultOutput>>,
    /// An optional view to present the output of the tool.
    pub card: Option<AnyToolCard>,
 }
@@ -128,9 +153,9 @@ impl AnyToolCard {
    }
 }

-impl From<Task<Result<String>>> for ToolResult {
+impl From<Task<Result<ToolResultOutput>>> for ToolResult {
    /// Convert from a task to a ToolResult with no card
-    fn from(output: Task<Result<String>>) -> Self {
+    fn from(output: Task<Result<ToolResultOutput>>) -> Self {
        Self { output, card: None }
    }
 }
@@ -181,12 +206,23 @@ pub trait Tool: 'static + Send + Sync {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        messages: &[LanguageModelRequestMessage],
+        request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        action_log: Entity<ActionLog>,
+        model: Arc<dyn LanguageModel>,
        window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult;
+
+    fn deserialize_card(
+        self: Arc<Self>,
+        _output: serde_json::Value,
+        _project: Entity<Project>,
+        _window: &mut Window,
+        _cx: &mut App,
+    ) -> Option<AnyToolCard> {
+        None
+    }
 }

 impl Debug for dyn Tool {
--- a/crates/assistant_tool/src/tool_schema.rs
+++ b/crates/assistant_tool/src/tool_schema.rs
@@ -35,25 +35,17 @@ fn adapt_to_json_schema_subset(json: &mut Value) -> Result<()> {
            }
        }

-        const KEYS_TO_REMOVE: [&str; 4] = [
+        const KEYS_TO_REMOVE: [&str; 5] = [
            "format",
            "additionalProperties",
            "exclusiveMinimum",
            "exclusiveMaximum",
+            "optional",
        ];
        for key in KEYS_TO_REMOVE {
            obj.remove(key);
        }

-        if let Some(default) = obj.get("default") {
-            let is_null = default.is_null();
-            // Default is not supported, so we need to remove it
-            obj.remove("default");
-            if is_null {
-                obj.insert("nullable".to_string(), Value::Bool(true));
-            }
-        }
-
        // If a type is not specified for an input parameter, add a default type
        if matches!(obj.get("description"), Some(Value::String(_)))
            && !obj.contains_key("type")
@@ -92,26 +84,6 @@ mod tests {
    use super::*;
    use serde_json::json;

-    #[test]
-    fn test_transform_default_null_to_nullable() {
-        let mut json = json!({
-            "description": "A test field",
-            "type": "string",
-            "default": null
-        });
-
-        adapt_to_json_schema_subset(&mut json).unwrap();
-
-        assert_eq!(
-            json,
-            json!({
-                "description": "A test field",
-                "type": "string",
-                "nullable": true
-            })
-        );
-    }
-
    #[test]
    fn test_transform_adds_type_when_missing() {
        let mut json = json!({
@@ -157,7 +129,8 @@ mod tests {
            "format": "uint32",
            "exclusiveMinimum": 0,
            "exclusiveMaximum": 100,
-            "additionalProperties": false
+            "additionalProperties": false,
+            "optional": true
        });

        adapt_to_json_schema_subset(&mut json).unwrap();
--- a/crates/assistant_tools/src/assistant_tools.rs
+++ b/crates/assistant_tools/src/assistant_tools.rs
@@ -1,6 +1,5 @@
 mod copy_path_tool;
 mod create_directory_tool;
-mod create_file_tool;
 mod delete_path_tool;
 mod diagnostics_tool;
 mod edit_agent;
@@ -13,9 +12,7 @@ mod move_path_tool;
 mod now_tool;
 mod open_tool;
 mod read_file_tool;
-mod replace;
 mod schema;
-mod streaming_edit_file_tool;
 mod templates;
 mod terminal_tool;
 mod thinking_tool;
@@ -24,15 +21,12 @@ mod web_search_tool;

 use std::sync::Arc;

-use assistant_settings::AssistantSettings;
 use assistant_tool::ToolRegistry;
 use copy_path_tool::CopyPathTool;
-use feature_flags::{AgentStreamEditsFeatureFlag, FeatureFlagAppExt};
 use gpui::{App, Entity};
 use http_client::HttpClientWithUrl;
 use language_model::LanguageModelRegistry;
 use move_path_tool::MovePathTool;
-use settings::{Settings, SettingsStore};
 use web_search_tool::WebSearchTool;

 pub(crate) use templates::*;
@@ -40,21 +34,19 @@ pub(crate) use templates::*;
 use crate::create_directory_tool::CreateDirectoryTool;
 use crate::delete_path_tool::DeletePathTool;
 use crate::diagnostics_tool::DiagnosticsTool;
+use crate::edit_file_tool::EditFileTool;
 use crate::fetch_tool::FetchTool;
 use crate::find_path_tool::FindPathTool;
 use crate::grep_tool::GrepTool;
 use crate::list_directory_tool::ListDirectoryTool;
 use crate::now_tool::NowTool;
 use crate::read_file_tool::ReadFileTool;
-use crate::streaming_edit_file_tool::StreamingEditFileTool;
 use crate::thinking_tool::ThinkingTool;

-pub use create_file_tool::{CreateFileTool, CreateFileToolInput};
-pub use edit_file_tool::{EditFileTool, EditFileToolInput};
+pub use edit_file_tool::EditFileToolInput;
 pub use find_path_tool::FindPathToolInput;
 pub use open_tool::OpenTool;
 pub use read_file_tool::ReadFileToolInput;
-pub use streaming_edit_file_tool::StreamingEditFileToolInput;
 pub use terminal_tool::TerminalTool;

 pub fn init(http_client: Arc<HttpClientWithUrl>, cx: &mut App) {
@@ -75,12 +67,7 @@ pub fn init(http_client: Arc<HttpClientWithUrl>, cx: &mut App) {
    registry.register_tool(GrepTool);
    registry.register_tool(ThinkingTool);
    registry.register_tool(FetchTool::new(http_client));
-
-    register_edit_file_tool(cx);
-    cx.observe_flag::<AgentStreamEditsFeatureFlag, _>(|_, cx| register_edit_file_tool(cx))
-        .detach();
-    cx.observe_global::<SettingsStore>(register_edit_file_tool)
-        .detach();
+    registry.register_tool(EditFileTool);

    register_web_search_tool(&LanguageModelRegistry::global(cx), cx);
    cx.subscribe(
@@ -107,29 +94,16 @@ fn register_web_search_tool(registry: &Entity<LanguageModelRegistry>, cx: &mut A
    }
 }

-fn register_edit_file_tool(cx: &mut App) {
-    let registry = ToolRegistry::global(cx);
-
-    registry.unregister_tool(CreateFileTool);
-    registry.unregister_tool(EditFileTool);
-    registry.unregister_tool(StreamingEditFileTool);
-
-    if AssistantSettings::get_global(cx).stream_edits(cx) {
-        registry.register_tool(StreamingEditFileTool);
-    } else {
-        registry.register_tool(CreateFileTool);
-        registry.register_tool(EditFileTool);
-    }
-}
-
 #[cfg(test)]
 mod tests {
    use super::*;
+    use assistant_settings::AssistantSettings;
    use client::Client;
    use clock::FakeSystemClock;
    use http_client::FakeHttpClient;
    use schemars::JsonSchema;
    use serde::Serialize;
+    use settings::Settings;

    #[test]
    fn test_json_schema() {
--- a/crates/assistant_tools/src/copy_path_tool.rs
+++ b/crates/assistant_tools/src/copy_path_tool.rs
@@ -3,8 +3,8 @@ use anyhow::{Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolResult};
 use gpui::AnyWindowHandle;
 use gpui::{App, AppContext, Entity, Task};
-use language_model::LanguageModelRequestMessage;
-use language_model::LanguageModelToolSchemaFormat;
+use language_model::LanguageModel;
+use language_model::{LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -74,9 +74,10 @@ impl Tool for CopyPathTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -107,10 +108,9 @@ impl Tool for CopyPathTool {

        cx.background_spawn(async move {
            match copy_task.await {
-                Ok(_) => Ok(format!(
-                    "Copied {} to {}",
-                    input.source_path, input.destination_path
-                )),
+                Ok(_) => Ok(
+                    format!("Copied {} to {}", input.source_path, input.destination_path).into(),
+                ),
                Err(err) => Err(anyhow!(
                    "Failed to copy {} to {}: {}",
                    input.source_path,
--- a/crates/assistant_tools/src/create_directory_tool.rs
+++ b/crates/assistant_tools/src/create_directory_tool.rs
@@ -3,8 +3,7 @@ use anyhow::{Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolResult};
 use gpui::AnyWindowHandle;
 use gpui::{App, Entity, Task};
-use language_model::LanguageModelRequestMessage;
-use language_model::LanguageModelToolSchemaFormat;
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -62,9 +61,10 @@ impl Tool for CreateDirectoryTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -88,7 +88,7 @@ impl Tool for CreateDirectoryTool {
                .await
                .map_err(|err| anyhow!("Unable to create directory {destination_path}: {err}"))?;

-            Ok(format!("Created directory {destination_path}"))
+            Ok(format!("Created directory {destination_path}").into())
        })
        .into()
    }
--- a/crates/assistant_tools/src/create_file_tool.rs
+++ b/crates/assistant_tools/src/create_file_tool.rs
@@ -1,195 +0,0 @@
-use crate::schema::json_schema_for;
-use anyhow::{Result, anyhow};
-use assistant_tool::{ActionLog, Tool, ToolResult};
-use gpui::AnyWindowHandle;
-use gpui::{App, Entity, Task};
-use language_model::LanguageModelRequestMessage;
-use language_model::LanguageModelToolSchemaFormat;
-use project::Project;
-use schemars::JsonSchema;
-use serde::{Deserialize, Serialize};
-use std::sync::Arc;
-use ui::IconName;
-use util::markdown::MarkdownInlineCode;
-
-#[derive(Debug, Serialize, Deserialize, JsonSchema)]
-pub struct CreateFileToolInput {
-    /// The path where the file should be created.
-    ///
-    /// <example>
-    /// If the project has the following structure:
-    ///
-    /// - directory1/
-    /// - directory2/
-    ///
-    /// You can create a new file by providing a path of "directory1/new_file.txt"
-    /// </example>
-    ///
-    /// Make sure to include this field before the `contents` field in the input object
-    /// so that we can display it immediately.
-    pub path: String,
-
-    /// The text contents of the file to create.
-    ///
-    /// <example>
-    /// To create a file with the text "Hello, World!", provide contents of "Hello, World!"
-    /// </example>
-    pub contents: String,
-}
-
-#[derive(Debug, Serialize, Deserialize, JsonSchema)]
-struct PartialInput {
-    #[serde(default)]
-    path: String,
-    #[serde(default)]
-    contents: String,
-}
-
-pub struct CreateFileTool;
-
-const DEFAULT_UI_TEXT: &str = "Create file";
-
-impl Tool for CreateFileTool {
-    fn name(&self) -> String {
-        "create_file".into()
-    }
-
-    fn needs_confirmation(&self, _: &serde_json::Value, _: &App) -> bool {
-        false
-    }
-
-    fn description(&self) -> String {
-        include_str!("./create_file_tool/description.md").into()
-    }
-
-    fn icon(&self) -> IconName {
-        IconName::FileCreate
-    }
-
-    fn input_schema(&self, format: LanguageModelToolSchemaFormat) -> Result<serde_json::Value> {
-        json_schema_for::<CreateFileToolInput>(format)
-    }
-
-    fn ui_text(&self, input: &serde_json::Value) -> String {
-        match serde_json::from_value::<CreateFileToolInput>(input.clone()) {
-            Ok(input) => {
-                let path = MarkdownInlineCode(&input.path);
-                format!("Create file {path}")
-            }
-            Err(_) => DEFAULT_UI_TEXT.to_string(),
-        }
-    }
-
-    fn still_streaming_ui_text(&self, input: &serde_json::Value) -> String {
-        match serde_json::from_value::<PartialInput>(input.clone()).ok() {
-            Some(input) if !input.path.is_empty() => input.path,
-            _ => DEFAULT_UI_TEXT.to_string(),
-        }
-    }
-
-    fn run(
-        self: Arc<Self>,
-        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
-        project: Entity<Project>,
-        action_log: Entity<ActionLog>,
-        _window: Option<AnyWindowHandle>,
-        cx: &mut App,
-    ) -> ToolResult {
-        let input = match serde_json::from_value::<CreateFileToolInput>(input) {
-            Ok(input) => input,
-            Err(err) => return Task::ready(Err(anyhow!(err))).into(),
-        };
-        let project_path = match project.read(cx).find_project_path(&input.path, cx) {
-            Some(project_path) => project_path,
-            None => {
-                return Task::ready(Err(anyhow!("Path to create was outside the project"))).into();
-            }
-        };
-        let contents: Arc<str> = input.contents.as_str().into();
-        let destination_path: Arc<str> = input.path.as_str().into();
-
-        cx.spawn(async move |cx| {
-            let buffer = project
-                .update(cx, |project, cx| {
-                    project.open_buffer(project_path.clone(), cx)
-                })?
-                .await
-                .map_err(|err| anyhow!("Unable to open buffer for {destination_path}: {err}"))?;
-            cx.update(|cx| {
-                action_log.update(cx, |action_log, cx| {
-                    action_log.buffer_created(buffer.clone(), cx)
-                });
-                buffer.update(cx, |buffer, cx| buffer.set_text(contents, cx));
-                action_log.update(cx, |action_log, cx| {
-                    action_log.buffer_edited(buffer.clone(), cx)
-                });
-            })?;
-
-            project
-                .update(cx, |project, cx| project.save_buffer(buffer, cx))?
-                .await
-                .map_err(|err| anyhow!("Unable to save buffer for {destination_path}: {err}"))?;
-
-            Ok(format!("Created file {destination_path}"))
-        })
-        .into()
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use serde_json::json;
-
-    #[test]
-    fn still_streaming_ui_text_with_path() {
-        let tool = CreateFileTool;
-        let input = json!({
-            "path": "src/main.rs",
-            "contents": "fn main() {\n    println!(\"Hello, world!\");\n}"
-        });
-
-        assert_eq!(tool.still_streaming_ui_text(&input), "src/main.rs");
-    }
-
-    #[test]
-    fn still_streaming_ui_text_without_path() {
-        let tool = CreateFileTool;
-        let input = json!({
-            "path": "",
-            "contents": "fn main() {\n    println!(\"Hello, world!\");\n}"
-        });
-
-        assert_eq!(tool.still_streaming_ui_text(&input), DEFAULT_UI_TEXT);
-    }
-
-    #[test]
-    fn still_streaming_ui_text_with_null() {
-        let tool = CreateFileTool;
-        let input = serde_json::Value::Null;
-
-        assert_eq!(tool.still_streaming_ui_text(&input), DEFAULT_UI_TEXT);
-    }
-
-    #[test]
-    fn ui_text_with_valid_input() {
-        let tool = CreateFileTool;
-        let input = json!({
-            "path": "src/main.rs",
-            "contents": "fn main() {\n    println!(\"Hello, world!\");\n}"
-        });
-
-        assert_eq!(tool.ui_text(&input), "Create file `src/main.rs`");
-    }
-
-    #[test]
-    fn ui_text_with_invalid_input() {
-        let tool = CreateFileTool;
-        let input = json!({
-            "invalid": "field"
-        });
-
-        assert_eq!(tool.ui_text(&input), DEFAULT_UI_TEXT);
-    }
-}
--- a/crates/assistant_tools/src/create_file_tool/description.md
+++ b/crates/assistant_tools/src/create_file_tool/description.md
@@ -1,3 +0,0 @@
-Creates a new file at the specified path within the project, containing the given text content. Returns confirmation that the file was created.
-
-This tool is the most efficient way to create new files within the project, so it should always be chosen whenever it's necessary to create a new file in the project with specific text content, or whenever a file in the project needs such a drastic change that you would prefer to replace the entire thing instead of making individual edits. This tool should not be used when making changes to parts of an existing file but not all of it. In those cases, it's better to use another approach to edit the file.
--- a/crates/assistant_tools/src/delete_path_tool.rs
+++ b/crates/assistant_tools/src/delete_path_tool.rs
@@ -3,7 +3,7 @@ use anyhow::{Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolResult};
 use futures::{SinkExt, StreamExt, channel::mpsc};
 use gpui::{AnyWindowHandle, App, AppContext, Entity, Task};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::{Project, ProjectPath};
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -59,9 +59,10 @@ impl Tool for DeletePathTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -127,7 +128,7 @@ impl Tool for DeletePathTool {

            match delete {
                Some(deletion_task) => match deletion_task.await {
-                    Ok(()) => Ok(format!("Deleted {path_str}")),
+                    Ok(()) => Ok(format!("Deleted {path_str}").into()),
                    Err(err) => Err(anyhow!("Failed to delete {path_str}: {err}")),
                },
                None => Err(anyhow!(
--- a/crates/assistant_tools/src/diagnostics_tool.rs
+++ b/crates/assistant_tools/src/diagnostics_tool.rs
@@ -3,7 +3,7 @@ use anyhow::{Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolResult};
 use gpui::{AnyWindowHandle, App, Entity, Task};
 use language::{DiagnosticSeverity, OffsetRangeExt};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -79,9 +79,10 @@ impl Tool for DiagnosticsTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -122,9 +123,9 @@ impl Tool for DiagnosticsTool {
                    }

                    if output.is_empty() {
-                        Ok("File doesn't have errors or warnings!".to_string())
+                        Ok("File doesn't have errors or warnings!".to_string().into())
                    } else {
-                        Ok(output)
+                        Ok(output.into())
                    }
                })
                .into()
@@ -158,10 +159,12 @@ impl Tool for DiagnosticsTool {
                });

                if has_diagnostics {
-                    Task::ready(Ok(output)).into()
+                    Task::ready(Ok(output.into())).into()
                } else {
-                    Task::ready(Ok("No errors or warnings found in the project.".to_string()))
-                        .into()
+                    Task::ready(Ok("No errors or warnings found in the project."
+                        .to_string()
+                        .into()))
+                    .into()
                }
            }
        }
--- a/crates/assistant_tools/src/edit_agent.rs
+++ b/crates/assistant_tools/src/edit_agent.rs
@@ -17,7 +17,7 @@ use gpui::{AppContext, AsyncApp, Entity, SharedString, Task};
 use language::{Bias, Buffer, BufferSnapshot, LineIndent, Point};
 use language_model::{
    LanguageModel, LanguageModelCompletionError, LanguageModelRequest, LanguageModelRequestMessage,
-    MessageContent, Role,
+    LanguageModelToolChoice, MessageContent, Role,
 };
 use project::{AgentLocation, Project};
 use serde::Serialize;
@@ -83,7 +83,7 @@ impl EditAgent {
        &self,
        buffer: Entity<Buffer>,
        edit_description: String,
-        previous_messages: Vec<LanguageModelRequestMessage>,
+        conversation: &LanguageModelRequest,
        cx: &mut AsyncApp,
    ) -> (
        Task<Result<EditAgentOutput>>,
@@ -91,6 +91,7 @@ impl EditAgent {
    ) {
        let this = self.clone();
        let (events_tx, events_rx) = mpsc::unbounded();
+        let conversation = conversation.clone();
        let output = cx.spawn(async move |cx| {
            let snapshot = buffer.read_with(cx, |buffer, _| buffer.snapshot())?;
            let path = cx.update(|cx| snapshot.resolve_file_path(cx, true))?;
@@ -99,7 +100,7 @@ impl EditAgent {
                edit_description,
            }
            .render(&this.templates)?;
-            let new_chunks = this.request(previous_messages, prompt, cx).await?;
+            let new_chunks = this.request(conversation, prompt, cx).await?;

            let (output, mut inner_events) = this.overwrite_with_chunks(buffer, new_chunks, cx);
            while let Some(event) = inner_events.next().await {
@@ -194,7 +195,7 @@ impl EditAgent {
        &self,
        buffer: Entity<Buffer>,
        edit_description: String,
-        previous_messages: Vec<LanguageModelRequestMessage>,
+        conversation: &LanguageModelRequest,
        cx: &mut AsyncApp,
    ) -> (
        Task<Result<EditAgentOutput>>,
@@ -214,6 +215,7 @@ impl EditAgent {

        let this = self.clone();
        let (events_tx, events_rx) = mpsc::unbounded();
+        let conversation = conversation.clone();
        let output = cx.spawn(async move |cx| {
            let snapshot = buffer.read_with(cx, |buffer, _| buffer.snapshot())?;
            let path = cx.update(|cx| snapshot.resolve_file_path(cx, true))?;
@@ -222,7 +224,7 @@ impl EditAgent {
                edit_description,
            }
            .render(&this.templates)?;
-            let edit_chunks = this.request(previous_messages, prompt, cx).await?;
+            let edit_chunks = this.request(conversation, prompt, cx).await?;

            let (output, mut inner_events) = this.apply_edit_chunks(buffer, edit_chunks, cx);
            while let Some(event) = inner_events.next().await {
@@ -269,6 +271,12 @@ impl EditAgent {
            let EditParserEvent::OldText(old_text_query) = edit_event? else {
                continue;
            };
+
+            // Skip edits with an empty old text.
+            if old_text_query.is_empty() {
+                continue;
+            }
+
            let old_text_query = SharedString::from(old_text_query);

            let (edits_tx, edits_rx) = mpsc::unbounded();
@@ -506,32 +514,67 @@ impl EditAgent {

    async fn request(
        &self,
-        mut messages: Vec<LanguageModelRequestMessage>,
+        mut conversation: LanguageModelRequest,
        prompt: String,
        cx: &mut AsyncApp,
    ) -> Result<BoxStream<'static, Result<String, LanguageModelCompletionError>>> {
-        let mut message_content = Vec::new();
-        if let Some(last_message) = messages.last_mut() {
+        let mut messages_iter = conversation.messages.iter_mut();
+        if let Some(last_message) = messages_iter.next_back() {
            if last_message.role == Role::Assistant {
+                let old_content_len = last_message.content.len();
                last_message
                    .content
                    .retain(|content| !matches!(content, MessageContent::ToolUse(_)));
+                let new_content_len = last_message.content.len();
+
+                // We just removed pending tool uses from the content of the
+                // last message, so it doesn't make sense to cache it anymore
+                // (e.g., the message will look very different on the next
+                // request). Thus, we move the flag to the message prior to it,
+                // as it will still be a valid prefix of the conversation.
+                if old_content_len != new_content_len && last_message.cache {
+                    if let Some(prev_message) = messages_iter.next_back() {
+                        last_message.cache = false;
+                        prev_message.cache = true;
+                    }
+                }
+
                if last_message.content.is_empty() {
-                    messages.pop();
+                    conversation.messages.pop();
                }
            }
        }
-        message_content.push(MessageContent::Text(prompt));
-        messages.push(LanguageModelRequestMessage {
+
+        conversation.messages.push(LanguageModelRequestMessage {
            role: Role::User,
-            content: message_content,
+            content: vec![MessageContent::Text(prompt)],
            cache: false,
        });

+        // Include tools in the request so that we can take advantage of
+        // caching when ToolChoice::None is supported.
+        let mut tool_choice = None;
+        let mut tools = Vec::new();
+        if !conversation.tools.is_empty()
+            && self
+                .model
+                .supports_tool_choice(LanguageModelToolChoice::None)
+        {
+            tool_choice = Some(LanguageModelToolChoice::None);
+            tools = conversation.tools.clone();
+        }
+
        let request = LanguageModelRequest {
-            messages,
-            ..Default::default()
+            thread_id: conversation.thread_id,
+            prompt_id: conversation.prompt_id,
+            mode: conversation.mode,
+            messages: conversation.messages,
+            tool_choice,
+            tools,
+            stop: Vec::new(),
+            temperature: None,
        };
+
        Ok(self.model.stream_completion_text(request, cx).await?.stream)
    }

@@ -652,14 +695,16 @@ impl EditAgent {
 }

 fn fuzzy_eq(left: &str, right: &str) -> bool {
+    const THRESHOLD: f64 = 0.8;
+
    let min_levenshtein = left.len().abs_diff(right.len());
    let min_normalized_levenshtein =
-        1. - (min_levenshtein as f32 / cmp::max(left.len(), right.len()) as f32);
-    if min_normalized_levenshtein < 0.8 {
+        1. - (min_levenshtein as f64 / cmp::max(left.len(), right.len()) as f64);
+    if min_normalized_levenshtein < THRESHOLD {
        return false;
    }

-    strsim::normalized_levenshtein(left, right) >= 0.8
+    strsim::normalized_levenshtein(left, right) >= THRESHOLD
 }

 #[derive(Copy, Clone, Debug)]
@@ -740,6 +785,42 @@ mod tests {
    use unindent::Unindent;
    use util::test::{generate_marked_text, marked_text_ranges};

+    #[gpui::test(iterations = 100)]
+    async fn test_empty_old_text(cx: &mut TestAppContext, mut rng: StdRng) {
+        let agent = init_test(cx).await;
+        let buffer = cx.new(|cx| {
+            Buffer::local(
+                indoc! {"
+                    abc
+                    def
+                    ghi
+                "},
+                cx,
+            )
+        });
+        let raw_edits = simulate_llm_output(
+            indoc! {"
+                <old_text></old_text>
+                <new_text>jkl</new_text>
+                <old_text>def</old_text>
+                <new_text>DEF</new_text>
+            "},
+            &mut rng,
+            cx,
+        );
+        let (apply, _events) =
+            agent.apply_edit_chunks(buffer.clone(), raw_edits, &mut cx.to_async());
+        apply.await.unwrap();
+        pretty_assertions::assert_eq!(
+            buffer.read_with(cx, |buffer, _| buffer.snapshot().text()),
+            indoc! {"
+                abc
+                DEF
+                ghi
+            "}
+        );
+    }
+
    #[gpui::test(iterations = 100)]
    async fn test_indentation(cx: &mut TestAppContext, mut rng: StdRng) {
        let agent = init_test(cx).await;
--- a/crates/assistant_tools/src/edit_agent/evals.rs
+++ b/crates/assistant_tools/src/edit_agent/evals.rs
@@ -1,18 +1,17 @@
 use super::*;
-use crate::{
-    ReadFileToolInput, grep_tool::GrepToolInput,
-    streaming_edit_file_tool::StreamingEditFileToolInput,
-};
+use crate::{ReadFileToolInput, edit_file_tool::EditFileToolInput, grep_tool::GrepToolInput};
 use Role::*;
 use anyhow::anyhow;
+use assistant_tool::ToolRegistry;
 use client::{Client, UserStore};
 use collections::HashMap;
 use fs::FakeFs;
 use futures::{FutureExt, future::LocalBoxFuture};
 use gpui::{AppContext, TestAppContext};
-use indoc::indoc;
+use indoc::{formatdoc, indoc};
 use language_model::{
-    LanguageModelRegistry, LanguageModelToolResult, LanguageModelToolUse, LanguageModelToolUseId,
+    LanguageModelRegistry, LanguageModelRequestTool, LanguageModelToolResult, LanguageModelToolUse,
+    LanguageModelToolUseId,
 };
 use project::Project;
 use rand::prelude::*;
@@ -40,7 +39,7 @@ fn eval_extract_handle_command_output() {
            conversation: vec![
                message(
                    User,
-                    [text(indoc! {"
+                    [text(formatdoc! {"
                        Read the `{input_file_path}` file and extract a method in
                        the final stanza of `run_git_blame` to deal with command failures,
                        call it `handle_command_output` and take the std::process::Output as the only parameter.
@@ -69,7 +68,7 @@ fn eval_extract_handle_command_output() {
                    [tool_use(
                        "tool_2",
                        "edit_file",
-                        StreamingEditFileToolInput {
+                        EditFileToolInput {
                            display_description: edit_description.into(),
                            path: input_file_path.into(),
                            create_or_overwrite: false,
@@ -99,7 +98,7 @@ fn eval_delete_run_git_blame() {
            conversation: vec![
                message(
                    User,
-                    [text(indoc! {"
+                    [text(formatdoc! {"
                        Read the `{input_file_path}` file and delete `run_git_blame`. Just that
                        one function, not its usages.
                    "})],
@@ -125,7 +124,7 @@ fn eval_delete_run_git_blame() {
                    [tool_use(
                        "tool_2",
                        "edit_file",
-                        StreamingEditFileToolInput {
+                        EditFileToolInput {
                            display_description: edit_description.into(),
                            path: input_file_path.into(),
                            create_or_overwrite: false,
@@ -141,6 +140,61 @@ fn eval_delete_run_git_blame() {
    );
 }

+#[test]
+#[cfg_attr(not(feature = "eval"), ignore)]
+fn eval_translate_doc_comments() {
+    let input_file_path = "root/canvas.rs";
+    let input_file_content = include_str!("evals/fixtures/translate_doc_comments/before.rs");
+    let edit_description = "Translate all doc comments to Italian";
+    eval(
+        200,
+        1.,
+        EvalInput {
+            conversation: vec![
+                message(
+                    User,
+                    [text(formatdoc! {"
+                        Read the {input_file_path} file and edit it (without overwriting it),
+                        translating all the doc comments to italian.
+                    "})],
+                ),
+                message(
+                    Assistant,
+                    [tool_use(
+                        "tool_1",
+                        "read_file",
+                        ReadFileToolInput {
+                            path: input_file_path.into(),
+                            start_line: None,
+                            end_line: None,
+                        },
+                    )],
+                ),
+                message(
+                    User,
+                    [tool_result("tool_1", "read_file", input_file_content)],
+                ),
+                message(
+                    Assistant,
+                    [tool_use(
+                        "tool_2",
+                        "edit_file",
+                        EditFileToolInput {
+                            display_description: edit_description.into(),
+                            path: input_file_path.into(),
+                            create_or_overwrite: false,
+                        },
+                    )],
+                ),
+            ],
+            input_path: input_file_path.into(),
+            input_content: Some(input_file_content.into()),
+            edit_description: edit_description.into(),
+            assertion: EvalAssertion::judge_diff("Doc comments were translated to Italian"),
+        },
+    );
+}
+
 #[test]
 #[cfg_attr(not(feature = "eval"), ignore)]
 fn eval_use_wasi_sdk_in_compile_parser_to_wasm() {
@@ -155,7 +209,7 @@ fn eval_use_wasi_sdk_in_compile_parser_to_wasm() {
            conversation: vec![
                message(
                    User,
-                    [text(indoc! {"
+                    [text(formatdoc! {"
                        Read the `{input_file_path}` file and change `compile_parser_to_wasm` to use `wasi-sdk` instead of emscripten.
                        Use `ureq` to download the SDK for the current platform and architecture.
                        Extract the archive into a sibling of `lib` inside the `tree-sitter` directory in the cache_dir.
@@ -163,7 +217,7 @@ fn eval_use_wasi_sdk_in_compile_parser_to_wasm() {
                        that's inside of the archive.
                        Don't re-download the SDK if that executable already exists.

-                        Use these clang flags: -fPIC -shared -Os -Wl,--export=tree_sitter_{language_name}
+                        Use these clang flags: -fPIC -shared -Os -Wl,--export=tree_sitter_{{language_name}}

                        Here are the available wasi-sdk assets:
                        - wasi-sdk-25.0-x86_64-macos.tar.gz
@@ -240,7 +294,7 @@ fn eval_use_wasi_sdk_in_compile_parser_to_wasm() {
                    [tool_use(
                        "tool_4",
                        "edit_file",
-                        StreamingEditFileToolInput {
+                        EditFileToolInput {
                            display_description: edit_description.into(),
                            path: input_file_path.into(),
                            create_or_overwrite: false,
@@ -264,11 +318,10 @@ fn eval_use_wasi_sdk_in_compile_parser_to_wasm() {
 fn eval_disable_cursor_blinking() {
    let input_file_path = "root/editor.rs";
    let input_file_content = include_str!("evals/fixtures/disable_cursor_blinking/before.rs");
-    let output_file_content = include_str!("evals/fixtures/disable_cursor_blinking/after.rs");
    let edit_description = "Comment out the call to `BlinkManager::enable`";
    eval(
-        100,
-        0.6, // TODO: make this eval better
+        200,
+        0.95,
        EvalInput {
            conversation: vec![
                message(User, [text("Let's research how to cursor blinking works.")]),
@@ -316,7 +369,7 @@ fn eval_disable_cursor_blinking() {
                    [tool_use(
                        "tool_4",
                        "edit_file",
-                        StreamingEditFileToolInput {
+                        EditFileToolInput {
                            display_description: edit_description.into(),
                            path: input_file_path.into(),
                            create_or_overwrite: false,
@@ -327,7 +380,11 @@ fn eval_disable_cursor_blinking() {
            input_path: input_file_path.into(),
            input_content: Some(input_file_content.into()),
            edit_description: edit_description.into(),
-            assertion: EvalAssertion::assert_eq(output_file_content),
+            assertion: EvalAssertion::judge_diff(indoc! {"
+                - Calls to BlinkManager in `observe_window_activation` were commented out
+                - The call to `blink_manager.enable` above the call to show_cursor_names was commented out
+                - All the edits have valid indentation
+            "}),
        },
    );
 }
@@ -506,7 +563,7 @@ fn eval_from_pixels_constructor() {
                    [tool_use(
                        "tool_5",
                        "edit_file",
-                        StreamingEditFileToolInput {
+                        EditFileToolInput {
                            display_description: edit_description.into(),
                            path: input_file_path.into(),
                            create_or_overwrite: false,
@@ -583,7 +640,7 @@ fn eval_zode() {
                        tool_use(
                            "tool_3",
                            "edit_file",
-                            StreamingEditFileToolInput {
+                            EditFileToolInput {
                                display_description: edit_description.into(),
                                path: input_file_path.into(),
                                create_or_overwrite: true,
@@ -623,6 +680,230 @@ fn eval_zode() {
    );
 }

+#[test]
+#[cfg_attr(not(feature = "eval"), ignore)]
+fn eval_add_overwrite_test() {
+    let input_file_path = "root/action_log.rs";
+    let input_file_content = include_str!("evals/fixtures/add_overwrite_test/before.rs");
+    let edit_description = "Add a new test for overwriting a file in action_log.rs";
+    eval(
+        200,
+        0.5, // TODO: make this eval better
+        EvalInput {
+            conversation: vec![
+                message(
+                    User,
+                    [text(indoc! {"
+                        Introduce a new test in `action_log.rs` to test overwriting a file.
+                        That is, a file already exists, but we call `buffer_created` as if the file were new.
+                        Take inspiration from all the other tests in the file.
+                    "})],
+                ),
+                message(
+                    Assistant,
+                    [tool_use(
+                        "tool_1",
+                        "read_file",
+                        ReadFileToolInput {
+                            path: input_file_path.into(),
+                            start_line: None,
+                            end_line: None,
+                        },
+                    )],
+                ),
+                message(
+                    User,
+                    [tool_result(
+                        "tool_1",
+                        "read_file",
+                        indoc! {"
+                            pub struct ActionLog [L13-20]
+                             tracked_buffers [L15]
+                             edited_since_project_diagnostics_check [L17]
+                             project [L19]
+                            impl ActionLog [L22-498]
+                             pub fn new [L24-30]
+                             pub fn project [L32-34]
+                             pub fn checked_project_diagnostics [L37-39]
+                             pub fn has_edited_files_since_project_diagnostics_check [L42-44]
+                             fn track_buffer_internal [L46-101]
+                             fn handle_buffer_event [L103-116]
+                             fn handle_buffer_edited [L118-123]
+                             fn handle_buffer_file_changed [L125-158]
+                             async fn maintain_diff [L160-264]
+                             pub fn buffer_read [L267-269]
+                             pub fn buffer_created [L272-276]
+                             pub fn buffer_edited [L279-287]
+                             pub fn will_delete_buffer [L289-304]
+                             pub fn keep_edits_in_range [L306-364]
+                             pub fn reject_edits_in_ranges [L366-459]
+                             pub fn keep_all_edits [L461-473]
+                             pub fn changed_buffers [L476-482]
+                             pub fn stale_buffers [L485-497]
+                            fn apply_non_conflicting_edits [L500-561]
+                            fn diff_snapshots [L563-585]
+                            fn point_to_row_edit [L587-614]
+                            enum ChangeAuthor [L617-620]
+                             User [L618]
+                             Agent [L619]
+                            enum TrackedBufferStatus [L623-627]
+                             Created [L624]
+                             Modified [L625]
+                             Deleted [L626]
+                            struct TrackedBuffer [L629-641]
+                             buffer [L630]
+                             base_text [L631]
+                             unreviewed_changes [L632]
+                             status [L633]
+                             version [L634]
+                             diff [L635]
+                             snapshot [L636]
+                             diff_update [L637]
+                             _open_lsp_handle [L638]
+                             _maintain_diff [L639]
+                             _subscription [L640]
+                            impl TrackedBuffer [L643-657]
+                             fn has_changes [L644-650]
+                             fn schedule_diff_update [L652-656]
+                            pub struct ChangedBuffer [L659-661]
+                             pub diff [L660]
+                            mod tests [L664-1574]
+                             fn init_logger [L678-682]
+                             fn init_test [L684-691]
+                             async fn test_keep_edits [L694-769]
+                             async fn test_deletions [L772-854]
+                             async fn test_overlapping_user_edits [L857-951]
+                             async fn test_creating_files [L954-1010]
+                             async fn test_deleting_files [L1013-1120]
+                             async fn test_reject_edits [L1123-1255]
+                             async fn test_reject_multiple_edits [L1258-1331]
+                             async fn test_reject_deleted_file [L1334-1388]
+                             async fn test_reject_created_file [L1391-1443]
+                             async fn test_random_diffs [L1446-1535]
+                              fn quiesce [L1510-1534]
+                             struct HunkStatus [L1538-1542]
+                              range [L1539]
+                              diff_status [L1540]
+                              old_text [L1541]
+                             fn unreviewed_hunks [L1544-1573]
+
+                            Showing symbols 1-69 (total symbols: 69)
+
+                            Using the line numbers in this outline, you can call this tool again while specifying
+                            the start_line and end_line fields to see the implementations of symbols in the outline.
+                        "},
+                    )],
+                ),
+                message(
+                    Assistant,
+                    [
+                        text(
+                            "Let's look at the existing test cases that are related to file creation to understand the pattern:",
+                        ),
+                        tool_use(
+                            "tool_2",
+                            "read_file",
+                            ReadFileToolInput {
+                                path: input_file_path.into(),
+                                start_line: Some(953),
+                                end_line: Some(1010),
+                            },
+                        ),
+                    ],
+                ),
+                message(
+                    User,
+                    [tool_result(
+                        "tool_2",
+                        "read_file",
+                        lines(input_file_content, 953..1010),
+                    )],
+                ),
+                message(
+                    Assistant,
+                    [
+                        text(
+                            "Now let's look at another relevant test to understand how they're structured:",
+                        ),
+                        tool_use(
+                            "tool_3",
+                            "read_file",
+                            ReadFileToolInput {
+                                path: input_file_path.into(),
+                                start_line: Some(1012),
+                                end_line: Some(1120),
+                            },
+                        ),
+                    ],
+                ),
+                message(
+                    User,
+                    [tool_result(
+                        "tool_3",
+                        "read_file",
+                        lines(input_file_content, 1012..1120),
+                    )],
+                ),
+                message(
+                    Assistant,
+                    [
+                        text("Now let's look at how `buffer_created` is implemented:"),
+                        tool_use(
+                            "tool_4",
+                            "read_file",
+                            ReadFileToolInput {
+                                path: input_file_path.into(),
+                                start_line: Some(271),
+                                end_line: Some(276),
+                            },
+                        ),
+                    ],
+                ),
+                message(
+                    User,
+                    [tool_result(
+                        "tool_4",
+                        "read_file",
+                        lines(input_file_content, 271..276),
+                    )],
+                ),
+                message(
+                    Assistant,
+                    [
+                        text(indoc! {"
+                            Based on my understanding of the existing tests and code, I'll now create a new test for overwriting a file. In this test, we'll:
+
+                            1. Create a file
+                            2. Open a buffer for it
+                            3. Track it in the action log
+                            4. Modify the buffer
+                            5. Call `buffer_created` again as if the file were new
+                            6. Check that the changes are properly tracked
+
+                            Let's write the test:
+                        "}),
+                        tool_use(
+                            "tool_5",
+                            "edit_file",
+                            EditFileToolInput {
+                                display_description: edit_description.into(),
+                                path: input_file_path.into(),
+                                create_or_overwrite: false,
+                            },
+                        ),
+                    ],
+                ),
+            ],
+            input_path: input_file_path.into(),
+            input_content: Some(input_file_content.into()),
+            edit_description: edit_description.into(),
+            assertion: EvalAssertion::judge_diff(
+                "A new test for overwritten files was created, without changing any previous test",
+            ),
+        },
+    );
+}
+
 fn message(
    role: Role,
    contents: impl IntoIterator<Item = MessageContent>,
@@ -671,6 +952,7 @@ fn tool_result(
        tool_name: name.into(),
        is_error: false,
        content: result.into(),
+        output: None,
    })
 }

@@ -809,7 +1091,8 @@ impl EvalAssertion {

 fn eval(iterations: usize, expected_pass_ratio: f32, mut eval: EvalInput) {
    let mut evaluated_count = 0;
-    report_progress(evaluated_count, iterations);
+    let mut failed_count = 0;
+    report_progress(evaluated_count, failed_count, iterations);

    let (tx, rx) = mpsc::channel();

@@ -826,7 +1109,6 @@ fn eval(iterations: usize, expected_pass_ratio: f32, mut eval: EvalInput) {
    }
    drop(tx);

-    let mut failed_count = 0;
    let mut failed_evals = HashMap::default();
    let mut errored_evals = HashMap::default();
    let mut eval_outputs = Vec::new();
@@ -851,7 +1133,7 @@ fn eval(iterations: usize, expected_pass_ratio: f32, mut eval: EvalInput) {
        }

        evaluated_count += 1;
-        report_progress(evaluated_count, iterations);
+        report_progress(evaluated_count, failed_count, iterations);
    }

    let actual_pass_ratio = (iterations - failed_count) as f32 / iterations as f32;
@@ -879,7 +1161,7 @@ fn eval(iterations: usize, expected_pass_ratio: f32, mut eval: EvalInput) {

    let mismatched_tag_ratio =
        cumulative_parser_metrics.mismatched_tags as f32 / cumulative_parser_metrics.tags as f32;
-    if mismatched_tag_ratio > 0.02 {
+    if mismatched_tag_ratio > 0.05 {
        for eval_output in eval_outputs {
            println!("{}", eval_output);
        }
@@ -922,8 +1204,19 @@ impl Display for EvalOutput {
    }
 }

-fn report_progress(evaluated_count: usize, iterations: usize) {
-    print!("\r\x1b[KEvaluated {}/{}", evaluated_count, iterations);
+fn report_progress(evaluated_count: usize, failed_count: usize, iterations: usize) {
+    let passed_count = evaluated_count - failed_count;
+    let passed_ratio = if evaluated_count == 0 {
+        0.0
+    } else {
+        passed_count as f64 / evaluated_count as f64
+    };
+    print!(
+        "\r\x1b[KEvaluated {}/{} ({:.2}%)",
+        evaluated_count,
+        iterations,
+        passed_ratio * 100.0
+    );
    std::io::stdout().flush().unwrap();
 }

@@ -936,28 +1229,33 @@ struct EditAgentTest {
 impl EditAgentTest {
    async fn new(cx: &mut TestAppContext) -> Self {
        cx.executor().allow_parking();
-        cx.update(settings::init);
-        cx.update(Project::init_settings);
-        cx.update(language::init);
-        cx.update(gpui_tokio::init);
-        cx.update(client::init_settings);

        let fs = FakeFs::new(cx.executor().clone());
+        cx.update(|cx| {
+            settings::init(cx);
+            gpui_tokio::init(cx);
+            let http_client = Arc::new(ReqwestClient::user_agent("agent tests").unwrap());
+            cx.set_http_client(http_client);
+
+            client::init_settings(cx);
+            let client = Client::production(cx);
+            let user_store = cx.new(|cx| UserStore::new(client.clone(), cx));
+
+            settings::init(cx);
+            Project::init_settings(cx);
+            language::init(cx);
+            language_model::init(client.clone(), cx);
+            language_models::init(user_store.clone(), client.clone(), fs.clone(), cx);
+            crate::init(client.http_client(), cx);
+        });
+
        fs.insert_tree("/root", json!({})).await;
        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
        let (agent_model, judge_model) = cx
            .update(|cx| {
-                let http_client = ReqwestClient::user_agent("agent tests").unwrap();
-                cx.set_http_client(Arc::new(http_client));
-
-                let client = Client::production(cx);
-                let user_store = cx.new(|cx| UserStore::new(client.clone(), cx));
-                language_model::init(client.clone(), cx);
-                language_models::init(user_store.clone(), client.clone(), fs.clone(), cx);
-
                cx.spawn(async move |cx| {
                    let agent_model =
-                        Self::load_model("google", "gemini-2.5-pro-preview-03-25", cx).await;
+                        Self::load_model("anthropic", "claude-3-7-sonnet-latest", cx).await;
                    let judge_model =
                        Self::load_model("anthropic", "claude-3-7-sonnet-latest", cx).await;
                    (agent_model.unwrap(), judge_model.unwrap())
@@ -1003,12 +1301,32 @@ impl EditAgentTest {
            .update(cx, |project, cx| project.open_buffer(path, cx))
            .await
            .unwrap();
+        let conversation = LanguageModelRequest {
+            messages: eval.conversation,
+            tools: cx.update(|cx| {
+                ToolRegistry::default_global(cx)
+                    .tools()
+                    .into_iter()
+                    .filter_map(|tool| {
+                        let input_schema = tool
+                            .input_schema(self.agent.model.tool_input_format())
+                            .ok()?;
+                        Some(LanguageModelRequestTool {
+                            name: tool.name(),
+                            description: tool.description(),
+                            input_schema,
+                        })
+                    })
+                    .collect()
+            }),
+            ..Default::default()
+        };
        let edit_output = if let Some(input_content) = eval.input_content.as_deref() {
            buffer.update(cx, |buffer, cx| buffer.set_text(input_content, cx));
            let (edit_output, _) = self.agent.edit(
                buffer.clone(),
                eval.edit_description,
-                eval.conversation,
+                &conversation,
                &mut cx.to_async(),
            );
            edit_output.await?
@@ -1016,7 +1334,7 @@ impl EditAgentTest {
            let (edit_output, _) = self.agent.overwrite(
                buffer.clone(),
                eval.edit_description,
-                eval.conversation,
+                &conversation,
                &mut cx.to_async(),
            );
            edit_output.await?
--- a/crates/assistant_tools/src/edit_agent/evals/fixtures/add_overwrite_test/before.rs
+++ b/crates/assistant_tools/src/edit_agent/evals/fixtures/add_overwrite_test/before.rs
--- a/crates/assistant_tools/src/edit_agent/evals/fixtures/disable_cursor_blinking/after.rs
+++ b/crates/assistant_tools/src/edit_agent/evals/fixtures/disable_cursor_blinking/after.rs
--- a/crates/assistant_tools/src/edit_agent/evals/fixtures/translate_doc_comments/before.rs
+++ b/crates/assistant_tools/src/edit_agent/evals/fixtures/translate_doc_comments/before.rs
@@ -0,0 +1,339 @@
+// font-kit/src/canvas.rs
+//
+// Copyright © 2018 The Pathfinder Project Developers.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! An in-memory bitmap surface for glyph rasterization.
+
+use lazy_static::lazy_static;
+use pathfinder_geometry::rect::RectI;
+use pathfinder_geometry::vector::Vector2I;
+use std::cmp;
+use std::fmt;
+
+use crate::utils;
+
+lazy_static! {
+    static ref BITMAP_1BPP_TO_8BPP_LUT: [[u8; 8]; 256] = {
+        let mut lut = [[0; 8]; 256];
+        for byte in 0..0x100 {
+            let mut value = [0; 8];
+            for bit in 0..8 {
+                if (byte & (0x80 >> bit)) != 0 {
+                    value[bit] = 0xff;
+                }
+            }
+            lut[byte] = value
+        }
+        lut
+    };
+}
+
+/// An in-memory bitmap surface for glyph rasterization.
+pub struct Canvas {
+    /// The raw pixel data.
+    pub pixels: Vec<u8>,
+    /// The size of the buffer, in pixels.
+    pub size: Vector2I,
+    /// The number of *bytes* between successive rows.
+    pub stride: usize,
+    /// The image format of the canvas.
+    pub format: Format,
+}
+
+impl Canvas {
+    /// Creates a new blank canvas with the given pixel size and format.
+    ///
+    /// Stride is automatically calculated from width.
+    ///
+    /// The canvas is initialized with transparent black (all values 0).
+    #[inline]
+    pub fn new(size: Vector2I, format: Format) -> Canvas {
+        Canvas::with_stride(
+            size,
+            size.x() as usize * format.bytes_per_pixel() as usize,
+            format,
+        )
+    }
+
+    /// Creates a new blank canvas with the given pixel size, stride (number of bytes between
+    /// successive rows), and format.
+    ///
+    /// The canvas is initialized with transparent black (all values 0).
+    pub fn with_stride(size: Vector2I, stride: usize, format: Format) -> Canvas {
+        Canvas {
+            pixels: vec![0; stride * size.y() as usize],
+            size,
+            stride,
+            format,
+        }
+    }
+
+    #[allow(dead_code)]
+    pub(crate) fn blit_from_canvas(&mut self, src: &Canvas) {
+        self.blit_from(
+            Vector2I::default(),
+            &src.pixels,
+            src.size,
+            src.stride,
+            src.format,
+        )
+    }
+
+    /// Blits to a rectangle with origin at `dst_point` and size according to `src_size`.
+    /// If the target area overlaps the boundaries of the canvas, only the drawable region is blitted.
+    /// `dst_point` and `src_size` are specified in pixels. `src_stride` is specified in bytes.
+    /// `src_stride` must be equal or larger than the actual data length.
+    #[allow(dead_code)]
+    pub(crate) fn blit_from(
+        &mut self,
+        dst_point: Vector2I,
+        src_bytes: &[u8],
+        src_size: Vector2I,
+        src_stride: usize,
+        src_format: Format,
+    ) {
+        assert_eq!(
+            src_stride * src_size.y() as usize,
+            src_bytes.len(),
+            "Number of pixels in src_bytes does not match stride and size."
+        );
+        assert!(
+            src_stride >= src_size.x() as usize * src_format.bytes_per_pixel() as usize,
+            "src_stride must be >= than src_size.x()"
+        );
+
+        let dst_rect = RectI::new(dst_point, src_size);
+        let dst_rect = dst_rect.intersection(RectI::new(Vector2I::default(), self.size));
+        let dst_rect = match dst_rect {
+            Some(dst_rect) => dst_rect,
+            None => return,
+        };
+
+        match (self.format, src_format) {
+            (Format::A8, Format::A8)
+            | (Format::Rgb24, Format::Rgb24)
+            | (Format::Rgba32, Format::Rgba32) => {
+                self.blit_from_with::<BlitMemcpy>(dst_rect, src_bytes, src_stride, src_format)
+            }
+            (Format::A8, Format::Rgb24) => {
+                self.blit_from_with::<BlitRgb24ToA8>(dst_rect, src_bytes, src_stride, src_format)
+            }
+            (Format::Rgb24, Format::A8) => {
+                self.blit_from_with::<BlitA8ToRgb24>(dst_rect, src_bytes, src_stride, src_format)
+            }
+            (Format::Rgb24, Format::Rgba32) => self
+                .blit_from_with::<BlitRgba32ToRgb24>(dst_rect, src_bytes, src_stride, src_format),
+            (Format::Rgba32, Format::Rgb24) => self
+                .blit_from_with::<BlitRgb24ToRgba32>(dst_rect, src_bytes, src_stride, src_format),
+            (Format::Rgba32, Format::A8) | (Format::A8, Format::Rgba32) => unimplemented!(),
+        }
+    }
+
+    #[allow(dead_code)]
+    pub(crate) fn blit_from_bitmap_1bpp(
+        &mut self,
+        dst_point: Vector2I,
+        src_bytes: &[u8],
+        src_size: Vector2I,
+        src_stride: usize,
+    ) {
+        if self.format != Format::A8 {
+            unimplemented!()
+        }
+
+        let dst_rect = RectI::new(dst_point, src_size);
+        let dst_rect = dst_rect.intersection(RectI::new(Vector2I::default(), self.size));
+        let dst_rect = match dst_rect {
+            Some(dst_rect) => dst_rect,
+            None => return,
+        };
+
+        let size = dst_rect.size();
+
+        let dest_bytes_per_pixel = self.format.bytes_per_pixel() as usize;
+        let dest_row_stride = size.x() as usize * dest_bytes_per_pixel;
+        let src_row_stride = utils::div_round_up(size.x() as usize, 8);
+
+        for y in 0..size.y() {
+            let (dest_row_start, src_row_start) = (
+                (y + dst_rect.origin_y()) as usize * self.stride
+                    + dst_rect.origin_x() as usize * dest_bytes_per_pixel,
+                y as usize * src_stride,
+            );
+            let dest_row_end = dest_row_start + dest_row_stride;
+            let src_row_end = src_row_start + src_row_stride;
+            let dest_row_pixels = &mut self.pixels[dest_row_start..dest_row_end];
+            let src_row_pixels = &src_bytes[src_row_start..src_row_end];
+            for x in 0..src_row_stride {
+                let pattern = &BITMAP_1BPP_TO_8BPP_LUT[src_row_pixels[x] as usize];
+                let dest_start = x * 8;
+                let dest_end = cmp::min(dest_start + 8, dest_row_stride);
+                let src = &pattern[0..(dest_end - dest_start)];
+                dest_row_pixels[dest_start..dest_end].clone_from_slice(src);
+            }
+        }
+    }
+
+    /// Blits to area `rect` using the data given in the buffer `src_bytes`.
+    /// `src_stride` must be specified in bytes.
+    /// The dimensions of `rect` must be in pixels.
+    fn blit_from_with<B: Blit>(
+        &mut self,
+        rect: RectI,
+        src_bytes: &[u8],
+        src_stride: usize,
+        src_format: Format,
+    ) {
+        let src_bytes_per_pixel = src_format.bytes_per_pixel() as usize;
+        let dest_bytes_per_pixel = self.format.bytes_per_pixel() as usize;
+
+        for y in 0..rect.height() {
+            let (dest_row_start, src_row_start) = (
+                (y + rect.origin_y()) as usize * self.stride
+                    + rect.origin_x() as usize * dest_bytes_per_pixel,
+                y as usize * src_stride,
+            );
+            let dest_row_end = dest_row_start + rect.width() as usize * dest_bytes_per_pixel;
+            let src_row_end = src_row_start + rect.width() as usize * src_bytes_per_pixel;
+            let dest_row_pixels = &mut self.pixels[dest_row_start..dest_row_end];
+            let src_row_pixels = &src_bytes[src_row_start..src_row_end];
+            B::blit(dest_row_pixels, src_row_pixels)
+        }
+    }
+}
+
+impl fmt::Debug for Canvas {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.debug_struct("Canvas")
+            .field("pixels", &self.pixels.len()) // Do not dump a vector content.
+            .field("size", &self.size)
+            .field("stride", &self.stride)
+            .field("format", &self.format)
+            .finish()
+    }
+}
+
+/// The image format for the canvas.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum Format {
+    /// Premultiplied R8G8B8A8, little-endian.
+    Rgba32,
+    /// R8G8B8, little-endian.
+    Rgb24,
+    /// A8.
+    A8,
+}
+
+impl Format {
+    /// Returns the number of bits per pixel that this image format corresponds to.
+    #[inline]
+    pub fn bits_per_pixel(self) -> u8 {
+        match self {
+            Format::Rgba32 => 32,
+            Format::Rgb24 => 24,
+            Format::A8 => 8,
+        }
+    }
+
+    /// Returns the number of color channels per pixel that this image format corresponds to.
+    #[inline]
+    pub fn components_per_pixel(self) -> u8 {
+        match self {
+            Format::Rgba32 => 4,
+            Format::Rgb24 => 3,
+            Format::A8 => 1,
+        }
+    }
+
+    /// Returns the number of bits per color channel that this image format contains.
+    #[inline]
+    pub fn bits_per_component(self) -> u8 {
+        self.bits_per_pixel() / self.components_per_pixel()
+    }
+
+    /// Returns the number of bytes per pixel that this image format corresponds to.
+    #[inline]
+    pub fn bytes_per_pixel(self) -> u8 {
+        self.bits_per_pixel() / 8
+    }
+}
+
+/// The antialiasing strategy that should be used when rasterizing glyphs.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum RasterizationOptions {
+    /// "Black-and-white" rendering. Each pixel is either entirely on or off.
+    Bilevel,
+    /// Grayscale antialiasing. Only one channel is used.
+    GrayscaleAa,
+    /// Subpixel RGB antialiasing, for LCD screens.
+    SubpixelAa,
+}
+
+trait Blit {
+    fn blit(dest: &mut [u8], src: &[u8]);
+}
+
+struct BlitMemcpy;
+
+impl Blit for BlitMemcpy {
+    #[inline]
+    fn blit(dest: &mut [u8], src: &[u8]) {
+        dest.clone_from_slice(src)
+    }
+}
+
+struct BlitRgb24ToA8;
+
+impl Blit for BlitRgb24ToA8 {
+    #[inline]
+    fn blit(dest: &mut [u8], src: &[u8]) {
+        // TODO(pcwalton): SIMD.
+        for (dest, src) in dest.iter_mut().zip(src.chunks(3)) {
+            *dest = src[1]
+        }
+    }
+}
+
+struct BlitA8ToRgb24;
+
+impl Blit for BlitA8ToRgb24 {
+    #[inline]
+    fn blit(dest: &mut [u8], src: &[u8]) {
+        for (dest, src) in dest.chunks_mut(3).zip(src.iter()) {
+            dest[0] = *src;
+            dest[1] = *src;
+            dest[2] = *src;
+        }
+    }
+}
+
+struct BlitRgba32ToRgb24;
+
+impl Blit for BlitRgba32ToRgb24 {
+    #[inline]
+    fn blit(dest: &mut [u8], src: &[u8]) {
+        // TODO(pcwalton): SIMD.
+        for (dest, src) in dest.chunks_mut(3).zip(src.chunks(4)) {
+            dest.copy_from_slice(&src[0..3])
+        }
+    }
+}
+
+struct BlitRgb24ToRgba32;
+
+impl Blit for BlitRgb24ToRgba32 {
+    fn blit(dest: &mut [u8], src: &[u8]) {
+        for (dest, src) in dest.chunks_mut(4).zip(src.chunks(3)) {
+            dest[0] = src[0];
+            dest[1] = src[1];
+            dest[2] = src[2];
+            dest[3] = 255;
+        }
+    }
+}
--- a/crates/assistant_tools/src/edit_file_tool.rs
+++ b/crates/assistant_tools/src/edit_file_tool.rs
@@ -1,21 +1,26 @@
 use crate::{
-    replace::{replace_exact, replace_with_flexible_indent},
+    Templates,
+    edit_agent::{EditAgent, EditAgentOutputEvent},
    schema::json_schema_for,
 };
-use anyhow::{Context as _, Result, anyhow};
-use assistant_tool::{ActionLog, AnyToolCard, Tool, ToolCard, ToolResult, ToolUseStatus};
-use buffer_diff::{BufferDiff, BufferDiffSnapshot};
-use editor::{Editor, EditorElement, EditorMode, EditorStyle, MultiBuffer, PathKey};
-use gpui::{
-    Animation, AnimationExt, AnyWindowHandle, App, AppContext, AsyncApp, Context, Entity, EntityId,
-    Task, TextStyle, WeakEntity, pulsating_between,
+use anyhow::{Result, anyhow};
+use assistant_tool::{
+    ActionLog, AnyToolCard, Tool, ToolCard, ToolResult, ToolResultOutput, ToolUseStatus,
 };
+use buffer_diff::{BufferDiff, BufferDiffSnapshot};
+use editor::{Editor, EditorMode, MultiBuffer, PathKey};
+use futures::StreamExt;
+use gpui::{
+    Animation, AnimationExt, AnyWindowHandle, App, AppContext, AsyncApp, Entity, EntityId, Task,
+    TextStyleRefinement, WeakEntity, pulsating_between,
+};
+use indoc::formatdoc;
 use language::{
    Anchor, Buffer, Capability, LanguageRegistry, LineEnding, OffsetRangeExt, Rope, TextBuffer,
    language_settings::SoftWrap,
 };
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
-use project::{AgentLocation, Project};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
+use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use settings::Settings;
@@ -25,7 +30,7 @@ use std::{
    time::Duration,
 };
 use theme::ThemeSettings;
-use ui::{Disclosure, Tooltip, Window, prelude::*};
+use ui::{Disclosure, Tooltip, prelude::*};
 use util::ResultExt;
 use workspace::Workspace;

@@ -33,7 +38,13 @@ pub struct EditFileTool;

 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct EditFileToolInput {
-    /// A user-friendly markdown description of what's being replaced. This will be shown in the UI.
+    /// A one-line, user-friendly markdown description of the edit. This will be
+    /// shown in the UI and also passed to another model to perform the edit.
+    ///
+    /// Be terse, but also descriptive in what you want to achieve with this
+    /// edit. Avoid generic instructions.
+    ///
+    /// NEVER mention the file path in this description.
    ///
    /// <example>Fix API endpoint URLs</example>
    /// <example>Update copyright year in `page_footer`</example>
@@ -42,7 +53,7 @@ pub struct EditFileToolInput {
    /// so that we can display it immediately.
    pub display_description: String,

-    /// The full path of the file to modify in the project.
+    /// The full path of the file to create or modify in the project.
    ///
    /// WARNING: When specifying which file path need changing, you MUST
    /// start each path with one of the project's root directories.
@@ -63,11 +74,19 @@ pub struct EditFileToolInput {
    /// </example>
    pub path: PathBuf,

-    /// The text to replace.
-    pub old_string: String,
+    /// If true, this tool will recreate the file from scratch.
+    /// If false, this tool will produce granular edits to an existing file.
+    ///
+    /// When a file already exists or you just created it, always prefer editing
+    /// it as opposed to recreating it from scratch.
+    pub create_or_overwrite: bool,
+}

-    /// The text to replace it with.
-    pub new_string: String,
+#[derive(Debug, Serialize, Deserialize, JsonSchema)]
+pub struct EditFileToolOutput {
+    pub original_path: PathBuf,
+    pub new_text: String,
+    pub old_text: String,
 }

 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
@@ -76,10 +95,6 @@ struct PartialInput {
    path: String,
    #[serde(default)]
    display_description: String,
-    #[serde(default)]
-    old_string: String,
-    #[serde(default)]
-    new_string: String,
 }

 const DEFAULT_UI_TEXT: &str = "Editing file";
@@ -131,9 +146,10 @@ impl Tool for EditFileTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        action_log: Entity<ActionLog>,
+        model: Arc<dyn LanguageModel>,
        window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -142,6 +158,14 @@ impl Tool for EditFileTool {
            Err(err) => return Task::ready(Err(anyhow!(err))).into(),
        };

+        let Some(project_path) = project.read(cx).find_project_path(&input.path, cx) else {
+            return Task::ready(Err(anyhow!(
+                "Path {} not found in project",
+                input.path.display()
+            )))
+            .into();
+        };
+
        let card = window.and_then(|window| {
            window
                .update(cx, |_, window, cx| {
@@ -154,11 +178,7 @@ impl Tool for EditFileTool {

        let card_clone = card.clone();
        let task = cx.spawn(async move |cx: &mut AsyncApp| {
-            let project_path = project.read_with(cx, |project, cx| {
-                project
-                    .find_project_path(&input.path, cx)
-                    .context("Path not found in project")
-            })??;
+            let edit_agent = EditAgent::new(model, project.clone(), action_log, Templates::new());

            let buffer = project
                .update(cx, |project, cx| {
@@ -166,118 +186,88 @@ impl Tool for EditFileTool {
                })?
                .await?;

-            // Set the agent's location to the top of the file
-            project
-                .update(cx, |project, cx| {
-                    project.set_agent_location(
-                        Some(AgentLocation {
-                            buffer: buffer.downgrade(),
-                            position: language::Anchor::MIN,
-                        }),
-                        cx,
-                    );
-                })
-                .ok();
-
-            let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
-
-            if input.old_string.is_empty() {
-                return Err(anyhow!(
-                    "`old_string` can't be empty, use another tool if you want to create a file."
-                ));
+            let exists = buffer.read_with(cx, |buffer, _| {
+                buffer
+                    .file()
+                    .as_ref()
+                    .map_or(false, |file| file.disk_state().exists())
+            })?;
+            if !input.create_or_overwrite && !exists {
+                return Err(anyhow!("{} not found", input.path.display()));
            }

-            if input.old_string == input.new_string {
-                return Err(anyhow!(
-                    "The `old_string` and `new_string` are identical, so no changes would be made."
-                ));
-            }
-
-            let result = cx
-                .background_spawn(async move {
-                    // Try to match exactly
-                    let diff = replace_exact(&input.old_string, &input.new_string, &snapshot)
-                        .await
-                        // If that fails, try being flexible about indentation
-                        .or_else(|| {
-                            replace_with_flexible_indent(
-                                &input.old_string,
-                                &input.new_string,
-                                &snapshot,
-                            )
-                        })?;
-
-                    if diff.edits.is_empty() {
-                        return None;
-                    }
-
-                    let old_text = snapshot.text();
-
-                    Some((old_text, diff))
+            let old_snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
+            let old_text = cx
+                .background_spawn({
+                    let old_snapshot = old_snapshot.clone();
+                    async move { old_snapshot.text() }
                })
                .await;

-            let Some((old_text, diff)) = result else {
-                let err = buffer.read_with(cx, |buffer, _cx| {
-                    let file_exists = buffer
-                        .file()
-                        .map_or(false, |file| file.disk_state().exists());
-
-                    if !file_exists {
-                        anyhow!("{} does not exist", input.path.display())
-                    } else if buffer.is_empty() {
-                        anyhow!(
-                            "{} is empty, so the provided `old_string` wasn't found.",
-                            input.path.display()
-                        )
-                    } else {
-                        anyhow!("Failed to match the provided `old_string`")
-                    }
-                })?;
-
-                return Err(err);
+            let (output, mut events) = if input.create_or_overwrite {
+                edit_agent.overwrite(
+                    buffer.clone(),
+                    input.display_description.clone(),
+                    &request,
+                    cx,
+                )
+            } else {
+                edit_agent.edit(
+                    buffer.clone(),
+                    input.display_description.clone(),
+                    &request,
+                    cx,
+                )
            };

-            let snapshot = cx.update(|cx| {
-                action_log.update(cx, |log, cx| log.buffer_read(buffer.clone(), cx));
-                let base_version = diff.base_version.clone();
-                let snapshot = buffer.update(cx, |buffer, cx| {
-                    buffer.finalize_last_transaction();
-                    buffer.apply_diff(diff, cx);
-                    buffer.finalize_last_transaction();
-                    buffer.snapshot()
-                });
-                action_log.update(cx, |log, cx| log.buffer_edited(buffer.clone(), cx));
-
-                // Set the agent's location to the position of the first edit
-                if let Some(first_edit) = snapshot.edits_since::<usize>(&base_version).next() {
-                    let position = snapshot.anchor_before(first_edit.new.start);
-                    project.update(cx, |project, cx| {
-                        project.set_agent_location(
-                            Some(AgentLocation {
-                                buffer: buffer.downgrade(),
-                                position,
-                            }),
-                            cx,
-                        );
-                    })
+            let mut hallucinated_old_text = false;
+            while let Some(event) = events.next().await {
+                match event {
+                    EditAgentOutputEvent::Edited => {
+                        if let Some(card) = card_clone.as_ref() {
+                            let new_snapshot =
+                                buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
+                            let new_text = cx
+                                .background_spawn({
+                                    let new_snapshot = new_snapshot.clone();
+                                    async move { new_snapshot.text() }
+                                })
+                                .await;
+                            card.update(cx, |card, cx| {
+                                card.set_diff(
+                                    project_path.path.clone(),
+                                    old_text.clone(),
+                                    new_text,
+                                    cx,
+                                );
+                            })
+                            .log_err();
+                        }
+                    }
+                    EditAgentOutputEvent::OldTextNotFound(_) => hallucinated_old_text = true,
                }
-
-                snapshot
-            })?;
+            }
+            output.await?;

            project
-                .update(cx, |project, cx| project.save_buffer(buffer, cx))?
+                .update(cx, |project, cx| project.save_buffer(buffer.clone(), cx))?
                .await?;

-            let new_text = snapshot.text();
-            let diff_str = cx
-                .background_spawn({
-                    let old_text = old_text.clone();
-                    let new_text = new_text.clone();
-                    async move { language::unified_diff(&old_text, &new_text) }
-                })
-                .await;
+            let new_snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
+            let new_text = cx.background_spawn({
+                let new_snapshot = new_snapshot.clone();
+                async move { new_snapshot.text() }
+            });
+            let diff = cx.background_spawn(async move {
+                language::unified_diff(&old_snapshot.text(), &new_snapshot.text())
+            });
+            let (new_text, diff) = futures::join!(new_text, diff);
+
+            let output = EditFileToolOutput {
+                original_path: project_path.path.to_path_buf(),
+                new_text: new_text.clone(),
+                old_text: old_text.clone(),
+            };

            if let Some(card) = card_clone {
                card.update(cx, |card, cx| {
@@ -286,11 +276,23 @@ impl Tool for EditFileTool {
                .log_err();
            }

-            Ok(format!(
-                "Edited {}:\n\n```diff\n{}\n```",
-                input.path.display(),
-                diff_str
-            ))
+            let input_path = input.path.display();
+            if diff.is_empty() {
+                if hallucinated_old_text {
+                    Err(anyhow!(formatdoc! {"
+                        Some edits were produced but none of them could be applied.
+                        Read the relevant sections of {input_path} again so that
+                        I can perform the requested edits.
+                    "}))
+                } else {
+                    Ok("No edits were made.".to_string().into())
+                }
+            } else {
+                Ok(ToolResultOutput {
+                    content: format!("Edited {}:\n\n```diff\n{}\n```", input_path, diff),
+                    output: serde_json::to_value(output).ok(),
+                })
+            }
        });

        ToolResult {
@@ -298,6 +300,32 @@ impl Tool for EditFileTool {
            card: card.map(AnyToolCard::from),
        }
    }
+
+    fn deserialize_card(
+        self: Arc<Self>,
+        output: serde_json::Value,
+        project: Entity<Project>,
+        window: &mut Window,
+        cx: &mut App,
+    ) -> Option<AnyToolCard> {
+        let output = match serde_json::from_value::<EditFileToolOutput>(output) {
+            Ok(output) => output,
+            Err(_) => return None,
+        };
+
+        let card = cx.new(|cx| {
+            let mut card = EditFileToolCard::new(output.original_path.clone(), project, window, cx);
+            card.set_diff(
+                output.original_path.into(),
+                output.old_text,
+                output.new_text,
+                cx,
+            );
+            card
+        });
+
+        Some(card.into())
+    }
 }

 pub struct EditFileToolCard {
@@ -331,9 +359,9 @@ impl EditFileToolCard {
            editor.set_show_gutter(false, cx);
            editor.disable_inline_diagnostics();
            editor.disable_expand_excerpt_buttons(cx);
+            editor.disable_scrollbars_and_minimap(cx);
            editor.set_soft_wrap_mode(SoftWrap::None, cx);
            editor.scroll_manager.set_forbid_vertical_scroll(true);
-            editor.set_show_scrollbars(false, cx);
            editor.set_show_indent_guides(false, cx);
            editor.set_read_only(true);
            editor.set_show_breakpoints(false, cx);
@@ -540,36 +568,21 @@ impl ToolCard for EditFileToolCard {
            });

        let (editor, editor_line_height) = self.editor.update(cx, |editor, cx| {
-            let ui_font_size = ThemeSettings::get_global(cx).ui_font_size(cx);
            let line_height = editor
                .style()
                .map(|style| style.text.line_height_in_pixels(window.rem_size()))
                .unwrap_or_default();

-            let settings = ThemeSettings::get_global(cx);
-            let element = EditorElement::new(
-                &cx.entity(),
-                EditorStyle {
-                    background: cx.theme().colors().editor_background,
-                    horizontal_padding: rems(0.25).to_pixels(window.rem_size()),
-                    local_player: cx.theme().players().local(),
-                    text: TextStyle {
-                        color: cx.theme().colors().editor_foreground,
-                        font_family: settings.buffer_font.family.clone(),
-                        font_features: settings.buffer_font.features.clone(),
-                        font_fallbacks: settings.buffer_font.fallbacks.clone(),
-                        font_size: ui_font_size.into(),
-                        font_weight: settings.buffer_font.weight,
-                        line_height: relative(settings.buffer_line_height.value()),
-                        ..Default::default()
-                    },
-                    scrollbar_width: EditorElement::SCROLLBAR_WIDTH,
-                    syntax: cx.theme().syntax().clone(),
-                    status: cx.theme().status().clone(),
-                    ..Default::default()
-                },
-            );
-
+            editor.set_text_style_refinement(TextStyleRefinement {
+                font_size: Some(
+                    TextSize::Small
+                        .rems(cx)
+                        .to_pixels(ThemeSettings::get_global(cx).agent_font_size(cx))
+                        .into(),
+                ),
+                ..TextStyleRefinement::default()
+            });
+            let element = editor.render(window, cx);
            (element.into_any_element(), line_height)
        });

@@ -579,18 +592,18 @@ impl ToolCard for EditFileToolCard {
            (IconName::ChevronDown, "Expand Code Block")
        };

-        let gradient_overlay = div()
-            .absolute()
-            .bottom_0()
-            .left_0()
-            .w_full()
-            .h_2_5()
-            .rounded_b_lg()
-            .bg(gpui::linear_gradient(
-                0.,
-                gpui::linear_color_stop(cx.theme().colors().editor_background, 0.),
-                gpui::linear_color_stop(cx.theme().colors().editor_background.opacity(0.), 1.),
-            ));
+        let gradient_overlay =
+            div()
+                .absolute()
+                .bottom_0()
+                .left_0()
+                .w_full()
+                .h_2_5()
+                .bg(gpui::linear_gradient(
+                    0.,
+                    gpui::linear_color_stop(cx.theme().colors().editor_background, 0.),
+                    gpui::linear_color_stop(cx.theme().colors().editor_background.opacity(0.), 1.),
+                ));

        let border_color = cx.theme().colors().border.opacity(0.6);

@@ -608,8 +621,9 @@ impl ToolCard for EditFileToolCard {

            let mut container = v_flex()
                .p_3()
-                .gap_1p5()
+                .gap_1()
                .border_t_1()
+                .rounded_md()
                .border_color(border_color)
                .bg(cx.theme().colors().editor_background);

@@ -624,7 +638,7 @@ impl ToolCard for EditFileToolCard {
                    _ => div().w_1_2(),
                }
                .id("loading_div")
-                .h_2()
+                .h_1()
                .rounded_full()
                .bg(cx.theme().colors().element_active)
                .with_animation(
@@ -646,7 +660,7 @@ impl ToolCard for EditFileToolCard {
            .border_1()
            .when(failed, |card| card.border_dashed())
            .border_color(border_color)
-            .rounded_lg()
+            .rounded_md()
            .overflow_hidden()
            .child(codeblock_header)
            .when(failed && self.error_expanded, |card| {
@@ -700,8 +714,8 @@ impl ToolCard for EditFileToolCard {
                                |editor_container| editor_container.child(gradient_overlay),
                            ),
                    )
-                    .when(is_collapsible, |editor_container| {
-                        editor_container.child(
+                    .when(is_collapsible, |card| {
+                        card.child(
                            h_flex()
                                .id(("expand-button", self.editor_unique_id))
                                .flex_none()
@@ -709,6 +723,7 @@ impl ToolCard for EditFileToolCard {
                                .h_5()
                                .justify_center()
                                .border_t_1()
+                                .rounded_b_md()
                                .border_color(border_color)
                                .bg(cx.theme().colors().editor_background)
                                .hover(|style| {
@@ -806,7 +821,48 @@ async fn build_buffer_diff(
 #[cfg(test)]
 mod tests {
    use super::*;
+    use fs::FakeFs;
+    use gpui::TestAppContext;
+    use language_model::fake_provider::FakeLanguageModel;
    use serde_json::json;
+    use settings::SettingsStore;
+    use util::path;
+
+    #[gpui::test]
+    async fn test_edit_nonexistent_file(cx: &mut TestAppContext) {
+        init_test(cx);
+
+        let fs = FakeFs::new(cx.executor());
+        fs.insert_tree("/root", json!({})).await;
+        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
+        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let model = Arc::new(FakeLanguageModel::default());
+        let result = cx
+            .update(|cx| {
+                let input = serde_json::to_value(EditFileToolInput {
+                    display_description: "Some edit".into(),
+                    path: "root/nonexistent_file.txt".into(),
+                    create_or_overwrite: false,
+                })
+                .unwrap();
+                Arc::new(EditFileTool)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log,
+                        model,
+                        None,
+                        cx,
+                    )
+                    .output
+            })
+            .await;
+        assert_eq!(
+            result.unwrap_err().to_string(),
+            "root/nonexistent_file.txt not found"
+        );
+    }

    #[test]
    fn still_streaming_ui_text_with_path() {
@@ -874,4 +930,13 @@ mod tests {
            DEFAULT_UI_TEXT,
        );
    }
+
+    fn init_test(cx: &mut TestAppContext) {
+        cx.update(|cx| {
+            let settings_store = SettingsStore::test(cx);
+            cx.set_global(settings_store);
+            language::init(cx);
+            Project::init_settings(cx);
+        });
+    }
 }
--- a/crates/assistant_tools/src/edit_file_tool/description.md
+++ b/crates/assistant_tools/src/edit_file_tool/description.md
@@ -1,4 +1,4 @@
-This is a tool for editing files. For moving or renaming files, you should generally use the `terminal` tool with the 'mv' command instead. For larger edits, use the `create_file` tool to overwrite files.
+This is a tool for creating a new file or editing an existing file. For moving or renaming files, you should generally use the `terminal` tool with the 'mv' command instead.

 Before using this tool:

@@ -6,40 +6,3 @@ Before using this tool:

 2. Verify the directory path is correct (only applicable when creating new files):
   - Use the `list_directory` tool to verify the parent directory exists and is the correct location
-
-To make a file edit, provide the following:
-1. path: The full path to the file you wish to modify in the project. This path must include the root directory in the project.
-2. old_string: The text to replace (must be unique within the file, and must match the file contents exactly, including all whitespace and indentation)
-3. new_string: The edited text, which will replace the old_string in the file.
-
-The tool will replace ONE occurrence of old_string with new_string in the specified file.
-
-CRITICAL REQUIREMENTS FOR USING THIS TOOL:
-
-1. UNIQUENESS: The old_string MUST uniquely identify the specific instance you want to change. This means:
-   - Include AT LEAST 3-5 lines of context BEFORE the change point
-   - Include AT LEAST 3-5 lines of context AFTER the change point
-   - Include all whitespace, indentation, and surrounding code exactly as it appears in the file
-
-2. SINGLE INSTANCE: This tool can only change ONE instance at a time. If you need to change multiple instances:
-   - Make separate calls to this tool for each instance
-   - Each call must uniquely identify its specific instance using extensive context
-
-3. VERIFICATION: Before using this tool:
-   - Check how many instances of the target text exist in the file
-   - If multiple instances exist, gather enough context to uniquely identify each one
-   - Plan separate tool calls for each instance
-
-WARNING: If you do not follow these requirements:
-   - The tool will fail if old_string matches multiple locations
-   - The tool will fail if old_string doesn't match exactly (including whitespace)
-   - You may change the wrong instance if you don't include enough context
-
-When making edits:
-   - Ensure the edit results in idiomatic, correct code
-   - Do not leave the code in a broken state
-   - Always use fully-qualified project paths (starting with the name of one of the project's root directories)
-
-If you want to create a new file, use the `create_file` tool instead of this tool. Don't pass an empty `old_string`.
-
-Remember: when making multiple file edits in a row to the same file, you should prefer to send all edits in a single message with multiple calls to this tool, rather than multiple messages with a single call each.
--- a/crates/assistant_tools/src/fetch_tool.rs
+++ b/crates/assistant_tools/src/fetch_tool.rs
@@ -9,7 +9,7 @@ use futures::AsyncReadExt as _;
 use gpui::{AnyWindowHandle, App, AppContext as _, Entity, Task};
 use html_to_markdown::{TagHandler, convert_html_to_markdown, markdown};
 use http_client::{AsyncBody, HttpClientWithUrl};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -142,9 +142,10 @@ impl Tool for FetchTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        _project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -166,7 +167,7 @@ impl Tool for FetchTool {
                    bail!("no textual content found");
                }

-                Ok(text)
+                Ok(text.into())
            })
            .into()
    }
--- a/crates/assistant_tools/src/find_path_tool.rs
+++ b/crates/assistant_tools/src/find_path_tool.rs
@@ -7,7 +7,7 @@ use gpui::{
    AnyWindowHandle, App, AppContext, Context, Entity, IntoElement, Task, WeakEntity, Window,
 };
 use language;
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -73,9 +73,10 @@ impl Tool for FindPathTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -98,7 +99,7 @@ impl Tool for FindPathTool {
            sender.send(paginated_matches.to_vec()).log_err();

            if matches.is_empty() {
-                Ok("No matches found".to_string())
+                Ok("No matches found".to_string().into())
            } else {
                let mut message = format!("Found {} total matches.", matches.len());
                if matches.len() > RESULTS_PER_PAGE {
@@ -113,7 +114,7 @@ impl Tool for FindPathTool {
                for mat in matches.into_iter().skip(offset).take(RESULTS_PER_PAGE) {
                    write!(&mut message, "\n{}", mat.display()).unwrap();
                }
-                Ok(message)
+                Ok(message.into())
            }
        });

--- a/crates/assistant_tools/src/grep_tool.rs
+++ b/crates/assistant_tools/src/grep_tool.rs
@@ -4,7 +4,7 @@ use assistant_tool::{ActionLog, Tool, ToolResult};
 use futures::StreamExt;
 use gpui::{AnyWindowHandle, App, Entity, Task};
 use language::{OffsetRangeExt, ParseStatus, Point};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::{
    Project,
    search::{SearchQuery, SearchResult},
@@ -96,9 +96,10 @@ impl Tool for GrepTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -260,16 +261,16 @@ impl Tool for GrepTool {
            }

            if matches_found == 0 {
-                Ok("No matches found".to_string())
+                Ok("No matches found".to_string().into())
            } else if has_more_matches {
                Ok(format!(
                    "Showing matches {}-{} (there were more matches found; use offset: {} to see next page):\n{output}",
                    input.offset + 1,
                    input.offset + matches_found,
                    input.offset + RESULTS_PER_PAGE,
-                ))
+                ).into())
            } else {
-                Ok(format!("Found {matches_found} matches:\n{output}"))
+                Ok(format!("Found {matches_found} matches:\n{output}").into())
            }
        }).into()
    }
@@ -281,6 +282,7 @@ mod tests {
    use assistant_tool::Tool;
    use gpui::{AppContext, TestAppContext};
    use language::{Language, LanguageConfig, LanguageMatcher};
+    use language_model::fake_provider::FakeLanguageModel;
    use project::{FakeFs, Project};
    use settings::SettingsStore;
    use unindent::Unindent;
@@ -743,14 +745,16 @@ mod tests {
    ) -> String {
        let tool = Arc::new(GrepTool);
        let action_log = cx.new(|_cx| ActionLog::new(project.clone()));
-        let task = cx.update(|cx| tool.run(input, &[], project, action_log, None, cx));
+        let model = Arc::new(FakeLanguageModel::default());
+        let task =
+            cx.update(|cx| tool.run(input, Arc::default(), project, action_log, model, None, cx));

        match task.output.await {
            Ok(result) => {
                if cfg!(windows) {
-                    result.replace("root\\", "root/")
+                    result.content.replace("root\\", "root/")
                } else {
-                    result
+                    result.content
                }
            }
            Err(e) => panic!("Failed to run grep tool: {}", e),
--- a/crates/assistant_tools/src/list_directory_tool.rs
+++ b/crates/assistant_tools/src/list_directory_tool.rs
@@ -2,7 +2,7 @@ use crate::schema::json_schema_for;
 use anyhow::{Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolResult};
 use gpui::{AnyWindowHandle, App, Entity, Task};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -73,9 +73,10 @@ impl Tool for ListDirectoryTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -102,7 +103,7 @@ impl Tool for ListDirectoryTool {
                .collect::<Vec<_>>()
                .join("\n");

-            return Task::ready(Ok(output)).into();
+            return Task::ready(Ok(output.into())).into();
        }

        let Some(project_path) = project.read(cx).find_project_path(&input.path, cx) else {
@@ -134,8 +135,8 @@ impl Tool for ListDirectoryTool {
            .unwrap();
        }
        if output.is_empty() {
-            return Task::ready(Ok(format!("{} is empty.", input.path))).into();
+            return Task::ready(Ok(format!("{} is empty.", input.path).into())).into();
        }
-        Task::ready(Ok(output)).into()
+        Task::ready(Ok(output.into())).into()
    }
 }
--- a/crates/assistant_tools/src/move_path_tool.rs
+++ b/crates/assistant_tools/src/move_path_tool.rs
@@ -2,7 +2,7 @@ use crate::schema::json_schema_for;
 use anyhow::{Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolResult};
 use gpui::{AnyWindowHandle, App, AppContext, Entity, Task};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -86,9 +86,10 @@ impl Tool for MovePathTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -117,10 +118,9 @@ impl Tool for MovePathTool {

        cx.background_spawn(async move {
            match rename_task.await {
-                Ok(_) => Ok(format!(
-                    "Moved {} to {}",
-                    input.source_path, input.destination_path
-                )),
+                Ok(_) => {
+                    Ok(format!("Moved {} to {}", input.source_path, input.destination_path).into())
+                }
                Err(err) => Err(anyhow!(
                    "Failed to move {} to {}: {}",
                    input.source_path,
--- a/crates/assistant_tools/src/now_tool.rs
+++ b/crates/assistant_tools/src/now_tool.rs
@@ -5,7 +5,7 @@ use anyhow::{Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolResult};
 use chrono::{Local, Utc};
 use gpui::{AnyWindowHandle, App, Entity, Task};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -56,9 +56,10 @@ impl Tool for NowTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        _project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        _cx: &mut App,
    ) -> ToolResult {
@@ -73,6 +74,6 @@ impl Tool for NowTool {
        };
        let text = format!("The current datetime is {now}.");

-        Task::ready(Ok(text)).into()
+        Task::ready(Ok(text.into())).into()
    }
 }
--- a/crates/assistant_tools/src/open_tool.rs
+++ b/crates/assistant_tools/src/open_tool.rs
@@ -2,7 +2,7 @@ use crate::schema::json_schema_for;
 use anyhow::{Context as _, Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolResult};
 use gpui::{AnyWindowHandle, App, AppContext, Entity, Task};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -49,9 +49,10 @@ impl Tool for OpenTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        _action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -70,7 +71,7 @@ impl Tool for OpenTool {
            }
            .context("Failed to open URL or file path")?;

-            Ok(format!("Successfully opened {}", input.path_or_url))
+            Ok(format!("Successfully opened {}", input.path_or_url).into())
        })
        .into()
    }
--- a/crates/assistant_tools/src/read_file_tool.rs
+++ b/crates/assistant_tools/src/read_file_tool.rs
@@ -7,7 +7,7 @@ use gpui::{AnyWindowHandle, App, Entity, Task};
 use indoc::formatdoc;
 use itertools::Itertools;
 use language::{Anchor, Point};
-use language_model::{LanguageModelRequestMessage, LanguageModelToolSchemaFormat};
+use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
 use project::{AgentLocation, Project};
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -83,9 +83,10 @@ impl Tool for ReadFileTool {
    fn run(
        self: Arc<Self>,
        input: serde_json::Value,
-        _messages: &[LanguageModelRequestMessage],
+        _request: Arc<LanguageModelRequest>,
        project: Entity<Project>,
        action_log: Entity<ActionLog>,
+        _model: Arc<dyn LanguageModel>,
        _window: Option<AnyWindowHandle>,
        cx: &mut App,
    ) -> ToolResult {
@@ -97,27 +98,22 @@ impl Tool for ReadFileTool {
        let Some(project_path) = project.read(cx).find_project_path(&input.path, cx) else {
            return Task::ready(Err(anyhow!("Path {} not found in project", &input.path))).into();
        };
-        let Some(worktree) = project
-            .read(cx)
-            .worktree_for_id(project_path.worktree_id, cx)
-        else {
-            return Task::ready(Err(anyhow!("Worktree not found for project path"))).into();
-        };
-        let exists = worktree.update(cx, |worktree, cx| {
-            worktree.file_exists(&project_path.path, cx)
-        });

        let file_path = input.path.clone();
        cx.spawn(async move |cx| {
-            if !exists.await? {
-                return Err(anyhow!("{} not found", file_path));
-            }
-
            let buffer = cx
                .update(|cx| {
                    project.update(cx, |project, cx| project.open_buffer(project_path, cx))
                })?
                .await?;
+            if buffer.read_with(cx, |buffer, _| {
+                buffer
+                    .file()
+                    .as_ref()
+                    .map_or(true, |file| !file.disk_state().exists())
+            })? {
+                return Err(anyhow!("{} not found", file_path));
+            }

            project.update(cx, |project, cx| {
                project.set_agent_location(
@@ -145,9 +141,13 @@ impl Tool for ReadFileTool {
                    let lines = text.split('\n').skip(start_row as usize);
                    if let Some(end) = input.end_line {
                        let count = end.saturating_sub(start).saturating_add(1); // Ensure at least 1 line
-                        Itertools::intersperse(lines.take(count as usize), "\n").collect()
+                        Itertools::intersperse(lines.take(count as usize), "\n")
+                            .collect::<String>()
+                            .into()
                    } else {
-                        Itertools::intersperse(lines, "\n").collect()
+                        Itertools::intersperse(lines, "\n")
+                            .collect::<String>()
+                            .into()
                    }
                })?;

@@ -180,19 +180,24 @@ impl Tool for ReadFileTool {
                        log.buffer_read(buffer, cx);
                    })?;

-                    Ok(result)
+                    Ok(result.into())
                } else {
                    // File is too big, so return the outline
                    // and a suggestion to read again with line numbers.
-                    let outline = outline::file_outline(project, file_path, action_log, None, cx).await?;
+                    let outline =
+                        outline::file_outline(project, file_path, action_log, None, cx).await?;
                    Ok(formatdoc! {"
-                        This file was too big to read all at once. Here is an outline of its symbols:
+                        This file was too big to read all at once.
+
+                        Here is an outline of its symbols:

                        {outline}

-                        Using the line numbers in this outline, you can call this tool again while specifying
-                        the start_line and end_line fields to see the implementations of symbols in the outline."
-                    })
+                        Using the line numbers in this outline, you can call this tool again
+                        while specifying the start_line and end_line fields to see the
+                        implementations of symbols in the outline."
+                    }
+                    .into())
                }
            }
        })
@@ -205,6 +210,7 @@ mod test {
    use super::*;
    use gpui::{AppContext, TestAppContext};
    use language::{Language, LanguageConfig, LanguageMatcher};
+    use language_model::fake_provider::FakeLanguageModel;
    use project::{FakeFs, Project};
    use serde_json::json;
    use settings::SettingsStore;
@@ -218,13 +224,22 @@ mod test {
        fs.insert_tree("/root", json!({})).await;
        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let model = Arc::new(FakeLanguageModel::default());
        let result = cx
            .update(|cx| {
                let input = json!({
                    "path": "root/nonexistent_file.txt"
                });
                Arc::new(ReadFileTool)
-                    .run(input, &[], project.clone(), action_log, None, cx)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log,
+                        model,
+                        None,
+                        cx,
+                    )
                    .output
            })
            .await;
@@ -248,17 +263,26 @@ mod test {
        .await;
        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let model = Arc::new(FakeLanguageModel::default());
        let result = cx
            .update(|cx| {
                let input = json!({
                    "path": "root/small_file.txt"
                });
                Arc::new(ReadFileTool)
-                    .run(input, &[], project.clone(), action_log, None, cx)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log,
+                        model,
+                        None,
+                        cx,
+                    )
                    .output
            })
            .await;
-        assert_eq!(result.unwrap(), "This is a small file content");
+        assert_eq!(result.unwrap().content, "This is a small file content");
    }

    #[gpui::test]
@@ -277,6 +301,7 @@ mod test {
        let language_registry = project.read_with(cx, |project, _| project.languages().clone());
        language_registry.add(Arc::new(rust_lang()));
        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let model = Arc::new(FakeLanguageModel::default());

        let result = cx
            .update(|cx| {
@@ -284,13 +309,21 @@ mod test {
                    "path": "root/large_file.rs"
                });
                Arc::new(ReadFileTool)
-                    .run(input, &[], project.clone(), action_log.clone(), None, cx)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log.clone(),
+                        model.clone(),
+                        None,
+                        cx,
+                    )
                    .output
            })
            .await;
        let content = result.unwrap();
        assert_eq!(
-            content.lines().skip(2).take(6).collect::<Vec<_>>(),
+            content.lines().skip(4).take(6).collect::<Vec<_>>(),
            vec![
                "struct Test0 [L1-4]",
                " a [L2]",
@@ -308,7 +341,15 @@ mod test {
                    "offset": 1
                });
                Arc::new(ReadFileTool)
-                    .run(input, &[], project.clone(), action_log, None, cx)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log,
+                        model,
+                        None,
+                        cx,
+                    )
                    .output
            })
            .await;
@@ -325,7 +366,7 @@ mod test {
        pretty_assertions::assert_eq!(
            content
                .lines()
-                .skip(2)
+                .skip(4)
                .take(expected_content.len())
                .collect::<Vec<_>>(),
            expected_content
@@ -346,6 +387,7 @@ mod test {
        .await;
        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let model = Arc::new(FakeLanguageModel::default());
        let result = cx
            .update(|cx| {
                let input = json!({
@@ -354,11 +396,19 @@ mod test {
                    "end_line": 4
                });
                Arc::new(ReadFileTool)
-                    .run(input, &[], project.clone(), action_log, None, cx)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log,
+                        model,
+                        None,
+                        cx,
+                    )
                    .output
            })
            .await;
-        assert_eq!(result.unwrap(), "Line 2\nLine 3\nLine 4");
+        assert_eq!(result.unwrap().content, "Line 2\nLine 3\nLine 4");
    }

    #[gpui::test]
@@ -375,6 +425,7 @@ mod test {
        .await;
        let project = Project::test(fs.clone(), [path!("/root").as_ref()], cx).await;
        let action_log = cx.new(|_| ActionLog::new(project.clone()));
+        let model = Arc::new(FakeLanguageModel::default());

        // start_line of 0 should be treated as 1
        let result = cx
@@ -385,11 +436,19 @@ mod test {
                    "end_line": 2
                });
                Arc::new(ReadFileTool)
-                    .run(input, &[], project.clone(), action_log.clone(), None, cx)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log.clone(),
+                        model.clone(),
+                        None,
+                        cx,
+                    )
                    .output
            })
            .await;
-        assert_eq!(result.unwrap(), "Line 1\nLine 2");
+        assert_eq!(result.unwrap().content, "Line 1\nLine 2");

        // end_line of 0 should result in at least 1 line
        let result = cx
@@ -400,11 +459,19 @@ mod test {
                    "end_line": 0
                });
                Arc::new(ReadFileTool)
-                    .run(input, &[], project.clone(), action_log.clone(), None, cx)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log.clone(),
+                        model.clone(),
+                        None,
+                        cx,
+                    )
                    .output
            })
            .await;
-        assert_eq!(result.unwrap(), "Line 1");
+        assert_eq!(result.unwrap().content, "Line 1");

        // when start_line > end_line, should still return at least 1 line
        let result = cx
@@ -415,11 +482,19 @@ mod test {
                    "end_line": 2
                });
                Arc::new(ReadFileTool)
-                    .run(input, &[], project.clone(), action_log, None, cx)
+                    .run(
+                        input,
+                        Arc::default(),
+                        project.clone(),
+                        action_log,
+                        model,
+                        None,
+                        cx,
+                    )
                    .output
            })
            .await;
-        assert_eq!(result.unwrap(), "Line 3");
+        assert_eq!(result.unwrap().content, "Line 3");
    }

    fn init_test(cx: &mut TestAppContext) {
--- a/crates/assistant_tools/src/replace.rs
+++ b/crates/assistant_tools/src/replace.rs
@@ -1,872 +0,0 @@
-use language::{BufferSnapshot, Diff, Point, ToOffset};
-use project::search::SearchQuery;
-use std::iter;
-use util::{ResultExt as _, paths::PathMatcher};
-
-/// Performs an exact string replacement in a buffer, requiring precise character-for-character matching.
-/// Uses the search functionality to locate the first occurrence of the exact string.
-/// Returns None if no exact match is found in the buffer.
-pub async fn replace_exact(old: &str, new: &str, snapshot: &BufferSnapshot) -> Option<Diff> {
-    let query = SearchQuery::text(
-        old,
-        false,
-        true,
-        true,
-        PathMatcher::new(iter::empty::<&str>()).ok()?,
-        PathMatcher::new(iter::empty::<&str>()).ok()?,
-        false,
-        None,
-    )
-    .log_err()?;
-
-    let matches = query.search(&snapshot, None).await;
-
-    if matches.is_empty() {
-        return None;
-    }
-
-    let edit_range = matches[0].clone();
-    let diff = language::text_diff(&old, &new);
-
-    let edits = diff
-        .into_iter()
-        .map(|(old_range, text)| {
-            let start = edit_range.start + old_range.start;
-            let end = edit_range.start + old_range.end;
-            (start..end, text)
-        })
-        .collect::<Vec<_>>();
-
-    let diff = language::Diff {
-        base_version: snapshot.version().clone(),
-        line_ending: snapshot.line_ending(),
-        edits,
-    };
-
-    Some(diff)
-}
-
-/// Performs a replacement that's indentation-aware - matches text content ignoring leading whitespace differences.
-/// When replacing, preserves the indentation level found in the buffer at each matching line.
-/// Returns None if no match found or if indentation is offset inconsistently across matched lines.
-pub fn replace_with_flexible_indent(old: &str, new: &str, buffer: &BufferSnapshot) -> Option<Diff> {
-    let (old_lines, old_min_indent) = lines_with_min_indent(old);
-    let (new_lines, new_min_indent) = lines_with_min_indent(new);
-    let min_indent = old_min_indent.min(new_min_indent);
-
-    let old_lines = drop_lines_prefix(&old_lines, min_indent);
-    let new_lines = drop_lines_prefix(&new_lines, min_indent);
-
-    let max_row = buffer.max_point().row;
-
-    'windows: for start_row in 0..max_row + 1 {
-        let end_row = start_row + old_lines.len().saturating_sub(1) as u32;
-
-        if end_row > max_row {
-            // The buffer ends before fully matching the pattern
-            return None;
-        }
-
-        let start_point = Point::new(start_row, 0);
-        let end_point = Point::new(end_row, buffer.line_len(end_row));
-        let range = start_point.to_offset(buffer)..end_point.to_offset(buffer);
-
-        let window_text = buffer.text_for_range(range.clone());
-        let mut window_lines = window_text.lines();
-        let mut old_lines_iter = old_lines.iter();
-
-        let mut common_mismatch = None;
-
-        #[derive(Eq, PartialEq)]
-        enum Mismatch {
-            OverIndented(String),
-            UnderIndented(String),
-        }
-
-        while let (Some(window_line), Some(old_line)) = (window_lines.next(), old_lines_iter.next())
-        {
-            let line_trimmed = window_line.trim_start();
-
-            if line_trimmed != old_line.trim_start() {
-                continue 'windows;
-            }
-
-            if line_trimmed.is_empty() {
-                continue;
-            }
-
-            let line_mismatch = if window_line.len() > old_line.len() {
-                let prefix = window_line[..window_line.len() - old_line.len()].to_string();
-                Mismatch::UnderIndented(prefix)
-            } else {
-                let prefix = old_line[..old_line.len() - window_line.len()].to_string();
-                Mismatch::OverIndented(prefix)
-            };
-
-            match &common_mismatch {
-                Some(common_mismatch) if common_mismatch != &line_mismatch => {
-                    continue 'windows;
-                }
-                Some(_) => (),
-                None => common_mismatch = Some(line_mismatch),
-            }
-        }
-
-        if let Some(common_mismatch) = &common_mismatch {
-            let line_ending = buffer.line_ending();
-            let replacement = new_lines
-                .iter()
-                .map(|new_line| {
-                    if new_line.trim().is_empty() {
-                        new_line.to_string()
-                    } else {
-                        match common_mismatch {
-                            Mismatch::UnderIndented(prefix) => prefix.to_string() + new_line,
-                            Mismatch::OverIndented(prefix) => new_line
-                                .strip_prefix(prefix)
-                                .unwrap_or(new_line)
-                                .to_string(),
-                        }
-                    }
-                })
-                .collect::<Vec<_>>()
-                .join(line_ending.as_str());
-
-            let diff = Diff {
-                base_version: buffer.version().clone(),
-                line_ending,
-                edits: vec![(range, replacement.into())],
-            };
-
-            return Some(diff);
-        }
-    }
-
-    None
-}
-
-fn drop_lines_prefix<'a>(lines: &'a [&str], prefix_len: usize) -> Vec<&'a str> {
-    lines
-        .iter()
-        .map(|line| line.get(prefix_len..).unwrap_or(""))
-        .collect()
-}
-
-fn lines_with_min_indent(input: &str) -> (Vec<&str>, usize) {
-    let mut lines = Vec::new();
-    let mut min_indent: Option<usize> = None;
-
-    for line in input.lines() {
-        lines.push(line);
-        if !line.trim().is_empty() {
-            let indent = line.len() - line.trim_start().len();
-            min_indent = Some(min_indent.map_or(indent, |m| m.min(indent)));
-        }
-    }
-
-    (lines, min_indent.unwrap_or(0))
-}
-
-#[cfg(test)]
-mod replace_exact_tests {
-    use super::*;
-    use gpui::TestAppContext;
-    use gpui::prelude::*;
-
-    #[gpui::test]
-    async fn basic(cx: &mut TestAppContext) {
-        let result = test_replace_exact(cx, "let x = 41;", "let x = 41;", "let x = 42;").await;
-        assert_eq!(result, Some("let x = 42;".to_string()));
-    }
-
-    #[gpui::test]
-    async fn no_match(cx: &mut TestAppContext) {
-        let result = test_replace_exact(cx, "let x = 41;", "let y = 42;", "let y = 43;").await;
-        assert_eq!(result, None);
-    }
-
-    #[gpui::test]
-    async fn multi_line(cx: &mut TestAppContext) {
-        let whole = "fn example() {\n    let x = 41;\n    println!(\"x = {}\", x);\n}";
-        let old_text = "    let x = 41;\n    println!(\"x = {}\", x);";
-        let new_text = "    let x = 42;\n    println!(\"x = {}\", x);";
-        let result = test_replace_exact(cx, whole, old_text, new_text).await;
-        assert_eq!(
-            result,
-            Some("fn example() {\n    let x = 42;\n    println!(\"x = {}\", x);\n}".to_string())
-        );
-    }
-
-    #[gpui::test]
-    async fn multiple_occurrences(cx: &mut TestAppContext) {
-        let whole = "let x = 41;\nlet y = 41;\nlet z = 41;";
-        let result = test_replace_exact(cx, whole, "let x = 41;", "let x = 42;").await;
-        assert_eq!(
-            result,
-            Some("let x = 42;\nlet y = 41;\nlet z = 41;".to_string())
-        );
-    }
-
-    #[gpui::test]
-    async fn empty_buffer(cx: &mut TestAppContext) {
-        let result = test_replace_exact(cx, "", "let x = 41;", "let x = 42;").await;
-        assert_eq!(result, None);
-    }
-
-    #[gpui::test]
-    async fn partial_match(cx: &mut TestAppContext) {
-        let whole = "let x = 41; let y = 42;";
-        let result = test_replace_exact(cx, whole, "let x = 41", "let x = 42").await;
-        assert_eq!(result, Some("let x = 42; let y = 42;".to_string()));
-    }
-
-    #[gpui::test]
-    async fn whitespace_sensitive(cx: &mut TestAppContext) {
-        let result = test_replace_exact(cx, "let x = 41;", " let x = 41;", "let x = 42;").await;
-        assert_eq!(result, None);
-    }
-
-    #[gpui::test]
-    async fn entire_buffer(cx: &mut TestAppContext) {
-        let result = test_replace_exact(cx, "let x = 41;", "let x = 41;", "let x = 42;").await;
-        assert_eq!(result, Some("let x = 42;".to_string()));
-    }
-
-    async fn test_replace_exact(
-        cx: &mut TestAppContext,
-        whole: &str,
-        old: &str,
-        new: &str,
-    ) -> Option<String> {
-        let buffer = cx.new(|cx| language::Buffer::local(whole, cx));
-
-        let buffer_snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        let diff = replace_exact(old, new, &buffer_snapshot).await;
-        diff.map(|diff| {
-            buffer.update(cx, |buffer, cx| {
-                let _ = buffer.apply_diff(diff, cx);
-                buffer.text()
-            })
-        })
-    }
-}
-
-#[cfg(test)]
-mod flexible_indent_tests {
-    use super::*;
-    use gpui::TestAppContext;
-    use gpui::prelude::*;
-    use unindent::Unindent;
-
-    #[gpui::test]
-    fn test_underindented_single_line(cx: &mut TestAppContext) {
-        let cur = "        let a = 41;".to_string();
-        let old = "    let a = 41;".to_string();
-        let new = "    let a = 42;".to_string();
-        let exp = "        let a = 42;".to_string();
-
-        let result = test_replace_with_flexible_indent(cx, &cur, &old, &new);
-
-        assert_eq!(result, Some(exp.to_string()))
-    }
-
-    #[gpui::test]
-    fn test_overindented_single_line(cx: &mut TestAppContext) {
-        let cur = "    let a = 41;".to_string();
-        let old = "        let a = 41;".to_string();
-        let new = "        let a = 42;".to_string();
-        let exp = "    let a = 42;".to_string();
-
-        let result = test_replace_with_flexible_indent(cx, &cur, &old, &new);
-
-        assert_eq!(result, Some(exp.to_string()))
-    }
-
-    #[gpui::test]
-    fn test_underindented_multi_line(cx: &mut TestAppContext) {
-        let whole = r#"
-            fn test() {
-                let x = 5;
-                println!("x = {}", x);
-                let y = 10;
-            }
-        "#
-        .unindent();
-
-        let old = r#"
-            let x = 5;
-            println!("x = {}", x);
-        "#
-        .unindent();
-
-        let new = r#"
-            let x = 42;
-            println!("New value: {}", x);
-        "#
-        .unindent();
-
-        let expected = r#"
-            fn test() {
-                let x = 42;
-                println!("New value: {}", x);
-                let y = 10;
-            }
-        "#
-        .unindent();
-
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            Some(expected.to_string())
-        );
-    }
-
-    #[gpui::test]
-    fn test_overindented_multi_line(cx: &mut TestAppContext) {
-        let cur = r#"
-            fn foo() {
-                let a = 41;
-                let b = 3.13;
-            }
-        "#
-        .unindent();
-
-        // 6 space indent instead of 4
-        let old = "      let a = 41;\n      let b = 3.13;";
-        let new = "      let a = 42;\n      let b = 3.14;";
-
-        let expected = r#"
-            fn foo() {
-                let a = 42;
-                let b = 3.14;
-            }
-        "#
-        .unindent();
-
-        let result = test_replace_with_flexible_indent(cx, &cur, &old, &new);
-
-        assert_eq!(result, Some(expected.to_string()))
-    }
-
-    #[gpui::test]
-    fn test_replace_inconsistent_indentation(cx: &mut TestAppContext) {
-        let whole = r#"
-            fn test() {
-                if condition {
-                    println!("{}", 43);
-                }
-            }
-        "#
-        .unindent();
-
-        let old = r#"
-            if condition {
-            println!("{}", 43);
-        "#
-        .unindent();
-
-        let new = r#"
-            if condition {
-            println!("{}", 42);
-        "#
-        .unindent();
-
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            None
-        );
-    }
-
-    #[gpui::test]
-    fn test_replace_with_empty_lines(cx: &mut TestAppContext) {
-        // Test with empty lines
-        let whole = r#"
-            fn test() {
-                let x = 5;
-
-                println!("x = {}", x);
-            }
-        "#
-        .unindent();
-
-        let old = r#"
-            let x = 5;
-
-            println!("x = {}", x);
-        "#
-        .unindent();
-
-        let new = r#"
-            let x = 10;
-
-            println!("New x: {}", x);
-        "#
-        .unindent();
-
-        let expected = r#"
-            fn test() {
-                let x = 10;
-
-                println!("New x: {}", x);
-            }
-        "#
-        .unindent();
-
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            Some(expected.to_string())
-        );
-    }
-
-    #[gpui::test]
-    fn test_replace_no_match(cx: &mut TestAppContext) {
-        let whole = r#"
-            fn test() {
-                let x = 5;
-            }
-        "#
-        .unindent();
-
-        let old = r#"
-            let y = 10;
-        "#
-        .unindent();
-
-        let new = r#"
-            let y = 20;
-        "#
-        .unindent();
-
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            None
-        );
-    }
-
-    #[gpui::test]
-    fn test_replace_whole_ends_before_matching_old(cx: &mut TestAppContext) {
-        let whole = r#"
-            fn test() {
-                let x = 5;
-        "#
-        .unindent();
-
-        let old = r#"
-            let x = 5;
-            println!("x = {}", x);
-        "#
-        .unindent();
-
-        let new = r#"
-            let x = 10;
-            println!("x = {}", x);
-        "#
-        .unindent();
-
-        // Should return None because whole doesn't fully contain the old text
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            None
-        );
-    }
-
-    #[gpui::test]
-    fn test_replace_whole_is_shorter_than_old(cx: &mut TestAppContext) {
-        let whole = r#"
-            let x = 5;
-        "#
-        .unindent();
-
-        let old = r#"
-            let x = 5;
-            let y = 10;
-        "#
-        .unindent();
-
-        let new = r#"
-            let x = 5;
-            let y = 20;
-        "#
-        .unindent();
-
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            None
-        );
-    }
-
-    #[gpui::test]
-    fn test_replace_old_is_empty(cx: &mut TestAppContext) {
-        let whole = r#"
-            fn test() {
-                let x = 5;
-            }
-        "#
-        .unindent();
-
-        let old = "";
-        let new = r#"
-            let y = 10;
-        "#
-        .unindent();
-
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            None
-        );
-    }
-
-    #[gpui::test]
-    fn test_replace_whole_is_empty(cx: &mut TestAppContext) {
-        let whole = "";
-        let old = r#"
-            let x = 5;
-        "#
-        .unindent();
-
-        let new = r#"
-            let x = 10;
-        "#
-        .unindent();
-
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            None
-        );
-    }
-
-    #[test]
-    fn test_lines_with_min_indent() {
-        // Empty string
-        assert_eq!(lines_with_min_indent(""), (vec![], 0));
-
-        // Single line without indentation
-        assert_eq!(lines_with_min_indent("hello"), (vec!["hello"], 0));
-
-        // Multiple lines with no indentation
-        assert_eq!(
-            lines_with_min_indent("line1\nline2\nline3"),
-            (vec!["line1", "line2", "line3"], 0)
-        );
-
-        // Multiple lines with consistent indentation
-        assert_eq!(
-            lines_with_min_indent("  line1\n  line2\n  line3"),
-            (vec!["  line1", "  line2", "  line3"], 2)
-        );
-
-        // Multiple lines with varying indentation
-        assert_eq!(
-            lines_with_min_indent("    line1\n  line2\n      line3"),
-            (vec!["    line1", "  line2", "      line3"], 2)
-        );
-
-        // Lines with mixed indentation and empty lines
-        assert_eq!(
-            lines_with_min_indent("    line1\n\n  line2"),
-            (vec!["    line1", "", "  line2"], 2)
-        );
-    }
-
-    #[gpui::test]
-    fn test_replace_with_missing_indent_uneven_match(cx: &mut TestAppContext) {
-        let whole = r#"
-            fn test() {
-                if true {
-                        let x = 5;
-                        println!("x = {}", x);
-                }
-            }
-        "#
-        .unindent();
-
-        let old = r#"
-            let x = 5;
-            println!("x = {}", x);
-        "#
-        .unindent();
-
-        let new = r#"
-            let x = 42;
-            println!("x = {}", x);
-        "#
-        .unindent();
-
-        let expected = r#"
-            fn test() {
-                if true {
-                        let x = 42;
-                        println!("x = {}", x);
-                }
-            }
-        "#
-        .unindent();
-
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            Some(expected.to_string())
-        );
-    }
-
-    #[gpui::test]
-    fn test_replace_big_example(cx: &mut TestAppContext) {
-        let whole = r#"
-            #[cfg(test)]
-            mod tests {
-                use super::*;
-
-                #[test]
-                fn test_is_valid_age() {
-                    assert!(is_valid_age(0));
-                    assert!(!is_valid_age(151));
-                }
-            }
-        "#
-        .unindent();
-
-        let old = r#"
-            #[test]
-            fn test_is_valid_age() {
-                assert!(is_valid_age(0));
-                assert!(!is_valid_age(151));
-            }
-        "#
-        .unindent();
-
-        let new = r#"
-            #[test]
-            fn test_is_valid_age() {
-                assert!(is_valid_age(0));
-                assert!(!is_valid_age(151));
-            }
-
-            #[test]
-            fn test_group_people_by_age() {
-                let people = vec![
-                    Person::new("Young One", 5, "young@example.com").unwrap(),
-                    Person::new("Teen One", 15, "teen@example.com").unwrap(),
-                    Person::new("Teen Two", 18, "teen2@example.com").unwrap(),
-                    Person::new("Adult One", 25, "adult@example.com").unwrap(),
-                ];
-
-                let groups = group_people_by_age(&people);
-
-                assert_eq!(groups.get(&0).unwrap().len(), 1);  // One person in 0-9
-                assert_eq!(groups.get(&10).unwrap().len(), 2); // Two people in 10-19
-                assert_eq!(groups.get(&20).unwrap().len(), 1); // One person in 20-29
-            }
-        "#
-        .unindent();
-        let expected = r#"
-            #[cfg(test)]
-            mod tests {
-                use super::*;
-
-                #[test]
-                fn test_is_valid_age() {
-                    assert!(is_valid_age(0));
-                    assert!(!is_valid_age(151));
-                }
-
-                #[test]
-                fn test_group_people_by_age() {
-                    let people = vec![
-                        Person::new("Young One", 5, "young@example.com").unwrap(),
-                        Person::new("Teen One", 15, "teen@example.com").unwrap(),
-                        Person::new("Teen Two", 18, "teen2@example.com").unwrap(),
-                        Person::new("Adult One", 25, "adult@example.com").unwrap(),
-                    ];
-
-                    let groups = group_people_by_age(&people);
-
-                    assert_eq!(groups.get(&0).unwrap().len(), 1);  // One person in 0-9
-                    assert_eq!(groups.get(&10).unwrap().len(), 2); // Two people in 10-19
-                    assert_eq!(groups.get(&20).unwrap().len(), 1); // One person in 20-29
-                }
-            }
-        "#
-        .unindent();
-        assert_eq!(
-            test_replace_with_flexible_indent(cx, &whole, &old, &new),
-            Some(expected.to_string())
-        );
-    }
-
-    #[test]
-    fn test_drop_lines_prefix() {
-        // Empty array
-        assert_eq!(drop_lines_prefix(&[], 2), Vec::<&str>::new());
-
-        // Zero prefix length
-        assert_eq!(
-            drop_lines_prefix(&["line1", "line2"], 0),
-            vec!["line1", "line2"]
-        );
-
-        // Normal prefix drop
-        assert_eq!(
-            drop_lines_prefix(&["  line1", "  line2"], 2),
-            vec!["line1", "line2"]
-        );
-
-        // Prefix longer than some lines
-        assert_eq!(drop_lines_prefix(&["  line1", "a"], 2), vec!["line1", ""]);
-
-        // Prefix longer than all lines
-        assert_eq!(drop_lines_prefix(&["a", "b"], 5), vec!["", ""]);
-
-        // Mixed length lines
-        assert_eq!(
-            drop_lines_prefix(&["    line1", "  line2", "      line3"], 2),
-            vec!["  line1", "line2", "    line3"]
-        );
-    }
-
-    #[gpui::test]
-    async fn test_replace_exact_basic(cx: &mut TestAppContext) {
-        let buffer = cx.new(|cx| language::Buffer::local("let x = 41;", cx));
-        let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        let diff = replace_exact("let x = 41;", "let x = 42;", &snapshot).await;
-        assert!(diff.is_some());
-
-        let diff = diff.unwrap();
-        assert_eq!(diff.edits.len(), 1);
-
-        let result = buffer.update(cx, |buffer, cx| {
-            let _ = buffer.apply_diff(diff, cx);
-            buffer.text()
-        });
-
-        assert_eq!(result, "let x = 42;");
-    }
-
-    #[gpui::test]
-    async fn test_replace_exact_no_match(cx: &mut TestAppContext) {
-        let buffer = cx.new(|cx| language::Buffer::local("let x = 41;", cx));
-        let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        let diff = replace_exact("let y = 42;", "let y = 43;", &snapshot).await;
-        assert!(diff.is_none());
-    }
-
-    #[gpui::test]
-    async fn test_replace_exact_multi_line(cx: &mut TestAppContext) {
-        let buffer = cx.new(|cx| {
-            language::Buffer::local(
-                "fn example() {\n    let x = 41;\n    println!(\"x = {}\", x);\n}",
-                cx,
-            )
-        });
-        let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        let old_text = "    let x = 41;\n    println!(\"x = {}\", x);";
-        let new_text = "    let x = 42;\n    println!(\"x = {}\", x);";
-        let diff = replace_exact(old_text, new_text, &snapshot).await;
-        assert!(diff.is_some());
-
-        let diff = diff.unwrap();
-        let result = buffer.update(cx, |buffer, cx| {
-            let _ = buffer.apply_diff(diff, cx);
-            buffer.text()
-        });
-
-        assert_eq!(
-            result,
-            "fn example() {\n    let x = 42;\n    println!(\"x = {}\", x);\n}"
-        );
-    }
-
-    #[gpui::test]
-    async fn test_replace_exact_multiple_occurrences(cx: &mut TestAppContext) {
-        let buffer =
-            cx.new(|cx| language::Buffer::local("let x = 41;\nlet y = 41;\nlet z = 41;", cx));
-        let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        // Should replace only the first occurrence
-        let diff = replace_exact("let x = 41;", "let x = 42;", &snapshot).await;
-        assert!(diff.is_some());
-
-        let diff = diff.unwrap();
-        let result = buffer.update(cx, |buffer, cx| {
-            let _ = buffer.apply_diff(diff, cx);
-            buffer.text()
-        });
-
-        assert_eq!(result, "let x = 42;\nlet y = 41;\nlet z = 41;");
-    }
-
-    #[gpui::test]
-    async fn test_replace_exact_empty_buffer(cx: &mut TestAppContext) {
-        let buffer = cx.new(|cx| language::Buffer::local("", cx));
-        let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        let diff = replace_exact("let x = 41;", "let x = 42;", &snapshot).await;
-        assert!(diff.is_none());
-    }
-
-    #[gpui::test]
-    async fn test_replace_exact_partial_match(cx: &mut TestAppContext) {
-        let buffer = cx.new(|cx| language::Buffer::local("let x = 41; let y = 42;", cx));
-        let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        // Verify substring replacement actually works
-        let diff = replace_exact("let x = 41", "let x = 42", &snapshot).await;
-        assert!(diff.is_some());
-
-        let diff = diff.unwrap();
-        let result = buffer.update(cx, |buffer, cx| {
-            let _ = buffer.apply_diff(diff, cx);
-            buffer.text()
-        });
-
-        assert_eq!(result, "let x = 42; let y = 42;");
-    }
-
-    #[gpui::test]
-    async fn test_replace_exact_whitespace_sensitive(cx: &mut TestAppContext) {
-        let buffer = cx.new(|cx| language::Buffer::local("let x = 41;", cx));
-        let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        let diff = replace_exact(" let x = 41;", "let x = 42;", &snapshot).await;
-        assert!(diff.is_none());
-    }
-
-    #[gpui::test]
-    async fn test_replace_exact_entire_buffer(cx: &mut TestAppContext) {
-        let buffer = cx.new(|cx| language::Buffer::local("let x = 41;", cx));
-        let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        let diff = replace_exact("let x = 41;", "let x = 42;", &snapshot).await;
-        assert!(diff.is_some());
-
-        let diff = diff.unwrap();
-        let result = buffer.update(cx, |buffer, cx| {
-            let _ = buffer.apply_diff(diff, cx);
-            buffer.text()
-        });
-
-        assert_eq!(result, "let x = 42;");
-    }
-
-    fn test_replace_with_flexible_indent(
-        cx: &mut TestAppContext,
-        whole: &str,
-        old: &str,
-        new: &str,
-    ) -> Option<String> {
-        // Create a local buffer with the test content
-        let buffer = cx.new(|cx| language::Buffer::local(whole, cx));
-
-        // Get the buffer snapshot
-        let buffer_snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
-
-        // Call replace_flexible and transform the result
-        replace_with_flexible_indent(old, new, &buffer_snapshot).map(|diff| {
-            buffer.update(cx, |buffer, cx| {
-                let _ = buffer.apply_diff(diff, cx);
-                buffer.text()
-            })
-        })
-    }
-}
--- a/crates/assistant_tools/src/streaming_edit_file_tool.rs
+++ b/crates/assistant_tools/src/streaming_edit_file_tool.rs
@@ -1,355 +0,0 @@
-use crate::{
-    Templates,
-    edit_agent::{EditAgent, EditAgentOutputEvent},
-    edit_file_tool::EditFileToolCard,
-    schema::json_schema_for,
-};
-use anyhow::{Context as _, Result, anyhow};
-use assistant_tool::{ActionLog, AnyToolCard, Tool, ToolResult};
-use futures::StreamExt;
-use gpui::{AnyWindowHandle, App, AppContext, AsyncApp, Entity, Task};
-use indoc::formatdoc;
-use language_model::{
-    LanguageModelRegistry, LanguageModelRequestMessage, LanguageModelToolSchemaFormat,
-};
-use project::Project;
-use schemars::JsonSchema;
-use serde::{Deserialize, Serialize};
-use std::{path::PathBuf, sync::Arc};
-use ui::prelude::*;
-use util::ResultExt;
-
-pub struct StreamingEditFileTool;
-
-#[derive(Debug, Serialize, Deserialize, JsonSchema)]
-pub struct StreamingEditFileToolInput {
-    /// A one-line, user-friendly markdown description of the edit. This will be
-    /// shown in the UI and also passed to another model to perform the edit.
-    ///
-    /// Be terse, but also descriptive in what you want to achieve with this
-    /// edit. Avoid generic instructions.
-    ///
-    /// NEVER mention the file path in this description.
-    ///
-    /// <example>Fix API endpoint URLs</example>
-    /// <example>Update copyright year in `page_footer`</example>
-    ///
-    /// Make sure to include this field before all the others in the input object
-    /// so that we can display it immediately.
-    pub display_description: String,
-
-    /// The full path of the file to create or modify in the project.
-    ///
-    /// WARNING: When specifying which file path need changing, you MUST
-    /// start each path with one of the project's root directories.
-    ///
-    /// The following examples assume we have two root directories in the project:
-    /// - backend
-    /// - frontend
-    ///
-    /// <example>
-    /// `backend/src/main.rs`
-    ///
-    /// Notice how the file path starts with root-1. Without that, the path
-    /// would be ambiguous and the call would fail!
-    /// </example>
-    ///
-    /// <example>
-    /// `frontend/db.js`
-    /// </example>
-    pub path: PathBuf,
-
-    /// If true, this tool will recreate the file from scratch.
-    /// If false, this tool will produce granular edits to an existing file.
-    ///
-    /// When a file already exists or you just created it, always prefer editing
-    /// it as opposed to recreating it from scratch.
-    pub create_or_overwrite: bool,
-}
-
-#[derive(Debug, Serialize, Deserialize, JsonSchema)]
-struct PartialInput {
-    #[serde(default)]
-    path: String,
-    #[serde(default)]
-    display_description: String,
-}
-
-const DEFAULT_UI_TEXT: &str = "Editing file";
-
-impl Tool for StreamingEditFileTool {
-    fn name(&self) -> String {
-        "edit_file".into()
-    }
-
-    fn needs_confirmation(&self, _: &serde_json::Value, _: &App) -> bool {
-        false
-    }
-
-    fn description(&self) -> String {
-        include_str!("streaming_edit_file_tool/description.md").to_string()
-    }
-
-    fn icon(&self) -> IconName {
-        IconName::Pencil
-    }
-
-    fn input_schema(&self, format: LanguageModelToolSchemaFormat) -> Result<serde_json::Value> {
-        json_schema_for::<StreamingEditFileToolInput>(format)
-    }
-
-    fn ui_text(&self, input: &serde_json::Value) -> String {
-        match serde_json::from_value::<StreamingEditFileToolInput>(input.clone()) {
-            Ok(input) => input.display_description,
-            Err(_) => "Editing file".to_string(),
-        }
-    }
-
-    fn still_streaming_ui_text(&self, input: &serde_json::Value) -> String {
-        if let Some(input) = serde_json::from_value::<PartialInput>(input.clone()).ok() {
-            let description = input.display_description.trim();
-            if !description.is_empty() {
-                return description.to_string();
-            }
-
-            let path = input.path.trim();
-            if !path.is_empty() {
-                return path.to_string();
-            }
-        }
-
-        DEFAULT_UI_TEXT.to_string()
-    }
-
-    fn run(
-        self: Arc<Self>,
-        input: serde_json::Value,
-        messages: &[LanguageModelRequestMessage],
-        project: Entity<Project>,
-        action_log: Entity<ActionLog>,
-        window: Option<AnyWindowHandle>,
-        cx: &mut App,
-    ) -> ToolResult {
-        let input = match serde_json::from_value::<StreamingEditFileToolInput>(input) {
-            Ok(input) => input,
-            Err(err) => return Task::ready(Err(anyhow!(err))).into(),
-        };
-
-        let Some(project_path) = project.read(cx).find_project_path(&input.path, cx) else {
-            return Task::ready(Err(anyhow!(
-                "Path {} not found in project",
-                input.path.display()
-            )))
-            .into();
-        };
-        let Some(worktree) = project
-            .read(cx)
-            .worktree_for_id(project_path.worktree_id, cx)
-        else {
-            return Task::ready(Err(anyhow!("Worktree not found for project path"))).into();
-        };
-        let exists = worktree.update(cx, |worktree, cx| {
-            worktree.file_exists(&project_path.path, cx)
-        });
-
-        let card = window.and_then(|window| {
-            window
-                .update(cx, |_, window, cx| {
-                    cx.new(|cx| {
-                        EditFileToolCard::new(input.path.clone(), project.clone(), window, cx)
-                    })
-                })
-                .ok()
-        });
-
-        let card_clone = card.clone();
-        let messages = messages.to_vec();
-        let task = cx.spawn(async move |cx: &mut AsyncApp| {
-            if !input.create_or_overwrite && !exists.await? {
-                return Err(anyhow!("{} not found", input.path.display()));
-            }
-
-            let model = cx
-                .update(|cx| LanguageModelRegistry::read_global(cx).default_model())?
-                .context("default model not set")?
-                .model;
-            let edit_agent = EditAgent::new(model, project.clone(), action_log, Templates::new());
-
-            let buffer = project
-                .update(cx, |project, cx| {
-                    project.open_buffer(project_path.clone(), cx)
-                })?
-                .await?;
-
-            let old_snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
-            let old_text = cx
-                .background_spawn({
-                    let old_snapshot = old_snapshot.clone();
-                    async move { old_snapshot.text() }
-                })
-                .await;
-
-            let (output, mut events) = if input.create_or_overwrite {
-                edit_agent.overwrite(
-                    buffer.clone(),
-                    input.display_description.clone(),
-                    messages,
-                    cx,
-                )
-            } else {
-                edit_agent.edit(
-                    buffer.clone(),
-                    input.display_description.clone(),
-                    messages,
-                    cx,
-                )
-            };
-
-            let mut hallucinated_old_text = false;
-            while let Some(event) = events.next().await {
-                match event {
-                    EditAgentOutputEvent::Edited => {
-                        if let Some(card) = card_clone.as_ref() {
-                            let new_snapshot =
-                                buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
-                            let new_text = cx
-                                .background_spawn({
-                                    let new_snapshot = new_snapshot.clone();
-                                    async move { new_snapshot.text() }
-                                })
-                                .await;
-                            card.update(cx, |card, cx| {
-                                card.set_diff(
-                                    project_path.path.clone(),
-                                    old_text.clone(),
-                                    new_text,
-                                    cx,
-                                );
-                            })
-                            .log_err();
-                        }
-                    }
-                    EditAgentOutputEvent::OldTextNotFound(_) => hallucinated_old_text = true,
-                }
-            }
-            output.await?;
-
-            project
-                .update(cx, |project, cx| project.save_buffer(buffer.clone(), cx))?
-                .await?;
-
-            let new_snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
-            let new_text = cx.background_spawn({
-                let new_snapshot = new_snapshot.clone();
-                async move { new_snapshot.text() }
-            });
-            let diff = cx.background_spawn(async move {
-                language::unified_diff(&old_snapshot.text(), &new_snapshot.text())
-            });
-            let (new_text, diff) = futures::join!(new_text, diff);
-
-            if let Some(card) = card_clone {
-                card.update(cx, |card, cx| {
-                    card.set_diff(project_path.path.clone(), old_text, new_text, cx);
-                })
-                .log_err();
-            }
-
-            let input_path = input.path.display();
-            if diff.is_empty() {
-                if hallucinated_old_text {
-                    Err(anyhow!(formatdoc! {"
-                        Some edits were produced but none of them could be applied.
-                        Read the relevant sections of {input_path} again so that
-                        I can perform the requested edits.
-                    "}))
-                } else {
-                    Ok("No edits were made.".to_string())
-                }
-            } else {
-                Ok(format!("Edited {}:\n\n```diff\n{}\n```", input_path, diff))
-            }
-        });
-
-        ToolResult {
-            output: task,
-            card: card.map(AnyToolCard::from),
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use serde_json::json;
-
-    #[test]
-    fn still_streaming_ui_text_with_path() {
-        let input = json!({
-            "path": "src/main.rs",
-            "display_description": "",
-            "old_string": "old code",
-            "new_string": "new code"
-        });
-
-        assert_eq!(
-            StreamingEditFileTool.still_streaming_ui_text(&input),
-            "src/main.rs"
-        );
-    }
-
-    #[test]
-    fn still_streaming_ui_text_with_description() {
-        let input = json!({
-            "path": "",
-            "display_description": "Fix error handling",
-            "old_string": "old code",
-            "new_string": "new code"
-        });
-
-        assert_eq!(
-            StreamingEditFileTool.still_streaming_ui_text(&input),
-            "Fix error handling",
-        );
-    }
-
-    #[test]
-    fn still_streaming_ui_text_with_path_and_description() {
-        let input = json!({
-            "path": "src/main.rs",
-            "display_description": "Fix error handling",
-            "old_string": "old code",
-            "new_string": "new code"
-        });
-
-        assert_eq!(
-            StreamingEditFileTool.still_streaming_ui_text(&input),
-            "Fix error handling",
-        );
-    }
-
-    #[test]
-    fn still_streaming_ui_text_no_path_or_description() {
-        let input = json!({
-            "path": "",
-            "display_description": "",
-            "old_string": "old code",
-            "new_string": "new code"
-        });
-
-        assert_eq!(
-            StreamingEditFileTool.still_streaming_ui_text(&input),
-            DEFAULT_UI_TEXT,
-        );
-    }
-
-    #[test]
-    fn still_streaming_ui_text_with_null() {
-        let input = serde_json::Value::Null;
-
-        assert_eq!(
-            StreamingEditFileTool.still_streaming_ui_text(&input),
-            DEFAULT_UI_TEXT,
-        );
-    }
-}
--- a/crates/assistant_tools/src/streaming_edit_file_tool/description.md
+++ b/crates/assistant_tools/src/streaming_edit_file_tool/description.md
@@ -1,8 +0,0 @@
-This is a tool for creating a new file or editing an existing file. For moving or renaming files, you should generally use the `terminal` tool with the 'mv' command instead.
-
-Before using this tool:
-
-1. Use the `read_file` tool to understand the file's contents and context
-
-2. Verify the directory path is correct (only applicable when creating new files):
-   - Use the `list_directory` tool to verify the parent directory exists and is the correct location
--- a/crates/assistant_tools/src/templates/edit_file_prompt.hbs
+++ b/crates/assistant_tools/src/templates/edit_file_prompt.hbs
@@ -1,6 +1,4 @@
-You are an expert text editor and your task is to produce a series of edits to a file given a description of the changes you need to make.
-
-You MUST respond with a series of edits to that one file in the following format:
+You MUST respond with a series of edits to a file, using the following format:

 ```
 <edits>
@@ -31,8 +29,12 @@ NEW TEXT 3 HERE

 Rules for editing:

- `old_text` represents lines in the input file that will be replaced with `new_text`. `old_text` MUST exactly match the existing file content, character for character, including indentation.
- Always include enough context around the lines you want to replace in `old_text` such that it's impossible to mistake them for other lines.
+- `old_text` represents lines in the input file that will be replaced with `new_text`.
+- `old_text` MUST exactly match the existing file content, character for character, including indentation.
+- `old_text` MUST NEVER come from the outline, but from actual lines in the file.
+- Strive to be minimal in the lines you replace in `old_text`:
+  - If the lines you want to replace are unique, you MUST include just those in the `old_text`.
+  - If the lines you want to replace are NOT unique, you MUST include enough context around them in `old_text` to distinguish them from other lines.
 - If you want to replace many occurrences of the same text, repeat the same `old_text`/`new_text` pair multiple times and I will apply them sequentially, one occurrence at a time.
 - When reporting multiple edits, each edit assumes the previous one has already been applied! Therefore, you must ensure `old_text` doesn't reference text that has already been modified by a previous edit.
 - Don't explain the edits, just report them.
@@ -47,3 +49,5 @@ Rules for editing:
 <edit_description>
 {{edit_description}}
 </edit_description>
+
+Tool calls have been disabled. You MUST start your response with <edits>.
--- a/Show More
+++ b/Show More