zed 0.187.3

This PR prevents the debug panel pane context menu from showing when you
click your secondary mouse button in **stackframe**, **breakpoint** and
**module** list entries.

Release Notes:

- N/A

.github/ISSUE_TEMPLATE/04_bug_debugger.yml

@@ -0,0 +1,35 @@
+name: Bug Report (Debugger)
+description: Zed Debugger-Related Bugs
+type: "Bug"
+labels: ["debugger"]
+title: "Debugger: <a short description of the Debugger bug>"
+body:
+  - type: textarea
+    attributes:
+      label: Summary
+      description: Describe the bug with a one line summary, and provide detailed reproduction steps
+      value: |
+        <!-- Please insert a one line summary of the issue below -->
+        SUMMARY_SENTENCE_HERE
+
+        ### Description
+        <!--  Describe with sufficient detail to reproduce from a clean Zed install. -->
+        Steps to trigger the problem:
+        1.
+        2.
+        3.
+
+        Actual Behavior:
+        Expected Behavior:
+
+    validations:
+      required: true
+  - type: textarea
+    id: environment
+    attributes:
+      label: Zed Version and System Specs
+      description: 'Open Zed, and in the command palette select "zed: Copy System Specs Into Clipboard"'
+      placeholder: |
+        Output of "zed: Copy System Specs Into Clipboard"
+    validations:
+      required: true

.gitignore

@@ -2,6 +2,7 @@
 **/cargo-target
 **/target
 **/venv
+**/.direnv
 *.wasm
 *.xcodeproj
 .DS_Store

.zed/debug.json

@@ -2,16 +2,14 @@
   {
     "label": "Debug Zed (CodeLLDB)",
     "adapter": "CodeLLDB",
-    "program": "$ZED_WORKTREE_ROOT/target/debug/zed",
-    "request": "launch",
-    "cwd": "$ZED_WORKTREE_ROOT"
+    "program": "target/debug/zed",
+    "request": "launch"
   },
   {
     "label": "Debug Zed (GDB)",
     "adapter": "GDB",
-    "program": "$ZED_WORKTREE_ROOT/target/debug/zed",
+    "program": "target/debug/zed",
     "request": "launch",
-    "cwd": "$ZED_WORKTREE_ROOT",
     "initialize_args": {
       "stopAtBeginningOfMainSubprogram": true
     }

Cargo.lock

@@ -4134,6 +4134,18 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "debug_adapter_extension"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "dap",
+ "extension",
+ "gpui",
+ "workspace-hack",
+]
+
 [[package]]
 name = "debugger_tools"
 version = "0.1.0"
@@ -4167,6 +4179,7 @@ dependencies = [
  "editor",
  "env_logger 0.11.8",
  "feature_flags",
+ "file_icons",
  "futures 0.3.31",
  "fuzzy",
  "gpui",
@@ -5038,6 +5051,7 @@ dependencies = [
  "async-tar",
  "async-trait",
  "collections",
+ "dap",
  "fs",
  "futures 0.3.31",
  "gpui",
@@ -5050,6 +5064,7 @@ dependencies = [
  "semantic_version",
  "serde",
  "serde_json",
+ "task",
  "toml 0.8.20",
  "util",
  "wasm-encoder 0.221.3",
@@ -5093,6 +5108,7 @@ dependencies = [
  "client",
  "collections",
  "ctor",
+ "dap",
  "env_logger 0.11.8",
  "extension",
  "fs",
@@ -10037,7 +10053,7 @@ name = "perplexity"
 version = "0.1.0"
 dependencies = [
  "serde",
- "zed_extension_api 0.5.0",
+ "zed_extension_api 0.6.0",
 ]
 
 [[package]]
@@ -18017,7 +18033,6 @@ dependencies = [
  "aho-corasick",
  "anstream",
  "arrayvec",
- "async-compression",
  "async-std",
  "async-tungstenite",
  "aws-config",
@@ -18525,7 +18540,7 @@ dependencies = [
 
 [[package]]
 name = "zed"
-version = "0.187.0"
+version = "0.187.3"
 dependencies = [
  "activity_indicator",
  "agent",
@@ -18695,7 +18710,7 @@ dependencies = [
 
 [[package]]
 name = "zed_extension_api"
-version = "0.5.0"
+version = "0.6.0"
 dependencies = [
  "serde",
  "serde_json",
@@ -18755,7 +18770,7 @@ dependencies = [
 name = "zed_test_extension"
 version = "0.1.0"
 dependencies = [
- "zed_extension_api 0.5.0",
+ "zed_extension_api 0.6.0",
 ]
 
 [[package]]

Cargo.toml

@@ -37,6 +37,7 @@ members = [
     "crates/dap",
     "crates/dap_adapters",
     "crates/db",
+    "crates/debug_adapter_extension",
     "crates/debugger_tools",
     "crates/debugger_ui",
     "crates/deepseek",
@@ -243,6 +244,7 @@ credentials_provider = { path = "crates/credentials_provider" }
 dap = { path = "crates/dap" }
 dap_adapters = { path = "crates/dap_adapters" }
 db = { path = "crates/db" }
+debug_adapter_extension = { path = "crates/debug_adapter_extension" }
 debugger_tools = { path = "crates/debugger_tools" }
 debugger_ui = { path = "crates/debugger_ui" }
 deepseek = { path = "crates/deepseek" }

assets/keymaps/default-linux.json

@@ -538,7 +538,6 @@
       "ctrl-alt-b": "workspace::ToggleRightDock",
       "ctrl-b": "workspace::ToggleLeftDock",
       "ctrl-j": "workspace::ToggleBottomDock",
-      "ctrl-w": "workspace::CloseActiveDock",
       "ctrl-alt-y": "workspace::CloseAllDocks",
       "shift-find": "pane::DeploySearch",
       "ctrl-shift-f": "pane::DeploySearch",
@@ -979,5 +978,12 @@
     "bindings": {
       "ctrl-r": "diagnostics::ToggleDiagnosticsRefresh"
     }
+  },
+  {
+    "context": "DebugConsole > Editor",
+    "use_key_equivalents": true,
+    "bindings": {
+      "enter": "menu::Confirm"
+    }
   }
 ]

assets/keymaps/default-macos.json

@@ -608,7 +608,6 @@
       "cmd-b": "workspace::ToggleLeftDock",
       "cmd-r": "workspace::ToggleRightDock",
       "cmd-j": "workspace::ToggleBottomDock",
-      "cmd-w": "workspace::CloseActiveDock",
       "alt-cmd-y": "workspace::CloseAllDocks",
       "cmd-shift-f": "pane::DeploySearch",
       "cmd-shift-h": ["pane::DeploySearch", { "replace_enabled": true }],
@@ -1085,5 +1084,12 @@
     "bindings": {
       "ctrl-r": "diagnostics::ToggleDiagnosticsRefresh"
     }
+  },
+  {
+    "context": "DebugConsole > Editor",
+    "use_key_equivalents": true,
+    "bindings": {
+      "enter": "menu::Confirm"
+    }
   }
 ]

assets/settings/default.json

@@ -113,8 +113,8 @@
   // Whether to show the informational hover box when moving the mouse
   // over symbols in the editor.
   "hover_popover_enabled": true,
-  // Time to wait before showing the informational hover box
-  "hover_popover_delay": 350,
+  // Time to wait in milliseconds before showing the informational hover box.
+  "hover_popover_delay": 300,
   // Whether to confirm before quitting Zed.
   "confirm_quit": false,
   // Whether to restore last closed project when fresh Zed instance is opened.

crates/agent/src/active_thread.rs

@@ -33,7 +33,9 @@ use language_model::{
     LanguageModelRequestMessage, LanguageModelToolUseId, MessageContent, Role, StopReason,
 };
 use markdown::parser::{CodeBlockKind, CodeBlockMetadata};
-use markdown::{HeadingLevelStyles, Markdown, MarkdownElement, MarkdownStyle, ParsedMarkdown};
+use markdown::{
+    HeadingLevelStyles, Markdown, MarkdownElement, MarkdownStyle, ParsedMarkdown, PathWithRange,
+};
 use project::{ProjectEntryId, ProjectItem as _};
 use rope::Point;
 use settings::{Settings as _, SettingsStore, update_settings_file};
@@ -381,18 +383,25 @@ fn render_markdown_code_block(
                 )
             } else {
                 let content = if let Some(parent) = path_range.path.parent() {
+                    let file_name = file_name.to_string_lossy().to_string();
+                    let path = parent.to_string_lossy().to_string();
+                    let path_and_file = format!("{}/{}", path, file_name);
+
                     h_flex()
+                        .id(("code-block-header-label", ix))
                         .ml_1()
                         .gap_1()
-                        .child(
-                            Label::new(file_name.to_string_lossy().to_string())
-                                .size(LabelSize::Small),
-                        )
-                        .child(
-                            Label::new(parent.to_string_lossy().to_string())
-                                .color(Color::Muted)
-                                .size(LabelSize::Small),
-                        )
+                        .child(Label::new(file_name).size(LabelSize::Small))
+                        .child(Label::new(path).color(Color::Muted).size(LabelSize::Small))
+                        .tooltip(move |window, cx| {
+                            Tooltip::with_meta(
+                                "Jump to File",
+                                None,
+                                path_and_file.clone(),
+                                window,
+                                cx,
+                            )
+                        })
                         .into_any_element()
                 } else {
                     Label::new(path_range.path.to_string_lossy().to_string())
@@ -402,7 +411,7 @@ fn render_markdown_code_block(
                 };
 
                 h_flex()
-                    .id(("code-block-header-label", ix))
+                    .id(("code-block-header-button", ix))
                     .w_full()
                     .max_w_full()
                     .px_1()
@@ -410,7 +419,6 @@ fn render_markdown_code_block(
                     .cursor_pointer()
                     .rounded_sm()
                     .hover(|item| item.bg(cx.theme().colors().element_hover.opacity(0.5)))
-                    .tooltip(Tooltip::text("Jump to File"))
                     .child(
                         h_flex()
                             .gap_0p5()
@@ -430,49 +438,8 @@ fn render_markdown_code_block(
                         let path_range = path_range.clone();
                         move |_, window, cx| {
                             workspace
-                                .update(cx, {
-                                    |workspace, cx| {
-                                        let Some(project_path) = workspace
-                                            .project()
-                                            .read(cx)
-                                            .find_project_path(&path_range.path, cx)
-                                        else {
-                                            return;
-                                        };
-                                        let Some(target) = path_range.range.as_ref().map(|range| {
-                                            Point::new(
-                                                // Line number is 1-based
-                                                range.start.line.saturating_sub(1),
-                                                range.start.col.unwrap_or(0),
-                                            )
-                                        }) else {
-                                            return;
-                                        };
-                                        let open_task = workspace.open_path(
-                                            project_path,
-                                            None,
-                                            true,
-                                            window,
-                                            cx,
-                                        );
-                                        window
-                                            .spawn(cx, async move |cx| {
-                                                let item = open_task.await?;
-                                                if let Some(active_editor) =
-                                                    item.downcast::<Editor>()
-                                                {
-                                                    active_editor
-                                                        .update_in(cx, |editor, window, cx| {
-                                                            editor.go_to_singleton_buffer_point(
-                                                                target, window, cx,
-                                                            );
-                                                        })
-                                                        .ok();
-                                                }
-                                                anyhow::Ok(())
-                                            })
-                                            .detach_and_log_err(cx);
-                                    }
+                                .update(cx, |workspace, cx| {
+                                    open_path(&path_range, window, workspace, cx)
                                 })
                                 .ok();
                         }
@@ -501,10 +468,87 @@ fn render_markdown_code_block(
         .element_background
         .blend(cx.theme().colors().editor_foreground.opacity(0.01));
 
+    let control_buttons = h_flex()
+        .visible_on_hover(CODEBLOCK_CONTAINER_GROUP)
+        .absolute()
+        .top_0()
+        .right_0()
+        .h_full()
+        .bg(codeblock_header_bg)
+        .rounded_tr_md()
+        .px_1()
+        .gap_1()
+        .child(
+            IconButton::new(
+                ("copy-markdown-code", ix),
+                if codeblock_was_copied {
+                    IconName::Check
+                } else {
+                    IconName::Copy
+                },
+            )
+            .icon_color(Color::Muted)
+            .shape(ui::IconButtonShape::Square)
+            .tooltip(Tooltip::text("Copy Code"))
+            .on_click({
+                let active_thread = active_thread.clone();
+                let parsed_markdown = parsed_markdown.clone();
+                let code_block_range = metadata.content_range.clone();
+                move |_event, _window, cx| {
+                    active_thread.update(cx, |this, cx| {
+                        this.copied_code_block_ids.insert((message_id, ix));
+
+                        let code = parsed_markdown.source()[code_block_range.clone()].to_string();
+                        cx.write_to_clipboard(ClipboardItem::new_string(code));
+
+                        cx.spawn(async move |this, cx| {
+                            cx.background_executor().timer(Duration::from_secs(2)).await;
+
+                            cx.update(|cx| {
+                                this.update(cx, |this, cx| {
+                                    this.copied_code_block_ids.remove(&(message_id, ix));
+                                    cx.notify();
+                                })
+                            })
+                            .ok();
+                        })
+                        .detach();
+                    });
+                }
+            }),
+        )
+        .when(can_expand, |header| {
+            header.child(
+                IconButton::new(
+                    ("expand-collapse-code", ix),
+                    if is_expanded {
+                        IconName::ChevronUp
+                    } else {
+                        IconName::ChevronDown
+                    },
+                )
+                .icon_color(Color::Muted)
+                .shape(ui::IconButtonShape::Square)
+                .tooltip(Tooltip::text(if is_expanded {
+                    "Collapse Code"
+                } else {
+                    "Expand Code"
+                }))
+                .on_click({
+                    let active_thread = active_thread.clone();
+                    move |_event, _window, cx| {
+                        active_thread.update(cx, |this, cx| {
+                            this.toggle_codeblock_expanded(message_id, ix);
+                            cx.notify();
+                        });
+                    }
+                }),
+            )
+        });
+
     let codeblock_header = h_flex()
-        .py_1()
-        .pl_1p5()
-        .pr_1()
+        .relative()
+        .p_1()
         .gap_1()
         .justify_between()
         .border_b_1()
@@ -512,79 +556,7 @@ fn render_markdown_code_block(
         .bg(codeblock_header_bg)
         .rounded_t_md()
         .children(label)
-        .child(
-            h_flex()
-                .visible_on_hover(CODEBLOCK_CONTAINER_GROUP)
-                .gap_1()
-                .child(
-                    IconButton::new(
-                        ("copy-markdown-code", ix),
-                        if codeblock_was_copied {
-                            IconName::Check
-                        } else {
-                            IconName::Copy
-                        },
-                    )
-                    .icon_color(Color::Muted)
-                    .shape(ui::IconButtonShape::Square)
-                    .tooltip(Tooltip::text("Copy Code"))
-                    .on_click({
-                        let active_thread = active_thread.clone();
-                        let parsed_markdown = parsed_markdown.clone();
-                        let code_block_range = metadata.content_range.clone();
-                        move |_event, _window, cx| {
-                            active_thread.update(cx, |this, cx| {
-                                this.copied_code_block_ids.insert((message_id, ix));
-
-                                let code =
-                                    parsed_markdown.source()[code_block_range.clone()].to_string();
-                                cx.write_to_clipboard(ClipboardItem::new_string(code));
-
-                                cx.spawn(async move |this, cx| {
-                                    cx.background_executor().timer(Duration::from_secs(2)).await;
-
-                                    cx.update(|cx| {
-                                        this.update(cx, |this, cx| {
-                                            this.copied_code_block_ids.remove(&(message_id, ix));
-                                            cx.notify();
-                                        })
-                                    })
-                                    .ok();
-                                })
-                                .detach();
-                            });
-                        }
-                    }),
-                )
-                .when(can_expand, |header| {
-                    header.child(
-                        IconButton::new(
-                            ("expand-collapse-code", ix),
-                            if is_expanded {
-                                IconName::ChevronUp
-                            } else {
-                                IconName::ChevronDown
-                            },
-                        )
-                        .icon_color(Color::Muted)
-                        .shape(ui::IconButtonShape::Square)
-                        .tooltip(Tooltip::text(if is_expanded {
-                            "Collapse Code"
-                        } else {
-                            "Expand Code"
-                        }))
-                        .on_click({
-                            let active_thread = active_thread.clone();
-                            move |_event, _window, cx| {
-                                active_thread.update(cx, |this, cx| {
-                                    this.toggle_codeblock_expanded(message_id, ix);
-                                    cx.notify();
-                                });
-                            }
-                        }),
-                    )
-                }),
-        );
+        .child(control_buttons);
 
     v_flex()
         .group(CODEBLOCK_CONTAINER_GROUP)
@@ -598,6 +570,45 @@ fn render_markdown_code_block(
         .when(can_expand && !is_expanded, |this| this.max_h_80())
 }
 
+fn open_path(
+    path_range: &PathWithRange,
+    window: &mut Window,
+    workspace: &mut Workspace,
+    cx: &mut Context<'_, Workspace>,
+) {
+    let Some(project_path) = workspace
+        .project()
+        .read(cx)
+        .find_project_path(&path_range.path, cx)
+    else {
+        return; // TODO instead of just bailing out, open that path in a buffer.
+    };
+
+    let Some(target) = path_range.range.as_ref().map(|range| {
+        Point::new(
+            // Line number is 1-based
+            range.start.line.saturating_sub(1),
+            range.start.col.unwrap_or(0),
+        )
+    }) else {
+        return;
+    };
+    let open_task = workspace.open_path(project_path, None, true, window, cx);
+    window
+        .spawn(cx, async move |cx| {
+            let item = open_task.await?;
+            if let Some(active_editor) = item.downcast::<Editor>() {
+                active_editor
+                    .update_in(cx, |editor, window, cx| {
+                        editor.go_to_singleton_buffer_point(target, window, cx);
+                    })
+                    .ok();
+            }
+            anyhow::Ok(())
+        })
+        .detach_and_log_err(cx);
+}
+
 fn render_code_language(
     language: Option<&Arc<Language>>,
     name_fallback: SharedString,

crates/agent/src/agent.rs

@@ -49,7 +49,7 @@ 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 crate::thread_store::{SerializedThread, TextThreadStore, ThreadStore};
 pub use agent_diff::{AgentDiffPane, AgentDiffToolbar};
 pub use context_store::ContextStore;
 pub use ui::preview::{all_agent_previews, get_agent_preview};

crates/agent/src/agent_panel.rs

@@ -2439,9 +2439,6 @@ impl AgentPanel {
                 .occlude()
                 .child(match last_error {
                     ThreadError::PaymentRequired => self.render_payment_required_error(cx),
-                    ThreadError::MaxMonthlySpendReached => {
-                        self.render_max_monthly_spend_reached_error(cx)
-                    }
                     ThreadError::ModelRequestLimitReached { plan } => {
                         self.render_model_request_limit_reached_error(plan, cx)
                     }
@@ -2501,56 +2498,6 @@ impl AgentPanel {
             .into_any()
     }
 
-    fn render_max_monthly_spend_reached_error(&self, cx: &mut Context<Self>) -> AnyElement {
-        const ERROR_MESSAGE: &str = "You have reached your maximum monthly spend. Increase your spend limit to continue using Zed LLMs.";
-
-        v_flex()
-            .gap_0p5()
-            .child(
-                h_flex()
-                    .gap_1p5()
-                    .items_center()
-                    .child(Icon::new(IconName::XCircle).color(Color::Error))
-                    .child(Label::new("Max Monthly Spend Reached").weight(FontWeight::MEDIUM)),
-            )
-            .child(
-                div()
-                    .id("error-message")
-                    .max_h_24()
-                    .overflow_y_scroll()
-                    .child(Label::new(ERROR_MESSAGE)),
-            )
-            .child(
-                h_flex()
-                    .justify_end()
-                    .mt_1()
-                    .gap_1()
-                    .child(self.create_copy_button(ERROR_MESSAGE))
-                    .child(
-                        Button::new("subscribe", "Update Monthly Spend Limit").on_click(
-                            cx.listener(|this, _, _, cx| {
-                                this.thread.update(cx, |this, _cx| {
-                                    this.clear_last_error();
-                                });
-
-                                cx.open_url(&zed_urls::account_url(cx));
-                                cx.notify();
-                            }),
-                        ),
-                    )
-                    .child(Button::new("dismiss", "Dismiss").on_click(cx.listener(
-                        |this, _, _, cx| {
-                            this.thread.update(cx, |this, _cx| {
-                                this.clear_last_error();
-                            });
-
-                            cx.notify();
-                        },
-                    ))),
-            )
-            .into_any()
-    }
-
     fn render_model_request_limit_reached_error(
         &self,
         plan: Plan,

crates/agent/src/thread.rs

@@ -22,7 +22,7 @@ use language_model::{
     ConfiguredModel, LanguageModel, LanguageModelCompletionError, LanguageModelCompletionEvent,
     LanguageModelId, LanguageModelKnownError, LanguageModelRegistry, LanguageModelRequest,
     LanguageModelRequestMessage, LanguageModelRequestTool, LanguageModelToolResult,
-    LanguageModelToolUseId, MaxMonthlySpendReachedError, MessageContent,
+    LanguageModelToolResultContent, LanguageModelToolUseId, MessageContent,
     ModelRequestLimitReachedError, PaymentRequiredError, RequestUsage, Role, SelectedModel,
     StopReason, TokenUsage,
 };
@@ -458,7 +458,7 @@ impl Thread {
         tools: Entity<ToolWorkingSet>,
         prompt_builder: Arc<PromptBuilder>,
         project_context: SharedProjectContext,
-        window: &mut Window,
+        window: Option<&mut Window>, // None in headless mode
         cx: &mut Context<Self>,
     ) -> Self {
         let next_message_id = MessageId(
@@ -880,7 +880,13 @@ impl Thread {
     }
 
     pub fn output_for_tool(&self, id: &LanguageModelToolUseId) -> Option<&Arc<str>> {
-        Some(&self.tool_use.tool_result(id)?.content)
+        match &self.tool_use.tool_result(id)?.content {
+            LanguageModelToolResultContent::Text(str) => Some(str),
+            LanguageModelToolResultContent::Image(_) => {
+                // TODO: We should display image
+                None
+            }
+        }
     }
 
     pub fn card_for_tool(&self, id: &LanguageModelToolUseId) -> Option<AnyToolCard> {
@@ -1682,10 +1688,6 @@ impl Thread {
 
                             if error.is::<PaymentRequiredError>() {
                                 cx.emit(ThreadEvent::ShowError(ThreadError::PaymentRequired));
-                            } else if error.is::<MaxMonthlySpendReachedError>() {
-                                cx.emit(ThreadEvent::ShowError(
-                                    ThreadError::MaxMonthlySpendReached,
-                                ));
                             } else if let Some(error) =
                                 error.downcast_ref::<ModelRequestLimitReachedError>()
                             {
@@ -2502,7 +2504,15 @@ impl Thread {
                 }
 
                 writeln!(markdown, "**\n")?;
-                writeln!(markdown, "{}", tool_result.content)?;
+                match &tool_result.content {
+                    LanguageModelToolResultContent::Text(str) => {
+                        writeln!(markdown, "{}", str)?;
+                    }
+                    LanguageModelToolResultContent::Image(image) => {
+                        writeln!(markdown, "![Image](data:base64,{})", image.source)?;
+                    }
+                }
+
                 if let Some(output) = tool_result.output.as_ref() {
                     writeln!(
                         markdown,
@@ -2692,8 +2702,6 @@ impl Thread {
 pub enum ThreadError {
     #[error("Payment required")]
     PaymentRequired,
-    #[error("Max monthly spend reached")]
-    MaxMonthlySpendReached,
     #[error("Model request limit reached")]
     ModelRequestLimitReached { plan: Plan },
     #[error("Message {header}: {message}")]

crates/agent/src/thread_store.rs

@@ -19,7 +19,7 @@ use gpui::{
 };
 use heed::Database;
 use heed::types::SerdeBincode;
-use language_model::{LanguageModelToolUseId, Role, TokenUsage};
+use language_model::{LanguageModelToolResultContent, LanguageModelToolUseId, Role, TokenUsage};
 use project::context_server_store::{ContextServerStatus, ContextServerStore};
 use project::{Project, ProjectItem, ProjectPath, Worktree};
 use prompt_store::{
@@ -386,6 +386,25 @@ impl ThreadStore {
         })
     }
 
+    pub fn create_thread_from_serialized(
+        &mut self,
+        serialized: SerializedThread,
+        cx: &mut Context<Self>,
+    ) -> Entity<Thread> {
+        cx.new(|cx| {
+            Thread::deserialize(
+                ThreadId::new(),
+                serialized,
+                self.project.clone(),
+                self.tools.clone(),
+                self.prompt_builder.clone(),
+                self.project_context.clone(),
+                None,
+                cx,
+            )
+        })
+    }
+
     pub fn open_thread(
         &self,
         id: &ThreadId,
@@ -411,7 +430,7 @@ impl ThreadStore {
                         this.tools.clone(),
                         this.prompt_builder.clone(),
                         this.project_context.clone(),
-                        window,
+                        Some(window),
                         cx,
                     )
                 })
@@ -775,7 +794,7 @@ pub struct SerializedToolUse {
 pub struct SerializedToolResult {
     pub tool_use_id: LanguageModelToolUseId,
     pub is_error: bool,
-    pub content: Arc<str>,
+    pub content: LanguageModelToolResultContent,
     pub output: Option<serde_json::Value>,
 }
 

crates/agent/src/tool_use.rs

@@ -1,14 +1,16 @@
 use std::sync::Arc;
 
 use anyhow::Result;
-use assistant_tool::{AnyToolCard, Tool, ToolResultOutput, ToolUseStatus, ToolWorkingSet};
+use assistant_tool::{
+    AnyToolCard, Tool, ToolResultContent, 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, LanguageModelRequest, LanguageModelToolResult,
-    LanguageModelToolUse, LanguageModelToolUseId, Role,
+    LanguageModelToolResultContent, LanguageModelToolUse, LanguageModelToolUseId, Role,
 };
 use project::Project;
 use ui::{IconName, Window};
@@ -52,15 +54,19 @@ impl ToolUseState {
     /// Constructs a [`ToolUseState`] from the given list of [`SerializedMessage`]s.
     ///
     /// Accepts a function to filter the tools that should be used to populate the state.
+    ///
+    /// If `window` is `None` (e.g., when in headless mode or when running evals),
+    /// tool cards won't be deserialized
     pub fn from_serialized_messages(
         tools: Entity<ToolWorkingSet>,
         messages: &[SerializedMessage],
         project: Entity<Project>,
-        window: &mut Window,
+        window: Option<&mut Window>, // None in headless mode
         cx: &mut App,
     ) -> Self {
         let mut this = Self::new(tools);
         let mut tool_names_by_id = HashMap::default();
+        let mut window = window;
 
         for message in messages {
             match message.role {
@@ -105,12 +111,17 @@ impl ToolUseState {
                                 },
                             );
 
-                            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);
+                            if let Some(window) = &mut window {
+                                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);
+                                        }
                                     }
                                 }
                             }
@@ -165,10 +176,16 @@ impl ToolUseState {
 
             let status = (|| {
                 if let Some(tool_result) = tool_result {
+                    let content = tool_result
+                        .content
+                        .to_str()
+                        .map(|str| str.to_owned().into())
+                        .unwrap_or_default();
+
                     return if tool_result.is_error {
-                        ToolUseStatus::Error(tool_result.content.clone().into())
+                        ToolUseStatus::Error(content)
                     } else {
-                        ToolUseStatus::Finished(tool_result.content.clone().into())
+                        ToolUseStatus::Finished(content)
                     };
                 }
 
@@ -399,21 +416,44 @@ impl ToolUseState {
                 let tool_result = output.content;
                 const BYTES_PER_TOKEN_ESTIMATE: usize = 3;
 
-                // Protect from clearly large output
+                let old_use = self.pending_tool_uses_by_id.remove(&tool_use_id);
+
+                // Protect from overly large output
                 let tool_output_limit = configured_model
                     .map(|model| model.model.max_token_count() * BYTES_PER_TOKEN_ESTIMATE)
                     .unwrap_or(usize::MAX);
 
-                let tool_result = if tool_result.len() <= tool_output_limit {
-                    tool_result
-                } else {
-                    let truncated = truncate_lines_to_byte_limit(&tool_result, tool_output_limit);
+                let content = match tool_result {
+                    ToolResultContent::Text(text) => {
+                        let truncated = truncate_lines_to_byte_limit(&text, tool_output_limit);
 
-                    format!(
-                        "Tool result too long. The first {} bytes:\n\n{}",
-                        truncated.len(),
-                        truncated
-                    )
+                        LanguageModelToolResultContent::Text(
+                            format!(
+                                "Tool result too long. The first {} bytes:\n\n{}",
+                                truncated.len(),
+                                truncated
+                            )
+                            .into(),
+                        )
+                    }
+                    ToolResultContent::Image(language_model_image) => {
+                        if language_model_image.estimate_tokens() < tool_output_limit {
+                            LanguageModelToolResultContent::Image(language_model_image)
+                        } else {
+                            self.tool_results.insert(
+                                tool_use_id.clone(),
+                                LanguageModelToolResult {
+                                    tool_use_id: tool_use_id.clone(),
+                                    tool_name,
+                                    content: "Tool responded with an image that would exceeded the remaining tokens".into(),
+                                    is_error: true,
+                                    output: None,
+                                },
+                            );
+
+                            return old_use;
+                        }
+                    }
                 };
 
                 self.tool_results.insert(
@@ -421,12 +461,13 @@ impl ToolUseState {
                     LanguageModelToolResult {
                         tool_use_id: tool_use_id.clone(),
                         tool_name,
-                        content: tool_result.into(),
+                        content,
                         is_error: false,
                         output: output.output,
                     },
                 );
-                self.pending_tool_uses_by_id.remove(&tool_use_id)
+
+                old_use
             }
             Err(err) => {
                 self.tool_results.insert(
@@ -434,7 +475,7 @@ impl ToolUseState {
                     LanguageModelToolResult {
                         tool_use_id: tool_use_id.clone(),
                         tool_name,
-                        content: err.to_string().into(),
+                        content: LanguageModelToolResultContent::Text(err.to_string().into()),
                         is_error: true,
                         output: None,
                     },

crates/anthropic/src/anthropic.rs

@@ -534,12 +534,26 @@ pub enum RequestContent {
     ToolResult {
         tool_use_id: String,
         is_error: bool,
-        content: String,
+        content: ToolResultContent,
         #[serde(skip_serializing_if = "Option::is_none")]
         cache_control: Option<CacheControl>,
     },
 }
 
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum ToolResultContent {
+    Plain(String),
+    Multipart(Vec<ToolResultPart>),
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "lowercase")]
+pub enum ToolResultPart {
+    Text { text: String },
+    Image { source: ImageSource },
+}
+
 #[derive(Debug, Serialize, Deserialize)]
 #[serde(tag = "type")]
 pub enum ResponseContent {

crates/assistant_context_editor/src/context.rs

@@ -21,8 +21,8 @@ use language::{AnchorRangeExt, Bias, Buffer, LanguageRegistry, OffsetRangeExt, P
 use language_model::{
     LanguageModel, LanguageModelCacheConfiguration, LanguageModelCompletionEvent,
     LanguageModelImage, LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage,
-    LanguageModelToolUseId, MaxMonthlySpendReachedError, MessageContent, PaymentRequiredError,
-    Role, StopReason, report_assistant_event,
+    LanguageModelToolUseId, MessageContent, PaymentRequiredError, Role, StopReason,
+    report_assistant_event,
 };
 use open_ai::Model as OpenAiModel;
 use paths::contexts_dir;
@@ -447,7 +447,6 @@ impl ContextOperation {
 pub enum ContextEvent {
     ShowAssistError(SharedString),
     ShowPaymentRequiredError,
-    ShowMaxMonthlySpendReachedError,
     MessagesEdited,
     SummaryChanged,
     SummaryGenerated,
@@ -2155,12 +2154,6 @@ impl AssistantContext {
                                 metadata.status = MessageStatus::Canceled;
                             });
                             Some(error.to_string())
-                        } else if error.is::<MaxMonthlySpendReachedError>() {
-                            cx.emit(ContextEvent::ShowMaxMonthlySpendReachedError);
-                            this.update_metadata(assistant_message_id, cx, |metadata| {
-                                metadata.status = MessageStatus::Canceled;
-                            });
-                            Some(error.to_string())
                         } else {
                             let error_message = error
                                 .chain()

crates/assistant_context_editor/src/context_editor.rs

@@ -114,7 +114,6 @@ type MessageHeader = MessageMetadata;
 #[derive(Clone)]
 enum AssistError {
     PaymentRequired,
-    MaxMonthlySpendReached,
     Message(SharedString),
 }
 
@@ -732,9 +731,6 @@ impl ContextEditor {
             ContextEvent::ShowPaymentRequiredError => {
                 self.last_error = Some(AssistError::PaymentRequired);
             }
-            ContextEvent::ShowMaxMonthlySpendReachedError => {
-                self.last_error = Some(AssistError::MaxMonthlySpendReached);
-            }
         }
     }
 
@@ -1594,7 +1590,7 @@ impl ContextEditor {
         &mut self,
         cx: &mut Context<Self>,
     ) -> (String, CopyMetadata, Vec<text::Selection<usize>>) {
-        let (selection, creases) = self.editor.update(cx, |editor, cx| {
+        let (mut selection, creases) = self.editor.update(cx, |editor, cx| {
             let mut selection = editor.selections.newest_adjusted(cx);
             let snapshot = editor.buffer().read(cx).snapshot(cx);
 
@@ -1652,7 +1648,18 @@ impl ContextEditor {
             } else if message.offset_range.end >= selection.range().start {
                 let range = cmp::max(message.offset_range.start, selection.range().start)
                     ..cmp::min(message.offset_range.end, selection.range().end);
-                if !range.is_empty() {
+                if range.is_empty() {
+                    let snapshot = context.buffer().read(cx).snapshot();
+                    let point = snapshot.offset_to_point(range.start);
+                    selection.start = snapshot.point_to_offset(Point::new(point.row, 0));
+                    selection.end = snapshot.point_to_offset(cmp::min(
+                        Point::new(point.row + 1, 0),
+                        snapshot.max_point(),
+                    ));
+                    for chunk in context.buffer().read(cx).text_for_range(selection.range()) {
+                        text.push_str(chunk);
+                    }
+                } else {
                     for chunk in context.buffer().read(cx).text_for_range(range) {
                         text.push_str(chunk);
                     }
@@ -2107,9 +2114,6 @@ impl ContextEditor {
                 .occlude()
                 .child(match last_error {
                     AssistError::PaymentRequired => self.render_payment_required_error(cx),
-                    AssistError::MaxMonthlySpendReached => {
-                        self.render_max_monthly_spend_reached_error(cx)
-                    }
                     AssistError::Message(error_message) => {
                         self.render_assist_error(error_message, cx)
                     }
@@ -2158,48 +2162,6 @@ impl ContextEditor {
             .into_any()
     }
 
-    fn render_max_monthly_spend_reached_error(&self, cx: &mut Context<Self>) -> AnyElement {
-        const ERROR_MESSAGE: &str = "You have reached your maximum monthly spend. Increase your spend limit to continue using Zed LLMs.";
-
-        v_flex()
-            .gap_0p5()
-            .child(
-                h_flex()
-                    .gap_1p5()
-                    .items_center()
-                    .child(Icon::new(IconName::XCircle).color(Color::Error))
-                    .child(Label::new("Max Monthly Spend Reached").weight(FontWeight::MEDIUM)),
-            )
-            .child(
-                div()
-                    .id("error-message")
-                    .max_h_24()
-                    .overflow_y_scroll()
-                    .child(Label::new(ERROR_MESSAGE)),
-            )
-            .child(
-                h_flex()
-                    .justify_end()
-                    .mt_1()
-                    .child(
-                        Button::new("subscribe", "Update Monthly Spend Limit").on_click(
-                            cx.listener(|this, _, _window, cx| {
-                                this.last_error = None;
-                                cx.open_url(&zed_urls::account_url(cx));
-                                cx.notify();
-                            }),
-                        ),
-                    )
-                    .child(Button::new("dismiss", "Dismiss").on_click(cx.listener(
-                        |this, _, _window, cx| {
-                            this.last_error = None;
-                            cx.notify();
-                        },
-                    ))),
-            )
-            .into_any()
-    }
-
     fn render_assist_error(
         &self,
         error_message: &SharedString,
@@ -3251,9 +3213,77 @@ pub fn make_lsp_adapter_delegate(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use gpui::App;
-    use language::Buffer;
+    use fs::FakeFs;
+    use gpui::{App, TestAppContext, VisualTestContext};
+    use language::{Buffer, LanguageRegistry};
+    use prompt_store::PromptBuilder;
     use unindent::Unindent;
+    use util::path;
+
+    #[gpui::test]
+    async fn test_copy_paste_no_selection(cx: &mut TestAppContext) {
+        cx.update(init_test);
+
+        let fs = FakeFs::new(cx.executor());
+        let registry = Arc::new(LanguageRegistry::test(cx.executor()));
+        let prompt_builder = Arc::new(PromptBuilder::new(None).unwrap());
+        let context = cx.new(|cx| {
+            AssistantContext::local(
+                registry,
+                None,
+                None,
+                prompt_builder.clone(),
+                Arc::new(SlashCommandWorkingSet::default()),
+                cx,
+            )
+        });
+        let project = Project::test(fs.clone(), [path!("/test").as_ref()], cx).await;
+        let window = cx.add_window(|window, cx| Workspace::test_new(project.clone(), window, cx));
+        let workspace = window.root(cx).unwrap();
+        let cx = &mut VisualTestContext::from_window(*window, cx);
+
+        let context_editor = window
+            .update(cx, |_, window, cx| {
+                cx.new(|cx| {
+                    ContextEditor::for_context(
+                        context,
+                        fs,
+                        workspace.downgrade(),
+                        project,
+                        None,
+                        window,
+                        cx,
+                    )
+                })
+            })
+            .unwrap();
+
+        context_editor.update_in(cx, |context_editor, window, cx| {
+            context_editor.editor.update(cx, |editor, cx| {
+                editor.set_text("abc\ndef\nghi", window, cx);
+                editor.move_to_beginning(&Default::default(), window, cx);
+            })
+        });
+
+        context_editor.update_in(cx, |context_editor, window, cx| {
+            context_editor.editor.update(cx, |editor, cx| {
+                editor.copy(&Default::default(), window, cx);
+                editor.paste(&Default::default(), window, cx);
+
+                assert_eq!(editor.text(cx), "abc\nabc\ndef\nghi");
+            })
+        });
+
+        context_editor.update_in(cx, |context_editor, window, cx| {
+            context_editor.editor.update(cx, |editor, cx| {
+                editor.cut(&Default::default(), window, cx);
+                assert_eq!(editor.text(cx), "abc\ndef\nghi");
+
+                editor.paste(&Default::default(), window, cx);
+                assert_eq!(editor.text(cx), "abc\nabc\ndef\nghi");
+            })
+        });
+    }
 
     #[gpui::test]
     fn test_find_code_blocks(cx: &mut App) {
@@ -3328,4 +3358,17 @@ mod tests {
             assert_eq!(range, expected, "unexpected result on row {:?}", row);
         }
     }
+
+    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);
+        theme::init(theme::LoadThemes::JustBase, cx);
+        workspace::init_settings(cx);
+        editor::init_settings(cx);
+    }
 }

crates/assistant_tool/src/action_log.rs

@@ -49,6 +49,37 @@ impl ActionLog {
         is_created: bool,
         cx: &mut Context<Self>,
     ) -> &mut TrackedBuffer {
+        let status = if is_created {
+            if let Some(tracked) = self.tracked_buffers.remove(&buffer) {
+                match tracked.status {
+                    TrackedBufferStatus::Created {
+                        existing_file_content,
+                    } => TrackedBufferStatus::Created {
+                        existing_file_content,
+                    },
+                    TrackedBufferStatus::Modified | TrackedBufferStatus::Deleted => {
+                        TrackedBufferStatus::Created {
+                            existing_file_content: Some(tracked.diff_base),
+                        }
+                    }
+                }
+            } else if buffer
+                .read(cx)
+                .file()
+                .map_or(false, |file| file.disk_state().exists())
+            {
+                TrackedBufferStatus::Created {
+                    existing_file_content: Some(buffer.read(cx).as_rope().clone()),
+                }
+            } else {
+                TrackedBufferStatus::Created {
+                    existing_file_content: None,
+                }
+            }
+        } else {
+            TrackedBufferStatus::Modified
+        };
+
         let tracked_buffer = self
             .tracked_buffers
             .entry(buffer.clone())
@@ -60,36 +91,21 @@ impl ActionLog {
                 let text_snapshot = buffer.read(cx).text_snapshot();
                 let diff = cx.new(|cx| BufferDiff::new(&text_snapshot, cx));
                 let (diff_update_tx, diff_update_rx) = mpsc::unbounded();
-                let base_text;
-                let status;
+                let diff_base;
                 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 {
-                        existing_file_content,
-                    };
+                    diff_base = Rope::default();
                     unreviewed_changes = Patch::new(vec![Edit {
                         old: 0..1,
                         new: 0..text_snapshot.max_point().row + 1,
                     }])
                 } else {
-                    base_text = buffer.read(cx).as_rope().clone();
-                    status = TrackedBufferStatus::Modified;
+                    diff_base = buffer.read(cx).as_rope().clone();
                     unreviewed_changes = Patch::default();
                 }
                 TrackedBuffer {
                     buffer: buffer.clone(),
-                    base_text,
+                    diff_base,
                     unreviewed_changes,
                     snapshot: text_snapshot.clone(),
                     status,
@@ -184,7 +200,7 @@ impl ActionLog {
                         .context("buffer not tracked")?;
 
                     let rebase = cx.background_spawn({
-                        let mut base_text = tracked_buffer.base_text.clone();
+                        let mut base_text = tracked_buffer.diff_base.clone();
                         let old_snapshot = tracked_buffer.snapshot.clone();
                         let new_snapshot = buffer_snapshot.clone();
                         let unreviewed_changes = tracked_buffer.unreviewed_changes.clone();
@@ -210,7 +226,7 @@ impl ActionLog {
                     ))
                 })??;
 
-            let (new_base_text, new_base_text_rope) = rebase.await;
+            let (new_base_text, new_diff_base) = rebase.await;
             let diff_snapshot = BufferDiff::update_diff(
                 diff.clone(),
                 buffer_snapshot.clone(),
@@ -229,24 +245,23 @@ impl ActionLog {
                     .background_spawn({
                         let diff_snapshot = diff_snapshot.clone();
                         let buffer_snapshot = buffer_snapshot.clone();
-                        let new_base_text_rope = new_base_text_rope.clone();
+                        let new_diff_base = new_diff_base.clone();
                         async move {
                             let mut unreviewed_changes = Patch::default();
                             for hunk in diff_snapshot.hunks_intersecting_range(
                                 Anchor::MIN..Anchor::MAX,
                                 &buffer_snapshot,
                             ) {
-                                let old_range = new_base_text_rope
+                                let old_range = new_diff_base
                                     .offset_to_point(hunk.diff_base_byte_range.start)
-                                    ..new_base_text_rope
-                                        .offset_to_point(hunk.diff_base_byte_range.end);
+                                    ..new_diff_base.offset_to_point(hunk.diff_base_byte_range.end);
                                 let new_range = hunk.range.start..hunk.range.end;
                                 unreviewed_changes.push(point_to_row_edit(
                                     Edit {
                                         old: old_range,
                                         new: new_range,
                                     },
-                                    &new_base_text_rope,
+                                    &new_diff_base,
                                     &buffer_snapshot.as_rope(),
                                 ));
                             }
@@ -264,7 +279,7 @@ impl ActionLog {
                     .tracked_buffers
                     .get_mut(&buffer)
                     .context("buffer not tracked")?;
-                tracked_buffer.base_text = new_base_text_rope;
+                tracked_buffer.diff_base = new_diff_base;
                 tracked_buffer.snapshot = buffer_snapshot;
                 tracked_buffer.unreviewed_changes = unreviewed_changes;
                 cx.notify();
@@ -283,7 +298,6 @@ impl ActionLog {
     /// Mark a buffer as edited, so we can refresh it in the context
     pub fn buffer_created(&mut self, buffer: Entity<Buffer>, cx: &mut Context<Self>) {
         self.edited_since_project_diagnostics_check = true;
-        self.tracked_buffers.remove(&buffer);
         self.track_buffer_internal(buffer.clone(), true, cx);
     }
 
@@ -346,11 +360,11 @@ impl ActionLog {
                         true
                     } else {
                         let old_range = tracked_buffer
-                            .base_text
+                            .diff_base
                             .point_to_offset(Point::new(edit.old.start, 0))
-                            ..tracked_buffer.base_text.point_to_offset(cmp::min(
+                            ..tracked_buffer.diff_base.point_to_offset(cmp::min(
                                 Point::new(edit.old.end, 0),
-                                tracked_buffer.base_text.max_point(),
+                                tracked_buffer.diff_base.max_point(),
                             ));
                         let new_range = tracked_buffer
                             .snapshot
@@ -359,7 +373,7 @@ impl ActionLog {
                                 Point::new(edit.new.end, 0),
                                 tracked_buffer.snapshot.max_point(),
                             ));
-                        tracked_buffer.base_text.replace(
+                        tracked_buffer.diff_base.replace(
                             old_range,
                             &tracked_buffer
                                 .snapshot
@@ -417,7 +431,7 @@ impl ActionLog {
             }
             TrackedBufferStatus::Deleted => {
                 buffer.update(cx, |buffer, cx| {
-                    buffer.set_text(tracked_buffer.base_text.to_string(), cx)
+                    buffer.set_text(tracked_buffer.diff_base.to_string(), cx)
                 });
                 let save = self
                     .project
@@ -464,14 +478,14 @@ impl ActionLog {
 
                         if revert {
                             let old_range = tracked_buffer
-                                .base_text
+                                .diff_base
                                 .point_to_offset(Point::new(edit.old.start, 0))
-                                ..tracked_buffer.base_text.point_to_offset(cmp::min(
+                                ..tracked_buffer.diff_base.point_to_offset(cmp::min(
                                     Point::new(edit.old.end, 0),
-                                    tracked_buffer.base_text.max_point(),
+                                    tracked_buffer.diff_base.max_point(),
                                 ));
                             let old_text = tracked_buffer
-                                .base_text
+                                .diff_base
                                 .chunks_in_range(old_range)
                                 .collect::<String>();
                             edits_to_revert.push((new_range, old_text));
@@ -492,7 +506,7 @@ impl ActionLog {
                 TrackedBufferStatus::Deleted => false,
                 _ => {
                     tracked_buffer.unreviewed_changes.clear();
-                    tracked_buffer.base_text = tracked_buffer.snapshot.as_rope().clone();
+                    tracked_buffer.diff_base = tracked_buffer.snapshot.as_rope().clone();
                     tracked_buffer.schedule_diff_update(ChangeAuthor::User, cx);
                     true
                 }
@@ -655,7 +669,7 @@ enum TrackedBufferStatus {
 
 struct TrackedBuffer {
     buffer: Entity<Buffer>,
-    base_text: Rope,
+    diff_base: Rope,
     unreviewed_changes: Patch<u32>,
     status: TrackedBufferStatus,
     version: clock::Global,
@@ -1094,6 +1108,86 @@ mod tests {
         );
     }
 
+    #[gpui::test(iterations = 10)]
+    async fn test_overwriting_previously_edited_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_read(buffer.clone(), cx));
+            buffer.update(cx, |buffer, cx| buffer.append(" 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, 37),
+                    diff_status: DiffHunkStatusKind::Modified,
+                    old_text: "Lorem ipsum dolor".into(),
+                }],
+            )]
+        );
+
+        cx.update(|cx| {
+            action_log.update(cx, |log, cx| log.buffer_created(buffer.clone(), cx));
+            buffer.update(cx, |buffer, cx| buffer.set_text("rewritten", 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, 9),
+                    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);
@@ -1601,7 +1695,7 @@ mod tests {
             cx.run_until_parked();
             action_log.update(cx, |log, cx| {
                 let tracked_buffer = log.tracked_buffers.get(&buffer).unwrap();
-                let mut old_text = tracked_buffer.base_text.clone();
+                let mut old_text = tracked_buffer.diff_base.clone();
                 let new_text = buffer.read(cx).as_rope();
                 for edit in tracked_buffer.unreviewed_changes.edits() {
                     let old_start = old_text.point_to_offset(Point::new(edit.new.start, 0));

crates/assistant_tool/src/assistant_tool.rs

@@ -19,6 +19,7 @@ use gpui::Window;
 use gpui::{App, Entity, SharedString, Task, WeakEntity};
 use icons::IconName;
 use language_model::LanguageModel;
+use language_model::LanguageModelImage;
 use language_model::LanguageModelRequest;
 use language_model::LanguageModelToolSchemaFormat;
 use project::Project;
@@ -65,21 +66,50 @@ impl ToolUseStatus {
 
 #[derive(Debug)]
 pub struct ToolResultOutput {
-    pub content: String,
+    pub content: ToolResultContent,
     pub output: Option<serde_json::Value>,
 }
 
+#[derive(Debug, PartialEq, Eq)]
+pub enum ToolResultContent {
+    Text(String),
+    Image(LanguageModelImage),
+}
+
+impl ToolResultContent {
+    pub fn len(&self) -> usize {
+        match self {
+            ToolResultContent::Text(str) => str.len(),
+            ToolResultContent::Image(image) => image.len(),
+        }
+    }
+
+    pub fn is_empty(&self) -> bool {
+        match self {
+            ToolResultContent::Text(str) => str.is_empty(),
+            ToolResultContent::Image(image) => image.is_empty(),
+        }
+    }
+
+    pub fn as_str(&self) -> Option<&str> {
+        match self {
+            ToolResultContent::Text(str) => Some(str),
+            ToolResultContent::Image(_) => None,
+        }
+    }
+}
+
 impl From<String> for ToolResultOutput {
     fn from(value: String) -> Self {
         ToolResultOutput {
-            content: value,
+            content: ToolResultContent::Text(value),
             output: None,
         }
     }
 }
 
 impl Deref for ToolResultOutput {
-    type Target = String;
+    type Target = ToolResultContent;
 
     fn deref(&self) -> &Self::Target {
         &self.content

crates/assistant_tools/src/assistant_tools.rs

@@ -42,7 +42,7 @@ use crate::list_directory_tool::ListDirectoryTool;
 use crate::now_tool::NowTool;
 use crate::thinking_tool::ThinkingTool;
 
-pub use edit_file_tool::EditFileToolInput;
+pub use edit_file_tool::{EditFileMode, EditFileToolInput};
 pub use find_path_tool::FindPathToolInput;
 pub use open_tool::OpenTool;
 pub use read_file_tool::{ReadFileTool, ReadFileToolInput};

crates/assistant_tools/src/edit_agent/evals.rs

@@ -1,5 +1,9 @@
 use super::*;
-use crate::{ReadFileToolInput, edit_file_tool::EditFileToolInput, grep_tool::GrepToolInput};
+use crate::{
+    ReadFileToolInput,
+    edit_file_tool::{EditFileMode, EditFileToolInput},
+    grep_tool::GrepToolInput,
+};
 use Role::*;
 use anyhow::anyhow;
 use assistant_tool::ToolRegistry;
@@ -10,8 +14,8 @@ use futures::{FutureExt, future::LocalBoxFuture};
 use gpui::{AppContext, TestAppContext};
 use indoc::{formatdoc, indoc};
 use language_model::{
-    LanguageModelRegistry, LanguageModelRequestTool, LanguageModelToolResult, LanguageModelToolUse,
-    LanguageModelToolUseId,
+    LanguageModelRegistry, LanguageModelRequestTool, LanguageModelToolResult,
+    LanguageModelToolResultContent, LanguageModelToolUse, LanguageModelToolUseId,
 };
 use project::Project;
 use rand::prelude::*;
@@ -71,7 +75,7 @@ fn eval_extract_handle_command_output() {
                         EditFileToolInput {
                             display_description: edit_description.into(),
                             path: input_file_path.into(),
-                            create_or_overwrite: false,
+                            mode: EditFileMode::Edit,
                         },
                     )],
                 ),
@@ -127,7 +131,7 @@ fn eval_delete_run_git_blame() {
                         EditFileToolInput {
                             display_description: edit_description.into(),
                             path: input_file_path.into(),
-                            create_or_overwrite: false,
+                            mode: EditFileMode::Edit,
                         },
                     )],
                 ),
@@ -182,7 +186,7 @@ fn eval_translate_doc_comments() {
                         EditFileToolInput {
                             display_description: edit_description.into(),
                             path: input_file_path.into(),
-                            create_or_overwrite: false,
+                            mode: EditFileMode::Edit,
                         },
                     )],
                 ),
@@ -297,7 +301,7 @@ fn eval_use_wasi_sdk_in_compile_parser_to_wasm() {
                         EditFileToolInput {
                             display_description: edit_description.into(),
                             path: input_file_path.into(),
-                            create_or_overwrite: false,
+                            mode: EditFileMode::Edit,
                         },
                     )],
                 ),
@@ -372,7 +376,7 @@ fn eval_disable_cursor_blinking() {
                         EditFileToolInput {
                             display_description: edit_description.into(),
                             path: input_file_path.into(),
-                            create_or_overwrite: false,
+                            mode: EditFileMode::Edit,
                         },
                     )],
                 ),
@@ -566,7 +570,7 @@ fn eval_from_pixels_constructor() {
                         EditFileToolInput {
                             display_description: edit_description.into(),
                             path: input_file_path.into(),
-                            create_or_overwrite: false,
+                            mode: EditFileMode::Edit,
                         },
                     )],
                 ),
@@ -643,7 +647,7 @@ fn eval_zode() {
                             EditFileToolInput {
                                 display_description: edit_description.into(),
                                 path: input_file_path.into(),
-                                create_or_overwrite: true,
+                                mode: EditFileMode::Create,
                             },
                         ),
                     ],
@@ -888,7 +892,7 @@ fn eval_add_overwrite_test() {
                             EditFileToolInput {
                                 display_description: edit_description.into(),
                                 path: input_file_path.into(),
-                                create_or_overwrite: false,
+                                mode: EditFileMode::Edit,
                             },
                         ),
                     ],
@@ -951,7 +955,7 @@ fn tool_result(
         tool_use_id: LanguageModelToolUseId::from(id.into()),
         tool_name: name.into(),
         is_error: false,
-        content: result.into(),
+        content: LanguageModelToolResultContent::Text(result.into()),
         output: None,
     })
 }

crates/assistant_tools/src/edit_file_tool.rs

@@ -5,7 +5,8 @@ use crate::{
 };
 use anyhow::{Result, anyhow};
 use assistant_tool::{
-    ActionLog, AnyToolCard, Tool, ToolCard, ToolResult, ToolResultOutput, ToolUseStatus,
+    ActionLog, AnyToolCard, Tool, ToolCard, ToolResult, ToolResultContent, ToolResultOutput,
+    ToolUseStatus,
 };
 use buffer_diff::{BufferDiff, BufferDiffSnapshot};
 use editor::{Editor, EditorMode, MultiBuffer, PathKey};
@@ -75,12 +76,22 @@ pub struct EditFileToolInput {
     /// </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.
+    /// The mode of operation on the file. Possible values:
+    /// - 'edit': Make granular edits to an existing file.
+    /// - 'create': Create a new file if it doesn't exist.
+    /// - 'overwrite': Replace the entire contents of an existing file.
     ///
-    /// When a file already exists or you just created it, always prefer editing
+    /// When a file already exists or you just created it, prefer editing
     /// it as opposed to recreating it from scratch.
-    pub create_or_overwrite: bool,
+    pub mode: EditFileMode,
+}
+
+#[derive(Debug, Serialize, Deserialize, JsonSchema)]
+#[serde(rename_all = "lowercase")]
+pub enum EditFileMode {
+    Edit,
+    Create,
+    Overwrite,
 }
 
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
@@ -194,7 +205,11 @@ impl Tool for EditFileTool {
                     .as_ref()
                     .map_or(false, |file| file.disk_state().exists())
             })?;
-            if !input.create_or_overwrite && !exists {
+            let create_or_overwrite = match input.mode {
+                EditFileMode::Create | EditFileMode::Overwrite => true,
+                _ => false,
+            };
+            if !create_or_overwrite && !exists {
                 return Err(anyhow!("{} not found", input.path.display()));
             }
 
@@ -206,7 +221,7 @@ impl Tool for EditFileTool {
                 })
                 .await;
 
-            let (output, mut events) = if input.create_or_overwrite {
+            let (output, mut events) = if create_or_overwrite {
                 edit_agent.overwrite(
                     buffer.clone(),
                     input.display_description.clone(),
@@ -292,7 +307,10 @@ impl Tool for EditFileTool {
                 }
             } else {
                 Ok(ToolResultOutput {
-                    content: format!("Edited {}:\n\n```diff\n{}\n```", input_path, diff),
+                    content: ToolResultContent::Text(format!(
+                        "Edited {}:\n\n```diff\n{}\n```",
+                        input_path, diff
+                    )),
                     output: serde_json::to_value(output).ok(),
                 })
             }
@@ -872,7 +890,7 @@ mod tests {
                 let input = serde_json::to_value(EditFileToolInput {
                     display_description: "Some edit".into(),
                     path: "root/nonexistent_file.txt".into(),
-                    create_or_overwrite: false,
+                    mode: EditFileMode::Edit,
                 })
                 .unwrap();
                 Arc::new(EditFileTool)

crates/assistant_tools/src/find_path_tool.rs

@@ -1,6 +1,8 @@
 use crate::{schema::json_schema_for, ui::ToolCallCardHeader};
 use anyhow::{Result, anyhow};
-use assistant_tool::{ActionLog, Tool, ToolCard, ToolResult, ToolResultOutput, ToolUseStatus};
+use assistant_tool::{
+    ActionLog, Tool, ToolCard, ToolResult, ToolResultContent, ToolResultOutput, ToolUseStatus,
+};
 use editor::Editor;
 use futures::channel::oneshot::{self, Receiver};
 use gpui::{
@@ -126,7 +128,7 @@ impl Tool for FindPathTool {
                     write!(&mut message, "\n{}", mat.display()).unwrap();
                 }
                 Ok(ToolResultOutput {
-                    content: message,
+                    content: ToolResultContent::Text(message),
                     output: Some(serde_json::to_value(output)?),
                 })
             }

crates/assistant_tools/src/grep_tool.rs

@@ -752,9 +752,9 @@ mod tests {
         match task.output.await {
             Ok(result) => {
                 if cfg!(windows) {
-                    result.content.replace("root\\", "root/")
+                    result.content.as_str().unwrap().replace("root\\", "root/")
                 } else {
-                    result.content
+                    result.content.as_str().unwrap().to_string()
                 }
             }
             Err(e) => panic!("Failed to run grep tool: {}", e),

crates/assistant_tools/src/read_file_tool.rs

@@ -1,13 +1,17 @@
 use crate::schema::json_schema_for;
 use anyhow::{Result, anyhow};
-use assistant_tool::outline;
 use assistant_tool::{ActionLog, Tool, ToolResult};
+use assistant_tool::{ToolResultContent, outline};
 use gpui::{AnyWindowHandle, App, Entity, Task};
+use project::{ImageItem, image_store};
 
+use assistant_tool::ToolResultOutput;
 use indoc::formatdoc;
 use itertools::Itertools;
 use language::{Anchor, Point};
-use language_model::{LanguageModel, LanguageModelRequest, LanguageModelToolSchemaFormat};
+use language_model::{
+    LanguageModel, LanguageModelImage, LanguageModelRequest, LanguageModelToolSchemaFormat,
+};
 use project::{AgentLocation, Project};
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
@@ -86,7 +90,7 @@ impl Tool for ReadFileTool {
         _request: Arc<LanguageModelRequest>,
         project: Entity<Project>,
         action_log: Entity<ActionLog>,
-        _model: Arc<dyn LanguageModel>,
+        model: Arc<dyn LanguageModel>,
         _window: Option<AnyWindowHandle>,
         cx: &mut App,
     ) -> ToolResult {
@@ -100,6 +104,42 @@ impl Tool for ReadFileTool {
         };
 
         let file_path = input.path.clone();
+
+        if image_store::is_image_file(&project, &project_path, cx) {
+            if !model.supports_images() {
+                return Task::ready(Err(anyhow!(
+                    "Attempted to read an image, but Zed doesn't currently sending images to {}.",
+                    model.name().0
+                )))
+                .into();
+            }
+
+            let task = cx.spawn(async move |cx| -> Result<ToolResultOutput> {
+                let image_entity: Entity<ImageItem> = cx
+                    .update(|cx| {
+                        project.update(cx, |project, cx| {
+                            project.open_image(project_path.clone(), cx)
+                        })
+                    })?
+                    .await?;
+
+                let image =
+                    image_entity.read_with(cx, |image_item, _| Arc::clone(&image_item.image))?;
+
+                let language_model_image = cx
+                    .update(|cx| LanguageModelImage::from_image(image, cx))?
+                    .await
+                    .ok_or_else(|| anyhow!("Failed to process image"))?;
+
+                Ok(ToolResultOutput {
+                    content: ToolResultContent::Image(language_model_image),
+                    output: None,
+                })
+            });
+
+            return task.into();
+        }
+
         cx.spawn(async move |cx| {
             let buffer = cx
                 .update(|cx| {
@@ -282,7 +322,10 @@ mod test {
                     .output
             })
             .await;
-        assert_eq!(result.unwrap().content, "This is a small file content");
+        assert_eq!(
+            result.unwrap().content.as_str(),
+            Some("This is a small file content")
+        );
     }
 
     #[gpui::test]
@@ -322,6 +365,7 @@ mod test {
             })
             .await;
         let content = result.unwrap();
+        let content = content.as_str().unwrap();
         assert_eq!(
             content.lines().skip(4).take(6).collect::<Vec<_>>(),
             vec![
@@ -365,6 +409,8 @@ mod test {
             .collect::<Vec<_>>();
         pretty_assertions::assert_eq!(
             content
+                .as_str()
+                .unwrap()
                 .lines()
                 .skip(4)
                 .take(expected_content.len())
@@ -408,7 +454,10 @@ mod test {
                     .output
             })
             .await;
-        assert_eq!(result.unwrap().content, "Line 2\nLine 3\nLine 4");
+        assert_eq!(
+            result.unwrap().content.as_str(),
+            Some("Line 2\nLine 3\nLine 4")
+        );
     }
 
     #[gpui::test]
@@ -448,7 +497,7 @@ mod test {
                     .output
             })
             .await;
-        assert_eq!(result.unwrap().content, "Line 1\nLine 2");
+        assert_eq!(result.unwrap().content.as_str(), Some("Line 1\nLine 2"));
 
         // end_line of 0 should result in at least 1 line
         let result = cx
@@ -471,7 +520,7 @@ mod test {
                     .output
             })
             .await;
-        assert_eq!(result.unwrap().content, "Line 1");
+        assert_eq!(result.unwrap().content.as_str(), Some("Line 1"));
 
         // when start_line > end_line, should still return at least 1 line
         let result = cx
@@ -494,7 +543,7 @@ mod test {
                     .output
             })
             .await;
-        assert_eq!(result.unwrap().content, "Line 3");
+        assert_eq!(result.unwrap().content.as_str(), Some("Line 3"));
     }
 
     fn init_test(cx: &mut TestAppContext) {

crates/assistant_tools/src/terminal_tool.rs

@@ -1,5 +1,5 @@
 use crate::schema::json_schema_for;
-use anyhow::{Context as _, Result, anyhow, bail};
+use anyhow::{Context as _, Result, anyhow};
 use assistant_tool::{ActionLog, Tool, ToolCard, ToolResult, ToolUseStatus};
 use futures::{FutureExt as _, future::Shared};
 use gpui::{
@@ -125,18 +125,24 @@ impl Tool for TerminalTool {
             Err(err) => return Task::ready(Err(anyhow!(err))).into(),
         };
 
-        let input_path = Path::new(&input.cd);
-        let working_dir = match working_dir(&input, &project, input_path, cx) {
+        let working_dir = match working_dir(&input, &project, cx) {
             Ok(dir) => dir,
             Err(err) => return Task::ready(Err(err)).into(),
         };
         let program = self.determine_shell.clone();
         let command = if cfg!(windows) {
             format!("$null | & {{{}}}", input.command.replace("\"", "'"))
+        } else if let Some(cwd) = working_dir
+            .as_ref()
+            .and_then(|cwd| cwd.as_os_str().to_str())
+        {
+            // Make sure once we're *inside* the shell, we cd into `cwd`
+            format!("(cd {cwd}; {}) </dev/null", input.command)
         } else {
             format!("({}) </dev/null", input.command)
         };
         let args = vec!["-c".into(), command];
+
         let cwd = working_dir.clone();
         let env = match &working_dir {
             Some(dir) => project.update(cx, |project, cx| {
@@ -319,19 +325,13 @@ fn process_content(
     } else {
         content
     };
-    let is_empty = content.trim().is_empty();
-
-    let content = format!(
-        "```\n{}{}```",
-        content,
-        if content.ends_with('\n') { "" } else { "\n" }
-    );
-
+    let content = content.trim();
+    let is_empty = content.is_empty();
+    let content = format!("```\n{content}\n```");
     let content = if should_truncate {
         format!(
-            "Command output too long. The first {} bytes:\n\n{}",
+            "Command output too long. The first {} bytes:\n\n{content}",
             content.len(),
-            content,
         )
     } else {
         content
@@ -371,42 +371,47 @@ fn process_content(
 fn working_dir(
     input: &TerminalToolInput,
     project: &Entity<Project>,
-    input_path: &Path,
     cx: &mut App,
 ) -> Result<Option<PathBuf>> {
     let project = project.read(cx);
+    let cd = &input.cd;
 
-    if input.cd == "." {
-        // Accept "." as meaning "the one worktree" if we only have one worktree.
+    if cd == "." || cd == "" {
+        // Accept "." or "" as meaning "the one worktree" if we only have one worktree.
         let mut worktrees = project.worktrees(cx);
 
         match worktrees.next() {
             Some(worktree) => {
-                if worktrees.next().is_some() {
-                    bail!(
+                if worktrees.next().is_none() {
+                    Ok(Some(worktree.read(cx).abs_path().to_path_buf()))
+                } else {
+                    Err(anyhow!(
                         "'.' is ambiguous in multi-root workspaces. Please specify a root directory explicitly.",
-                    );
+                    ))
                 }
-                Ok(Some(worktree.read(cx).abs_path().to_path_buf()))
             }
             None => Ok(None),
         }
-    } else if input_path.is_absolute() {
-        // Absolute paths are allowed, but only if they're in one of the project's worktrees.
-        if !project
-            .worktrees(cx)
-            .any(|worktree| input_path.starts_with(&worktree.read(cx).abs_path()))
-        {
-            bail!("The absolute path must be within one of the project's worktrees");
+    } else {
+        let input_path = Path::new(cd);
+
+        if input_path.is_absolute() {
+            // Absolute paths are allowed, but only if they're in one of the project's worktrees.
+            if project
+                .worktrees(cx)
+                .any(|worktree| input_path.starts_with(&worktree.read(cx).abs_path()))
+            {
+                return Ok(Some(input_path.into()));
+            }
+        } else {
+            if let Some(worktree) = project.worktree_for_root_name(cd, cx) {
+                return Ok(Some(worktree.read(cx).abs_path().to_path_buf()));
+            }
         }
 
-        Ok(Some(input_path.into()))
-    } else {
-        let Some(worktree) = project.worktree_for_root_name(&input.cd, cx) else {
-            bail!("`cd` directory {:?} not found in the project", input.cd);
-        };
-
-        Ok(Some(worktree.read(cx).abs_path().to_path_buf()))
+        Err(anyhow!(
+            "`cd` directory {cd:?} was not in any of the project's worktrees."
+        ))
     }
 }
 
@@ -727,8 +732,8 @@ mod tests {
             )
         });
 
-        let output = result.output.await.log_err().map(|output| output.content);
-        assert_eq!(output, Some("Command executed successfully.".into()));
+        let output = result.output.await.log_err().unwrap().content;
+        assert_eq!(output.as_str().unwrap(), "Command executed successfully.");
     }
 
     #[gpui::test]
@@ -761,12 +766,13 @@ mod tests {
                 cx,
             );
             cx.spawn(async move |_| {
-                let output = headless_result
-                    .output
-                    .await
-                    .log_err()
-                    .map(|output| output.content);
-                assert_eq!(output, expected);
+                let output = headless_result.output.await.map(|output| output.content);
+                assert_eq!(
+                    output
+                        .ok()
+                        .and_then(|content| content.as_str().map(ToString::to_string)),
+                    expected
+                );
             })
         };
 
@@ -774,7 +780,7 @@ mod tests {
             check(
                 TerminalToolInput {
                     command: "pwd".into(),
-                    cd: "project".into(),
+                    cd: ".".into(),
                 },
                 Some(format!(
                     "```\n{}\n```",
@@ -789,12 +795,9 @@ mod tests {
             check(
                 TerminalToolInput {
                     command: "pwd".into(),
-                    cd: ".".into(),
+                    cd: "other-project".into(),
                 },
-                Some(format!(
-                    "```\n{}\n```",
-                    tree.path().join("project").display()
-                )),
+                None, // other-project is a dir, but *not* a worktree (yet)
                 cx,
             )
         })

crates/assistant_tools/src/web_search_tool.rs

@@ -3,7 +3,9 @@ use std::{sync::Arc, time::Duration};
 use crate::schema::json_schema_for;
 use crate::ui::ToolCallCardHeader;
 use anyhow::{Context as _, Result, anyhow};
-use assistant_tool::{ActionLog, Tool, ToolCard, ToolResult, ToolResultOutput, ToolUseStatus};
+use assistant_tool::{
+    ActionLog, Tool, ToolCard, ToolResult, ToolResultContent, ToolResultOutput, ToolUseStatus,
+};
 use futures::{Future, FutureExt, TryFutureExt};
 use gpui::{
     AnyWindowHandle, App, AppContext, Context, Entity, IntoElement, Task, WeakEntity, Window,
@@ -74,8 +76,10 @@ impl Tool for WebSearchTool {
             async move {
                 let response = search_task.await.map_err(|err| anyhow!(err))?;
                 Ok(ToolResultOutput {
-                    content: serde_json::to_string(&response)
-                        .context("Failed to serialize search results")?,
+                    content: ToolResultContent::Text(
+                        serde_json::to_string(&response)
+                            .context("Failed to serialize search results")?,
+                    ),
                     output: Some(serde_json::to_value(response)?),
                 })
             }

crates/collab_ui/src/collab_panel.rs

@@ -378,16 +378,27 @@ impl CollabPanel {
         workspace: WeakEntity<Workspace>,
         mut cx: AsyncWindowContext,
     ) -> anyhow::Result<Entity<Self>> {
-        let serialized_panel = cx
-            .background_spawn(async move { KEY_VALUE_STORE.read_kvp(COLLABORATION_PANEL_KEY) })
-            .await
-            .map_err(|_| anyhow::anyhow!("Failed to read collaboration panel from key value store"))
-            .log_err()
+        let serialized_panel = match workspace
+            .read_with(&cx, |workspace, _| {
+                CollabPanel::serialization_key(workspace)
+            })
+            .ok()
             .flatten()
-            .map(|panel| serde_json::from_str::<SerializedCollabPanel>(&panel))
-            .transpose()
-            .log_err()
-            .flatten();
+        {
+            Some(serialization_key) => cx
+                .background_spawn(async move { KEY_VALUE_STORE.read_kvp(&serialization_key) })
+                .await
+                .map_err(|_| {
+                    anyhow::anyhow!("Failed to read collaboration panel from key value store")
+                })
+                .log_err()
+                .flatten()
+                .map(|panel| serde_json::from_str::<SerializedCollabPanel>(&panel))
+                .transpose()
+                .log_err()
+                .flatten(),
+            None => None,
+        };
 
         workspace.update_in(&mut cx, |workspace, window, cx| {
             let panel = CollabPanel::new(workspace, window, cx);
@@ -407,14 +418,30 @@ impl CollabPanel {
         })
     }
 
+    fn serialization_key(workspace: &Workspace) -> Option<String> {
+        workspace
+            .database_id()
+            .map(|id| i64::from(id).to_string())
+            .or(workspace.session_id())
+            .map(|id| format!("{}-{:?}", COLLABORATION_PANEL_KEY, id))
+    }
+
     fn serialize(&mut self, cx: &mut Context<Self>) {
+        let Some(serialization_key) = self
+            .workspace
+            .update(cx, |workspace, _| CollabPanel::serialization_key(workspace))
+            .ok()
+            .flatten()
+        else {
+            return;
+        };
         let width = self.width;
         let collapsed_channels = self.collapsed_channels.clone();
         self.pending_serialization = cx.background_spawn(
             async move {
                 KEY_VALUE_STORE
                     .write_kvp(
-                        COLLABORATION_PANEL_KEY.into(),
+                        serialization_key,
                         serde_json::to_string(&SerializedCollabPanel {
                             width,
                             collapsed_channels: Some(
@@ -2999,10 +3026,12 @@ impl Panel for CollabPanel {
             .unwrap_or_else(|| CollaborationPanelSettings::get_global(cx).default_width)
     }
 
-    fn set_size(&mut self, size: Option<Pixels>, _: &mut Window, cx: &mut Context<Self>) {
+    fn set_size(&mut self, size: Option<Pixels>, window: &mut Window, cx: &mut Context<Self>) {
         self.width = size;
-        self.serialize(cx);
         cx.notify();
+        cx.defer_in(window, |this, _, cx| {
+            this.serialize(cx);
+        });
     }
 
     fn icon(&self, _window: &Window, cx: &App) -> Option<ui::IconName> {

crates/copilot/src/copilot_chat.rs

@@ -113,7 +113,7 @@ pub enum ModelVendor {
 
 #[derive(Serialize, Deserialize, Debug, Eq, PartialEq, Clone)]
 #[serde(tag = "type")]
-pub enum ChatMessageContent {
+pub enum ChatMessagePart {
     #[serde(rename = "text")]
     Text { text: String },
     #[serde(rename = "image_url")]
@@ -194,26 +194,55 @@ pub enum ToolChoice {
     None,
 }
 
-#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
+#[derive(Serialize, Deserialize, Debug)]
 #[serde(tag = "role", rename_all = "lowercase")]
 pub enum ChatMessage {
     Assistant {
-        content: Option<String>,
+        content: ChatMessageContent,
         #[serde(default, skip_serializing_if = "Vec::is_empty")]
         tool_calls: Vec<ToolCall>,
     },
     User {
-        content: Vec<ChatMessageContent>,
+        content: ChatMessageContent,
     },
     System {
         content: String,
     },
     Tool {
-        content: String,
+        content: ChatMessageContent,
         tool_call_id: String,
     },
 }
 
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum ChatMessageContent {
+    Plain(String),
+    Multipart(Vec<ChatMessagePart>),
+}
+
+impl ChatMessageContent {
+    pub fn empty() -> Self {
+        ChatMessageContent::Multipart(vec![])
+    }
+}
+
+impl From<Vec<ChatMessagePart>> for ChatMessageContent {
+    fn from(mut parts: Vec<ChatMessagePart>) -> Self {
+        if let [ChatMessagePart::Text { text }] = parts.as_mut_slice() {
+            ChatMessageContent::Plain(std::mem::take(text))
+        } else {
+            ChatMessageContent::Multipart(parts)
+        }
+    }
+}
+
+impl From<String> for ChatMessageContent {
+    fn from(text: String) -> Self {
+        ChatMessageContent::Plain(text)
+    }
+}
+
 #[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
 pub struct ToolCall {
     pub id: String,

crates/dap/src/adapters.rs

@@ -4,11 +4,11 @@ use async_compression::futures::bufread::GzipDecoder;
 use async_tar::Archive;
 use async_trait::async_trait;
 use collections::HashMap;
-use dap_types::{StartDebuggingRequestArguments, StartDebuggingRequestArgumentsRequest};
+pub use dap_types::{StartDebuggingRequestArguments, StartDebuggingRequestArgumentsRequest};
 use futures::io::BufReader;
 use gpui::{AsyncApp, SharedString};
 pub use http_client::{HttpClient, github::latest_github_release};
-use language::LanguageToolchainStore;
+use language::{LanguageName, LanguageToolchainStore};
 use node_runtime::NodeRuntime;
 use serde::{Deserialize, Serialize};
 use settings::WorktreeId;
@@ -418,6 +418,11 @@ pub trait DebugAdapter: 'static + Send + Sync {
         user_installed_path: Option<PathBuf>,
         cx: &mut AsyncApp,
     ) -> Result<DebugAdapterBinary>;
+
+    /// Returns the language name of an adapter if it only supports one language
+    fn adapter_language_name(&self) -> Option<LanguageName> {
+        None
+    }
 }
 
 #[cfg(any(test, feature = "test-support"))]

crates/dap/src/client.rs

@@ -7,21 +7,14 @@ use dap_types::{
     messages::{Message, Response},
     requests::Request,
 };
-use futures::{FutureExt as _, channel::oneshot, select};
-use gpui::{AppContext, AsyncApp, BackgroundExecutor};
+use futures::channel::oneshot;
+use gpui::{AppContext, AsyncApp};
 use smol::channel::{Receiver, Sender};
 use std::{
     hash::Hash,
     sync::atomic::{AtomicU64, Ordering},
-    time::Duration,
 };
 
-#[cfg(any(test, feature = "test-support"))]
-const DAP_REQUEST_TIMEOUT: Duration = Duration::from_secs(2);
-
-#[cfg(not(any(test, feature = "test-support")))]
-const DAP_REQUEST_TIMEOUT: Duration = Duration::from_secs(12);
-
 #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[repr(transparent)]
 pub struct SessionId(pub u32);
@@ -41,7 +34,6 @@ pub struct DebugAdapterClient {
     id: SessionId,
     sequence_count: AtomicU64,
     binary: DebugAdapterBinary,
-    executor: BackgroundExecutor,
     transport_delegate: TransportDelegate,
 }
 
@@ -61,7 +53,6 @@ impl DebugAdapterClient {
             binary,
             transport_delegate,
             sequence_count: AtomicU64::new(1),
-            executor: cx.background_executor().clone(),
         };
         log::info!("Successfully connected to debug adapter");
 
@@ -173,40 +164,33 @@ impl DebugAdapterClient {
 
         self.send_message(Message::Request(request)).await?;
 
-        let mut timeout = self.executor.timer(DAP_REQUEST_TIMEOUT).fuse();
         let command = R::COMMAND.to_string();
 
-        select! {
-            response = callback_rx.fuse() => {
-                log::debug!(
-                    "Client {} received response for: `{}` sequence_id: {}",
-                    self.id.0,
-                    command,
-                    sequence_id
-                );
-
-                let response = response??;
-                match response.success {
-                    true => {
-                        if let Some(json) = response.body {
-                            Ok(serde_json::from_value(json)?)
-                        // Note: dap types configure themselves to return `None` when an empty object is received,
-                        // which then fails here...
-                        } else if let Ok(result) = serde_json::from_value(serde_json::Value::Object(Default::default())) {
-                            Ok(result)
-                        } else {
-                            Ok(serde_json::from_value(Default::default())?)
-                        }
-                    }
-                    false => Err(anyhow!("Request failed: {}", response.message.unwrap_or_default())),
+        let response = callback_rx.await??;
+        log::debug!(
+            "Client {} received response for: `{}` sequence_id: {}",
+            self.id.0,
+            command,
+            sequence_id
+        );
+        match response.success {
+            true => {
+                if let Some(json) = response.body {
+                    Ok(serde_json::from_value(json)?)
+                // Note: dap types configure themselves to return `None` when an empty object is received,
+                // which then fails here...
+                } else if let Ok(result) =
+                    serde_json::from_value(serde_json::Value::Object(Default::default()))
+                {
+                    Ok(result)
+                } else {
+                    Ok(serde_json::from_value(Default::default())?)
                 }
             }
-
-            _ = timeout => {
-                self.transport_delegate.cancel_pending_request(&sequence_id).await;
-                log::error!("Cancelled DAP request for {command:?} id {sequence_id} which took over {DAP_REQUEST_TIMEOUT:?}");
-                anyhow::bail!("DAP request timeout");
-            }
+            false => Err(anyhow!(
+                "Request failed: {}",
+                response.message.unwrap_or_default()
+            )),
         }
     }
 

crates/dap/src/inline_value.rs

@@ -29,7 +29,7 @@ pub struct InlineValueLocation {
 /// during debugging sessions. Implementors must also handle variable scoping
 /// themselves by traversing the syntax tree upwards to determine whether a
 /// variable is local or global.
-pub trait InlineValueProvider {
+pub trait InlineValueProvider: 'static + Send + Sync {
     /// Provides a list of inline value locations based on the given node and source code.
     ///
     /// # Parameters

crates/dap/src/registry.rs

@@ -2,6 +2,7 @@ use anyhow::Result;
 use async_trait::async_trait;
 use collections::FxHashMap;
 use gpui::{App, Global, SharedString};
+use language::LanguageName;
 use parking_lot::RwLock;
 use task::{DebugRequest, DebugScenario, SpawnInTerminal, TaskTemplate};
 
@@ -59,6 +60,11 @@ impl DapRegistry {
         );
     }
 
+    pub fn adapter_language(&self, adapter_name: &str) -> Option<LanguageName> {
+        self.adapter(adapter_name)
+            .and_then(|adapter| adapter.adapter_language_name())
+    }
+
     pub fn add_locator(&self, locator: Arc<dyn DapLocator>) {
         let _previous_value = self.0.write().locators.insert(locator.name(), locator);
         debug_assert!(

crates/dap/src/transport.rs

@@ -224,11 +224,6 @@ impl TransportDelegate {
         pending_requests.insert(sequence_id, request);
     }
 
-    pub(crate) async fn cancel_pending_request(&self, sequence_id: &u64) {
-        let mut pending_requests = self.pending_requests.lock().await;
-        pending_requests.remove(sequence_id);
-    }
-
     pub(crate) async fn send_message(&self, message: Message) -> Result<()> {
         if let Some(server_tx) = self.server_tx.lock().await.as_ref() {
             server_tx

crates/dap_adapters/src/go.rs

@@ -1,5 +1,6 @@
 use dap::{StartDebuggingRequestArguments, adapters::DebugTaskDefinition};
-use gpui::AsyncApp;
+use gpui::{AsyncApp, SharedString};
+use language::LanguageName;
 use std::{collections::HashMap, ffi::OsStr, path::PathBuf};
 
 use crate::*;
@@ -43,6 +44,10 @@ impl DebugAdapter for GoDebugAdapter {
         DebugAdapterName(Self::ADAPTER_NAME.into())
     }
 
+    fn adapter_language_name(&self) -> Option<LanguageName> {
+        Some(SharedString::new_static("Go").into())
+    }
+
     async fn get_binary(
         &self,
         delegate: &dyn DapDelegate,

crates/dap_adapters/src/php.rs

@@ -1,6 +1,7 @@
 use adapters::latest_github_release;
 use dap::adapters::{DebugTaskDefinition, TcpArguments};
-use gpui::AsyncApp;
+use gpui::{AsyncApp, SharedString};
+use language::LanguageName;
 use std::{collections::HashMap, path::PathBuf, sync::OnceLock};
 use util::ResultExt;
 
@@ -119,6 +120,10 @@ impl DebugAdapter for PhpDebugAdapter {
         DebugAdapterName(Self::ADAPTER_NAME.into())
     }
 
+    fn adapter_language_name(&self) -> Option<LanguageName> {
+        Some(SharedString::new_static("PHP").into())
+    }
+
     async fn get_binary(
         &self,
         delegate: &dyn DapDelegate,

crates/dap_adapters/src/python.rs

@@ -1,6 +1,7 @@
 use crate::*;
 use dap::{DebugRequest, StartDebuggingRequestArguments, adapters::DebugTaskDefinition};
-use gpui::AsyncApp;
+use gpui::{AsyncApp, SharedString};
+use language::LanguageName;
 use std::{collections::HashMap, ffi::OsStr, path::PathBuf, sync::OnceLock};
 use util::ResultExt;
 
@@ -165,6 +166,10 @@ impl DebugAdapter for PythonDebugAdapter {
         DebugAdapterName(Self::ADAPTER_NAME.into())
     }
 
+    fn adapter_language_name(&self) -> Option<LanguageName> {
+        Some(SharedString::new_static("Python").into())
+    }
+
     async fn get_binary(
         &self,
         delegate: &dyn DapDelegate,

crates/dap_adapters/src/ruby.rs

@@ -6,7 +6,8 @@ use dap::{
         self, DapDelegate, DebugAdapter, DebugAdapterBinary, DebugAdapterName, DebugTaskDefinition,
     },
 };
-use gpui::AsyncApp;
+use gpui::{AsyncApp, SharedString};
+use language::LanguageName;
 use std::path::PathBuf;
 use util::command::new_smol_command;
 
@@ -25,6 +26,10 @@ impl DebugAdapter for RubyDebugAdapter {
         DebugAdapterName(Self::ADAPTER_NAME.into())
     }
 
+    fn adapter_language_name(&self) -> Option<LanguageName> {
+        Some(SharedString::new_static("Ruby").into())
+    }
+
     async fn get_binary(
         &self,
         delegate: &dyn DapDelegate,

crates/debug_adapter_extension/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "debug_adapter_extension"
+version = "0.1.0"
+license = "GPL-3.0-or-later"
+publish.workspace = true
+edition.workspace = true
+
+[dependencies]
+anyhow.workspace = true
+async-trait.workspace = true
+dap.workspace = true
+extension.workspace = true
+gpui.workspace = true
+workspace-hack = { version = "0.1", path = "../../tooling/workspace-hack" }
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/debug_adapter_extension.rs"

crates/debug_adapter_extension/LICENSE-GPL

@@ -0,0 +1 @@
+../../LICENSE-GPL

crates/debug_adapter_extension/src/debug_adapter_extension.rs

@@ -0,0 +1,40 @@
+mod extension_dap_adapter;
+
+use std::sync::Arc;
+
+use dap::DapRegistry;
+use extension::{ExtensionDebugAdapterProviderProxy, ExtensionHostProxy};
+use extension_dap_adapter::ExtensionDapAdapter;
+use gpui::App;
+
+pub fn init(extension_host_proxy: Arc<ExtensionHostProxy>, cx: &mut App) {
+    let language_server_registry_proxy = DebugAdapterRegistryProxy::new(cx);
+    extension_host_proxy.register_debug_adapter_proxy(language_server_registry_proxy);
+}
+
+#[derive(Clone)]
+struct DebugAdapterRegistryProxy {
+    debug_adapter_registry: DapRegistry,
+}
+
+impl DebugAdapterRegistryProxy {
+    fn new(cx: &mut App) -> Self {
+        Self {
+            debug_adapter_registry: DapRegistry::global(cx).clone(),
+        }
+    }
+}
+
+impl ExtensionDebugAdapterProviderProxy for DebugAdapterRegistryProxy {
+    fn register_debug_adapter(
+        &self,
+        extension: Arc<dyn extension::Extension>,
+        debug_adapter_name: Arc<str>,
+    ) {
+        self.debug_adapter_registry
+            .add_adapter(Arc::new(ExtensionDapAdapter::new(
+                extension,
+                debug_adapter_name,
+            )));
+    }
+}

crates/debug_adapter_extension/src/extension_dap_adapter.rs

@@ -0,0 +1,49 @@
+use std::{path::PathBuf, sync::Arc};
+
+use anyhow::Result;
+use async_trait::async_trait;
+use dap::adapters::{
+    DapDelegate, DebugAdapter, DebugAdapterBinary, DebugAdapterName, DebugTaskDefinition,
+};
+use extension::Extension;
+use gpui::AsyncApp;
+
+pub(crate) struct ExtensionDapAdapter {
+    extension: Arc<dyn Extension>,
+    debug_adapter_name: Arc<str>,
+}
+
+impl ExtensionDapAdapter {
+    pub(crate) fn new(
+        extension: Arc<dyn extension::Extension>,
+        debug_adapter_name: Arc<str>,
+    ) -> Self {
+        Self {
+            extension,
+            debug_adapter_name,
+        }
+    }
+}
+
+#[async_trait(?Send)]
+impl DebugAdapter for ExtensionDapAdapter {
+    fn name(&self) -> DebugAdapterName {
+        self.debug_adapter_name.as_ref().into()
+    }
+
+    async fn get_binary(
+        &self,
+        _: &dyn DapDelegate,
+        config: &DebugTaskDefinition,
+        user_installed_path: Option<PathBuf>,
+        _cx: &mut AsyncApp,
+    ) -> Result<DebugAdapterBinary> {
+        self.extension
+            .get_dap_binary(
+                self.debug_adapter_name.clone(),
+                config.clone(),
+                user_installed_path,
+            )
+            .await
+    }
+}

crates/debugger_tools/src/dap_log.rs

@@ -684,7 +684,7 @@ impl Render for DapLogView {
     }
 }
 
-actions!(debug, [OpenDebuggerAdapterLogs]);
+actions!(dev, [OpenDebugAdapterLogs]);
 
 pub fn init(cx: &mut App) {
     let log_store = cx.new(|cx| LogStore::new(cx));
@@ -702,7 +702,7 @@ pub fn init(cx: &mut App) {
         }
 
         let log_store = log_store.clone();
-        workspace.register_action(move |workspace, _: &OpenDebuggerAdapterLogs, window, cx| {
+        workspace.register_action(move |workspace, _: &OpenDebugAdapterLogs, window, cx| {
             let project = workspace.project().read(cx);
             if project.is_local() {
                 workspace.add_item_to_active_pane(

crates/debugger_ui/Cargo.toml

@@ -36,6 +36,7 @@ dap_adapters = { workspace = true, optional = true }
 db.workspace = true
 editor.workspace = true
 feature_flags.workspace = true
+file_icons.workspace = true
 futures.workspace = true
 fuzzy.workspace = true
 gpui.workspace = true

crates/debugger_ui/src/debugger_panel.rs

@@ -1,9 +1,11 @@
 use crate::persistence::DebuggerPaneItem;
 use crate::session::DebugSession;
+use crate::session::running::RunningState;
 use crate::{
     ClearAllBreakpoints, Continue, Detach, FocusBreakpointList, FocusConsole, FocusFrames,
-    FocusLoadedSources, FocusModules, FocusTerminal, FocusVariables, Pause, Restart, StepBack,
-    StepInto, StepOut, StepOver, Stop, ToggleIgnoreBreakpoints, persistence,
+    FocusLoadedSources, FocusModules, FocusTerminal, FocusVariables, Pause, Restart,
+    ShowStackTrace, StepBack, StepInto, StepOut, StepOver, Stop, ToggleIgnoreBreakpoints,
+    persistence,
 };
 use anyhow::{Result, anyhow};
 use command_palette_hooks::CommandPaletteFilter;
@@ -29,7 +31,7 @@ use settings::Settings;
 use std::any::TypeId;
 use std::sync::Arc;
 use task::{DebugScenario, TaskContext};
-use ui::{ContextMenu, Divider, DropdownMenu, Tooltip, prelude::*};
+use ui::{ContextMenu, Divider, Tooltip, prelude::*};
 use workspace::SplitDirection;
 use workspace::{
     Pane, Workspace,
@@ -67,11 +69,7 @@ pub struct DebugPanel {
 }
 
 impl DebugPanel {
-    pub fn new(
-        workspace: &Workspace,
-        _window: &mut Window,
-        cx: &mut Context<Workspace>,
-    ) -> Entity<Self> {
+    pub fn new(workspace: &Workspace, cx: &mut Context<Workspace>) -> Entity<Self> {
         cx.new(|cx| {
             let project = workspace.project().clone();
 
@@ -90,7 +88,20 @@ impl DebugPanel {
         })
     }
 
-    fn filter_action_types(&self, cx: &mut App) {
+    pub(crate) fn sessions(&self) -> Vec<Entity<DebugSession>> {
+        self.sessions.clone()
+    }
+
+    pub fn active_session(&self) -> Option<Entity<DebugSession>> {
+        self.active_session.clone()
+    }
+
+    pub(crate) fn running_state(&self, cx: &mut App) -> Option<Entity<RunningState>> {
+        self.active_session()
+            .map(|session| session.read(cx).running_state().clone())
+    }
+
+    pub(crate) fn filter_action_types(&self, cx: &mut App) {
         let (has_active_session, supports_restart, support_step_back, status) = self
             .active_session()
             .map(|item| {
@@ -119,6 +130,7 @@ impl DebugPanel {
             TypeId::of::<StepOver>(),
             TypeId::of::<StepInto>(),
             TypeId::of::<StepOut>(),
+            TypeId::of::<ShowStackTrace>(),
             TypeId::of::<editor::actions::DebuggerRunToCursor>(),
             TypeId::of::<editor::actions::DebuggerEvaluateSelectedText>(),
         ];
@@ -170,8 +182,8 @@ impl DebugPanel {
         cx: &mut AsyncWindowContext,
     ) -> Task<Result<Entity<Self>>> {
         cx.spawn(async move |cx| {
-            workspace.update_in(cx, |workspace, window, cx| {
-                let debug_panel = DebugPanel::new(workspace, window, cx);
+            workspace.update(cx, |workspace, cx| {
+                let debug_panel = DebugPanel::new(workspace, cx);
 
                 workspace.register_action(|workspace, _: &ClearAllBreakpoints, _, cx| {
                     workspace.project().read(cx).breakpoint_store().update(
@@ -218,6 +230,18 @@ impl DebugPanel {
                 cx,
             )
         });
+        if let Some(inventory) = self
+            .project
+            .read(cx)
+            .task_store()
+            .read(cx)
+            .task_inventory()
+            .cloned()
+        {
+            inventory.update(cx, |inventory, _| {
+                inventory.scenario_scheduled(scenario.clone());
+            })
+        }
         let task = cx.spawn_in(window, {
             let session = session.clone();
             async move |this, cx| {
@@ -263,7 +287,7 @@ impl DebugPanel {
         .detach_and_log_err(cx);
     }
 
-    async fn register_session(
+    pub(crate) async fn register_session(
         this: WeakEntity<Self>,
         session: Entity<Session>,
         cx: &mut AsyncWindowContext,
@@ -332,7 +356,7 @@ impl DebugPanel {
         Ok(debug_session)
     }
 
-    fn handle_restart_request(
+    pub(crate) fn handle_restart_request(
         &mut self,
         mut curr_session: Entity<Session>,
         window: &mut Window,
@@ -406,10 +430,12 @@ impl DebugPanel {
         .detach_and_log_err(cx);
     }
 
-    pub fn active_session(&self) -> Option<Entity<DebugSession>> {
-        self.active_session.clone()
-    }
-    fn close_session(&mut self, entity_id: EntityId, window: &mut Window, cx: &mut Context<Self>) {
+    pub(crate) fn close_session(
+        &mut self,
+        entity_id: EntityId,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
         let Some(session) = self
             .sessions
             .iter()
@@ -463,93 +489,8 @@ impl DebugPanel {
         })
         .detach();
     }
-    fn sessions_drop_down_menu(
-        &self,
-        active_session: &Entity<DebugSession>,
-        window: &mut Window,
-        cx: &mut Context<Self>,
-    ) -> DropdownMenu {
-        let sessions = self.sessions.clone();
-        let weak = cx.weak_entity();
-        let label = active_session.read(cx).label_element(cx);
 
-        DropdownMenu::new_with_element(
-            "debugger-session-list",
-            label,
-            ContextMenu::build(window, cx, move |mut this, _, cx| {
-                let context_menu = cx.weak_entity();
-                for session in sessions.into_iter() {
-                    let weak_session = session.downgrade();
-                    let weak_session_id = weak_session.entity_id();
-
-                    this = this.custom_entry(
-                        {
-                            let weak = weak.clone();
-                            let context_menu = context_menu.clone();
-                            move |_, cx| {
-                                weak_session
-                                    .read_with(cx, |session, cx| {
-                                        let context_menu = context_menu.clone();
-                                        let id: SharedString =
-                                            format!("debug-session-{}", session.session_id(cx).0)
-                                                .into();
-                                        h_flex()
-                                            .w_full()
-                                            .group(id.clone())
-                                            .justify_between()
-                                            .child(session.label_element(cx))
-                                            .child(
-                                                IconButton::new(
-                                                    "close-debug-session",
-                                                    IconName::Close,
-                                                )
-                                                .visible_on_hover(id.clone())
-                                                .icon_size(IconSize::Small)
-                                                .on_click({
-                                                    let weak = weak.clone();
-                                                    move |_, window, cx| {
-                                                        weak.update(cx, |panel, cx| {
-                                                            panel.close_session(
-                                                                weak_session_id,
-                                                                window,
-                                                                cx,
-                                                            );
-                                                        })
-                                                        .ok();
-                                                        context_menu
-                                                            .update(cx, |this, cx| {
-                                                                this.cancel(
-                                                                    &Default::default(),
-                                                                    window,
-                                                                    cx,
-                                                                );
-                                                            })
-                                                            .ok();
-                                                    }
-                                                }),
-                                            )
-                                            .into_any_element()
-                                    })
-                                    .unwrap_or_else(|_| div().into_any_element())
-                            }
-                        },
-                        {
-                            let weak = weak.clone();
-                            move |window, cx| {
-                                weak.update(cx, |panel, cx| {
-                                    panel.activate_session(session.clone(), window, cx);
-                                })
-                                .ok();
-                            }
-                        },
-                    );
-                }
-                this
-            }),
-        )
-    }
-
-    fn deploy_context_menu(
+    pub(crate) fn deploy_context_menu(
         &mut self,
         position: Point<Pixels>,
         window: &mut Window,
@@ -600,7 +541,11 @@ impl DebugPanel {
         }
     }
 
-    fn top_controls_strip(&self, window: &mut Window, cx: &mut Context<Self>) -> Option<Div> {
+    pub(crate) fn top_controls_strip(
+        &mut self,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Option<Div> {
         let active_session = self.active_session.clone();
         let focus_handle = self.focus_handle.clone();
         let is_side = self.position(window, cx).axis() == gpui::Axis::Horizontal;
@@ -640,12 +585,12 @@ impl DebugPanel {
                                 active_session
                                     .as_ref()
                                     .map(|session| session.read(cx).running_state()),
-                                |this, running_session| {
+                                |this, running_state| {
                                     let thread_status =
-                                        running_session.read(cx).thread_status(cx).unwrap_or(
+                                        running_state.read(cx).thread_status(cx).unwrap_or(
                                             project::debugger::session::ThreadStatus::Exited,
                                         );
-                                    let capabilities = running_session.read(cx).capabilities(cx);
+                                    let capabilities = running_state.read(cx).capabilities(cx);
                                     this.map(|this| {
                                         if thread_status == ThreadStatus::Running {
                                             this.child(
@@ -656,7 +601,7 @@ impl DebugPanel {
                                                 .icon_size(IconSize::XSmall)
                                                 .shape(ui::IconButtonShape::Square)
                                                 .on_click(window.listener_for(
-                                                    &running_session,
+                                                    &running_state,
                                                     |this, _, _window, cx| {
                                                         this.pause_thread(cx);
                                                     },
@@ -683,7 +628,7 @@ impl DebugPanel {
                                                 .icon_size(IconSize::XSmall)
                                                 .shape(ui::IconButtonShape::Square)
                                                 .on_click(window.listener_for(
-                                                    &running_session,
+                                                    &running_state,
                                                     |this, _, _window, cx| this.continue_thread(cx),
                                                 ))
                                                 .disabled(thread_status != ThreadStatus::Stopped)
@@ -707,7 +652,7 @@ impl DebugPanel {
                                             .icon_size(IconSize::XSmall)
                                             .shape(ui::IconButtonShape::Square)
                                             .on_click(window.listener_for(
-                                                &running_session,
+                                                &running_state,
                                                 |this, _, _window, cx| {
                                                     this.step_over(cx);
                                                 },
@@ -731,7 +676,7 @@ impl DebugPanel {
                                             .icon_size(IconSize::XSmall)
                                             .shape(ui::IconButtonShape::Square)
                                             .on_click(window.listener_for(
-                                                &running_session,
+                                                &running_state,
                                                 |this, _, _window, cx| {
                                                     this.step_out(cx);
                                                 },
@@ -758,7 +703,7 @@ impl DebugPanel {
                                         .icon_size(IconSize::XSmall)
                                         .shape(ui::IconButtonShape::Square)
                                         .on_click(window.listener_for(
-                                            &running_session,
+                                            &running_state,
                                             |this, _, _window, cx| {
                                                 this.step_in(cx);
                                             },
@@ -808,7 +753,7 @@ impl DebugPanel {
                                                 || thread_status == ThreadStatus::Ended,
                                         )
                                         .on_click(window.listener_for(
-                                            &running_session,
+                                            &running_state,
                                             |this, _, _window, cx| {
                                                 this.toggle_ignore_breakpoints(cx);
                                             },
@@ -831,7 +776,7 @@ impl DebugPanel {
                                         IconButton::new("debug-restart", IconName::DebugRestart)
                                             .icon_size(IconSize::XSmall)
                                             .on_click(window.listener_for(
-                                                &running_session,
+                                                &running_state,
                                                 |this, _, _window, cx| {
                                                     this.restart_session(cx);
                                                 },
@@ -853,7 +798,7 @@ impl DebugPanel {
                                         IconButton::new("debug-stop", IconName::Power)
                                             .icon_size(IconSize::XSmall)
                                             .on_click(window.listener_for(
-                                                &running_session,
+                                                &running_state,
                                                 |this, _, _window, cx| {
                                                     this.stop_thread(cx);
                                                 },
@@ -887,7 +832,7 @@ impl DebugPanel {
                                         IconButton::new("debug-disconnect", IconName::DebugDetach)
                                             .icon_size(IconSize::XSmall)
                                             .on_click(window.listener_for(
-                                                &running_session,
+                                                &running_state,
                                                 |this, _, _, cx| {
                                                     this.detach_client(cx);
                                                 },
@@ -921,30 +866,42 @@ impl DebugPanel {
                                     .as_ref()
                                     .map(|session| session.read(cx).running_state())
                                     .cloned(),
-                                |this, session| {
-                                    this.child(
-                                        session.update(cx, |this, cx| {
-                                            this.thread_dropdown(window, cx)
-                                        }),
-                                    )
+                                |this, running_state| {
+                                    this.children({
+                                        let running_state = running_state.clone();
+                                        let threads =
+                                            running_state.update(cx, |running_state, cx| {
+                                                let session = running_state.session();
+                                                session
+                                                    .update(cx, |session, cx| session.threads(cx))
+                                            });
+
+                                        self.render_thread_dropdown(
+                                            &running_state,
+                                            threads,
+                                            window,
+                                            cx,
+                                        )
+                                    })
                                     .when(!is_side, |this| this.gap_2().child(Divider::vertical()))
                                 },
                             ),
                         )
                         .child(
                             h_flex()
-                                .when_some(active_session.as_ref(), |this, session| {
-                                    let context_menu =
-                                        self.sessions_drop_down_menu(session, window, cx);
-                                    this.child(context_menu).gap_2().child(Divider::vertical())
-                                })
+                                .children(self.render_session_menu(
+                                    self.active_session(),
+                                    self.running_state(cx),
+                                    window,
+                                    cx,
+                                ))
                                 .when(!is_side, |this| this.child(new_session_button())),
                         ),
                 ),
         )
     }
 
-    fn activate_pane_in_direction(
+    pub(crate) fn activate_pane_in_direction(
         &mut self,
         direction: SplitDirection,
         window: &mut Window,
@@ -959,7 +916,7 @@ impl DebugPanel {
         }
     }
 
-    fn activate_item(
+    pub(crate) fn activate_item(
         &mut self,
         item: DebuggerPaneItem,
         window: &mut Window,
@@ -974,7 +931,7 @@ impl DebugPanel {
         }
     }
 
-    fn activate_session(
+    pub(crate) fn activate_session(
         &mut self,
         session_item: Entity<DebugSession>,
         window: &mut Window,
@@ -987,7 +944,7 @@ impl DebugPanel {
                 this.go_to_selected_stack_frame(window, cx);
             });
         });
-        self.active_session = Some(session_item);
+        self.active_session = Some(session_item.clone());
         cx.notify();
     }
 
@@ -1119,7 +1076,7 @@ impl Panel for DebugPanel {
     }
 
     fn set_size(&mut self, size: Option<Pixels>, _window: &mut Window, _cx: &mut Context<Self>) {
-        self.size = size.unwrap();
+        self.size = size.unwrap_or(px(300.));
     }
 
     fn remote_id() -> Option<proto::PanelId> {

crates/debugger_ui/src/debugger_ui.rs

@@ -7,14 +7,17 @@ use new_session_modal::NewSessionModal;
 use project::debugger::{self, breakpoint_store::SourceBreakpoint};
 use session::DebugSession;
 use settings::Settings;
+use stack_trace_view::StackTraceView;
 use util::maybe;
-use workspace::{ShutdownDebugAdapters, Workspace};
+use workspace::{ItemHandle, ShutdownDebugAdapters, Workspace};
 
 pub mod attach_modal;
 pub mod debugger_panel;
+mod dropdown_menus;
 mod new_session_modal;
 mod persistence;
 pub(crate) mod session;
+mod stack_trace_view;
 
 #[cfg(any(test, feature = "test-support"))]
 pub mod tests;
@@ -41,6 +44,7 @@ actions!(
         FocusModules,
         FocusLoadedSources,
         FocusTerminal,
+        ShowStackTrace,
     ]
 );
 
@@ -146,6 +150,38 @@ pub fn init(cx: &mut App) {
                         })
                     },
                 )
+                .register_action(
+                    |workspace: &mut Workspace, _: &ShowStackTrace, window, cx| {
+                        let Some(debug_panel) = workspace.panel::<DebugPanel>(cx) else {
+                            return;
+                        };
+
+                        if let Some(existing) = workspace.item_of_type::<StackTraceView>(cx) {
+                            let is_active = workspace
+                                .active_item(cx)
+                                .is_some_and(|item| item.item_id() == existing.item_id());
+                            workspace.activate_item(&existing, true, !is_active, window, cx);
+                        } else {
+                            let Some(active_session) = debug_panel.read(cx).active_session() else {
+                                return;
+                            };
+
+                            let project = workspace.project();
+
+                            let stack_trace_view = active_session.update(cx, |session, cx| {
+                                session.stack_trace_view(project, window, cx).clone()
+                            });
+
+                            workspace.add_item_to_active_pane(
+                                Box::new(stack_trace_view),
+                                None,
+                                true,
+                                window,
+                                cx,
+                            );
+                        }
+                    },
+                )
                 .register_action(|workspace: &mut Workspace, _: &Start, window, cx| {
                     NewSessionModal::show(workspace, window, cx);
                 });

crates/debugger_ui/src/dropdown_menus.rs

@@ -0,0 +1,186 @@
+use gpui::Entity;
+use project::debugger::session::{ThreadId, ThreadStatus};
+use ui::{ContextMenu, DropdownMenu, DropdownStyle, Indicator, prelude::*};
+
+use crate::{
+    debugger_panel::DebugPanel,
+    session::{DebugSession, running::RunningState},
+};
+
+impl DebugPanel {
+    fn dropdown_label(label: impl Into<SharedString>) -> Label {
+        Label::new(label).size(LabelSize::Small)
+    }
+
+    pub fn render_session_menu(
+        &mut self,
+        active_session: Option<Entity<DebugSession>>,
+        running_state: Option<Entity<RunningState>>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Option<impl IntoElement> {
+        if let Some(running_state) = running_state {
+            let sessions = self.sessions().clone();
+            let weak = cx.weak_entity();
+            let running_state = running_state.read(cx);
+            let label = if let Some(active_session) = active_session {
+                active_session.read(cx).session(cx).read(cx).label()
+            } else {
+                SharedString::new_static("Unknown Session")
+            };
+
+            let is_terminated = running_state.session().read(cx).is_terminated();
+            let session_state_indicator = {
+                if is_terminated {
+                    Some(Indicator::dot().color(Color::Error))
+                } else {
+                    match running_state.thread_status(cx).unwrap_or_default() {
+                        project::debugger::session::ThreadStatus::Stopped => {
+                            Some(Indicator::dot().color(Color::Conflict))
+                        }
+                        _ => Some(Indicator::dot().color(Color::Success)),
+                    }
+                }
+            };
+
+            let trigger = h_flex()
+                .gap_2()
+                .when_some(session_state_indicator, |this, indicator| {
+                    this.child(indicator)
+                })
+                .justify_between()
+                .child(
+                    DebugPanel::dropdown_label(label)
+                        .when(is_terminated, |this| this.strikethrough()),
+                )
+                .into_any_element();
+
+            Some(
+                DropdownMenu::new_with_element(
+                    "debugger-session-list",
+                    trigger,
+                    ContextMenu::build(window, cx, move |mut this, _, cx| {
+                        let context_menu = cx.weak_entity();
+                        for session in sessions.into_iter() {
+                            let weak_session = session.downgrade();
+                            let weak_session_id = weak_session.entity_id();
+
+                            this = this.custom_entry(
+                                {
+                                    let weak = weak.clone();
+                                    let context_menu = context_menu.clone();
+                                    move |_, cx| {
+                                        weak_session
+                                            .read_with(cx, |session, cx| {
+                                                let context_menu = context_menu.clone();
+                                                let id: SharedString = format!(
+                                                    "debug-session-{}",
+                                                    session.session_id(cx).0
+                                                )
+                                                .into();
+                                                h_flex()
+                                                    .w_full()
+                                                    .group(id.clone())
+                                                    .justify_between()
+                                                    .child(session.label_element(cx))
+                                                    .child(
+                                                        IconButton::new(
+                                                            "close-debug-session",
+                                                            IconName::Close,
+                                                        )
+                                                        .visible_on_hover(id.clone())
+                                                        .icon_size(IconSize::Small)
+                                                        .on_click({
+                                                            let weak = weak.clone();
+                                                            move |_, window, cx| {
+                                                                weak.update(cx, |panel, cx| {
+                                                                    panel.close_session(
+                                                                        weak_session_id,
+                                                                        window,
+                                                                        cx,
+                                                                    );
+                                                                })
+                                                                .ok();
+                                                                context_menu
+                                                                    .update(cx, |this, cx| {
+                                                                        this.cancel(
+                                                                            &Default::default(),
+                                                                            window,
+                                                                            cx,
+                                                                        );
+                                                                    })
+                                                                    .ok();
+                                                            }
+                                                        }),
+                                                    )
+                                                    .into_any_element()
+                                            })
+                                            .unwrap_or_else(|_| div().into_any_element())
+                                    }
+                                },
+                                {
+                                    let weak = weak.clone();
+                                    move |window, cx| {
+                                        weak.update(cx, |panel, cx| {
+                                            panel.activate_session(session.clone(), window, cx);
+                                        })
+                                        .ok();
+                                    }
+                                },
+                            );
+                        }
+                        this
+                    }),
+                )
+                .style(DropdownStyle::Ghost),
+            )
+        } else {
+            None
+        }
+    }
+
+    pub(crate) fn render_thread_dropdown(
+        &self,
+        running_state: &Entity<RunningState>,
+        threads: Vec<(dap::Thread, ThreadStatus)>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Option<DropdownMenu> {
+        let running_state = running_state.clone();
+        let running_state_read = running_state.read(cx);
+        let thread_id = running_state_read.thread_id();
+        let session = running_state_read.session();
+        let session_id = session.read(cx).session_id();
+        let session_terminated = session.read(cx).is_terminated();
+        let selected_thread_name = threads
+            .iter()
+            .find(|(thread, _)| thread_id.map(|id| id.0) == Some(thread.id))
+            .map(|(thread, _)| thread.name.clone());
+
+        if let Some(selected_thread_name) = selected_thread_name {
+            let trigger = DebugPanel::dropdown_label(selected_thread_name).into_any_element();
+            Some(
+                DropdownMenu::new_with_element(
+                    ("thread-list", session_id.0),
+                    trigger,
+                    ContextMenu::build_eager(window, cx, move |mut this, _, _| {
+                        for (thread, _) in threads {
+                            let running_state = running_state.clone();
+                            let thread_id = thread.id;
+                            this = this.entry(thread.name, None, move |window, cx| {
+                                running_state.update(cx, |running_state, cx| {
+                                    running_state.select_thread(ThreadId(thread_id), window, cx);
+                                });
+                            });
+                        }
+                        this
+                    }),
+                )
+                .disabled(session_terminated)
+                .style(DropdownStyle::Ghost),
+            )
+        } else {
+            None
+        }
+    }
+}

crates/debugger_ui/src/new_session_modal.rs

@@ -1,4 +1,5 @@
 use collections::FxHashMap;
+use language::LanguageRegistry;
 use std::{
     borrow::Cow,
     ops::Not,
@@ -50,7 +51,6 @@ pub(super) struct NewSessionModal {
     attach_mode: Entity<AttachMode>,
     custom_mode: Entity<CustomMode>,
     debugger: Option<DebugAdapterName>,
-    task_contexts: Arc<TaskContexts>,
     save_scenario_state: Option<SaveScenarioState>,
     _subscriptions: [Subscription; 2],
 }
@@ -83,16 +83,9 @@ impl NewSessionModal {
             return;
         };
         let task_store = workspace.project().read(cx).task_store().clone();
+        let languages = workspace.app_state().languages.clone();
 
         cx.spawn_in(window, async move |workspace, cx| {
-            let task_contexts = Arc::from(
-                workspace
-                    .update_in(cx, |workspace, window, cx| {
-                        tasks_ui::task_contexts(workspace, window, cx)
-                    })?
-                    .await,
-            );
-
             workspace.update_in(cx, |workspace, window, cx| {
                 let workspace_handle = workspace.weak_handle();
                 workspace.toggle_modal(window, cx, |window, cx| {
@@ -100,12 +93,7 @@ impl NewSessionModal {
 
                     let launch_picker = cx.new(|cx| {
                         Picker::uniform_list(
-                            DebugScenarioDelegate::new(
-                                debug_panel.downgrade(),
-                                workspace_handle.clone(),
-                                task_store,
-                                task_contexts.clone(),
-                            ),
+                            DebugScenarioDelegate::new(debug_panel.downgrade(), task_store),
                             window,
                             cx,
                         )
@@ -126,6 +114,42 @@ impl NewSessionModal {
 
                     let custom_mode = CustomMode::new(None, window, cx);
 
+                    cx.spawn_in(window, {
+                        let workspace_handle = workspace_handle.clone();
+                        async move |this, cx| {
+                            let task_contexts = workspace_handle
+                                .update_in(cx, |workspace, window, cx| {
+                                    tasks_ui::task_contexts(workspace, window, cx)
+                                })?
+                                .await;
+
+                            this.update_in(cx, |this, window, cx| {
+                                if let Some(active_cwd) = task_contexts
+                                    .active_context()
+                                    .and_then(|context| context.cwd.clone())
+                                {
+                                    this.custom_mode.update(cx, |custom, cx| {
+                                        custom.load(active_cwd, window, cx);
+                                    });
+
+                                    this.debugger = None;
+                                }
+
+                                this.launch_picker.update(cx, |picker, cx| {
+                                    picker.delegate.task_contexts_loaded(
+                                        task_contexts,
+                                        languages,
+                                        window,
+                                        cx,
+                                    );
+                                    picker.refresh(window, cx);
+                                    cx.notify();
+                                });
+                            })
+                        }
+                    })
+                    .detach();
+
                     Self {
                         launch_picker,
                         attach_mode,
@@ -134,7 +158,6 @@ impl NewSessionModal {
                         mode: NewSessionMode::Launch,
                         debug_panel: debug_panel.downgrade(),
                         workspace: workspace_handle,
-                        task_contexts,
                         save_scenario_state: None,
                         _subscriptions,
                     }
@@ -146,7 +169,7 @@ impl NewSessionModal {
         .detach();
     }
 
-    fn render_mode(&self, window: &mut Window, cx: &mut Context<Self>) -> impl ui::IntoElement {
+    fn render_mode(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl ui::IntoElement {
         let dap_menu = self.adapter_drop_down_menu(window, cx);
         match self.mode {
             NewSessionMode::Attach => self.attach_mode.update(cx, |this, cx| {
@@ -201,8 +224,6 @@ impl NewSessionModal {
 
     fn start_new_session(&self, window: &mut Window, cx: &mut Context<Self>) {
         let Some(debugger) = self.debugger.as_ref() else {
-            // todo(debugger): show in UI.
-            log::error!("No debugger selected");
             return;
         };
 
@@ -219,10 +240,12 @@ impl NewSessionModal {
         };
 
         let debug_panel = self.debug_panel.clone();
-        let task_contexts = self.task_contexts.clone();
+        let Some(task_contexts) = self.task_contexts(cx) else {
+            return;
+        };
+        let task_context = task_contexts.active_context().cloned().unwrap_or_default();
+        let worktree_id = task_contexts.worktree();
         cx.spawn_in(window, async move |this, cx| {
-            let task_context = task_contexts.active_context().cloned().unwrap_or_default();
-            let worktree_id = task_contexts.worktree();
             debug_panel.update_in(cx, |debug_panel, window, cx| {
                 debug_panel.start_session(config, task_context, None, worktree_id, window, cx)
             })?;
@@ -256,33 +279,55 @@ impl NewSessionModal {
             cx.notify();
         })
     }
+
+    fn task_contexts<'a>(&self, cx: &'a mut Context<Self>) -> Option<&'a TaskContexts> {
+        self.launch_picker.read(cx).delegate.task_contexts.as_ref()
+    }
+
     fn adapter_drop_down_menu(
-        &self,
+        &mut self,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> ui::DropdownMenu {
         let workspace = self.workspace.clone();
         let weak = cx.weak_entity();
+        let active_buffer = self.task_contexts(cx).and_then(|tc| {
+            tc.active_item_context
+                .as_ref()
+                .and_then(|aic| aic.1.as_ref().map(|l| l.buffer.clone()))
+        });
+
+        let active_buffer_language = active_buffer
+            .and_then(|buffer| buffer.read(cx).language())
+            .cloned();
+
+        let mut available_adapters = workspace
+            .update(cx, |_, cx| DapRegistry::global(cx).enumerate_adapters())
+            .unwrap_or_default();
+        if let Some(language) = active_buffer_language {
+            available_adapters.sort_by_key(|adapter| {
+                language
+                    .config()
+                    .debuggers
+                    .get_index_of(adapter.0.as_ref())
+                    .unwrap_or(usize::MAX)
+            });
+        }
+
+        if self.debugger.is_none() {
+            self.debugger = available_adapters.first().cloned();
+        }
+
         let label = self
             .debugger
             .as_ref()
             .map(|d| d.0.clone())
             .unwrap_or_else(|| SELECT_DEBUGGER_LABEL.clone());
-        let active_buffer_language = self
-            .task_contexts
-            .active_item_context
-            .as_ref()
-            .and_then(|item| {
-                item.1
-                    .as_ref()
-                    .and_then(|location| location.buffer.read(cx).language())
-            })
-            .cloned();
 
         DropdownMenu::new(
             "dap-adapter-picker",
             label,
-            ContextMenu::build(window, cx, move |mut menu, _, cx| {
+            ContextMenu::build(window, cx, move |mut menu, _, _| {
                 let setter_for_name = |name: DebugAdapterName| {
                     let weak = weak.clone();
                     move |window: &mut Window, cx: &mut App| {
@@ -297,22 +342,10 @@ impl NewSessionModal {
                     }
                 };
 
-                let mut available_adapters = workspace
-                    .update(cx, |_, cx| DapRegistry::global(cx).enumerate_adapters())
-                    .unwrap_or_default();
-                if let Some(language) = active_buffer_language {
-                    available_adapters.sort_by_key(|adapter| {
-                        language
-                            .config()
-                            .debuggers
-                            .get_index_of(adapter.0.as_ref())
-                            .unwrap_or(usize::MAX)
-                    });
-                }
-
                 for adapter in available_adapters.into_iter() {
                     menu = menu.entry(adapter.0.clone(), None, setter_for_name(adapter.clone()));
                 }
+
                 menu
             }),
         )
@@ -505,7 +538,10 @@ impl Render for NewSessionModal {
                                             .debugger
                                             .as_ref()
                                             .and_then(|debugger| this.debug_scenario(&debugger, cx))
-                                            .zip(this.task_contexts.worktree())
+                                            .zip(
+                                                this.task_contexts(cx)
+                                                    .and_then(|tcx| tcx.worktree()),
+                                            )
                                             .and_then(|(scenario, worktree_id)| {
                                                 this.debug_panel
                                                     .update(cx, |panel, cx| {
@@ -734,6 +770,14 @@ impl CustomMode {
         })
     }
 
+    fn load(&mut self, cwd: PathBuf, window: &mut Window, cx: &mut App) {
+        self.cwd.update(cx, |editor, cx| {
+            if editor.is_empty(cx) {
+                editor.set_text(cwd.to_string_lossy(), window, cx);
+            }
+        });
+    }
+
     pub(super) fn debug_request(&self, cx: &App) -> task::LaunchRequest {
         let path = self.cwd.read(cx).text(cx);
         if cfg!(windows) {
@@ -762,6 +806,8 @@ impl CustomMode {
 
         let args = args.collect::<Vec<_>>();
 
+        let (program, path) = resolve_paths(program, path);
+
         task::LaunchRequest {
             program,
             cwd: path.is_empty().not().then(|| PathBuf::from(path)),
@@ -781,14 +827,6 @@ impl CustomMode {
             .w_full()
             .gap_3()
             .track_focus(&self.program.focus_handle(cx))
-            .child(
-                div().child(
-                    Label::new("Program")
-                        .size(ui::LabelSize::Small)
-                        .color(Color::Muted),
-                ),
-            )
-            .child(render_editor(&self.program, window, cx))
             .child(
                 h_flex()
                     .child(
@@ -799,10 +837,14 @@ impl CustomMode {
                     .gap(ui::DynamicSpacing::Base08.rems(cx))
                     .child(adapter_menu),
             )
+            .child(render_editor(&self.program, window, cx))
+            .child(render_editor(&self.cwd, window, cx))
             .child(
                 CheckboxWithLabel::new(
                     "debugger-stop-on-entry",
-                    Label::new("Stop on Entry").size(ui::LabelSize::Small),
+                    Label::new("Stop on Entry")
+                        .size(ui::LabelSize::Small)
+                        .color(Color::Muted),
                     self.stop_on_entry,
                     {
                         let this = cx.weak_entity();
@@ -859,33 +901,106 @@ impl AttachMode {
 
 pub(super) struct DebugScenarioDelegate {
     task_store: Entity<TaskStore>,
-    candidates: Option<Vec<(TaskSourceKind, DebugScenario)>>,
+    candidates: Vec<(Option<TaskSourceKind>, DebugScenario)>,
     selected_index: usize,
     matches: Vec<StringMatch>,
     prompt: String,
     debug_panel: WeakEntity<DebugPanel>,
-    workspace: WeakEntity<Workspace>,
-    task_contexts: Arc<TaskContexts>,
+    task_contexts: Option<TaskContexts>,
+    divider_index: Option<usize>,
+    last_used_candidate_index: Option<usize>,
 }
 
 impl DebugScenarioDelegate {
-    pub(super) fn new(
-        debug_panel: WeakEntity<DebugPanel>,
-        workspace: WeakEntity<Workspace>,
-        task_store: Entity<TaskStore>,
-        task_contexts: Arc<TaskContexts>,
-    ) -> Self {
+    pub(super) fn new(debug_panel: WeakEntity<DebugPanel>, task_store: Entity<TaskStore>) -> Self {
         Self {
             task_store,
-            candidates: None,
+            candidates: Vec::default(),
             selected_index: 0,
             matches: Vec::new(),
             prompt: String::new(),
             debug_panel,
-            workspace,
-            task_contexts,
+            task_contexts: None,
+            divider_index: None,
+            last_used_candidate_index: None,
         }
     }
+
+    fn get_scenario_kind(
+        languages: &Arc<LanguageRegistry>,
+        dap_registry: &DapRegistry,
+        scenario: DebugScenario,
+    ) -> (Option<TaskSourceKind>, DebugScenario) {
+        let language_names = languages.language_names();
+        let language = dap_registry
+            .adapter_language(&scenario.adapter)
+            .map(|language| TaskSourceKind::Language {
+                name: language.into(),
+            });
+
+        let language = language.or_else(|| {
+            scenario
+                .request
+                .as_ref()
+                .and_then(|request| match request {
+                    DebugRequest::Launch(launch) => launch
+                        .program
+                        .rsplit_once(".")
+                        .and_then(|split| languages.language_name_for_extension(split.1))
+                        .map(|name| TaskSourceKind::Language { name: name.into() }),
+                    _ => None,
+                })
+                .or_else(|| {
+                    scenario.label.split_whitespace().find_map(|word| {
+                        language_names
+                            .iter()
+                            .find(|name| name.eq_ignore_ascii_case(word))
+                            .map(|name| TaskSourceKind::Language {
+                                name: name.to_owned().into(),
+                            })
+                    })
+                })
+        });
+
+        (language, scenario)
+    }
+
+    pub fn task_contexts_loaded(
+        &mut self,
+        task_contexts: TaskContexts,
+        languages: Arc<LanguageRegistry>,
+        _window: &mut Window,
+        cx: &mut Context<Picker<Self>>,
+    ) {
+        self.task_contexts = Some(task_contexts);
+
+        let (recent, scenarios) = self
+            .task_store
+            .update(cx, |task_store, cx| {
+                task_store.task_inventory().map(|inventory| {
+                    inventory.update(cx, |inventory, cx| {
+                        inventory.list_debug_scenarios(self.task_contexts.as_ref().unwrap(), cx)
+                    })
+                })
+            })
+            .unwrap_or_default();
+
+        if !recent.is_empty() {
+            self.last_used_candidate_index = Some(recent.len() - 1);
+        }
+
+        let dap_registry = cx.global::<DapRegistry>();
+
+        self.candidates = recent
+            .into_iter()
+            .map(|scenario| Self::get_scenario_kind(&languages, &dap_registry, scenario))
+            .chain(scenarios.into_iter().map(|(kind, scenario)| {
+                let (language, scenario) =
+                    Self::get_scenario_kind(&languages, &dap_registry, scenario);
+                (language.or(Some(kind)), scenario)
+            }))
+            .collect();
+    }
 }
 
 impl PickerDelegate for DebugScenarioDelegate {
@@ -919,53 +1034,15 @@ impl PickerDelegate for DebugScenarioDelegate {
         cx: &mut Context<picker::Picker<Self>>,
     ) -> gpui::Task<()> {
         let candidates = self.candidates.clone();
-        let workspace = self.workspace.clone();
-        let task_store = self.task_store.clone();
 
         cx.spawn_in(window, async move |picker, cx| {
-            let candidates: Vec<_> = match &candidates {
-                Some(candidates) => candidates
-                    .into_iter()
-                    .enumerate()
-                    .map(|(index, (_, candidate))| {
-                        StringMatchCandidate::new(index, candidate.label.as_ref())
-                    })
-                    .collect(),
-                None => {
-                    let worktree_ids: Vec<_> = workspace
-                        .update(cx, |this, cx| {
-                            this.visible_worktrees(cx)
-                                .map(|tree| tree.read(cx).id())
-                                .collect()
-                        })
-                        .ok()
-                        .unwrap_or_default();
-
-                    let scenarios: Vec<_> = task_store
-                        .update(cx, |task_store, cx| {
-                            task_store.task_inventory().map(|item| {
-                                item.read(cx).list_debug_scenarios(worktree_ids.into_iter())
-                            })
-                        })
-                        .ok()
-                        .flatten()
-                        .unwrap_or_default();
-
-                    picker
-                        .update(cx, |picker, _| {
-                            picker.delegate.candidates = Some(scenarios.clone());
-                        })
-                        .ok();
-
-                    scenarios
-                        .into_iter()
-                        .enumerate()
-                        .map(|(index, (_, candidate))| {
-                            StringMatchCandidate::new(index, candidate.label.as_ref())
-                        })
-                        .collect()
-                }
-            };
+            let candidates: Vec<_> = candidates
+                .into_iter()
+                .enumerate()
+                .map(|(index, (_, candidate))| {
+                    StringMatchCandidate::new(index, candidate.label.as_ref())
+                })
+                .collect();
 
             let matches = fuzzy::match_strings(
                 &candidates,
@@ -984,6 +1061,13 @@ impl PickerDelegate for DebugScenarioDelegate {
                     delegate.matches = matches;
                     delegate.prompt = query;
 
+                    delegate.divider_index = delegate.last_used_candidate_index.and_then(|index| {
+                        let index = delegate
+                            .matches
+                            .partition_point(|matching_task| matching_task.candidate_id <= index);
+                        Some(index).and_then(|index| (index != 0).then(|| index - 1))
+                    });
+
                     if delegate.matches.is_empty() {
                         delegate.selected_index = 0;
                     } else {
@@ -995,34 +1079,47 @@ impl PickerDelegate for DebugScenarioDelegate {
         })
     }
 
+    fn separators_after_indices(&self) -> Vec<usize> {
+        if let Some(i) = self.divider_index {
+            vec![i]
+        } else {
+            Vec::new()
+        }
+    }
+
     fn confirm(&mut self, _: bool, window: &mut Window, cx: &mut Context<picker::Picker<Self>>) {
         let debug_scenario = self
             .matches
             .get(self.selected_index())
-            .and_then(|match_candidate| {
-                self.candidates
-                    .as_ref()
-                    .map(|candidates| candidates[match_candidate.candidate_id].clone())
-            });
+            .and_then(|match_candidate| self.candidates.get(match_candidate.candidate_id).cloned());
 
-        let Some((task_source_kind, debug_scenario)) = debug_scenario else {
+        let Some((_, mut debug_scenario)) = debug_scenario else {
             return;
         };
 
-        let (task_context, worktree_id) = if let TaskSourceKind::Worktree {
-            id: worktree_id,
-            directory_in_worktree: _,
-            id_base: _,
-        } = task_source_kind
+        let (task_context, worktree_id) = self
+            .task_contexts
+            .as_ref()
+            .and_then(|task_contexts| {
+                Some((
+                    task_contexts.active_context().cloned()?,
+                    task_contexts.worktree(),
+                ))
+            })
+            .unwrap_or_default();
+
+        if let Some(launch_config) =
+            debug_scenario
+                .request
+                .as_mut()
+                .and_then(|request| match request {
+                    DebugRequest::Launch(launch) => Some(launch),
+                    _ => None,
+                })
         {
-            self.task_contexts
-                .task_context_for_worktree_id(worktree_id)
-                .cloned()
-                .map(|context| (context, Some(worktree_id)))
-        } else {
-            None
+            let (program, _) = resolve_paths(launch_config.program.clone(), String::new());
+            launch_config.program = program;
         }
-        .unwrap_or_default();
 
         self.debug_panel
             .update(cx, |panel, cx| {
@@ -1052,10 +1149,19 @@ impl PickerDelegate for DebugScenarioDelegate {
             char_count: hit.string.chars().count(),
             color: Color::Default,
         };
+        let task_kind = &self.candidates[hit.candidate_id].0;
 
-        let icon = Icon::new(IconName::FileTree)
-            .color(Color::Muted)
-            .size(ui::IconSize::Small);
+        let icon = match task_kind {
+            Some(TaskSourceKind::Lsp(..)) => Some(Icon::new(IconName::Bolt)),
+            Some(TaskSourceKind::UserInput) => Some(Icon::new(IconName::Terminal)),
+            Some(TaskSourceKind::AbsPath { .. }) => Some(Icon::new(IconName::Settings)),
+            Some(TaskSourceKind::Worktree { .. }) => Some(Icon::new(IconName::FileTree)),
+            Some(TaskSourceKind::Language { name }) => file_icons::FileIcons::get(cx)
+                .get_icon_for_type(&name.to_lowercase(), cx)
+                .map(Icon::from_path),
+            None => Some(Icon::new(IconName::HistoryRerun)),
+        }
+        .map(|icon| icon.color(Color::Muted).size(ui::IconSize::Small));
 
         Some(
             ListItem::new(SharedString::from(format!("debug-scenario-selection-{ix}")))
@@ -1067,3 +1173,35 @@ impl PickerDelegate for DebugScenarioDelegate {
         )
     }
 }
+
+fn resolve_paths(program: String, path: String) -> (String, String) {
+    let program = if let Some(program) = program.strip_prefix('~') {
+        format!(
+            "$ZED_WORKTREE_ROOT{}{}",
+            std::path::MAIN_SEPARATOR,
+            &program
+        )
+    } else if !program.starts_with(std::path::MAIN_SEPARATOR) {
+        format!(
+            "$ZED_WORKTREE_ROOT{}{}",
+            std::path::MAIN_SEPARATOR,
+            &program
+        )
+    } else {
+        program
+    };
+
+    let path = if path.starts_with('~') && !path.is_empty() {
+        format!(
+            "$ZED_WORKTREE_ROOT{}{}",
+            std::path::MAIN_SEPARATOR,
+            &path[1..]
+        )
+    } else if !path.starts_with(std::path::MAIN_SEPARATOR) && !path.is_empty() {
+        format!("$ZED_WORKTREE_ROOT{}{}", std::path::MAIN_SEPARATOR, &path)
+    } else {
+        path
+    };
+
+    (program, path)
+}

crates/debugger_ui/src/persistence.rs

@@ -278,7 +278,7 @@ pub(crate) fn deserialize_pane_layout(
                         cx,
                     )),
                     DebuggerPaneItem::Console => Box::new(SubView::new(
-                        pane.focus_handle(cx),
+                        console.focus_handle(cx),
                         console.clone().into(),
                         DebuggerPaneItem::Console,
                         Some(Box::new({
@@ -292,7 +292,7 @@ pub(crate) fn deserialize_pane_layout(
                         cx,
                     )),
                     DebuggerPaneItem::Terminal => Box::new(SubView::new(
-                        pane.focus_handle(cx),
+                        terminal.focus_handle(cx),
                         terminal.clone().into(),
                         DebuggerPaneItem::Terminal,
                         None,

crates/debugger_ui/src/session.rs

@@ -1,7 +1,6 @@
 pub mod running;
 
-use std::sync::OnceLock;
-
+use crate::{StackTraceView, debugger_panel::DebugPanel, persistence::SerializedLayout};
 use dap::client::SessionId;
 use gpui::{
     App, Axis, Entity, EventEmitter, FocusHandle, Focusable, Subscription, Task, WeakEntity,
@@ -11,21 +10,21 @@ use project::debugger::session::Session;
 use project::worktree_store::WorktreeStore;
 use rpc::proto;
 use running::RunningState;
+use std::{cell::OnceCell, sync::OnceLock};
 use ui::{Indicator, prelude::*};
 use workspace::{
     CollaboratorId, FollowableItem, ViewId, Workspace,
     item::{self, Item},
 };
 
-use crate::{debugger_panel::DebugPanel, persistence::SerializedLayout};
-
 pub struct DebugSession {
     remote_id: Option<workspace::ViewId>,
     running_state: Entity<RunningState>,
     label: OnceLock<SharedString>,
+    stack_trace_view: OnceCell<Entity<StackTraceView>>,
     _debug_panel: WeakEntity<DebugPanel>,
     _worktree_store: WeakEntity<WorktreeStore>,
-    _workspace: WeakEntity<Workspace>,
+    workspace: WeakEntity<Workspace>,
     _subscriptions: [Subscription; 1],
 }
 
@@ -66,8 +65,9 @@ impl DebugSession {
             running_state,
             label: OnceLock::new(),
             _debug_panel,
+            stack_trace_view: OnceCell::new(),
             _worktree_store: project.read(cx).worktree_store().downgrade(),
-            _workspace: workspace,
+            workspace,
         })
     }
 
@@ -75,6 +75,32 @@ impl DebugSession {
         self.running_state.read(cx).session_id()
     }
 
+    pub(crate) fn stack_trace_view(
+        &mut self,
+        project: &Entity<Project>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> &Entity<StackTraceView> {
+        let workspace = self.workspace.clone();
+        let running_state = self.running_state.clone();
+
+        self.stack_trace_view.get_or_init(|| {
+            let stackframe_list = running_state.read(cx).stack_frame_list().clone();
+
+            let stack_frame_view = cx.new(|cx| {
+                StackTraceView::new(
+                    workspace.clone(),
+                    project.clone(),
+                    stackframe_list,
+                    window,
+                    cx,
+                )
+            });
+
+            stack_frame_view
+        })
+    }
+
     pub fn session(&self, cx: &App) -> Entity<Session> {
         self.running_state.read(cx).session().clone()
     }
@@ -131,7 +157,11 @@ impl DebugSession {
             .gap_2()
             .when_some(icon, |this, indicator| this.child(indicator))
             .justify_between()
-            .child(Label::new(label).when(is_terminated, |this| this.strikethrough()))
+            .child(
+                Label::new(label)
+                    .size(LabelSize::Small)
+                    .when(is_terminated, |this| this.strikethrough()),
+            )
             .into_any_element()
     }
 }

crates/debugger_ui/src/session/running.rs

@@ -43,11 +43,10 @@ use task::{
 };
 use terminal_view::TerminalView;
 use ui::{
-    ActiveTheme, AnyElement, App, ButtonCommon as _, Clickable as _, Context, ContextMenu,
-    Disableable, DropdownMenu, FluentBuilder, IconButton, IconName, IconSize, InteractiveElement,
-    IntoElement, Label, LabelCommon as _, ParentElement, Render, SharedString,
-    StatefulInteractiveElement, Styled, Tab, Tooltip, VisibleOnHover, VisualContext, Window, div,
-    h_flex, v_flex,
+    ActiveTheme, AnyElement, App, ButtonCommon as _, Clickable as _, Context, FluentBuilder,
+    IconButton, IconName, IconSize, InteractiveElement, IntoElement, Label, LabelCommon as _,
+    ParentElement, Render, SharedString, StatefulInteractiveElement, Styled, Tab, Tooltip,
+    VisibleOnHover, VisualContext, Window, div, h_flex, v_flex,
 };
 use util::ResultExt;
 use variable_list::VariableList;
@@ -78,6 +77,12 @@ pub struct RunningState {
     _schedule_serialize: Option<Task<()>>,
 }
 
+impl RunningState {
+    pub(crate) fn thread_id(&self) -> Option<ThreadId> {
+        self.thread_id
+    }
+}
+
 impl Render for RunningState {
     fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         let zoomed_pane = self
@@ -119,7 +124,7 @@ impl Render for RunningState {
 
 pub(crate) struct SubView {
     inner: AnyView,
-    pane_focus_handle: FocusHandle,
+    item_focus_handle: FocusHandle,
     kind: DebuggerPaneItem,
     show_indicator: Box<dyn Fn(&App) -> bool>,
     hovered: bool,
@@ -127,7 +132,7 @@ pub(crate) struct SubView {
 
 impl SubView {
     pub(crate) fn new(
-        pane_focus_handle: FocusHandle,
+        item_focus_handle: FocusHandle,
         view: AnyView,
         kind: DebuggerPaneItem,
         show_indicator: Option<Box<dyn Fn(&App) -> bool>>,
@@ -136,7 +141,7 @@ impl SubView {
         cx.new(|_| Self {
             kind,
             inner: view,
-            pane_focus_handle,
+            item_focus_handle,
             show_indicator: show_indicator.unwrap_or(Box::new(|_| false)),
             hovered: false,
         })
@@ -148,7 +153,7 @@ impl SubView {
 }
 impl Focusable for SubView {
     fn focus_handle(&self, _: &App) -> FocusHandle {
-        self.pane_focus_handle.clone()
+        self.item_focus_handle.clone()
     }
 }
 impl EventEmitter<()> for SubView {}
@@ -199,7 +204,7 @@ impl Render for SubView {
             .size_full()
             // Add border unconditionally to prevent layout shifts on focus changes.
             .border_1()
-            .when(self.pane_focus_handle.contains_focused(window, cx), |el| {
+            .when(self.item_focus_handle.contains_focused(window, cx), |el| {
                 el.border_color(cx.theme().colors().pane_focused_border)
             })
             .child(self.inner.clone())
@@ -515,7 +520,7 @@ impl Focusable for DebugTerminal {
 }
 
 impl RunningState {
-    pub fn new(
+    pub(crate) fn new(
         session: Entity<Session>,
         project: Entity<Project>,
         workspace: WeakEntity<Workspace>,
@@ -1202,7 +1207,9 @@ impl RunningState {
             .as_ref()
             .and_then(|pane| self.panes.find_pane_in_direction(pane, direction, cx))
         {
-            window.focus(&pane.focus_handle(cx));
+            pane.update(cx, |pane, cx| {
+                pane.focus_active_item(window, cx);
+            })
         } else {
             self.workspace
                 .update(cx, |workspace, cx| {
@@ -1212,10 +1219,16 @@ impl RunningState {
         }
     }
 
-    pub(crate) fn go_to_selected_stack_frame(&self, window: &Window, cx: &mut Context<Self>) {
+    pub(crate) fn go_to_selected_stack_frame(&self, window: &mut Window, cx: &mut Context<Self>) {
         if self.thread_id.is_some() {
             self.stack_frame_list
-                .update(cx, |list, cx| list.go_to_selected_stack_frame(window, cx));
+                .update(cx, |list, cx| {
+                    let Some(stack_frame_id) = list.opened_stack_frame_id() else {
+                        return Task::ready(Ok(()));
+                    };
+                    list.go_to_stack_frame(stack_frame_id, window, cx)
+                })
+                .detach();
         }
     }
 
@@ -1232,11 +1245,10 @@ impl RunningState {
     }
 
     pub(crate) fn selected_stack_frame_id(&self, cx: &App) -> Option<dap::StackFrameId> {
-        self.stack_frame_list.read(cx).selected_stack_frame_id()
+        self.stack_frame_list.read(cx).opened_stack_frame_id()
     }
 
-    #[cfg(test)]
-    pub fn stack_frame_list(&self) -> &Entity<StackFrameList> {
+    pub(crate) fn stack_frame_list(&self) -> &Entity<StackFrameList> {
         &self.stack_frame_list
     }
 
@@ -1310,7 +1322,12 @@ impl RunningState {
             .map(|id| self.session().read(cx).thread_status(id))
     }
 
-    fn select_thread(&mut self, thread_id: ThreadId, window: &mut Window, cx: &mut Context<Self>) {
+    pub(crate) fn select_thread(
+        &mut self,
+        thread_id: ThreadId,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
         if self.thread_id.is_some_and(|id| id == thread_id) {
             return;
         }
@@ -1447,38 +1464,6 @@ impl RunningState {
         });
     }
 
-    pub(crate) fn thread_dropdown(
-        &self,
-        window: &mut Window,
-        cx: &mut Context<'_, RunningState>,
-    ) -> DropdownMenu {
-        let state = cx.entity();
-        let session_terminated = self.session.read(cx).is_terminated();
-        let threads = self.session.update(cx, |this, cx| this.threads(cx));
-        let selected_thread_name = threads
-            .iter()
-            .find(|(thread, _)| self.thread_id.map(|id| id.0) == Some(thread.id))
-            .map(|(thread, _)| thread.name.clone())
-            .unwrap_or("Threads".to_owned());
-        DropdownMenu::new(
-            ("thread-list", self.session_id.0),
-            selected_thread_name,
-            ContextMenu::build_eager(window, cx, move |mut this, _, _| {
-                for (thread, _) in threads {
-                    let state = state.clone();
-                    let thread_id = thread.id;
-                    this = this.entry(thread.name, None, move |window, cx| {
-                        state.update(cx, |state, cx| {
-                            state.select_thread(ThreadId(thread_id), window, cx);
-                        });
-                    });
-                }
-                this
-            }),
-        )
-        .disabled(session_terminated)
-    }
-
     fn default_pane_layout(
         project: Entity<Project>,
         workspace: &WeakEntity<Workspace>,

crates/debugger_ui/src/session/running/breakpoint_list.rs

@@ -21,8 +21,8 @@ use project::{
 use ui::{
     App, Clickable, Color, Context, Div, Icon, IconButton, IconName, Indicator, InteractiveElement,
     IntoElement, Label, LabelCommon, LabelSize, ListItem, ParentElement, Render, RenderOnce,
-    Scrollbar, ScrollbarState, SharedString, StatefulInteractiveElement, Styled, Window, div,
-    h_flex, px, v_flex,
+    Scrollbar, ScrollbarState, SharedString, StatefulInteractiveElement, Styled, Tooltip, Window,
+    div, h_flex, px, v_flex,
 };
 use util::{ResultExt, maybe};
 use workspace::Workspace;
@@ -259,6 +259,11 @@ impl LineBreakpoint {
                 dir, name, line
             )))
             .cursor_pointer()
+            .tooltip(Tooltip::text(if breakpoint.state.is_enabled() {
+                "Disable Breakpoint"
+            } else {
+                "Enable Breakpoint"
+            }))
             .on_click({
                 let weak = weak.clone();
                 let path = path.clone();
@@ -290,6 +295,9 @@ impl LineBreakpoint {
         )))
         .start_slot(indicator)
         .rounded()
+        .on_secondary_mouse_down(|_, _, cx| {
+            cx.stop_propagation();
+        })
         .end_hover_slot(
             IconButton::new(
                 SharedString::from(format!(
@@ -423,12 +431,20 @@ impl ExceptionBreakpoint {
             self.id
         )))
         .rounded()
+        .on_secondary_mouse_down(|_, _, cx| {
+            cx.stop_propagation();
+        })
         .start_slot(
             div()
                 .id(SharedString::from(format!(
                     "exception-breakpoint-ui-item-{}-click-handler",
                     self.id
                 )))
+                .tooltip(Tooltip::text(if self.is_enabled {
+                    "Disable Exception Breakpoint"
+                } else {
+                    "Enable Exception Breakpoint"
+                }))
                 .on_click(move |_, _, cx| {
                     list.update(cx, |this, cx| {
                         this.session.update(cx, |this, cx| {

crates/debugger_ui/src/session/running/console.rs

@@ -45,6 +45,7 @@ impl Console {
             let mut editor = Editor::multi_line(window, cx);
             editor.move_to_end(&editor::actions::MoveToEnd, window, cx);
             editor.set_read_only(true);
+            editor.disable_scrollbars_and_minimap(window, cx);
             editor.set_show_gutter(false, cx);
             editor.set_show_runnables(false, cx);
             editor.set_show_breakpoints(false, cx);
@@ -76,8 +77,14 @@ impl Console {
             editor
         });
 
-        let _subscriptions =
-            vec![cx.subscribe(&stack_frame_list, Self::handle_stack_frame_list_events)];
+        let _subscriptions = vec![
+            cx.subscribe(&stack_frame_list, Self::handle_stack_frame_list_events),
+            cx.on_focus_in(&focus_handle, window, |console, window, cx| {
+                if console.is_running(cx) {
+                    console.query_bar.focus_handle(cx).focus(window);
+                }
+            }),
+        ];
 
         Self {
             session,
@@ -97,7 +104,7 @@ impl Console {
         &self.console
     }
 
-    fn is_local(&self, cx: &Context<Self>) -> bool {
+    fn is_running(&self, cx: &Context<Self>) -> bool {
         self.session.read(cx).is_local()
     }
 
@@ -109,6 +116,7 @@ impl Console {
     ) {
         match event {
             StackFrameListEvent::SelectedStackFrameChanged(_) => cx.notify(),
+            StackFrameListEvent::BuiltEntries => {}
         }
     }
 
@@ -142,8 +150,9 @@ impl Console {
     pub fn evaluate(&mut self, _: &Confirm, window: &mut Window, cx: &mut Context<Self>) {
         let expression = self.query_bar.update(cx, |editor, cx| {
             let expression = editor.text(cx);
-
-            editor.clear(window, cx);
+            cx.defer_in(window, |editor, window, cx| {
+                editor.clear(window, cx);
+            });
 
             expression
         });
@@ -153,7 +162,7 @@ impl Console {
                 .evaluate(
                     expression,
                     Some(dap::EvaluateArgumentsContext::Repl),
-                    self.stack_frame_list.read(cx).selected_stack_frame_id(),
+                    self.stack_frame_list.read(cx).opened_stack_frame_id(),
                     None,
                     cx,
                 )
@@ -218,7 +227,7 @@ impl Render for Console {
             .on_action(cx.listener(Self::evaluate))
             .size_full()
             .child(self.render_console(cx))
-            .when(self.is_local(cx), |this| {
+            .when(self.is_running(cx), |this| {
                 this.child(Divider::horizontal())
                     .child(self.render_query_bar(cx))
             })
@@ -380,7 +389,7 @@ impl ConsoleQueryBarCompletionProvider {
     ) -> Task<Result<Option<Vec<Completion>>>> {
         let completion_task = console.update(cx, |console, cx| {
             console.session.update(cx, |state, cx| {
-                let frame_id = console.stack_frame_list.read(cx).selected_stack_frame_id();
+                let frame_id = console.stack_frame_list.read(cx).opened_stack_frame_id();
 
                 state.completions(
                     CompletionsQuery::new(buffer.read(cx), buffer_position, frame_id),

crates/debugger_ui/src/session/running/module_list.rs

@@ -1,7 +1,8 @@
 use anyhow::anyhow;
+use dap::Module;
 use gpui::{
-    AnyElement, Empty, Entity, FocusHandle, Focusable, ListState, MouseButton, Stateful,
-    Subscription, WeakEntity, list,
+    AnyElement, Entity, FocusHandle, Focusable, MouseButton, ScrollStrategy, Stateful,
+    Subscription, Task, UniformListScrollHandle, WeakEntity, uniform_list,
 };
 use project::{
     ProjectItem as _, ProjectPath,
@@ -9,16 +10,17 @@ use project::{
 };
 use std::{path::Path, sync::Arc};
 use ui::{Scrollbar, ScrollbarState, prelude::*};
-use util::maybe;
 use workspace::Workspace;
 
 pub struct ModuleList {
-    list: ListState,
-    invalidate: bool,
+    scroll_handle: UniformListScrollHandle,
+    selected_ix: Option<usize>,
     session: Entity<Session>,
     workspace: WeakEntity<Workspace>,
     focus_handle: FocusHandle,
     scrollbar_state: ScrollbarState,
+    entries: Vec<Module>,
+    _rebuild_task: Task<()>,
     _subscription: Subscription,
 }
 
@@ -28,38 +30,43 @@ impl ModuleList {
         workspace: WeakEntity<Workspace>,
         cx: &mut Context<Self>,
     ) -> Self {
-        let weak_entity = cx.weak_entity();
         let focus_handle = cx.focus_handle();
 
-        let list = ListState::new(
-            0,
-            gpui::ListAlignment::Top,
-            px(1000.),
-            move |ix, _window, cx| {
-                weak_entity
-                    .upgrade()
-                    .map(|module_list| module_list.update(cx, |this, cx| this.render_entry(ix, cx)))
-                    .unwrap_or(div().into_any())
-            },
-        );
-
         let _subscription = cx.subscribe(&session, |this, _, event, cx| match event {
             SessionEvent::Stopped(_) | SessionEvent::Modules => {
-                this.invalidate = true;
-                cx.notify();
+                this.schedule_rebuild(cx);
             }
             _ => {}
         });
 
-        Self {
-            scrollbar_state: ScrollbarState::new(list.clone()),
-            list,
+        let scroll_handle = UniformListScrollHandle::new();
+
+        let mut this = Self {
+            scrollbar_state: ScrollbarState::new(scroll_handle.clone()),
+            scroll_handle,
             session,
             workspace,
             focus_handle,
+            entries: Vec::new(),
+            selected_ix: None,
             _subscription,
-            invalidate: true,
-        }
+            _rebuild_task: Task::ready(()),
+        };
+        this.schedule_rebuild(cx);
+        this
+    }
+
+    fn schedule_rebuild(&mut self, cx: &mut Context<Self>) {
+        self._rebuild_task = cx.spawn(async move |this, cx| {
+            this.update(cx, |this, cx| {
+                let modules = this
+                    .session
+                    .update(cx, |session, cx| session.modules(cx).to_owned());
+                this.entries = modules;
+                cx.notify();
+            })
+            .ok();
+        });
     }
 
     fn open_module(&mut self, path: Arc<Path>, window: &mut Window, cx: &mut Context<Self>) {
@@ -111,36 +118,40 @@ impl ModuleList {
 
             anyhow::Ok(())
         })
-        .detach_and_log_err(cx);
+        .detach();
     }
 
     fn render_entry(&mut self, ix: usize, cx: &mut Context<Self>) -> AnyElement {
-        let Some(module) = maybe!({
-            self.session
-                .update(cx, |state, cx| state.modules(cx).get(ix).cloned())
-        }) else {
-            return Empty.into_any();
-        };
+        let module = self.entries[ix].clone();
 
         v_flex()
             .rounded_md()
             .w_full()
             .group("")
             .id(("module-list", ix))
+            .on_any_mouse_down(|_, _, cx| {
+                cx.stop_propagation();
+            })
             .when(module.path.is_some(), |this| {
                 this.on_click({
-                    let path = module.path.as_deref().map(|path| Arc::<Path>::from(Path::new(path)));
+                    let path = module
+                        .path
+                        .as_deref()
+                        .map(|path| Arc::<Path>::from(Path::new(path)));
                     cx.listener(move |this, _, window, cx| {
+                        this.selected_ix = Some(ix);
                         if let Some(path) = path.as_ref() {
                             this.open_module(path.clone(), window, cx);
-                        } else {
-                            log::error!("Wasn't able to find module path, but was still able to click on module list entry");
                         }
+                        cx.notify();
                     })
                 })
             })
             .p_1()
             .hover(|s| s.bg(cx.theme().colors().element_hover))
+            .when(Some(ix) == self.selected_ix, |s| {
+                s.bg(cx.theme().colors().element_hover)
+            })
             .child(h_flex().gap_0p5().text_ui_sm(cx).child(module.name.clone()))
             .child(
                 h_flex()
@@ -188,6 +199,96 @@ impl ModuleList {
             .cursor_default()
             .children(Scrollbar::vertical(self.scrollbar_state.clone()))
     }
+
+    fn confirm(&mut self, _: &menu::Confirm, window: &mut Window, cx: &mut Context<Self>) {
+        let Some(ix) = self.selected_ix else { return };
+        let Some(entry) = self.entries.get(ix) else {
+            return;
+        };
+        let Some(path) = entry.path.as_deref() else {
+            return;
+        };
+        let path = Arc::from(Path::new(path));
+        self.open_module(path, window, cx);
+    }
+
+    fn select_ix(&mut self, ix: Option<usize>, cx: &mut Context<Self>) {
+        self.selected_ix = ix;
+        if let Some(ix) = ix {
+            self.scroll_handle
+                .scroll_to_item(ix, ScrollStrategy::Center);
+        }
+        cx.notify();
+    }
+
+    fn select_next(&mut self, _: &menu::SelectNext, _window: &mut Window, cx: &mut Context<Self>) {
+        let ix = match self.selected_ix {
+            _ if self.entries.len() == 0 => None,
+            None => Some(0),
+            Some(ix) => {
+                if ix == self.entries.len() - 1 {
+                    Some(0)
+                } else {
+                    Some(ix + 1)
+                }
+            }
+        };
+        self.select_ix(ix, cx);
+    }
+
+    fn select_previous(
+        &mut self,
+        _: &menu::SelectPrevious,
+        _window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let ix = match self.selected_ix {
+            _ if self.entries.len() == 0 => None,
+            None => Some(self.entries.len() - 1),
+            Some(ix) => {
+                if ix == 0 {
+                    Some(self.entries.len() - 1)
+                } else {
+                    Some(ix - 1)
+                }
+            }
+        };
+        self.select_ix(ix, cx);
+    }
+
+    fn select_first(
+        &mut self,
+        _: &menu::SelectFirst,
+        _window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let ix = if self.entries.len() > 0 {
+            Some(0)
+        } else {
+            None
+        };
+        self.select_ix(ix, cx);
+    }
+
+    fn select_last(&mut self, _: &menu::SelectLast, _window: &mut Window, cx: &mut Context<Self>) {
+        let ix = if self.entries.len() > 0 {
+            Some(self.entries.len() - 1)
+        } else {
+            None
+        };
+        self.select_ix(ix, cx);
+    }
+
+    fn render_list(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        uniform_list(
+            cx.entity(),
+            "module-list",
+            self.entries.len(),
+            |this, range, _window, cx| range.map(|ix| this.render_entry(ix, cx)).collect(),
+        )
+        .track_scroll(self.scroll_handle.clone())
+        .size_full()
+    }
 }
 
 impl Focusable for ModuleList {
@@ -197,21 +298,17 @@ impl Focusable for ModuleList {
 }
 
 impl Render for ModuleList {
-    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
-        if self.invalidate {
-            let len = self
-                .session
-                .update(cx, |session, cx| session.modules(cx).len());
-            self.list.reset(len);
-            self.invalidate = false;
-            cx.notify();
-        }
-
+    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         div()
             .track_focus(&self.focus_handle)
+            .on_action(cx.listener(Self::select_last))
+            .on_action(cx.listener(Self::select_first))
+            .on_action(cx.listener(Self::select_next))
+            .on_action(cx.listener(Self::select_previous))
+            .on_action(cx.listener(Self::confirm))
             .size_full()
             .p_1()
-            .child(list(self.list.clone()).size_full())
+            .child(self.render_list(window, cx))
             .child(self.render_vertical_scrollbar(cx))
     }
 }

crates/debugger_ui/src/session/running/stack_frame_list.rs

@@ -5,35 +5,37 @@ use std::time::Duration;
 use anyhow::{Result, anyhow};
 use dap::StackFrameId;
 use gpui::{
-    AnyElement, Entity, EventEmitter, FocusHandle, Focusable, ListState, MouseButton, Stateful,
-    Subscription, Task, WeakEntity, list,
+    AnyElement, Entity, EventEmitter, FocusHandle, Focusable, MouseButton, ScrollStrategy,
+    Stateful, Subscription, Task, UniformListScrollHandle, WeakEntity, uniform_list,
 };
 
+use crate::StackTraceView;
 use language::PointUtf16;
 use project::debugger::breakpoint_store::ActiveStackFrame;
 use project::debugger::session::{Session, SessionEvent, StackFrame};
 use project::{ProjectItem, ProjectPath};
 use ui::{Scrollbar, ScrollbarState, Tooltip, prelude::*};
-use util::ResultExt;
-use workspace::Workspace;
+use workspace::{ItemHandle, Workspace};
 
 use super::RunningState;
 
 #[derive(Debug)]
 pub enum StackFrameListEvent {
     SelectedStackFrameChanged(StackFrameId),
+    BuiltEntries,
 }
 
 pub struct StackFrameList {
-    list: ListState,
     focus_handle: FocusHandle,
     _subscription: Subscription,
     session: Entity<Session>,
     state: WeakEntity<RunningState>,
     entries: Vec<StackFrameEntry>,
     workspace: WeakEntity<Workspace>,
-    selected_stack_frame_id: Option<StackFrameId>,
+    selected_ix: Option<usize>,
+    opened_stack_frame_id: Option<StackFrameId>,
     scrollbar_state: ScrollbarState,
+    scroll_handle: UniformListScrollHandle,
     _refresh_task: Task<()>,
 }
 
@@ -52,22 +54,8 @@ impl StackFrameList {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Self {
-        let weak_entity = cx.weak_entity();
         let focus_handle = cx.focus_handle();
-
-        let list = ListState::new(
-            0,
-            gpui::ListAlignment::Top,
-            px(1000.),
-            move |ix, _window, cx| {
-                weak_entity
-                    .upgrade()
-                    .map(|stack_frame_list| {
-                        stack_frame_list.update(cx, |this, cx| this.render_entry(ix, cx))
-                    })
-                    .unwrap_or(div().into_any())
-            },
-        );
+        let scroll_handle = UniformListScrollHandle::new();
 
         let _subscription =
             cx.subscribe_in(&session, window, |this, _, event, window, cx| match event {
@@ -81,15 +69,16 @@ impl StackFrameList {
             });
 
         let mut this = Self {
-            scrollbar_state: ScrollbarState::new(list.clone()),
-            list,
+            scrollbar_state: ScrollbarState::new(scroll_handle.clone()),
             session,
             workspace,
             focus_handle,
             state,
             _subscription,
             entries: Default::default(),
-            selected_stack_frame_id: None,
+            selected_ix: None,
+            opened_stack_frame_id: None,
+            scroll_handle,
             _refresh_task: Task::ready(()),
         };
         this.schedule_refresh(true, window, cx);
@@ -101,13 +90,18 @@ impl StackFrameList {
         &self.entries
     }
 
-    #[cfg(test)]
-    pub(crate) fn flatten_entries(&self) -> Vec<dap::StackFrame> {
+    pub(crate) fn flatten_entries(&self, show_collapsed: bool) -> Vec<dap::StackFrame> {
         self.entries
             .iter()
             .flat_map(|frame| match frame {
                 StackFrameEntry::Normal(frame) => vec![frame.clone()],
-                StackFrameEntry::Collapsed(frames) => frames.clone(),
+                StackFrameEntry::Collapsed(frames) => {
+                    if show_collapsed {
+                        frames.clone()
+                    } else {
+                        vec![]
+                    }
+                }
             })
             .collect::<Vec<_>>()
     }
@@ -115,7 +109,7 @@ impl StackFrameList {
     fn stack_frames(&self, cx: &mut App) -> Vec<StackFrame> {
         self.state
             .read_with(cx, |state, _| state.thread_id)
-            .log_err()
+            .ok()
             .flatten()
             .map(|thread_id| {
                 self.session
@@ -132,8 +126,8 @@ impl StackFrameList {
             .collect()
     }
 
-    pub fn selected_stack_frame_id(&self) -> Option<StackFrameId> {
-        self.selected_stack_frame_id
+    pub fn opened_stack_frame_id(&self) -> Option<StackFrameId> {
+        self.opened_stack_frame_id
     }
 
     pub(super) fn schedule_refresh(
@@ -166,13 +160,22 @@ impl StackFrameList {
 
     pub fn build_entries(
         &mut self,
-        select_first_stack_frame: bool,
+        open_first_stack_frame: bool,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) {
+        let old_selected_frame_id = self
+            .selected_ix
+            .and_then(|ix| self.entries.get(ix))
+            .and_then(|entry| match entry {
+                StackFrameEntry::Normal(stack_frame) => Some(stack_frame.id),
+                StackFrameEntry::Collapsed(stack_frames) => {
+                    stack_frames.first().map(|stack_frame| stack_frame.id)
+                }
+            });
         let mut entries = Vec::new();
         let mut collapsed_entries = Vec::new();
-        let mut current_stack_frame = None;
+        let mut first_stack_frame = None;
 
         let stack_frames = self.stack_frames(cx);
         for stack_frame in &stack_frames {
@@ -186,7 +189,7 @@ impl StackFrameList {
                         entries.push(StackFrameEntry::Collapsed(collapsed_entries.clone()));
                     }
 
-                    current_stack_frame.get_or_insert(&stack_frame.dap);
+                    first_stack_frame.get_or_insert(entries.len());
                     entries.push(StackFrameEntry::Normal(stack_frame.dap.clone()));
                 }
             }
@@ -198,68 +201,60 @@ impl StackFrameList {
         }
 
         std::mem::swap(&mut self.entries, &mut entries);
-        self.list.reset(self.entries.len());
 
-        if let Some(current_stack_frame) = current_stack_frame.filter(|_| select_first_stack_frame)
-        {
-            self.select_stack_frame(current_stack_frame, true, window, cx)
-                .detach_and_log_err(cx);
+        if let Some(ix) = first_stack_frame.filter(|_| open_first_stack_frame) {
+            self.select_ix(Some(ix), cx);
+            self.activate_selected_entry(window, cx);
+        } else if let Some(old_selected_frame_id) = old_selected_frame_id {
+            let ix = self.entries.iter().position(|entry| match entry {
+                StackFrameEntry::Normal(frame) => frame.id == old_selected_frame_id,
+                StackFrameEntry::Collapsed(frames) => {
+                    frames.iter().any(|frame| frame.id == old_selected_frame_id)
+                }
+            });
+            self.selected_ix = ix;
         }
 
+        cx.emit(StackFrameListEvent::BuiltEntries);
         cx.notify();
     }
 
-    pub fn go_to_selected_stack_frame(&mut self, window: &Window, cx: &mut Context<Self>) {
-        if let Some(selected_stack_frame_id) = self.selected_stack_frame_id {
-            let frame = self
-                .entries
-                .iter()
-                .find_map(|entry| match entry {
-                    StackFrameEntry::Normal(dap) => {
-                        if dap.id == selected_stack_frame_id {
-                            Some(dap)
-                        } else {
-                            None
-                        }
-                    }
-                    StackFrameEntry::Collapsed(daps) => {
-                        daps.iter().find(|dap| dap.id == selected_stack_frame_id)
-                    }
-                })
-                .cloned();
-
-            if let Some(frame) = frame.as_ref() {
-                self.select_stack_frame(frame, true, window, cx)
-                    .detach_and_log_err(cx);
-            }
-        }
-    }
-
-    pub fn select_stack_frame(
+    pub fn go_to_stack_frame(
         &mut self,
-        stack_frame: &dap::StackFrame,
-        go_to_stack_frame: bool,
-        window: &Window,
+        stack_frame_id: StackFrameId,
+        window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Task<Result<()>> {
-        self.selected_stack_frame_id = Some(stack_frame.id);
-
-        cx.emit(StackFrameListEvent::SelectedStackFrameChanged(
-            stack_frame.id,
-        ));
-        cx.notify();
-
-        if !go_to_stack_frame {
-            return Task::ready(Ok(()));
+        let Some(stack_frame) = self
+            .entries
+            .iter()
+            .flat_map(|entry| match entry {
+                StackFrameEntry::Normal(stack_frame) => std::slice::from_ref(stack_frame),
+                StackFrameEntry::Collapsed(stack_frames) => stack_frames.as_slice(),
+            })
+            .find(|stack_frame| stack_frame.id == stack_frame_id)
+            .cloned()
+        else {
+            return Task::ready(Err(anyhow!("No stack frame for ID")));
         };
+        self.go_to_stack_frame_inner(stack_frame, window, cx)
+    }
 
-        let row = (stack_frame.line.saturating_sub(1)) as u32;
-
-        let Some(abs_path) = self.abs_path_from_stack_frame(&stack_frame) else {
+    fn go_to_stack_frame_inner(
+        &mut self,
+        stack_frame: dap::StackFrame,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        let stack_frame_id = stack_frame.id;
+        self.opened_stack_frame_id = Some(stack_frame_id);
+        let Some(abs_path) = Self::abs_path_from_stack_frame(&stack_frame) else {
             return Task::ready(Err(anyhow!("Project path not found")));
         };
-
-        let stack_frame_id = stack_frame.id;
+        let row = stack_frame.line.saturating_sub(1) as u32;
+        cx.emit(StackFrameListEvent::SelectedStackFrameChanged(
+            stack_frame_id,
+        ));
         cx.spawn_in(window, async move |this, cx| {
             let (worktree, relative_path) = this
                 .update(cx, |this, cx| {
@@ -294,12 +289,22 @@ impl StackFrameList {
                     let project_path = buffer.read(cx).project_path(cx).ok_or_else(|| {
                         anyhow!("Could not select a stack frame for unnamed buffer")
                     })?;
+
+                    let open_preview = !workspace
+                        .item_of_type::<StackTraceView>(cx)
+                        .map(|viewer| {
+                            workspace
+                                .active_item(cx)
+                                .is_some_and(|item| item.item_id() == viewer.item_id())
+                        })
+                        .unwrap_or_default();
+
                     anyhow::Ok(workspace.open_path_preview(
                         project_path,
                         None,
-                        false,
                         true,
                         true,
+                        open_preview,
                         window,
                         cx,
                     ))
@@ -332,7 +337,7 @@ impl StackFrameList {
         })
     }
 
-    fn abs_path_from_stack_frame(&self, stack_frame: &dap::StackFrame) -> Option<Arc<Path>> {
+    pub(crate) fn abs_path_from_stack_frame(stack_frame: &dap::StackFrame) -> Option<Arc<Path>> {
         stack_frame.source.as_ref().and_then(|s| {
             s.path
                 .as_deref()
@@ -348,11 +353,12 @@ impl StackFrameList {
 
     fn render_normal_entry(
         &self,
+        ix: usize,
         stack_frame: &dap::StackFrame,
         cx: &mut Context<Self>,
     ) -> AnyElement {
         let source = stack_frame.source.clone();
-        let is_selected_frame = Some(stack_frame.id) == self.selected_stack_frame_id;
+        let is_selected_frame = Some(ix) == self.selected_ix;
 
         let path = source.clone().and_then(|s| s.path.or(s.name));
         let formatted_path = path.map(|path| format!("{}:{}", path, stack_frame.line,));
@@ -388,12 +394,12 @@ impl StackFrameList {
             .when(is_selected_frame, |this| {
                 this.bg(cx.theme().colors().element_hover)
             })
-            .on_click(cx.listener({
-                let stack_frame = stack_frame.clone();
-                move |this, _, window, cx| {
-                    this.select_stack_frame(&stack_frame, true, window, cx)
-                        .detach_and_log_err(cx);
-                }
+            .on_any_mouse_down(|_, _, cx| {
+                cx.stop_propagation();
+            })
+            .on_click(cx.listener(move |this, _, window, cx| {
+                this.selected_ix = Some(ix);
+                this.activate_selected_entry(window, cx);
             }))
             .hover(|style| style.bg(cx.theme().colors().element_hover).cursor_pointer())
             .child(
@@ -448,20 +454,15 @@ impl StackFrameList {
             .into_any()
     }
 
-    pub fn expand_collapsed_entry(
-        &mut self,
-        ix: usize,
-        stack_frames: &Vec<dap::StackFrame>,
-        cx: &mut Context<Self>,
-    ) {
-        self.entries.splice(
-            ix..ix + 1,
-            stack_frames
-                .iter()
-                .map(|frame| StackFrameEntry::Normal(frame.clone())),
-        );
-        self.list.reset(self.entries.len());
-        cx.notify();
+    pub(crate) fn expand_collapsed_entry(&mut self, ix: usize) {
+        let Some(StackFrameEntry::Collapsed(stack_frames)) = self.entries.get_mut(ix) else {
+            return;
+        };
+        let entries = std::mem::take(stack_frames)
+            .into_iter()
+            .map(StackFrameEntry::Normal);
+        self.entries.splice(ix..ix + 1, entries);
+        self.selected_ix = Some(ix);
     }
 
     fn render_collapsed_entry(
@@ -471,6 +472,7 @@ impl StackFrameList {
         cx: &mut Context<Self>,
     ) -> AnyElement {
         let first_stack_frame = &stack_frames[0];
+        let is_selected = Some(ix) == self.selected_ix;
 
         h_flex()
             .rounded_md()
@@ -479,11 +481,15 @@ impl StackFrameList {
             .group("")
             .id(("stack-frame", first_stack_frame.id))
             .p_1()
-            .on_click(cx.listener({
-                let stack_frames = stack_frames.clone();
-                move |this, _, _window, cx| {
-                    this.expand_collapsed_entry(ix, &stack_frames, cx);
-                }
+            .when(is_selected, |this| {
+                this.bg(cx.theme().colors().element_hover)
+            })
+            .on_any_mouse_down(|_, _, cx| {
+                cx.stop_propagation();
+            })
+            .on_click(cx.listener(move |this, _, window, cx| {
+                this.selected_ix = Some(ix);
+                this.activate_selected_entry(window, cx);
             }))
             .hover(|style| style.bg(cx.theme().colors().element_hover).cursor_pointer())
             .child(
@@ -506,7 +512,7 @@ impl StackFrameList {
 
     fn render_entry(&self, ix: usize, cx: &mut Context<Self>) -> AnyElement {
         match &self.entries[ix] {
-            StackFrameEntry::Normal(stack_frame) => self.render_normal_entry(stack_frame, cx),
+            StackFrameEntry::Normal(stack_frame) => self.render_normal_entry(ix, stack_frame, cx),
             StackFrameEntry::Collapsed(stack_frames) => {
                 self.render_collapsed_entry(ix, stack_frames, cx)
             }
@@ -545,15 +551,120 @@ impl StackFrameList {
             .cursor_default()
             .children(Scrollbar::vertical(self.scrollbar_state.clone()))
     }
+
+    fn select_ix(&mut self, ix: Option<usize>, cx: &mut Context<Self>) {
+        self.selected_ix = ix;
+        if let Some(ix) = self.selected_ix {
+            self.scroll_handle
+                .scroll_to_item(ix, ScrollStrategy::Center);
+        }
+        cx.notify();
+    }
+
+    fn select_next(&mut self, _: &menu::SelectNext, _window: &mut Window, cx: &mut Context<Self>) {
+        let ix = match self.selected_ix {
+            _ if self.entries.len() == 0 => None,
+            None => Some(0),
+            Some(ix) => {
+                if ix == self.entries.len() - 1 {
+                    Some(0)
+                } else {
+                    Some(ix + 1)
+                }
+            }
+        };
+        self.select_ix(ix, cx);
+    }
+
+    fn select_previous(
+        &mut self,
+        _: &menu::SelectPrevious,
+        _window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let ix = match self.selected_ix {
+            _ if self.entries.len() == 0 => None,
+            None => Some(self.entries.len() - 1),
+            Some(ix) => {
+                if ix == 0 {
+                    Some(self.entries.len() - 1)
+                } else {
+                    Some(ix - 1)
+                }
+            }
+        };
+        self.select_ix(ix, cx);
+    }
+
+    fn select_first(
+        &mut self,
+        _: &menu::SelectFirst,
+        _window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let ix = if self.entries.len() > 0 {
+            Some(0)
+        } else {
+            None
+        };
+        self.select_ix(ix, cx);
+    }
+
+    fn select_last(&mut self, _: &menu::SelectLast, _window: &mut Window, cx: &mut Context<Self>) {
+        let ix = if self.entries.len() > 0 {
+            Some(self.entries.len() - 1)
+        } else {
+            None
+        };
+        self.select_ix(ix, cx);
+    }
+
+    fn activate_selected_entry(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        let Some(ix) = self.selected_ix else {
+            return;
+        };
+        let Some(entry) = self.entries.get_mut(ix) else {
+            return;
+        };
+        match entry {
+            StackFrameEntry::Normal(stack_frame) => {
+                let stack_frame = stack_frame.clone();
+                self.go_to_stack_frame_inner(stack_frame, window, cx)
+                    .detach_and_log_err(cx)
+            }
+            StackFrameEntry::Collapsed(_) => self.expand_collapsed_entry(ix),
+        }
+        cx.notify();
+    }
+
+    fn confirm(&mut self, _: &menu::Confirm, window: &mut Window, cx: &mut Context<Self>) {
+        self.activate_selected_entry(window, cx);
+    }
+
+    fn render_list(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+        uniform_list(
+            cx.entity(),
+            "stack-frame-list",
+            self.entries.len(),
+            |this, range, _window, cx| range.map(|ix| this.render_entry(ix, cx)).collect(),
+        )
+        .track_scroll(self.scroll_handle.clone())
+        .size_full()
+    }
 }
 
 impl Render for StackFrameList {
-    fn render(&mut self, _window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
+    fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
         div()
             .track_focus(&self.focus_handle)
             .size_full()
             .p_1()
-            .child(list(self.list.clone()).size_full())
+            .on_action(cx.listener(Self::select_next))
+            .on_action(cx.listener(Self::select_previous))
+            .on_action(cx.listener(Self::select_first))
+            .on_action(cx.listener(Self::select_last))
+            .on_action(cx.listener(Self::confirm))
+            .child(self.render_list(window, cx))
             .child(self.render_vertical_scrollbar(cx))
     }
 }

crates/debugger_ui/src/session/running/variable_list.rs

@@ -302,6 +302,7 @@ impl VariableList {
                 self.selected_stack_frame_id = Some(*stack_frame_id);
                 cx.notify();
             }
+            StackFrameListEvent::BuiltEntries => {}
         }
     }
 

crates/debugger_ui/src/stack_trace_view.rs

@@ -0,0 +1,453 @@
+use std::any::{Any, TypeId};
+
+use collections::HashMap;
+use dap::StackFrameId;
+use editor::{
+    Anchor, Bias, DebugStackFrameLine, Editor, EditorEvent, ExcerptId, ExcerptRange, MultiBuffer,
+    RowHighlightOptions, ToPoint, scroll::Autoscroll,
+};
+use gpui::{
+    AnyView, App, AppContext, Entity, EventEmitter, Focusable, IntoElement, Render, SharedString,
+    Subscription, Task, WeakEntity, Window,
+};
+use language::{BufferSnapshot, Capability, Point, Selection, SelectionGoal, TreeSitterOptions};
+use project::{Project, ProjectPath};
+use ui::{ActiveTheme as _, Context, ParentElement as _, Styled as _, div};
+use util::ResultExt as _;
+use workspace::{
+    Item, ItemHandle as _, ItemNavHistory, ToolbarItemLocation, Workspace,
+    item::{BreadcrumbText, ItemEvent},
+    searchable::SearchableItemHandle,
+};
+
+use crate::session::running::stack_frame_list::{StackFrameList, StackFrameListEvent};
+use anyhow::Result;
+
+pub(crate) struct StackTraceView {
+    editor: Entity<Editor>,
+    multibuffer: Entity<MultiBuffer>,
+    workspace: WeakEntity<Workspace>,
+    project: Entity<Project>,
+    stack_frame_list: Entity<StackFrameList>,
+    selected_stack_frame_id: Option<StackFrameId>,
+    highlights: Vec<(StackFrameId, Anchor)>,
+    excerpt_for_frames: collections::HashMap<ExcerptId, StackFrameId>,
+    refresh_task: Option<Task<Result<()>>>,
+    _subscription: Option<Subscription>,
+}
+
+impl StackTraceView {
+    pub(crate) fn new(
+        workspace: WeakEntity<Workspace>,
+        project: Entity<Project>,
+        stack_frame_list: Entity<StackFrameList>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Self {
+        let multibuffer = cx.new(|_| MultiBuffer::new(Capability::ReadWrite));
+        let editor = cx.new(|cx| {
+            let mut editor =
+                Editor::for_multibuffer(multibuffer.clone(), Some(project.clone()), window, cx);
+            editor.set_vertical_scroll_margin(5, cx);
+            editor
+        });
+
+        cx.subscribe_in(&editor, window, |this, editor, event, window, cx| {
+            if let EditorEvent::SelectionsChanged { local: true } = event {
+                let excerpt_id = editor.update(cx, |editor, cx| {
+                    let position: Point = editor.selections.newest(cx).head();
+
+                    editor
+                        .snapshot(window, cx)
+                        .buffer_snapshot
+                        .excerpt_containing(position..position)
+                        .map(|excerpt| excerpt.id())
+                });
+
+                if let Some(stack_frame_id) = excerpt_id
+                    .and_then(|id| this.excerpt_for_frames.get(&id))
+                    .filter(|id| Some(**id) != this.selected_stack_frame_id)
+                {
+                    this.stack_frame_list.update(cx, |list, cx| {
+                        list.go_to_stack_frame(*stack_frame_id, window, cx).detach();
+                    });
+                }
+            }
+        })
+        .detach();
+
+        cx.subscribe_in(
+            &stack_frame_list,
+            window,
+            |this, stack_frame_list, event, window, cx| match event {
+                StackFrameListEvent::BuiltEntries => {
+                    this.selected_stack_frame_id =
+                        stack_frame_list.read(cx).opened_stack_frame_id();
+                    this.update_excerpts(window, cx);
+                }
+                StackFrameListEvent::SelectedStackFrameChanged(selected_frame_id) => {
+                    this.selected_stack_frame_id = Some(*selected_frame_id);
+                    this.update_highlights(window, cx);
+
+                    if let Some(frame_anchor) = this
+                        .highlights
+                        .iter()
+                        .find(|(frame_id, _)| frame_id == selected_frame_id)
+                        .map(|highlight| highlight.1)
+                    {
+                        this.editor.update(cx, |editor, cx| {
+                            if frame_anchor.excerpt_id
+                                != editor.selections.newest_anchor().head().excerpt_id
+                            {
+                                let auto_scroll =
+                                    Some(Autoscroll::center().for_anchor(frame_anchor));
+
+                                editor.change_selections(auto_scroll, window, cx, |selections| {
+                                    let selection_id = selections.new_selection_id();
+
+                                    let selection = Selection {
+                                        id: selection_id,
+                                        start: frame_anchor,
+                                        end: frame_anchor,
+                                        goal: SelectionGoal::None,
+                                        reversed: false,
+                                    };
+
+                                    selections.select_anchors(vec![selection]);
+                                })
+                            }
+                        });
+                    }
+                }
+            },
+        )
+        .detach();
+
+        let mut this = Self {
+            editor,
+            multibuffer,
+            workspace,
+            project,
+            excerpt_for_frames: HashMap::default(),
+            highlights: Vec::default(),
+            stack_frame_list,
+            selected_stack_frame_id: None,
+            refresh_task: None,
+            _subscription: None,
+        };
+
+        this.update_excerpts(window, cx);
+        this
+    }
+
+    fn update_excerpts(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        self.refresh_task.take();
+        self.editor.update(cx, |editor, cx| {
+            editor.clear_highlights::<DebugStackFrameLine>(cx)
+        });
+
+        let stack_frames = self
+            .stack_frame_list
+            .update(cx, |list, _| list.flatten_entries(false));
+
+        let frames_to_open: Vec<_> = stack_frames
+            .into_iter()
+            .filter_map(|frame| {
+                Some((
+                    frame.id,
+                    frame.line as u32 - 1,
+                    StackFrameList::abs_path_from_stack_frame(&frame)?,
+                ))
+            })
+            .collect();
+
+        self.multibuffer
+            .update(cx, |multi_buffer, cx| multi_buffer.clear(cx));
+
+        let task = cx.spawn_in(window, async move |this, cx| {
+            let mut to_highlights = Vec::default();
+
+            for (stack_frame_id, line, abs_path) in frames_to_open {
+                let (worktree, relative_path) = this
+                    .update(cx, |this, cx| {
+                        this.workspace.update(cx, |workspace, cx| {
+                            workspace.project().update(cx, |this, cx| {
+                                this.find_or_create_worktree(&abs_path, false, cx)
+                            })
+                        })
+                    })??
+                    .await?;
+
+                let project_path = ProjectPath {
+                    worktree_id: worktree.read_with(cx, |tree, _| tree.id())?,
+                    path: relative_path.into(),
+                };
+
+                if let Some(buffer) = this
+                    .read_with(cx, |this, _| this.project.clone())?
+                    .update(cx, |project, cx| project.open_buffer(project_path, cx))?
+                    .await
+                    .log_err()
+                {
+                    this.update(cx, |this, cx| {
+                        this.multibuffer.update(cx, |multi_buffer, cx| {
+                            let line_point = Point::new(line, 0);
+                            let start_context = Self::heuristic_syntactic_expand(
+                                &buffer.read(cx).snapshot(),
+                                line_point,
+                            );
+
+                            // Users will want to see what happened before an active debug line in most cases
+                            let range = ExcerptRange {
+                                context: start_context..Point::new(line.saturating_add(1), 0),
+                                primary: line_point..line_point,
+                            };
+                            multi_buffer.push_excerpts(buffer.clone(), vec![range], cx);
+
+                            let line_anchor =
+                                multi_buffer.buffer_point_to_anchor(&buffer, line_point, cx);
+
+                            if let Some(line_anchor) = line_anchor {
+                                this.excerpt_for_frames
+                                    .insert(line_anchor.excerpt_id, stack_frame_id);
+                                to_highlights.push((stack_frame_id, line_anchor));
+                            }
+                        });
+                    })
+                    .ok();
+                }
+            }
+
+            this.update_in(cx, |this, window, cx| {
+                this.highlights = to_highlights;
+                this.update_highlights(window, cx);
+            })
+            .ok();
+
+            anyhow::Ok(())
+        });
+
+        self.refresh_task = Some(task);
+    }
+
+    fn update_highlights(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        self.editor.update(cx, |editor, _| {
+            editor.clear_row_highlights::<DebugStackFrameLine>()
+        });
+
+        let stack_frames = self
+            .stack_frame_list
+            .update(cx, |session, _| session.flatten_entries(false));
+
+        let active_idx = self
+            .selected_stack_frame_id
+            .and_then(|id| {
+                stack_frames
+                    .iter()
+                    .enumerate()
+                    .find_map(|(idx, frame)| if frame.id == id { Some(idx) } else { None })
+            })
+            .unwrap_or(0);
+
+        self.editor.update(cx, |editor, cx| {
+            let snapshot = editor.snapshot(window, cx).display_snapshot;
+            let first_color = cx.theme().colors().editor_debugger_active_line_background;
+
+            let color = first_color.opacity(0.5);
+
+            let mut is_first = true;
+
+            for (_, highlight) in self.highlights.iter().skip(active_idx) {
+                let position = highlight.to_point(&snapshot.buffer_snapshot);
+                let color = if is_first {
+                    is_first = false;
+                    first_color
+                } else {
+                    color
+                };
+
+                let start = snapshot
+                    .buffer_snapshot
+                    .clip_point(Point::new(position.row, 0), Bias::Left);
+                let end = start + Point::new(1, 0);
+                let start = snapshot.buffer_snapshot.anchor_before(start);
+                let end = snapshot.buffer_snapshot.anchor_before(end);
+                editor.highlight_rows::<DebugStackFrameLine>(
+                    start..end,
+                    color,
+                    RowHighlightOptions::default(),
+                    cx,
+                );
+            }
+        })
+    }
+
+    fn heuristic_syntactic_expand(snapshot: &BufferSnapshot, selected_point: Point) -> Point {
+        let mut text_objects = snapshot.text_object_ranges(
+            selected_point..selected_point,
+            TreeSitterOptions::max_start_depth(4),
+        );
+
+        let mut start_position = text_objects
+            .find(|(_, obj)| matches!(obj, language::TextObject::AroundFunction))
+            .map(|(range, _)| snapshot.offset_to_point(range.start))
+            .map(|point| Point::new(point.row.max(selected_point.row.saturating_sub(8)), 0))
+            .unwrap_or(selected_point);
+
+        if start_position.row == selected_point.row {
+            start_position.row = start_position.row.saturating_sub(1);
+        }
+
+        start_position
+    }
+}
+
+impl Render for StackTraceView {
+    fn render(&mut self, _: &mut Window, _: &mut Context<Self>) -> impl IntoElement {
+        div().size_full().child(self.editor.clone())
+    }
+}
+
+impl EventEmitter<EditorEvent> for StackTraceView {}
+impl Focusable for StackTraceView {
+    fn focus_handle(&self, cx: &App) -> gpui::FocusHandle {
+        self.editor.focus_handle(cx)
+    }
+}
+
+impl Item for StackTraceView {
+    type Event = EditorEvent;
+
+    fn to_item_events(event: &EditorEvent, f: impl FnMut(ItemEvent)) {
+        Editor::to_item_events(event, f)
+    }
+
+    fn deactivated(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        self.editor
+            .update(cx, |editor, cx| editor.deactivated(window, cx));
+    }
+
+    fn navigate(
+        &mut self,
+        data: Box<dyn Any>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> bool {
+        self.editor
+            .update(cx, |editor, cx| editor.navigate(data, window, cx))
+    }
+
+    fn tab_tooltip_text(&self, _: &App) -> Option<SharedString> {
+        Some("Stack Frame Viewer".into())
+    }
+
+    fn tab_content_text(&self, _detail: usize, _: &App) -> SharedString {
+        "Stack Frames".into()
+    }
+
+    fn for_each_project_item(
+        &self,
+        cx: &App,
+        f: &mut dyn FnMut(gpui::EntityId, &dyn project::ProjectItem),
+    ) {
+        self.editor.for_each_project_item(cx, f)
+    }
+
+    fn is_singleton(&self, _: &App) -> bool {
+        false
+    }
+
+    fn set_nav_history(
+        &mut self,
+        nav_history: ItemNavHistory,
+        _: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        self.editor.update(cx, |editor, _| {
+            editor.set_nav_history(Some(nav_history));
+        });
+    }
+
+    fn is_dirty(&self, cx: &App) -> bool {
+        self.multibuffer.read(cx).is_dirty(cx)
+    }
+
+    fn has_deleted_file(&self, cx: &App) -> bool {
+        self.multibuffer.read(cx).has_deleted_file(cx)
+    }
+
+    fn has_conflict(&self, cx: &App) -> bool {
+        self.multibuffer.read(cx).has_conflict(cx)
+    }
+
+    fn can_save(&self, _: &App) -> bool {
+        true
+    }
+
+    fn save(
+        &mut self,
+        format: bool,
+        project: Entity<Project>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        self.editor.save(format, project, window, cx)
+    }
+
+    fn save_as(
+        &mut self,
+        _: Entity<Project>,
+        _: ProjectPath,
+        _window: &mut Window,
+        _: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        unreachable!()
+    }
+
+    fn reload(
+        &mut self,
+        project: Entity<Project>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        self.editor.reload(project, window, cx)
+    }
+
+    fn act_as_type<'a>(
+        &'a self,
+        type_id: TypeId,
+        self_handle: &'a Entity<Self>,
+        _: &'a App,
+    ) -> Option<AnyView> {
+        if type_id == TypeId::of::<Self>() {
+            Some(self_handle.to_any())
+        } else if type_id == TypeId::of::<Editor>() {
+            Some(self.editor.to_any())
+        } else {
+            None
+        }
+    }
+
+    fn as_searchable(&self, _: &Entity<Self>) -> Option<Box<dyn SearchableItemHandle>> {
+        Some(Box::new(self.editor.clone()))
+    }
+
+    fn breadcrumb_location(&self, _: &App) -> ToolbarItemLocation {
+        ToolbarItemLocation::PrimaryLeft
+    }
+
+    fn breadcrumbs(&self, theme: &theme::Theme, cx: &App) -> Option<Vec<BreadcrumbText>> {
+        self.editor.breadcrumbs(theme, cx)
+    }
+
+    fn added_to_workspace(
+        &mut self,
+        workspace: &mut Workspace,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        self.editor.update(cx, |editor, cx| {
+            editor.added_to_workspace(workspace, window, cx)
+        });
+    }
+}

crates/debugger_ui/src/tests/inline_values.rs

@@ -1,7 +1,7 @@
 use std::{path::Path, sync::Arc};
 
 use dap::{Scope, StackFrame, Variable, requests::Variables};
-use editor::{Editor, EditorMode, MultiBuffer, actions::ToggleInlineValues};
+use editor::{Editor, EditorMode, MultiBuffer};
 use gpui::{BackgroundExecutor, TestAppContext, VisualTestContext};
 use language::{Language, LanguageConfig, LanguageMatcher, tree_sitter_python, tree_sitter_rust};
 use project::{FakeFs, Project};
@@ -239,11 +239,7 @@ fn main() {
     });
     cx.run_until_parked();
 
-    editor.update_in(cx, |editor, window, cx| {
-        if !editor.inline_values_enabled() {
-            editor.toggle_inline_values(&ToggleInlineValues, window, cx);
-        }
-    });
+    editor.update(cx, |editor, cx| editor.refresh_inline_values(cx));
 
     cx.run_until_parked();
 
@@ -1604,11 +1600,7 @@ def process_data(untyped_param, typed_param: int, another_typed: str):
         )
     });
 
-    editor.update_in(cx, |editor, window, cx| {
-        if !editor.inline_values_enabled() {
-            editor.toggle_inline_values(&ToggleInlineValues, window, cx);
-        }
-    });
+    editor.update(cx, |editor, cx| editor.refresh_inline_values(cx));
 
     client.on_request::<dap::requests::Threads, _>(move |_, _| {
         Ok(dap::ThreadsResponse {

crates/debugger_ui/src/tests/stack_frame_list.rs

@@ -168,7 +168,7 @@ async fn test_fetch_initial_stack_frames_and_go_to_stack_frame(
             .update(cx, |state, _| state.stack_frame_list().clone());
 
         stack_frame_list.update(cx, |stack_frame_list, cx| {
-            assert_eq!(Some(1), stack_frame_list.selected_stack_frame_id());
+            assert_eq!(Some(1), stack_frame_list.opened_stack_frame_id());
             assert_eq!(stack_frames, stack_frame_list.dap_stack_frames(cx));
         });
     });
@@ -373,14 +373,14 @@ async fn test_select_stack_frame(executor: BackgroundExecutor, cx: &mut TestAppC
         .unwrap();
 
     stack_frame_list.update(cx, |stack_frame_list, cx| {
-        assert_eq!(Some(1), stack_frame_list.selected_stack_frame_id());
+        assert_eq!(Some(1), stack_frame_list.opened_stack_frame_id());
         assert_eq!(stack_frames, stack_frame_list.dap_stack_frames(cx));
     });
 
     // select second stack frame
     stack_frame_list
         .update_in(cx, |stack_frame_list, window, cx| {
-            stack_frame_list.select_stack_frame(&stack_frames[1], true, window, cx)
+            stack_frame_list.go_to_stack_frame(stack_frames[1].id, window, cx)
         })
         .await
         .unwrap();
@@ -388,7 +388,7 @@ async fn test_select_stack_frame(executor: BackgroundExecutor, cx: &mut TestAppC
     cx.run_until_parked();
 
     stack_frame_list.update(cx, |stack_frame_list, cx| {
-        assert_eq!(Some(2), stack_frame_list.selected_stack_frame_id());
+        assert_eq!(Some(2), stack_frame_list.opened_stack_frame_id());
         assert_eq!(stack_frames, stack_frame_list.dap_stack_frames(cx));
     });
 
@@ -718,11 +718,7 @@ async fn test_collapsed_entries(executor: BackgroundExecutor, cx: &mut TestAppCo
                 stack_frame_list.entries()
             );
 
-            stack_frame_list.expand_collapsed_entry(
-                1,
-                &vec![stack_frames[1].clone(), stack_frames[2].clone()],
-                cx,
-            );
+            stack_frame_list.expand_collapsed_entry(1);
 
             assert_eq!(
                 &vec![
@@ -739,11 +735,7 @@ async fn test_collapsed_entries(executor: BackgroundExecutor, cx: &mut TestAppCo
                 stack_frame_list.entries()
             );
 
-            stack_frame_list.expand_collapsed_entry(
-                4,
-                &vec![stack_frames[4].clone(), stack_frames[5].clone()],
-                cx,
-            );
+            stack_frame_list.expand_collapsed_entry(4);
 
             assert_eq!(
                 &vec![

crates/debugger_ui/src/tests/variable_list.rs

@@ -190,7 +190,7 @@ async fn test_basic_fetch_initial_scope_and_variables(
     running_state.update(cx, |running_state, cx| {
         let (stack_frame_list, stack_frame_id) =
             running_state.stack_frame_list().update(cx, |list, _| {
-                (list.flatten_entries(), list.selected_stack_frame_id())
+                (list.flatten_entries(true), list.opened_stack_frame_id())
             });
 
         assert_eq!(stack_frames, stack_frame_list);
@@ -431,7 +431,7 @@ async fn test_fetch_variables_for_multiple_scopes(
     running_state.update(cx, |running_state, cx| {
         let (stack_frame_list, stack_frame_id) =
             running_state.stack_frame_list().update(cx, |list, _| {
-                (list.flatten_entries(), list.selected_stack_frame_id())
+                (list.flatten_entries(true), list.opened_stack_frame_id())
             });
 
         assert_eq!(Some(1), stack_frame_id);
@@ -1452,7 +1452,7 @@ async fn test_variable_list_only_sends_requests_when_rendering(
     running_state.update(cx, |running_state, cx| {
         let (stack_frame_list, stack_frame_id) =
             running_state.stack_frame_list().update(cx, |list, _| {
-                (list.flatten_entries(), list.selected_stack_frame_id())
+                (list.flatten_entries(true), list.opened_stack_frame_id())
             });
 
         assert_eq!(Some(1), stack_frame_id);
@@ -1734,7 +1734,7 @@ async fn test_it_fetches_scopes_variables_when_you_select_a_stack_frame(
     running_state.update(cx, |running_state, cx| {
         let (stack_frame_list, stack_frame_id) =
             running_state.stack_frame_list().update(cx, |list, _| {
-                (list.flatten_entries(), list.selected_stack_frame_id())
+                (list.flatten_entries(true), list.opened_stack_frame_id())
             });
 
         let variable_list = running_state.variable_list().read(cx);
@@ -1745,7 +1745,7 @@ async fn test_it_fetches_scopes_variables_when_you_select_a_stack_frame(
             running_state
                 .stack_frame_list()
                 .read(cx)
-                .selected_stack_frame_id(),
+                .opened_stack_frame_id(),
             Some(1)
         );
 
@@ -1778,7 +1778,7 @@ async fn test_it_fetches_scopes_variables_when_you_select_a_stack_frame(
             running_state
                 .stack_frame_list()
                 .update(cx, |stack_frame_list, cx| {
-                    stack_frame_list.select_stack_frame(&stack_frames[1], true, window, cx)
+                    stack_frame_list.go_to_stack_frame(stack_frames[1].id, window, cx)
                 })
         })
         .await
@@ -1789,7 +1789,7 @@ async fn test_it_fetches_scopes_variables_when_you_select_a_stack_frame(
     running_state.update(cx, |running_state, cx| {
         let (stack_frame_list, stack_frame_id) =
             running_state.stack_frame_list().update(cx, |list, _| {
-                (list.flatten_entries(), list.selected_stack_frame_id())
+                (list.flatten_entries(true), list.opened_stack_frame_id())
             });
 
         let variable_list = running_state.variable_list().read(cx);

crates/editor/src/code_context_menus.rs

@@ -1103,6 +1103,7 @@ impl CodeActionsMenu {
                                     this.child(
                                         h_flex()
                                             .overflow_hidden()
+                                            .child("debug: ")
                                             .child(scenario.label.clone())
                                             .when(selected, |this| {
                                                 this.text_color(colors.text_accent)
@@ -1138,7 +1139,9 @@ impl CodeActionsMenu {
                     CodeActionsItem::CodeAction { action, .. } => {
                         action.lsp_action.title().chars().count()
                     }
-                    CodeActionsItem::DebugScenario(scenario) => scenario.label.chars().count(),
+                    CodeActionsItem::DebugScenario(scenario) => {
+                        format!("debug: {}", scenario.label).chars().count()
+                    }
                 })
                 .map(|(ix, _)| ix),
         )

crates/editor/src/editor.rs

@@ -289,6 +289,7 @@ impl InlayId {
 }
 
 pub enum ActiveDebugLine {}
+pub enum DebugStackFrameLine {}
 enum DocumentHighlightRead {}
 enum DocumentHighlightWrite {}
 enum InputComposition {}
@@ -5331,9 +5332,9 @@ impl Editor {
                                                     .map(SharedString::from)
                                             })?;
 
-                                    dap_store.update(cx, |this, cx| {
+                                    dap_store.update(cx, |dap_store, cx| {
                                         for (_, task) in &resolved_tasks.templates {
-                                            if let Some(scenario) = this
+                                            if let Some(scenario) = dap_store
                                                 .debug_scenario_for_build_task(
                                                     task.original_task().clone(),
                                                     debug_adapter.clone().into(),
@@ -13880,7 +13881,10 @@ impl Editor {
             Default::default(),
             cx,
         );
-        self.request_autoscroll(Autoscroll::center().for_anchor(start), cx);
+
+        if self.buffer.read(cx).is_singleton() {
+            self.request_autoscroll(Autoscroll::center().for_anchor(start), cx);
+        }
     }
 
     pub fn go_to_definition(
@@ -16886,6 +16890,7 @@ impl Editor {
 
                 handled = true;
                 self.clear_row_highlights::<ActiveDebugLine>();
+
                 self.go_to_line::<ActiveDebugLine>(
                     multibuffer_anchor,
                     Some(cx.theme().colors().editor_debugger_active_line_background),
@@ -17900,9 +17905,7 @@ impl Editor {
         let Some(project) = self.project.clone() else {
             return;
         };
-        let Some(buffer) = self.buffer.read(cx).as_singleton() else {
-            return;
-        };
+
         if !self.inline_value_cache.enabled {
             let inlays = std::mem::take(&mut self.inline_value_cache.inlays);
             self.splice_inlays(&inlays, Vec::new(), cx);
@@ -17915,20 +17918,25 @@ impl Editor {
             .and_then(|lines| lines.last().map(|line| line.range.start));
 
         self.inline_value_cache.refresh_task = cx.spawn(async move |editor, cx| {
-            let snapshot = editor
-                .update(cx, |editor, cx| editor.buffer().read(cx).snapshot(cx))
-                .ok()?;
-
             let inline_values = editor
-                .update(cx, |_, cx| {
+                .update(cx, |editor, cx| {
                     let Some(current_execution_position) = current_execution_position else {
                         return Some(Task::ready(Ok(Vec::new())));
                     };
 
-                    // todo(debugger) when introducing multi buffer inline values check execution position's buffer id to make sure the text
-                    // anchor is in the same buffer
+                    let buffer = editor.buffer.read_with(cx, |buffer, cx| {
+                        let snapshot = buffer.snapshot(cx);
+
+                        let excerpt = snapshot.excerpt_containing(
+                            current_execution_position..current_execution_position,
+                        )?;
+
+                        editor.buffer.read(cx).buffer(excerpt.buffer_id())
+                    })?;
+
                     let range =
                         buffer.read(cx).anchor_before(0)..current_execution_position.text_anchor;
+
                     project.inline_values(buffer, range, cx)
                 })
                 .ok()
@@ -17937,22 +17945,40 @@ impl Editor {
                 .context("refreshing debugger inlays")
                 .log_err()?;
 
-            let (excerpt_id, buffer_id) = snapshot
-                .excerpts()
-                .next()
-                .map(|excerpt| (excerpt.0, excerpt.1.remote_id()))?;
+            let mut buffer_inline_values: HashMap<BufferId, Vec<InlayHint>> = HashMap::default();
+
+            for (buffer_id, inline_value) in inline_values
+                .into_iter()
+                .filter_map(|hint| Some((hint.position.buffer_id?, hint)))
+            {
+                buffer_inline_values
+                    .entry(buffer_id)
+                    .or_default()
+                    .push(inline_value);
+            }
+
             editor
                 .update(cx, |editor, cx| {
-                    let new_inlays = inline_values
-                        .into_iter()
-                        .map(|debugger_value| {
-                            Inlay::debugger_hint(
-                                post_inc(&mut editor.next_inlay_id),
-                                Anchor::in_buffer(excerpt_id, buffer_id, debugger_value.position),
-                                debugger_value.text(),
-                            )
-                        })
-                        .collect::<Vec<_>>();
+                    let snapshot = editor.buffer.read(cx).snapshot(cx);
+                    let mut new_inlays = Vec::default();
+
+                    for (excerpt_id, buffer_snapshot, _) in snapshot.excerpts() {
+                        let buffer_id = buffer_snapshot.remote_id();
+                        buffer_inline_values
+                            .get(&buffer_id)
+                            .into_iter()
+                            .flatten()
+                            .for_each(|hint| {
+                                let inlay = Inlay::debugger_hint(
+                                    post_inc(&mut editor.next_inlay_id),
+                                    Anchor::in_buffer(excerpt_id, buffer_id, hint.position),
+                                    hint.text(),
+                                );
+
+                                new_inlays.push(inlay);
+                            });
+                    }
+
                     let mut inlay_ids = new_inlays.iter().map(|inlay| inlay.id).collect();
                     std::mem::swap(&mut editor.inline_value_cache.inlays, &mut inlay_ids);
 

crates/editor/src/editor_settings.rs

@@ -369,9 +369,9 @@ pub struct EditorSettingsContent {
     ///
     /// Default: true
     pub hover_popover_enabled: Option<bool>,
-    /// Time to wait before showing the informational hover box
+    /// Time to wait in milliseconds before showing the informational hover box.
     ///
-    /// Default: 350
+    /// Default: 300
     pub hover_popover_delay: Option<u64>,
     /// Toolbar related settings
     pub toolbar: Option<ToolbarContent>,

crates/editor/src/element.rs

@@ -4451,7 +4451,7 @@ impl EditorElement {
         let target_y = selection_row.as_f32() * line_height - scroll_pixel_position.y;
         let target_point = content_origin + point(target_x, target_y);
 
-        let actual_size = element.layout_as_root(max_size.into(), window, cx);
+        let actual_size = element.layout_as_root(Size::<AvailableSpace>::default(), window, cx);
         let overall_height = actual_size.height + HOVER_POPOVER_GAP;
 
         let popover_origin = if target_point.y > overall_height {

crates/eval/src/eval.rs

@@ -711,9 +711,9 @@ fn print_report(
         .values()
         .flat_map(|results| {
             results.iter().map(|(example, _)| {
-                let absolute_path = example.run_directory.join("last.messages.json");
-                pathdiff::diff_paths(&absolute_path, run_dir)
-                    .unwrap_or_else(|| absolute_path.clone())
+                let absolute_path = run_dir.join(example.run_directory.join("last.messages.json"));
+                let cwd = std::env::current_dir().expect("Can't get current dir");
+                pathdiff::diff_paths(&absolute_path, cwd).unwrap_or_else(|| absolute_path.clone())
             })
         })
         .collect::<Vec<_>>();

crates/eval/src/example.rs

@@ -48,6 +48,7 @@ pub struct ExampleMetadata {
     pub language_server: Option<LanguageServer>,
     pub max_assertions: Option<usize>,
     pub profile_id: AgentProfileId,
+    pub existing_thread_json: Option<String>,
 }
 
 #[derive(Clone, Debug)]
@@ -477,12 +478,16 @@ impl Response {
         tool_name: &'static str,
         cx: &mut ExampleContext,
     ) -> Result<&ToolUse> {
-        let result = self.messages.iter().find_map(|msg| {
+        let result = self.find_tool_call(tool_name);
+        cx.assert_some(result, format!("called `{}`", tool_name))
+    }
+
+    pub fn find_tool_call(&self, tool_name: &str) -> Option<&ToolUse> {
+        self.messages.iter().rev().find_map(|msg| {
             msg.tool_use
                 .iter()
                 .find(|tool_use| tool_use.name == tool_name)
-        });
-        cx.assert_some(result, format!("called `{}`", tool_name))
+        })
     }
 
     #[allow(dead_code)]

crates/eval/src/examples/add_arg_to_trait_method.rs

@@ -21,6 +21,7 @@ impl Example for AddArgToTraitMethod {
             }),
             max_assertions: None,
             profile_id: AgentProfileId::default(),
+            existing_thread_json: None,
         }
     }
 

crates/eval/src/examples/code_block_citations.rs

@@ -22,6 +22,7 @@ impl Example for CodeBlockCitations {
             }),
             max_assertions: None,
             profile_id: AgentProfileId::default(),
+            existing_thread_json: None,
         }
     }
 

crates/eval/src/examples/comment_translation.rs

@@ -1,7 +1,7 @@
 use crate::example::{Example, ExampleContext, ExampleMetadata, JudgeAssertion};
 use anyhow::Result;
 use assistant_settings::AgentProfileId;
-use assistant_tools::EditFileToolInput;
+use assistant_tools::{EditFileMode, EditFileToolInput};
 use async_trait::async_trait;
 
 pub struct CommentTranslation;
@@ -16,6 +16,7 @@ impl Example for CommentTranslation {
             language_server: None,
             max_assertions: Some(1),
             profile_id: AgentProfileId::default(),
+            existing_thread_json: None,
         }
     }
 
@@ -35,7 +36,7 @@ impl Example for CommentTranslation {
                 for tool_use in thread.tool_uses_for_message(message.id, cx) {
                     if tool_use.name == "edit_file" {
                         let input: EditFileToolInput = serde_json::from_value(tool_use.input)?;
-                        if input.create_or_overwrite {
+                        if !matches!(input.mode, EditFileMode::Edit) {
                             create_or_overwrite_count += 1;
                         }
                     }

crates/eval/src/examples/file_search.rs

@@ -18,6 +18,7 @@ impl Example for FileSearchExample {
             language_server: None,
             max_assertions: Some(3),
             profile_id: AgentProfileId::default(),
+            existing_thread_json: None,
         }
     }
 

crates/eval/src/examples/mod.rs

@@ -16,6 +16,7 @@ mod add_arg_to_trait_method;
 mod code_block_citations;
 mod comment_translation;
 mod file_search;
+mod overwrite_file;
 mod planets;
 
 pub fn all(examples_dir: &Path) -> Vec<Rc<dyn Example>> {
@@ -25,6 +26,7 @@ pub fn all(examples_dir: &Path) -> Vec<Rc<dyn Example>> {
         Rc::new(code_block_citations::CodeBlockCitations),
         Rc::new(planets::Planets),
         Rc::new(comment_translation::CommentTranslation),
+        Rc::new(overwrite_file::FileOverwriteExample),
     ];
 
     for example_path in list_declarative_examples(examples_dir).unwrap() {
@@ -45,6 +47,7 @@ impl DeclarativeExample {
     pub fn load(example_path: &Path) -> Result<Self> {
         let name = Self::name_from_path(example_path);
         let base: ExampleToml = toml::from_str(&fs::read_to_string(&example_path)?)?;
+        let example_dir = example_path.parent().unwrap();
 
         let language_server = if base.require_lsp {
             Some(crate::example::LanguageServer {
@@ -63,6 +66,14 @@ impl DeclarativeExample {
             AgentProfileId::default()
         };
 
+        let existing_thread_json = if let Some(path) = base.existing_thread_path {
+            let content = fs::read_to_string(example_dir.join(&path))
+                .unwrap_or_else(|_| panic!("Failed to read existing thread file: {}", path));
+            Some(content)
+        } else {
+            None
+        };
+
         let metadata = ExampleMetadata {
             name,
             url: base.url,
@@ -70,6 +81,7 @@ impl DeclarativeExample {
             language_server,
             max_assertions: None,
             profile_id,
+            existing_thread_json,
         };
 
         Ok(DeclarativeExample {
@@ -110,6 +122,8 @@ pub struct ExampleToml {
     pub diff_assertions: BTreeMap<String, String>,
     #[serde(default)]
     pub thread_assertions: BTreeMap<String, String>,
+    #[serde(default)]
+    pub existing_thread_path: Option<String>,
 }
 
 #[async_trait(?Send)]

crates/eval/src/examples/overwrite_file.rs

@@ -0,0 +1,49 @@
+use anyhow::Result;
+use assistant_settings::AgentProfileId;
+use assistant_tools::{EditFileMode, EditFileToolInput};
+use async_trait::async_trait;
+
+use crate::example::{Example, ExampleContext, ExampleMetadata};
+
+pub struct FileOverwriteExample;
+
+/*
+This eval tests a fix for a destructive behavior of the `edit_file` tool.
+Previously, it would rewrite existing files too aggressively, which often
+resulted in content loss.
+
+Pass rate before the fix: 10%
+Pass rate after the fix:  100%
+*/
+
+#[async_trait(?Send)]
+impl Example for FileOverwriteExample {
+    fn meta(&self) -> ExampleMetadata {
+        let thread_json = include_str!("threads/overwrite-file.json");
+
+        ExampleMetadata {
+            name: "file_overwrite".to_string(),
+            url: "https://github.com/zed-industries/zed.git".to_string(),
+            revision: "023a60806a8cc82e73bd8d88e63b4b07fc7a0040".to_string(),
+            language_server: None,
+            max_assertions: Some(1),
+            profile_id: AgentProfileId::default(),
+            existing_thread_json: Some(thread_json.to_string()),
+        }
+    }
+
+    async fn conversation(&self, cx: &mut ExampleContext) -> Result<()> {
+        let response = cx.run_turns(1).await?;
+        let file_overwritten = if let Some(tool_use) = response.find_tool_call("edit_file") {
+            let input = tool_use.parse_input::<EditFileToolInput>()?;
+            match input.mode {
+                EditFileMode::Edit => false,
+                EditFileMode::Create | EditFileMode::Overwrite => true,
+            }
+        } else {
+            false
+        };
+
+        cx.assert(!file_overwritten, "File should be edited, not overwritten")
+    }
+}

crates/eval/src/examples/planets.rs

@@ -18,6 +18,7 @@ impl Example for Planets {
             language_server: None,
             max_assertions: None,
             profile_id: AgentProfileId::default(),
+            existing_thread_json: None,
         }
     }
 

crates/eval/src/examples/threads/overwrite-file.json

@@ -0,0 +1,262 @@
+{
+  "completion_mode": "normal",
+  "cumulative_token_usage": {
+    "cache_creation_input_tokens": 18383,
+    "cache_read_input_tokens": 97250,
+    "input_tokens": 45,
+    "output_tokens": 776
+  },
+  "detailed_summary_state": "NotGenerated",
+  "exceeded_window_error": null,
+  "initial_project_snapshot": {
+    "timestamp": "2025-05-08T14:31:16.701157512Z",
+    "unsaved_buffer_paths": [],
+    "worktree_snapshots": [
+      {
+        "git_state": {
+          "current_branch": null,
+          "diff": "diff --git a/crates/language_model_selector/src/language_model_selector.rs b/crates/language_model_selector/src/language_model_selector.rs\nindex 6775bee98a..e25c9e1415 100644\n--- a/crates/language_model_selector/src/language_model_selector.rs\n+++ b/crates/language_model_selector/src/language_model_selector.rs\n@@ -410,7 +410,8 @@ impl ModelMatcher {\n     }\n \n     pub fn is_match(self: &Self, info: &ModelInfo) -> bool {\n-        self.matched_ids.contains(&info.model.id().0)\n+        let q = (info.model.provider_id(), info.model.id());\n+        self.matched_models.contains(&q)\n     }\n }\n \n",
+          "head_sha": "9245656485e58a5d6d717d82209bc8c57cb9c539",
+          "remote_url": "git@github.com:zed-industries/zed.git"
+        },
+        "worktree_path": "/home/silver/develop/zed"
+      }
+    ]
+  },
+  "messages": [
+    {
+      "context": "\n<context>\nThe following items were attached by the user. They are up-to-date and don't need to be re-read.\n\n<files>\n```rs zed/crates/language_model_selector/src/language_model_selector.rs\nconst TRY_ZED_PRO_URL [L28]\ntype OnModelChanged [L30]\ntype GetActiveModel [L31]\npub struct LanguageModelSelector [L33-37]\n picker [L34]\n _authenticate_all_providers_task [L35]\n _subscriptions [L36]\nimpl LanguageModelSelector [L39-231]\n pub fn new [L40-81]\n fn handle_language_model_registry_event [L83-104]\n fn authenticate_all_providers [L110-154]\n fn all_models [L156-204]\n pub fn active_model [L206-208]\n fn get_active_model_index [L210-230]\nimpl EventEmitter<DismissEvent> for LanguageModelSelector [L233]\nimpl Focusable for LanguageModelSelector [L235-239]\n fn focus_handle [L236-238]\nimpl Render for LanguageModelSelector [L241-245]\n fn render [L242-244]\npub struct LanguageModelSelectorPopoverMenu [L248-258]\n language_model_selector [L253]\n trigger [L254]\n tooltip [L255]\n handle [L256]\n anchor [L257]\nimpl LanguageModelSelectorPopoverMenu<T, TT> [L260-284]\n pub fn new [L265-278]\n pub fn with_handle [L280-283]\nimpl RenderOnce for LanguageModelSelectorPopoverMenu<T, TT> [L286-304]\n fn render [L291-303]\nstruct ModelInfo [L307-310]\n model [L308]\n icon [L309]\npub struct LanguageModelPickerDelegate [L312-319]\n language_model_selector [L313]\n on_model_changed [L314]\n get_active_model [L315]\n all_models [L316]\n filtered_entries [L317]\n selected_index [L318]\nstruct GroupedModels [L321-324]\n recommended [L322]\n other [L323]\nimpl GroupedModels [L326-385]\n pub fn new [L327-342]\n fn entries [L344-370]\n fn model_infos [L372-384]\nenum LanguageModelPickerEntry [L387-390]\n Model [L388]\n Separator [L389]\nstruct ModelMatcher [L392-396]\n models [L393]\n bg_executor [L394]\n candidates [L395]\nimpl ModelMatcher [L398-452]\n fn new [L399-406]\n pub fn fuzzy_search [L408-424]\n pub fn exact_search [L426-438]\n fn make_match_candidates [L440-451]\nimpl PickerDelegate for LanguageModelPickerDelegate [L454-693]\n type ListItem [L455]\n fn match_count [L457-459]\n fn selected_index [L461-463]\n fn set_selected_index [L465-468]\n fn can_select [L470-480]\n fn placeholder_text [L482-484]\n fn update_matches [L486-546]\n fn confirm [L548-560]\n fn dismissed [L562-566]\n fn render_match [L568-636]\n fn render_footer [L638-692]\n\nShowing symbols 1-71 (total symbols: 71)\n\n```\n</files>\n</context>\n",
+      "creases": [
+        {
+          "end": 140,
+          "icon_path": "icons/file_icons/rust.svg",
+          "label": "language_model_selector.rs",
+          "start": 38
+        }
+      ],
+      "id": 0,
+      "role": "user",
+      "segments": [
+        {
+          "text": "I recently introduced fuzzy search in [@language_model_selector.rs](@file:zed/crates/language_model_selector/src/language_model_selector.rs). Can you write unit-test that check it? You can find a test list of models on images. ",
+          "type": "text"
+        }
+      ],
+      "tool_results": [],
+      "tool_uses": []
+    },
+    {
+      "context": "",
+      "creases": [],
+      "id": 1,
+      "role": "assistant",
+      "segments": [
+        {
+          "text": "I'll help you write unit tests for the fuzzy search functionality in the language model selector. I see that you want to test the fuzzy search with the models shown in the images - both Claude models (3, 3.5, 3.7) and GPT models (GPT-3.5, GPT-4, GPT-4o, etc.).\n\nLet's start by examining the code structure to understand how the fuzzy search works.",
+          "type": "text"
+        }
+      ],
+      "tool_results": [
+        {
+          "content": "zed/crates/language_model_selector/Cargo.toml\nzed/crates/language_model_selector/LICENSE-GPL\nzed/crates/language_model_selector/src\n",
+          "is_error": false,
+          "output": null,
+          "tool_use_id": "toolu_01FvYMtHs763GL1wA5mpTpqn"
+        }
+      ],
+      "tool_uses": [
+        {
+          "id": "toolu_01FvYMtHs763GL1wA5mpTpqn",
+          "input": {
+            "path": "zed/crates/language_model_selector"
+          },
+          "name": "list_directory"
+        }
+      ]
+    },
+    {
+      "context": "",
+      "creases": [],
+      "id": 2,
+      "role": "assistant",
+      "segments": [
+        {
+          "text": "Let's look at the structure of the tests directory or see if there are existing tests:",
+          "type": "text"
+        }
+      ],
+      "tool_results": [
+        {
+          "content": "zed/crates/language_model_selector/src/language_model_selector.rs\n",
+          "is_error": false,
+          "output": null,
+          "tool_use_id": "toolu_01KSLDsLLrf7tgixB1sge3cm"
+        }
+      ],
+      "tool_uses": [
+        {
+          "id": "toolu_01KSLDsLLrf7tgixB1sge3cm",
+          "input": {
+            "path": "zed/crates/language_model_selector/src"
+          },
+          "name": "list_directory"
+        }
+      ]
+    },
+    {
+      "context": "",
+      "creases": [],
+      "id": 3,
+      "role": "assistant",
+      "segments": [
+        {
+          "text": "Let's check the Cargo.toml to understand the dependencies:",
+          "type": "text"
+        }
+      ],
+      "tool_results": [
+        {
+          "content": "[package]\nname = \"language_model_selector\"\nversion = \"0.1.0\"\nedition.workspace = true\npublish.workspace = true\nlicense = \"GPL-3.0-or-later\"\n\n[lints]\nworkspace = true\n\n[lib]\npath = \"src/language_model_selector.rs\"\n\n[dependencies]\ncollections.workspace = true\nfeature_flags.workspace = true\nfuzzy.workspace = true\ngpui.workspace = true\nlanguage_model.workspace = true\nlog.workspace = true\npicker.workspace = true\nproto.workspace = true\nui.workspace = true\nworkspace-hack.workspace = true\nzed_actions.workspace = true\n",
+          "is_error": false,
+          "output": null,
+          "tool_use_id": "toolu_019Je2MLfJhpJr93g5igoRAH"
+        }
+      ],
+      "tool_uses": [
+        {
+          "id": "toolu_019Je2MLfJhpJr93g5igoRAH",
+          "input": {
+            "path": "zed/crates/language_model_selector/Cargo.toml"
+          },
+          "name": "read_file"
+        }
+      ]
+    },
+    {
+      "context": "",
+      "creases": [],
+      "id": 4,
+      "role": "assistant",
+      "segments": [
+        {
+          "text": "Now let's look at the fuzzy search implementation in detail:",
+          "type": "text"
+        }
+      ],
+      "tool_results": [
+        {
+          "content": "struct ModelMatcher {\n    models: Vec<ModelInfo>,\n    bg_executor: BackgroundExecutor,\n    candidates: Vec<StringMatchCandidate>,\n}\n\nimpl ModelMatcher {\n    fn new(models: Vec<ModelInfo>, bg_executor: BackgroundExecutor) -> ModelMatcher {\n        let candidates = Self::make_match_candidates(&models);\n        Self {\n            models,\n            bg_executor,\n            candidates,\n        }\n    }\n\n    pub fn fuzzy_search(&self, query: &str) -> Vec<ModelInfo> {\n        let matches = self.bg_executor.block(match_strings(\n            &self.candidates,\n            &query,\n            false,\n            100,\n            &Default::default(),\n            self.bg_executor.clone(),\n        ));\n\n        let matched_models: Vec<_> = matches\n            .into_iter()\n            .map(|m| self.models[m.candidate_id].clone())\n            .collect();\n\n        matched_models\n    }\n\n    pub fn exact_search(&self, query: &str) -> Vec<ModelInfo> {\n        self.models\n            .iter()\n            .filter(|m| {\n                m.model\n                    .name()\n                    .0\n                    .to_lowercase()\n                    .contains(&query.to_lowercase())\n            })\n            .cloned()\n            .collect::<Vec<_>>()\n    }\n\n    fn make_match_candidates(model_infos: &Vec<ModelInfo>) -> Vec<StringMatchCandidate> {\n        model_infos\n            .iter()\n            .enumerate()\n            .map(|(index, model)| {\n                StringMatchCandidate::new(\n                    index,\n                    &format!(\"{}/{}\", &model.model.provider_id().0, &model.model.name().0),\n                )\n            })\n            .collect::<Vec<_>>()\n    }\n}",
+          "is_error": false,
+          "output": null,
+          "tool_use_id": "toolu_01GpKFEn6hYrXGiS5yBF3urk"
+        }
+      ],
+      "tool_uses": [
+        {
+          "id": "toolu_01GpKFEn6hYrXGiS5yBF3urk",
+          "input": {
+            "end_line": 452,
+            "path": "zed/crates/language_model_selector/src/language_model_selector.rs",
+            "start_line": 392
+          },
+          "name": "read_file"
+        }
+      ]
+    },
+    {
+      "context": "",
+      "creases": [],
+      "id": 5,
+      "role": "assistant",
+      "segments": [
+        {
+          "text": "Let's now check if there's an existing test module:",
+          "type": "text"
+        }
+      ],
+      "tool_results": [
+        {
+          "content": "No matches found",
+          "is_error": false,
+          "output": null,
+          "tool_use_id": "toolu_01RZAvFvpMq16Dwh6d6cnVzy"
+        }
+      ],
+      "tool_uses": [
+        {
+          "id": "toolu_01RZAvFvpMq16Dwh6d6cnVzy",
+          "input": {
+            "include_pattern": "zed/crates/language_model_selector/**/*.rs",
+            "regex": "mod tests"
+          },
+          "name": "grep"
+        }
+      ]
+    },
+    {
+      "context": "",
+      "creases": [],
+      "id": 6,
+      "role": "assistant",
+      "segments": [
+        {
+          "text": "Now I'll create a test module for the ModelMatcher's fuzzy search functionality. Let's create this test module:",
+          "type": "text"
+        }
+      ],
+      "tool_results": [],
+      "tool_uses": []
+    }
+  ],
+  "model": {
+    "model": "claude-3-7-sonnet-latest",
+    "provider": "zed.dev"
+  },
+  "profile": "Write",
+  "request_token_usage": [
+    {
+      "cache_creation_input_tokens": 9581,
+      "input_tokens": 4,
+      "output_tokens": 5
+    },
+    {
+      "cache_creation_input_tokens": 204,
+      "cache_read_input_tokens": 9581,
+      "input_tokens": 6,
+      "output_tokens": 5
+    },
+    {
+      "cache_creation_input_tokens": 104,
+      "cache_read_input_tokens": 9785,
+      "input_tokens": 6,
+      "output_tokens": 5
+    },
+    {
+      "cache_creation_input_tokens": 239,
+      "cache_read_input_tokens": 9889,
+      "input_tokens": 6,
+      "output_tokens": 5
+    },
+    {
+      "cache_creation_input_tokens": 569,
+      "cache_read_input_tokens": 10128,
+      "input_tokens": 5,
+      "output_tokens": 5
+    },
+    {
+      "cache_creation_input_tokens": 87,
+      "cache_read_input_tokens": 10697,
+      "input_tokens": 5,
+      "output_tokens": 2
+    },
+    {
+      "cache_creation_input_tokens": 7355,
+      "cache_read_input_tokens": 10784,
+      "input_tokens": 5,
+      "output_tokens": 3
+    }
+  ],
+  "summary": "Fuzzy Search Testing Language Model Selector",
+  "updated_at": "2025-05-08T18:20:34.205405751Z",
+  "version": "0.2.0"
+}

crates/eval/src/instance.rs

@@ -1,4 +1,4 @@
-use agent::{Message, MessageSegment, ThreadStore};
+use agent::{Message, MessageSegment, SerializedThread, ThreadStore};
 use anyhow::{Context, Result, anyhow, bail};
 use assistant_tool::ToolWorkingSet;
 use client::proto::LspWorkProgress;
@@ -9,7 +9,7 @@ use handlebars::Handlebars;
 use language::{Buffer, DiagnosticSeverity, OffsetRangeExt as _};
 use language_model::{
     LanguageModel, LanguageModelCompletionEvent, LanguageModelRequest, LanguageModelRequestMessage,
-    MessageContent, Role, TokenUsage,
+    LanguageModelToolResultContent, MessageContent, Role, TokenUsage,
 };
 use project::lsp_store::OpenLspBufferHandle;
 use project::{DiagnosticSummary, Project, ProjectPath};
@@ -312,7 +312,14 @@ impl ExampleInstance {
             thread_store.update(cx, |thread_store, cx| thread_store.load_profile_by_id(profile_id, cx)).expect("Failed to load profile");
 
             let thread =
-                thread_store.update(cx, |thread_store, cx| thread_store.create_thread(cx))?;
+                thread_store.update(cx, |thread_store, cx| {
+                    if let Some(json) = &meta.existing_thread_json {
+                        let serialized = SerializedThread::from_json(json.as_bytes()).expect("Can't read serialized thread");
+                        thread_store.create_thread_from_serialized(serialized, cx)
+                    } else {
+                        thread_store.create_thread(cx)
+                    }
+                })?;
 
 
             thread.update(cx, |thread, _cx| {
@@ -964,7 +971,15 @@ impl RequestMarkdown {
                         if tool_result.is_error {
                             messages.push_str("**ERROR:**\n");
                         }
-                        messages.push_str(&format!("{}\n\n", tool_result.content));
+
+                        match &tool_result.content {
+                            LanguageModelToolResultContent::Text(str) => {
+                                writeln!(messages, "{}\n", str).ok();
+                            }
+                            LanguageModelToolResultContent::Image(image) => {
+                                writeln!(messages, "![Image](data:base64,{})\n", image.source).ok();
+                            }
+                        }
 
                         if let Some(output) = tool_result.output.as_ref() {
                             writeln!(

crates/extension/Cargo.toml

@@ -17,6 +17,7 @@ async-compression.workspace = true
 async-tar.workspace = true
 async-trait.workspace = true
 collections.workspace = true
+dap.workspace = true
 fs.workspace = true
 futures.workspace = true
 gpui.workspace = true
@@ -29,6 +30,7 @@ parking_lot.workspace = true
 semantic_version.workspace = true
 serde.workspace = true
 serde_json.workspace = true
+task.workspace = true
 toml.workspace = true
 util.workspace = true
 wasm-encoder.workspace = true

crates/extension/src/extension.rs

@@ -135,6 +135,13 @@ pub trait Extension: Send + Sync + 'static {
         package_name: Arc<str>,
         kv_store: Arc<dyn KeyValueStoreDelegate>,
     ) -> Result<()>;
+
+    async fn get_dap_binary(
+        &self,
+        dap_name: Arc<str>,
+        config: DebugTaskDefinition,
+        user_installed_path: Option<PathBuf>,
+    ) -> Result<DebugAdapterBinary>;
 }
 
 pub fn parse_wasm_extension_version(

crates/extension/src/extension_host_proxy.rs

@@ -29,6 +29,7 @@ pub struct ExtensionHostProxy {
     slash_command_proxy: RwLock<Option<Arc<dyn ExtensionSlashCommandProxy>>>,
     context_server_proxy: RwLock<Option<Arc<dyn ExtensionContextServerProxy>>>,
     indexed_docs_provider_proxy: RwLock<Option<Arc<dyn ExtensionIndexedDocsProviderProxy>>>,
+    debug_adapter_provider_proxy: RwLock<Option<Arc<dyn ExtensionDebugAdapterProviderProxy>>>,
 }
 
 impl ExtensionHostProxy {
@@ -54,6 +55,7 @@ impl ExtensionHostProxy {
             slash_command_proxy: RwLock::default(),
             context_server_proxy: RwLock::default(),
             indexed_docs_provider_proxy: RwLock::default(),
+            debug_adapter_provider_proxy: RwLock::default(),
         }
     }
 
@@ -93,6 +95,11 @@ impl ExtensionHostProxy {
             .write()
             .replace(Arc::new(proxy));
     }
+    pub fn register_debug_adapter_proxy(&self, proxy: impl ExtensionDebugAdapterProviderProxy) {
+        self.debug_adapter_provider_proxy
+            .write()
+            .replace(Arc::new(proxy));
+    }
 }
 
 pub trait ExtensionThemeProxy: Send + Sync + 'static {
@@ -402,3 +409,17 @@ impl ExtensionIndexedDocsProviderProxy for ExtensionHostProxy {
         proxy.register_indexed_docs_provider(extension, provider_id)
     }
 }
+
+pub trait ExtensionDebugAdapterProviderProxy: Send + Sync + 'static {
+    fn register_debug_adapter(&self, extension: Arc<dyn Extension>, debug_adapter_name: Arc<str>);
+}
+
+impl ExtensionDebugAdapterProviderProxy for ExtensionHostProxy {
+    fn register_debug_adapter(&self, extension: Arc<dyn Extension>, debug_adapter_name: Arc<str>) {
+        let Some(proxy) = self.debug_adapter_provider_proxy.read().clone() else {
+            return;
+        };
+
+        proxy.register_debug_adapter(extension, debug_adapter_name)
+    }
+}

crates/extension/src/types.rs

@@ -1,10 +1,12 @@
 mod context_server;
+mod dap;
 mod lsp;
 mod slash_command;
 
 use std::ops::Range;
 
 pub use context_server::*;
+pub use dap::*;
 pub use lsp::*;
 pub use slash_command::*;
 

crates/extension/src/types/dap.rs

@@ -0,0 +1,5 @@
+pub use dap::{
+    StartDebuggingRequestArguments, StartDebuggingRequestArgumentsRequest,
+    adapters::{DebugAdapterBinary, DebugTaskDefinition, TcpArguments},
+};
+pub use task::{AttachRequest, DebugRequest, LaunchRequest, TcpArgumentsTemplate};

crates/extension_api/Cargo.toml

@@ -1,12 +1,13 @@
 [package]
 name = "zed_extension_api"
-version = "0.5.0"
+version = "0.6.0"
 description = "APIs for creating Zed extensions in Rust"
 repository = "https://github.com/zed-industries/zed"
 documentation = "https://docs.rs/zed_extension_api"
 keywords = ["zed", "extension"]
 edition.workspace = true
-publish = true
+# Change back to `true` when we're ready to publish v0.6.0.
+publish = false
 license = "Apache-2.0"
 
 [lints]

crates/extension_api/src/extension_api.rs

@@ -187,6 +187,16 @@ pub trait Extension: Send + Sync {
     ) -> Result<(), String> {
         Err("`index_docs` not implemented".to_string())
     }
+
+    /// Returns the debug adapter binary for the specified adapter name and configuration.
+    fn get_dap_binary(
+        &mut self,
+        _adapter_name: String,
+        _config: DebugTaskDefinition,
+        _user_provided_path: Option<String>,
+    ) -> Result<DebugAdapterBinary, String> {
+        Err("`get_dap_binary` not implemented".to_string())
+    }
 }
 
 /// Registers the provided type as a Zed extension.
@@ -228,7 +238,7 @@ mod wit {
 
     wit_bindgen::generate!({
         skip: ["init-extension"],
-        path: "./wit/since_v0.5.0",
+        path: "./wit/since_v0.6.0",
     });
 }
 
@@ -371,6 +381,14 @@ impl wit::Guest for Component {
     ) -> Result<(), String> {
         extension().index_docs(provider, package, database)
     }
+
+    fn get_dap_binary(
+        adapter_name: String,
+        config: DebugTaskDefinition,
+        user_installed_path: Option<String>,
+    ) -> Result<DebugAdapterBinary, String> {
+        extension().get_dap_binary(adapter_name, config, user_installed_path)
+    }
 }
 
 /// The ID of a language server.

crates/extension_api/wit/since_v0.6.0/common.wit

@@ -0,0 +1,12 @@
+interface common {
+    /// A (half-open) range (`[start, end)`).
+    record range {
+        /// The start of the range (inclusive).
+        start: u32,
+        /// The end of the range (exclusive).
+        end: u32,
+    }
+
+    /// A list of environment variables.
+    type env-vars = list<tuple<string, string>>;
+}

crates/extension_api/wit/since_v0.6.0/context-server.wit

@@ -0,0 +1,11 @@
+interface context-server {
+    /// Configuration for context server setup and installation.
+    record context-server-configuration {
+        /// Installation instructions in Markdown format.
+        installation-instructions: string,
+        /// JSON schema for settings validation.
+        settings-schema: string,
+        /// Default settings template.
+        default-settings: string,
+    }
+}

crates/extension_api/wit/since_v0.6.0/dap.wit

@@ -0,0 +1,56 @@
+interface dap {
+    use common.{env-vars};
+    record launch-request {
+        program: string,
+        cwd: option<string>,
+        args: list<string>,
+        envs: env-vars,
+    }
+
+    record attach-request {
+        process-id: option<u32>,
+    }
+
+    variant debug-request {
+        launch(launch-request),
+        attach(attach-request)
+    }
+
+    record tcp-arguments {
+        port: u16,
+        host: u32,
+        timeout: option<u64>,
+    }
+
+    record tcp-arguments-template {
+        port: option<u16>,
+        host: option<u32>,
+        timeout: option<u64>,
+    }
+    record debug-task-definition {
+        label: string,
+        adapter: string,
+        request: debug-request,
+        initialize-args: option<string>,
+        stop-on-entry: option<bool>,
+        tcp-connection: option<tcp-arguments-template>,
+    }
+
+    enum start-debugging-request-arguments-request {
+        launch,
+        attach,
+    }
+    record start-debugging-request-arguments {
+        configuration: string,
+        request: start-debugging-request-arguments-request,
+
+    }
+    record debug-adapter-binary {
+        command: string,
+        arguments: list<string>,
+        envs: env-vars,
+        cwd: option<string>,
+        connection: option<tcp-arguments>,
+        request-args: start-debugging-request-arguments
+    }
+}

crates/extension_api/wit/since_v0.6.0/extension.wit

@@ -0,0 +1,161 @@
+package zed:extension;
+
+world extension {
+    import context-server;
+    import dap;
+    import github;
+    import http-client;
+    import platform;
+    import process;
+    import nodejs;
+
+    use common.{env-vars, range};
+    use context-server.{context-server-configuration};
+    use dap.{debug-adapter-binary, debug-task-definition};
+    use lsp.{completion, symbol};
+    use process.{command};
+    use slash-command.{slash-command, slash-command-argument-completion, slash-command-output};
+
+    /// Initializes the extension.
+    export init-extension: func();
+
+    /// The type of a downloaded file.
+    enum downloaded-file-type {
+        /// A gzipped file (`.gz`).
+        gzip,
+        /// A gzipped tar archive (`.tar.gz`).
+        gzip-tar,
+        /// A ZIP file (`.zip`).
+        zip,
+        /// An uncompressed file.
+        uncompressed,
+    }
+
+    /// The installation status for a language server.
+    variant language-server-installation-status {
+        /// The language server has no installation status.
+        none,
+        /// The language server is being downloaded.
+        downloading,
+        /// The language server is checking for updates.
+        checking-for-update,
+        /// The language server installation failed for specified reason.
+        failed(string),
+    }
+
+    record settings-location {
+        worktree-id: u64,
+        path: string,
+    }
+
+    import get-settings: func(path: option<settings-location>, category: string, key: option<string>) -> result<string, string>;
+
+    /// Downloads a file from the given URL and saves it to the given path within the extension's
+    /// working directory.
+    ///
+    /// The file will be extracted according to the given file type.
+    import download-file: func(url: string, file-path: string, file-type: downloaded-file-type) -> result<_, string>;
+
+    /// Makes the file at the given path executable.
+    import make-file-executable: func(filepath: string) -> result<_, string>;
+
+    /// Updates the installation status for the given language server.
+    import set-language-server-installation-status: func(language-server-name: string, status: language-server-installation-status);
+
+    /// A Zed worktree.
+    resource worktree {
+        /// Returns the ID of the worktree.
+        id: func() -> u64;
+        /// Returns the root path of the worktree.
+        root-path: func() -> string;
+        /// Returns the textual contents of the specified file in the worktree.
+        read-text-file: func(path: string) -> result<string, string>;
+        /// Returns the path to the given binary name, if one is present on the `$PATH`.
+        which: func(binary-name: string) -> option<string>;
+        /// Returns the current shell environment.
+        shell-env: func() -> env-vars;
+    }
+
+    /// A Zed project.
+    resource project {
+        /// Returns the IDs of all of the worktrees in this project.
+        worktree-ids: func() -> list<u64>;
+    }
+
+    /// A key-value store.
+    resource key-value-store {
+        /// Inserts an entry under the specified key.
+        insert: func(key: string, value: string) -> result<_, string>;
+    }
+
+    /// Returns the command used to start up the language server.
+    export language-server-command: func(language-server-id: string, worktree: borrow<worktree>) -> result<command, string>;
+
+    /// Returns the initialization options to pass to the language server on startup.
+    ///
+    /// The initialization options are represented as a JSON string.
+    export language-server-initialization-options: func(language-server-id: string, worktree: borrow<worktree>) -> result<option<string>, string>;
+
+    /// Returns the workspace configuration options to pass to the language server.
+    export language-server-workspace-configuration: func(language-server-id: string, worktree: borrow<worktree>) -> result<option<string>, string>;
+
+    /// Returns the initialization options to pass to the other language server.
+    export language-server-additional-initialization-options: func(language-server-id: string, target-language-server-id: string, worktree: borrow<worktree>) -> result<option<string>, string>;
+
+    /// Returns the workspace configuration options to pass to the other language server.
+    export language-server-additional-workspace-configuration: func(language-server-id: string, target-language-server-id: string, worktree: borrow<worktree>) -> result<option<string>, string>;
+
+    /// A label containing some code.
+    record code-label {
+        /// The source code to parse with Tree-sitter.
+        code: string,
+        /// The spans to display in the label.
+        spans: list<code-label-span>,
+        /// The range of the displayed label to include when filtering.
+        filter-range: range,
+    }
+
+    /// A span within a code label.
+    variant code-label-span {
+        /// A range into the parsed code.
+        code-range(range),
+        /// A span containing a code literal.
+        literal(code-label-span-literal),
+    }
+
+    /// A span containing a code literal.
+    record code-label-span-literal {
+        /// The literal text.
+        text: string,
+        /// The name of the highlight to use for this literal.
+        highlight-name: option<string>,
+    }
+
+    export labels-for-completions: func(language-server-id: string, completions: list<completion>) -> result<list<option<code-label>>, string>;
+    export labels-for-symbols: func(language-server-id: string, symbols: list<symbol>) -> result<list<option<code-label>>, string>;
+
+    /// Returns the completions that should be shown when completing the provided slash command with the given query.
+    export complete-slash-command-argument: func(command: slash-command, args: list<string>) -> result<list<slash-command-argument-completion>, string>;
+
+    /// Returns the output from running the provided slash command.
+    export run-slash-command: func(command: slash-command, args: list<string>, worktree: option<borrow<worktree>>) -> result<slash-command-output, string>;
+
+    /// Returns the command used to start up a context server.
+    export context-server-command: func(context-server-id: string, project: borrow<project>) -> result<command, string>;
+
+    /// Returns the configuration for a context server.
+    export context-server-configuration: func(context-server-id: string, project: borrow<project>) -> result<option<context-server-configuration>, string>;
+
+    /// Returns a list of packages as suggestions to be included in the `/docs`
+    /// search results.
+    ///
+    /// This can be used to provide completions for known packages (e.g., from the
+    /// local project or a registry) before a package has been indexed.
+    export suggest-docs-packages: func(provider-name: string) -> result<list<string>, string>;
+
+    /// Indexes the docs for the specified package.
+    export index-docs: func(provider-name: string, package-name: string, database: borrow<key-value-store>) -> result<_, string>;
+
+    /// Returns a configured debug adapter binary for a given debug task.
+    export get-dap-binary: func(adapter-name: string, config: debug-task-definition, user-installed-path: option<string>) -> result<debug-adapter-binary, string>;
+}

crates/extension_api/wit/since_v0.6.0/github.wit

@@ -0,0 +1,35 @@
+interface github {
+    /// A GitHub release.
+    record github-release {
+        /// The version of the release.
+        version: string,
+        /// The list of assets attached to the release.
+        assets: list<github-release-asset>,
+    }
+
+    /// An asset from a GitHub release.
+    record github-release-asset {
+        /// The name of the asset.
+        name: string,
+        /// The download URL for the asset.
+        download-url: string,
+    }
+
+    /// The options used to filter down GitHub releases.
+    record github-release-options {
+        /// Whether releases without assets should be included.
+        require-assets: bool,
+        /// Whether pre-releases should be included.
+        pre-release: bool,
+    }
+
+    /// Returns the latest release for the given GitHub repository.
+    ///
+    /// Takes repo as a string in the form "<owner-name>/<repo-name>", for example: "zed-industries/zed".
+    latest-github-release: func(repo: string, options: github-release-options) -> result<github-release, string>;
+
+    /// Returns the GitHub release with the specified tag name for the given GitHub repository.
+    ///
+    /// Returns an error if a release with the given tag name does not exist.
+    github-release-by-tag-name: func(repo: string, tag: string) -> result<github-release, string>;
+}

crates/extension_api/wit/since_v0.6.0/http-client.wit

@@ -0,0 +1,67 @@
+interface http-client {
+    /// An HTTP request.
+    record http-request {
+        /// The HTTP method for the request.
+        method: http-method,
+        /// The URL to which the request should be made.
+        url: string,
+        /// The headers for the request.
+        headers: list<tuple<string, string>>,
+        /// The request body.
+        body: option<list<u8>>,
+        /// The policy to use for redirects.
+        redirect-policy: redirect-policy,
+    }
+
+    /// HTTP methods.
+    enum http-method {
+        /// `GET`
+        get,
+        /// `HEAD`
+        head,
+        /// `POST`
+        post,
+        /// `PUT`
+        put,
+        /// `DELETE`
+        delete,
+        /// `OPTIONS`
+        options,
+        /// `PATCH`
+        patch,
+    }
+
+    /// The policy for dealing with redirects received from the server.
+    variant redirect-policy {
+        /// Redirects from the server will not be followed.
+        ///
+        /// This is the default behavior.
+        no-follow,
+        /// Redirects from the server will be followed up to the specified limit.
+        follow-limit(u32),
+        /// All redirects from the server will be followed.
+        follow-all,
+    }
+
+    /// An HTTP response.
+    record http-response {
+        /// The response headers.
+        headers: list<tuple<string, string>>,
+        /// The response body.
+        body: list<u8>,
+    }
+
+    /// Performs an HTTP request and returns the response.
+    fetch: func(req: http-request) -> result<http-response, string>;
+
+    /// An HTTP response stream.
+    resource http-response-stream {
+        /// Retrieves the next chunk of data from the response stream.
+        ///
+        /// Returns `Ok(None)` if the stream has ended.
+        next-chunk: func() -> result<option<list<u8>>, string>;
+    }
+
+    /// Performs an HTTP request and returns a response stream.
+    fetch-stream: func(req: http-request) -> result<http-response-stream, string>;
+}

crates/extension_api/wit/since_v0.6.0/lsp.wit

@@ -0,0 +1,90 @@
+interface lsp {
+    /// An LSP completion.
+    record completion {
+        label: string,
+        label-details: option<completion-label-details>,
+        detail: option<string>,
+        kind: option<completion-kind>,
+        insert-text-format: option<insert-text-format>,
+    }
+
+    /// The kind of an LSP completion.
+    variant completion-kind {
+        text,
+        method,
+        function,
+        %constructor,
+        field,
+        variable,
+        class,
+        %interface,
+        module,
+        property,
+        unit,
+        value,
+        %enum,
+        keyword,
+        snippet,
+        color,
+        file,
+        reference,
+        folder,
+        enum-member,
+        constant,
+        struct,
+        event,
+        operator,
+        type-parameter,
+        other(s32),
+    }
+
+    /// Label details for an LSP completion.
+    record completion-label-details {
+        detail: option<string>,
+        description: option<string>,
+    }
+
+    /// Defines how to interpret the insert text in a completion item.
+    variant insert-text-format {
+        plain-text,
+        snippet,
+        other(s32),
+    }
+
+    /// An LSP symbol.
+    record symbol {
+        kind: symbol-kind,
+        name: string,
+    }
+
+    /// The kind of an LSP symbol.
+    variant symbol-kind {
+        file,
+        module,
+        namespace,
+        %package,
+        class,
+        method,
+        property,
+        field,
+        %constructor,
+        %enum,
+        %interface,
+        function,
+        variable,
+        constant,
+        %string,
+        number,
+        boolean,
+        array,
+        object,
+        key,
+        null,
+        enum-member,
+        struct,
+        event,
+        operator,
+        type-parameter,
+        other(s32),
+    }
+}

crates/extension_api/wit/since_v0.6.0/nodejs.wit

@@ -0,0 +1,13 @@
+interface nodejs {
+    /// Returns the path to the Node binary used by Zed.
+    node-binary-path: func() -> result<string, string>;
+
+    /// Returns the latest version of the given NPM package.
+    npm-package-latest-version: func(package-name: string) -> result<string, string>;
+
+    /// Returns the installed version of the given NPM package, if it exists.
+    npm-package-installed-version: func(package-name: string) -> result<option<string>, string>;
+
+    /// Installs the specified NPM package.
+    npm-install-package: func(package-name: string, version: string) -> result<_, string>;
+}

crates/extension_api/wit/since_v0.6.0/platform.wit

@@ -0,0 +1,24 @@
+interface platform {
+    /// An operating system.
+    enum os {
+        /// macOS.
+        mac,
+        /// Linux.
+        linux,
+        /// Windows.
+        windows,
+    }
+
+    /// A platform architecture.
+    enum architecture {
+        /// AArch64 (e.g., Apple Silicon).
+        aarch64,
+        /// x86.
+        x86,
+        /// x86-64.
+        x8664,
+    }
+
+    /// Gets the current operating system and architecture.
+    current-platform: func() -> tuple<os, architecture>;
+}

crates/extension_api/wit/since_v0.6.0/process.wit

@@ -0,0 +1,29 @@
+interface process {
+    use common.{env-vars};
+
+    /// A command.
+    record command {
+        /// The command to execute.
+        command: string,
+        /// The arguments to pass to the command.
+        args: list<string>,
+        /// The environment variables to set for the command.
+        env: env-vars,
+    }
+
+    /// The output of a finished process.
+    record output {
+        /// The status (exit code) of the process.
+        ///
+        /// On Unix, this will be `None` if the process was terminated by a signal.
+        status: option<s32>,
+        /// The data that the process wrote to stdout.
+        stdout: list<u8>,
+        /// The data that the process wrote to stderr.
+        stderr: list<u8>,
+    }
+
+    /// Executes the given command as a child process, waiting for it to finish
+    /// and collecting all of its output.
+    run-command: func(command: command) -> result<output, string>;
+}

crates/extension_api/wit/since_v0.6.0/settings.rs

@@ -0,0 +1,40 @@
+use serde::{Deserialize, Serialize};
+use std::{collections::HashMap, num::NonZeroU32};
+
+/// The settings for a particular language.
+#[derive(Debug, Serialize, Deserialize)]
+pub struct LanguageSettings {
+    /// How many columns a tab should occupy.
+    pub tab_size: NonZeroU32,
+}
+
+/// The settings for a particular language server.
+#[derive(Default, Debug, Serialize, Deserialize)]
+pub struct LspSettings {
+    /// The settings for the language server binary.
+    pub binary: Option<CommandSettings>,
+    /// The initialization options to pass to the language server.
+    pub initialization_options: Option<serde_json::Value>,
+    /// The settings to pass to language server.
+    pub settings: Option<serde_json::Value>,
+}
+
+/// The settings for a particular context server.
+#[derive(Default, Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub struct ContextServerSettings {
+    /// The settings for the context server binary.
+    pub command: Option<CommandSettings>,
+    /// The settings to pass to the context server.
+    pub settings: Option<serde_json::Value>,
+}
+
+/// The settings for a command.
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq)]
+pub struct CommandSettings {
+    /// The path to the command.
+    pub path: Option<String>,
+    /// The arguments to pass to the command.
+    pub arguments: Option<Vec<String>>,
+    /// The environment variables.
+    pub env: Option<HashMap<String, String>>,
+}

crates/extension_api/wit/since_v0.6.0/slash-command.wit

@@ -0,0 +1,41 @@
+interface slash-command {
+    use common.{range};
+
+    /// A slash command for use in the Assistant.
+    record slash-command {
+        /// The name of the slash command.
+        name: string,
+        /// The description of the slash command.
+        description: string,
+        /// The tooltip text to display for the run button.
+        tooltip-text: string,
+        /// Whether this slash command requires an argument.
+        requires-argument: bool,
+    }
+
+    /// The output of a slash command.
+    record slash-command-output {
+        /// The text produced by the slash command.
+        text: string,
+        /// The list of sections to show in the slash command placeholder.
+        sections: list<slash-command-output-section>,
+    }
+
+    /// A section in the slash command output.
+    record slash-command-output-section {
+        /// The range this section occupies.
+        range: range,
+        /// The label to display in the placeholder for this section.
+        label: string,
+    }
+
+    /// A completion for a slash command argument.
+    record slash-command-argument-completion {
+        /// The label to display for this completion.
+        label: string,
+        /// The new text that should be inserted into the command when this completion is accepted.
+        new-text: string,
+        /// Whether the command should be run when accepting this completion.
+        run-command: bool,
+    }
+}

crates/extension_host/Cargo.toml

@@ -22,6 +22,7 @@ async-tar.workspace = true
 async-trait.workspace = true
 client.workspace = true
 collections.workspace = true
+dap.workspace = true
 extension.workspace = true
 fs.workspace = true
 futures.workspace = true

crates/extension_host/src/wasm_host.rs

@@ -4,9 +4,9 @@ use crate::ExtensionManifest;
 use anyhow::{Context as _, Result, anyhow, bail};
 use async_trait::async_trait;
 use extension::{
-    CodeLabel, Command, Completion, ContextServerConfiguration, ExtensionHostProxy,
-    KeyValueStoreDelegate, ProjectDelegate, SlashCommand, SlashCommandArgumentCompletion,
-    SlashCommandOutput, Symbol, WorktreeDelegate,
+    CodeLabel, Command, Completion, ContextServerConfiguration, DebugAdapterBinary,
+    DebugTaskDefinition, ExtensionHostProxy, KeyValueStoreDelegate, ProjectDelegate, SlashCommand,
+    SlashCommandArgumentCompletion, SlashCommandOutput, Symbol, WorktreeDelegate,
 };
 use fs::{Fs, normalize_path};
 use futures::future::LocalBoxFuture;
@@ -374,6 +374,25 @@ impl extension::Extension for WasmExtension {
         })
         .await
     }
+    async fn get_dap_binary(
+        &self,
+        dap_name: Arc<str>,
+        config: DebugTaskDefinition,
+        user_installed_path: Option<PathBuf>,
+    ) -> Result<DebugAdapterBinary> {
+        self.call(|extension, store| {
+            async move {
+                let dap_binary = extension
+                    .call_get_dap_binary(store, dap_name, config, user_installed_path)
+                    .await?
+                    .map_err(|err| anyhow!("{err:?}"))?;
+                let dap_binary = dap_binary.try_into()?;
+                Ok(dap_binary)
+            }
+            .boxed()
+        })
+        .await
+    }
 }
 
 pub struct WasmState {

crates/extension_host/src/wasm_host/wit.rs

@@ -6,16 +6,17 @@ mod since_v0_2_0;
 mod since_v0_3_0;
 mod since_v0_4_0;
 mod since_v0_5_0;
-use extension::{KeyValueStoreDelegate, WorktreeDelegate};
+mod since_v0_6_0;
+use extension::{DebugTaskDefinition, KeyValueStoreDelegate, WorktreeDelegate};
 use language::LanguageName;
 use lsp::LanguageServerName;
 use release_channel::ReleaseChannel;
-use since_v0_5_0 as latest;
 
 use super::{WasmState, wasm_engine};
 use anyhow::{Context as _, Result, anyhow};
 use semantic_version::SemanticVersion;
-use std::{ops::RangeInclusive, sync::Arc};
+use since_v0_6_0 as latest;
+use std::{ops::RangeInclusive, path::PathBuf, sync::Arc};
 use wasmtime::{
     Store,
     component::{Component, Linker, Resource},
@@ -24,7 +25,7 @@ use wasmtime::{
 #[cfg(test)]
 pub use latest::CodeLabelSpanLiteral;
 pub use latest::{
-    CodeLabel, CodeLabelSpan, Command, ExtensionProject, Range, SlashCommand,
+    CodeLabel, CodeLabelSpan, Command, DebugAdapterBinary, ExtensionProject, Range, SlashCommand,
     zed::extension::context_server::ContextServerConfiguration,
     zed::extension::lsp::{
         Completion, CompletionKind, CompletionLabelDetails, InsertTextFormat, Symbol, SymbolKind,
@@ -62,7 +63,7 @@ pub fn wasm_api_version_range(release_channel: ReleaseChannel) -> RangeInclusive
 
     let max_version = match release_channel {
         ReleaseChannel::Dev | ReleaseChannel::Nightly => latest::MAX_VERSION,
-        ReleaseChannel::Stable | ReleaseChannel::Preview => latest::MAX_VERSION,
+        ReleaseChannel::Stable | ReleaseChannel::Preview => since_v0_5_0::MAX_VERSION,
     };
 
     since_v0_0_1::MIN_VERSION..=max_version
@@ -92,6 +93,7 @@ pub fn authorize_access_to_unreleased_wasm_api_version(
 }
 
 pub enum Extension {
+    V0_6_0(since_v0_6_0::Extension),
     V0_5_0(since_v0_5_0::Extension),
     V0_4_0(since_v0_4_0::Extension),
     V0_3_0(since_v0_3_0::Extension),
@@ -113,10 +115,21 @@ impl Extension {
         let _ = release_channel;
 
         if version >= latest::MIN_VERSION {
+            authorize_access_to_unreleased_wasm_api_version(release_channel)?;
+
             let extension =
                 latest::Extension::instantiate_async(store, component, latest::linker())
                     .await
                     .context("failed to instantiate wasm extension")?;
+            Ok(Self::V0_6_0(extension))
+        } else if version >= since_v0_5_0::MIN_VERSION {
+            let extension = since_v0_5_0::Extension::instantiate_async(
+                store,
+                component,
+                since_v0_5_0::linker(),
+            )
+            .await
+            .context("failed to instantiate wasm extension")?;
             Ok(Self::V0_5_0(extension))
         } else if version >= since_v0_4_0::MIN_VERSION {
             let extension = since_v0_4_0::Extension::instantiate_async(
@@ -186,6 +199,7 @@ impl Extension {
 
     pub async fn call_init_extension(&self, store: &mut Store<WasmState>) -> Result<()> {
         match self {
+            Extension::V0_6_0(ext) => ext.call_init_extension(store).await,
             Extension::V0_5_0(ext) => ext.call_init_extension(store).await,
             Extension::V0_4_0(ext) => ext.call_init_extension(store).await,
             Extension::V0_3_0(ext) => ext.call_init_extension(store).await,
@@ -205,6 +219,10 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Command, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_language_server_command(store, &language_server_id.0, resource)
+                    .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_language_server_command(store, &language_server_id.0, resource)
                     .await
@@ -263,6 +281,14 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Option<String>, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_language_server_initialization_options(
+                    store,
+                    &language_server_id.0,
+                    resource,
+                )
+                .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_language_server_initialization_options(
                     store,
@@ -344,6 +370,14 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Option<String>, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_language_server_workspace_configuration(
+                    store,
+                    &language_server_id.0,
+                    resource,
+                )
+                .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_language_server_workspace_configuration(
                     store,
@@ -404,6 +438,15 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Option<String>, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_language_server_additional_initialization_options(
+                    store,
+                    &language_server_id.0,
+                    &target_language_server_id.0,
+                    resource,
+                )
+                .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_language_server_additional_initialization_options(
                     store,
@@ -439,6 +482,15 @@ impl Extension {
         resource: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> Result<Result<Option<String>, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_language_server_additional_workspace_configuration(
+                    store,
+                    &language_server_id.0,
+                    &target_language_server_id.0,
+                    resource,
+                )
+                .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_language_server_additional_workspace_configuration(
                     store,
@@ -473,10 +525,23 @@ impl Extension {
         completions: Vec<latest::Completion>,
     ) -> Result<Result<Vec<Option<CodeLabel>>, String>> {
         match self {
-            Extension::V0_5_0(ext) => {
+            Extension::V0_6_0(ext) => {
                 ext.call_labels_for_completions(store, &language_server_id.0, &completions)
                     .await
             }
+            Extension::V0_5_0(ext) => Ok(ext
+                .call_labels_for_completions(
+                    store,
+                    &language_server_id.0,
+                    &completions.into_iter().collect::<Vec<_>>(),
+                )
+                .await?
+                .map(|labels| {
+                    labels
+                        .into_iter()
+                        .map(|label| label.map(Into::into))
+                        .collect()
+                })),
             Extension::V0_4_0(ext) => Ok(ext
                 .call_labels_for_completions(
                     store,
@@ -553,10 +618,23 @@ impl Extension {
         symbols: Vec<latest::Symbol>,
     ) -> Result<Result<Vec<Option<CodeLabel>>, String>> {
         match self {
-            Extension::V0_5_0(ext) => {
+            Extension::V0_6_0(ext) => {
                 ext.call_labels_for_symbols(store, &language_server_id.0, &symbols)
                     .await
             }
+            Extension::V0_5_0(ext) => Ok(ext
+                .call_labels_for_symbols(
+                    store,
+                    &language_server_id.0,
+                    &symbols.into_iter().collect::<Vec<_>>(),
+                )
+                .await?
+                .map(|labels| {
+                    labels
+                        .into_iter()
+                        .map(|label| label.map(Into::into))
+                        .collect()
+                })),
             Extension::V0_4_0(ext) => Ok(ext
                 .call_labels_for_symbols(
                     store,
@@ -633,6 +711,10 @@ impl Extension {
         arguments: &[String],
     ) -> Result<Result<Vec<SlashCommandArgumentCompletion>, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_complete_slash_command_argument(store, command, arguments)
+                    .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_complete_slash_command_argument(store, command, arguments)
                     .await
@@ -667,6 +749,10 @@ impl Extension {
         resource: Option<Resource<Arc<dyn WorktreeDelegate>>>,
     ) -> Result<Result<SlashCommandOutput, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_run_slash_command(store, command, arguments, resource)
+                    .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_run_slash_command(store, command, arguments, resource)
                     .await
@@ -700,6 +786,10 @@ impl Extension {
         project: Resource<ExtensionProject>,
     ) -> Result<Result<Command, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_context_server_command(store, &context_server_id, project)
+                    .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_context_server_command(store, &context_server_id, project)
                     .await
@@ -732,6 +822,10 @@ impl Extension {
         project: Resource<ExtensionProject>,
     ) -> Result<Result<Option<ContextServerConfiguration>, String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_context_server_configuration(store, &context_server_id, project)
+                    .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_context_server_configuration(store, &context_server_id, project)
                     .await
@@ -754,6 +848,7 @@ impl Extension {
         provider: &str,
     ) -> Result<Result<Vec<String>, String>> {
         match self {
+            Extension::V0_6_0(ext) => ext.call_suggest_docs_packages(store, provider).await,
             Extension::V0_5_0(ext) => ext.call_suggest_docs_packages(store, provider).await,
             Extension::V0_4_0(ext) => ext.call_suggest_docs_packages(store, provider).await,
             Extension::V0_3_0(ext) => ext.call_suggest_docs_packages(store, provider).await,
@@ -773,6 +868,10 @@ impl Extension {
         kv_store: Resource<Arc<dyn KeyValueStoreDelegate>>,
     ) -> Result<Result<(), String>> {
         match self {
+            Extension::V0_6_0(ext) => {
+                ext.call_index_docs(store, provider, package_name, kv_store)
+                    .await
+            }
             Extension::V0_5_0(ext) => {
                 ext.call_index_docs(store, provider, package_name, kv_store)
                     .await
@@ -798,6 +897,30 @@ impl Extension {
             }
         }
     }
+    pub async fn call_get_dap_binary(
+        &self,
+        store: &mut Store<WasmState>,
+        adapter_name: Arc<str>,
+        task: DebugTaskDefinition,
+        user_installed_path: Option<PathBuf>,
+    ) -> Result<Result<DebugAdapterBinary, String>> {
+        match self {
+            Extension::V0_6_0(ext) => {
+                let dap_binary = ext
+                    .call_get_dap_binary(
+                        store,
+                        &adapter_name,
+                        &task.try_into()?,
+                        user_installed_path.as_ref().and_then(|p| p.to_str()),
+                    )
+                    .await?
+                    .map_err(|e| anyhow!("{e:?}"))?;
+
+                Ok(Ok(dap_binary))
+            }
+            _ => Err(anyhow!("`get_dap_binary` not available prior to v0.6.0")),
+        }
+    }
 }
 
 trait ToWasmtimeResult<T> {

crates/extension_host/src/wasm_host/wit/since_v0_5_0.rs

@@ -1,28 +1,12 @@
-use crate::wasm_host::wit::since_v0_5_0::slash_command::SlashCommandOutputSection;
-use crate::wasm_host::wit::{CompletionKind, CompletionLabelDetails, InsertTextFormat, SymbolKind};
-use crate::wasm_host::{WasmState, wit::ToWasmtimeResult};
-use ::http_client::{AsyncBody, HttpRequestExt};
-use ::settings::{Settings, WorktreeId};
-use anyhow::{Context, Result, anyhow, bail};
-use async_compression::futures::bufread::GzipDecoder;
-use async_tar::Archive;
-use async_trait::async_trait;
-use extension::{
-    ExtensionLanguageServerProxy, KeyValueStoreDelegate, ProjectDelegate, WorktreeDelegate,
-};
-use futures::{AsyncReadExt, lock::Mutex};
-use futures::{FutureExt as _, io::BufReader};
-use language::{BinaryStatus, LanguageName, language_settings::AllLanguageSettings};
-use project::project_settings::ProjectSettings;
+use crate::wasm_host::WasmState;
+use anyhow::Result;
+use extension::{KeyValueStoreDelegate, ProjectDelegate, WorktreeDelegate};
 use semantic_version::SemanticVersion;
-use std::{
-    env,
-    path::{Path, PathBuf},
-    sync::{Arc, OnceLock},
-};
-use util::maybe;
+use std::sync::{Arc, OnceLock};
 use wasmtime::component::{Linker, Resource};
 
+use super::latest;
+
 pub const MIN_VERSION: SemanticVersion = SemanticVersion::new(0, 5, 0);
 pub const MAX_VERSION: SemanticVersion = SemanticVersion::new(0, 5, 0);
 
@@ -31,15 +15,21 @@ wasmtime::component::bindgen!({
     trappable_imports: true,
     path: "../extension_api/wit/since_v0.5.0",
     with: {
-         "worktree": ExtensionWorktree,
-         "project": ExtensionProject,
-         "key-value-store": ExtensionKeyValueStore,
-         "zed:extension/http-client/http-response-stream": ExtensionHttpResponseStream
+        "worktree": ExtensionWorktree,
+        "project": ExtensionProject,
+        "key-value-store": ExtensionKeyValueStore,
+        "zed:extension/common": latest::zed::extension::common,
+        "zed:extension/github": latest::zed::extension::github,
+        "zed:extension/http-client": latest::zed::extension::http_client,
+        "zed:extension/lsp": latest::zed::extension::lsp,
+        "zed:extension/nodejs": latest::zed::extension::nodejs,
+        "zed:extension/platform": latest::zed::extension::platform,
+        "zed:extension/process": latest::zed::extension::process,
+        "zed:extension/slash-command": latest::zed::extension::slash_command,
+        "zed:extension/context-server": latest::zed::extension::context_server,
     },
 });
 
-pub use self::zed::extension::*;
-
 mod settings {
     include!(concat!(env!("OUT_DIR"), "/since_v0.5.0/settings.rs"));
 }
@@ -47,51 +37,32 @@ mod settings {
 pub type ExtensionWorktree = Arc<dyn WorktreeDelegate>;
 pub type ExtensionProject = Arc<dyn ProjectDelegate>;
 pub type ExtensionKeyValueStore = Arc<dyn KeyValueStoreDelegate>;
-pub type ExtensionHttpResponseStream = Arc<Mutex<::http_client::Response<AsyncBody>>>;
 
 pub fn linker() -> &'static Linker<WasmState> {
     static LINKER: OnceLock<Linker<WasmState>> = OnceLock::new();
     LINKER.get_or_init(|| super::new_linker(Extension::add_to_linker))
 }
 
-impl From<Range> for std::ops::Range<usize> {
-    fn from(range: Range) -> Self {
-        let start = range.start as usize;
-        let end = range.end as usize;
-        start..end
-    }
-}
-
-impl From<Command> for extension::Command {
-    fn from(value: Command) -> Self {
-        Self {
-            command: value.command,
-            args: value.args,
-            env: value.env,
-        }
-    }
-}
-
-impl From<CodeLabel> for extension::CodeLabel {
+impl From<CodeLabel> for latest::CodeLabel {
     fn from(value: CodeLabel) -> Self {
         Self {
             code: value.code,
             spans: value.spans.into_iter().map(Into::into).collect(),
-            filter_range: value.filter_range.into(),
+            filter_range: value.filter_range,
         }
     }
 }
 
-impl From<CodeLabelSpan> for extension::CodeLabelSpan {
+impl From<CodeLabelSpan> for latest::CodeLabelSpan {
     fn from(value: CodeLabelSpan) -> Self {
         match value {
-            CodeLabelSpan::CodeRange(range) => Self::CodeRange(range.into()),
+            CodeLabelSpan::CodeRange(range) => Self::CodeRange(range),
             CodeLabelSpan::Literal(literal) => Self::Literal(literal.into()),
         }
     }
 }
 
-impl From<CodeLabelSpanLiteral> for extension::CodeLabelSpanLiteral {
+impl From<CodeLabelSpanLiteral> for latest::CodeLabelSpanLiteral {
     fn from(value: CodeLabelSpanLiteral) -> Self {
         Self {
             text: value.text,
@@ -100,167 +71,37 @@ impl From<CodeLabelSpanLiteral> for extension::CodeLabelSpanLiteral {
     }
 }
 
-impl From<extension::Completion> for Completion {
-    fn from(value: extension::Completion) -> Self {
+impl From<SettingsLocation> for latest::SettingsLocation {
+    fn from(value: SettingsLocation) -> Self {
         Self {
-            label: value.label,
-            label_details: value.label_details.map(Into::into),
-            detail: value.detail,
-            kind: value.kind.map(Into::into),
-            insert_text_format: value.insert_text_format.map(Into::into),
+            worktree_id: value.worktree_id,
+            path: value.path,
         }
     }
 }
 
-impl From<extension::CompletionLabelDetails> for CompletionLabelDetails {
-    fn from(value: extension::CompletionLabelDetails) -> Self {
-        Self {
-            detail: value.detail,
-            description: value.description,
-        }
-    }
-}
-
-impl From<extension::CompletionKind> for CompletionKind {
-    fn from(value: extension::CompletionKind) -> Self {
+impl From<LanguageServerInstallationStatus> for latest::LanguageServerInstallationStatus {
+    fn from(value: LanguageServerInstallationStatus) -> Self {
         match value {
-            extension::CompletionKind::Text => Self::Text,
-            extension::CompletionKind::Method => Self::Method,
-            extension::CompletionKind::Function => Self::Function,
-            extension::CompletionKind::Constructor => Self::Constructor,
-            extension::CompletionKind::Field => Self::Field,
-            extension::CompletionKind::Variable => Self::Variable,
-            extension::CompletionKind::Class => Self::Class,
-            extension::CompletionKind::Interface => Self::Interface,
-            extension::CompletionKind::Module => Self::Module,
-            extension::CompletionKind::Property => Self::Property,
-            extension::CompletionKind::Unit => Self::Unit,
-            extension::CompletionKind::Value => Self::Value,
-            extension::CompletionKind::Enum => Self::Enum,
-            extension::CompletionKind::Keyword => Self::Keyword,
-            extension::CompletionKind::Snippet => Self::Snippet,
-            extension::CompletionKind::Color => Self::Color,
-            extension::CompletionKind::File => Self::File,
-            extension::CompletionKind::Reference => Self::Reference,
-            extension::CompletionKind::Folder => Self::Folder,
-            extension::CompletionKind::EnumMember => Self::EnumMember,
-            extension::CompletionKind::Constant => Self::Constant,
-            extension::CompletionKind::Struct => Self::Struct,
-            extension::CompletionKind::Event => Self::Event,
-            extension::CompletionKind::Operator => Self::Operator,
-            extension::CompletionKind::TypeParameter => Self::TypeParameter,
-            extension::CompletionKind::Other(value) => Self::Other(value),
+            LanguageServerInstallationStatus::None => Self::None,
+            LanguageServerInstallationStatus::Downloading => Self::Downloading,
+            LanguageServerInstallationStatus::CheckingForUpdate => Self::CheckingForUpdate,
+            LanguageServerInstallationStatus::Failed(message) => Self::Failed(message),
         }
     }
 }
 
-impl From<extension::InsertTextFormat> for InsertTextFormat {
-    fn from(value: extension::InsertTextFormat) -> Self {
+impl From<DownloadedFileType> for latest::DownloadedFileType {
+    fn from(value: DownloadedFileType) -> Self {
         match value {
-            extension::InsertTextFormat::PlainText => Self::PlainText,
-            extension::InsertTextFormat::Snippet => Self::Snippet,
-            extension::InsertTextFormat::Other(value) => Self::Other(value),
+            DownloadedFileType::Gzip => Self::Gzip,
+            DownloadedFileType::GzipTar => Self::GzipTar,
+            DownloadedFileType::Zip => Self::Zip,
+            DownloadedFileType::Uncompressed => Self::Uncompressed,
         }
     }
 }
 
-impl From<extension::Symbol> for Symbol {
-    fn from(value: extension::Symbol) -> Self {
-        Self {
-            kind: value.kind.into(),
-            name: value.name,
-        }
-    }
-}
-
-impl From<extension::SymbolKind> for SymbolKind {
-    fn from(value: extension::SymbolKind) -> Self {
-        match value {
-            extension::SymbolKind::File => Self::File,
-            extension::SymbolKind::Module => Self::Module,
-            extension::SymbolKind::Namespace => Self::Namespace,
-            extension::SymbolKind::Package => Self::Package,
-            extension::SymbolKind::Class => Self::Class,
-            extension::SymbolKind::Method => Self::Method,
-            extension::SymbolKind::Property => Self::Property,
-            extension::SymbolKind::Field => Self::Field,
-            extension::SymbolKind::Constructor => Self::Constructor,
-            extension::SymbolKind::Enum => Self::Enum,
-            extension::SymbolKind::Interface => Self::Interface,
-            extension::SymbolKind::Function => Self::Function,
-            extension::SymbolKind::Variable => Self::Variable,
-            extension::SymbolKind::Constant => Self::Constant,
-            extension::SymbolKind::String => Self::String,
-            extension::SymbolKind::Number => Self::Number,
-            extension::SymbolKind::Boolean => Self::Boolean,
-            extension::SymbolKind::Array => Self::Array,
-            extension::SymbolKind::Object => Self::Object,
-            extension::SymbolKind::Key => Self::Key,
-            extension::SymbolKind::Null => Self::Null,
-            extension::SymbolKind::EnumMember => Self::EnumMember,
-            extension::SymbolKind::Struct => Self::Struct,
-            extension::SymbolKind::Event => Self::Event,
-            extension::SymbolKind::Operator => Self::Operator,
-            extension::SymbolKind::TypeParameter => Self::TypeParameter,
-            extension::SymbolKind::Other(value) => Self::Other(value),
-        }
-    }
-}
-
-impl From<extension::SlashCommand> for SlashCommand {
-    fn from(value: extension::SlashCommand) -> Self {
-        Self {
-            name: value.name,
-            description: value.description,
-            tooltip_text: value.tooltip_text,
-            requires_argument: value.requires_argument,
-        }
-    }
-}
-
-impl From<SlashCommandOutput> for extension::SlashCommandOutput {
-    fn from(value: SlashCommandOutput) -> Self {
-        Self {
-            text: value.text,
-            sections: value.sections.into_iter().map(Into::into).collect(),
-        }
-    }
-}
-
-impl From<SlashCommandOutputSection> for extension::SlashCommandOutputSection {
-    fn from(value: SlashCommandOutputSection) -> Self {
-        Self {
-            range: value.range.start as usize..value.range.end as usize,
-            label: value.label,
-        }
-    }
-}
-
-impl From<SlashCommandArgumentCompletion> for extension::SlashCommandArgumentCompletion {
-    fn from(value: SlashCommandArgumentCompletion) -> Self {
-        Self {
-            label: value.label,
-            new_text: value.new_text,
-            run_command: value.run_command,
-        }
-    }
-}
-
-impl TryFrom<ContextServerConfiguration> for extension::ContextServerConfiguration {
-    type Error = anyhow::Error;
-
-    fn try_from(value: ContextServerConfiguration) -> Result<Self, Self::Error> {
-        let settings_schema: serde_json::Value = serde_json::from_str(&value.settings_schema)
-            .context("Failed to parse settings_schema")?;
-
-        Ok(Self {
-            installation_instructions: value.installation_instructions,
-            default_settings: value.default_settings,
-            settings_schema,
-        })
-    }
-}
-
 impl HostKeyValueStore for WasmState {
     async fn insert(
         &mut self,
@@ -268,8 +109,7 @@ impl HostKeyValueStore for WasmState {
         key: String,
         value: String,
     ) -> wasmtime::Result<Result<(), String>> {
-        let kv_store = self.table.get(&kv_store)?;
-        kv_store.insert(key, value).await.to_wasmtime_result()
+        latest::HostKeyValueStore::insert(self, kv_store, key, value).await
     }
 
     async fn drop(&mut self, _worktree: Resource<ExtensionKeyValueStore>) -> Result<()> {
@@ -283,8 +123,7 @@ impl HostProject for WasmState {
         &mut self,
         project: Resource<ExtensionProject>,
     ) -> wasmtime::Result<Vec<u64>> {
-        let project = self.table.get(&project)?;
-        Ok(project.worktree_ids())
+        latest::HostProject::worktree_ids(self, project).await
     }
 
     async fn drop(&mut self, _project: Resource<Project>) -> Result<()> {
@@ -295,16 +134,14 @@ impl HostProject for WasmState {
 
 impl HostWorktree for WasmState {
     async fn id(&mut self, delegate: Resource<Arc<dyn WorktreeDelegate>>) -> wasmtime::Result<u64> {
-        let delegate = self.table.get(&delegate)?;
-        Ok(delegate.id())
+        latest::HostWorktree::id(self, delegate).await
     }
 
     async fn root_path(
         &mut self,
         delegate: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> wasmtime::Result<String> {
-        let delegate = self.table.get(&delegate)?;
-        Ok(delegate.root_path())
+        latest::HostWorktree::root_path(self, delegate).await
     }
 
     async fn read_text_file(
@@ -312,19 +149,14 @@ impl HostWorktree for WasmState {
         delegate: Resource<Arc<dyn WorktreeDelegate>>,
         path: String,
     ) -> wasmtime::Result<Result<String, String>> {
-        let delegate = self.table.get(&delegate)?;
-        Ok(delegate
-            .read_text_file(path.into())
-            .await
-            .map_err(|error| error.to_string()))
+        latest::HostWorktree::read_text_file(self, delegate, path).await
     }
 
     async fn shell_env(
         &mut self,
         delegate: Resource<Arc<dyn WorktreeDelegate>>,
     ) -> wasmtime::Result<EnvVars> {
-        let delegate = self.table.get(&delegate)?;
-        Ok(delegate.shell_env().await.into_iter().collect())
+        latest::HostWorktree::shell_env(self, delegate).await
     }
 
     async fn which(
@@ -332,8 +164,7 @@ impl HostWorktree for WasmState {
         delegate: Resource<Arc<dyn WorktreeDelegate>>,
         binary_name: String,
     ) -> wasmtime::Result<Option<String>> {
-        let delegate = self.table.get(&delegate)?;
-        Ok(delegate.which(binary_name).await)
+        latest::HostWorktree::which(self, delegate, binary_name).await
     }
 
     async fn drop(&mut self, _worktree: Resource<Worktree>) -> Result<()> {
@@ -342,291 +173,6 @@ impl HostWorktree for WasmState {
     }
 }
 
-impl common::Host for WasmState {}
-
-impl http_client::Host for WasmState {
-    async fn fetch(
-        &mut self,
-        request: http_client::HttpRequest,
-    ) -> wasmtime::Result<Result<http_client::HttpResponse, String>> {
-        maybe!(async {
-            let url = &request.url;
-            let request = convert_request(&request)?;
-            let mut response = self.host.http_client.send(request).await?;
-
-            if response.status().is_client_error() || response.status().is_server_error() {
-                bail!("failed to fetch '{url}': status code {}", response.status())
-            }
-            convert_response(&mut response).await
-        })
-        .await
-        .to_wasmtime_result()
-    }
-
-    async fn fetch_stream(
-        &mut self,
-        request: http_client::HttpRequest,
-    ) -> wasmtime::Result<Result<Resource<ExtensionHttpResponseStream>, String>> {
-        let request = convert_request(&request)?;
-        let response = self.host.http_client.send(request);
-        maybe!(async {
-            let response = response.await?;
-            let stream = Arc::new(Mutex::new(response));
-            let resource = self.table.push(stream)?;
-            Ok(resource)
-        })
-        .await
-        .to_wasmtime_result()
-    }
-}
-
-impl http_client::HostHttpResponseStream for WasmState {
-    async fn next_chunk(
-        &mut self,
-        resource: Resource<ExtensionHttpResponseStream>,
-    ) -> wasmtime::Result<Result<Option<Vec<u8>>, String>> {
-        let stream = self.table.get(&resource)?.clone();
-        maybe!(async move {
-            let mut response = stream.lock().await;
-            let mut buffer = vec![0; 8192]; // 8KB buffer
-            let bytes_read = response.body_mut().read(&mut buffer).await?;
-            if bytes_read == 0 {
-                Ok(None)
-            } else {
-                buffer.truncate(bytes_read);
-                Ok(Some(buffer))
-            }
-        })
-        .await
-        .to_wasmtime_result()
-    }
-
-    async fn drop(&mut self, _resource: Resource<ExtensionHttpResponseStream>) -> Result<()> {
-        Ok(())
-    }
-}
-
-impl From<http_client::HttpMethod> for ::http_client::Method {
-    fn from(value: http_client::HttpMethod) -> Self {
-        match value {
-            http_client::HttpMethod::Get => Self::GET,
-            http_client::HttpMethod::Post => Self::POST,
-            http_client::HttpMethod::Put => Self::PUT,
-            http_client::HttpMethod::Delete => Self::DELETE,
-            http_client::HttpMethod::Head => Self::HEAD,
-            http_client::HttpMethod::Options => Self::OPTIONS,
-            http_client::HttpMethod::Patch => Self::PATCH,
-        }
-    }
-}
-
-fn convert_request(
-    extension_request: &http_client::HttpRequest,
-) -> Result<::http_client::Request<AsyncBody>, anyhow::Error> {
-    let mut request = ::http_client::Request::builder()
-        .method(::http_client::Method::from(extension_request.method))
-        .uri(&extension_request.url)
-        .follow_redirects(match extension_request.redirect_policy {
-            http_client::RedirectPolicy::NoFollow => ::http_client::RedirectPolicy::NoFollow,
-            http_client::RedirectPolicy::FollowLimit(limit) => {
-                ::http_client::RedirectPolicy::FollowLimit(limit)
-            }
-            http_client::RedirectPolicy::FollowAll => ::http_client::RedirectPolicy::FollowAll,
-        });
-    for (key, value) in &extension_request.headers {
-        request = request.header(key, value);
-    }
-    let body = extension_request
-        .body
-        .clone()
-        .map(AsyncBody::from)
-        .unwrap_or_default();
-    request.body(body).map_err(anyhow::Error::from)
-}
-
-async fn convert_response(
-    response: &mut ::http_client::Response<AsyncBody>,
-) -> Result<http_client::HttpResponse, anyhow::Error> {
-    let mut extension_response = http_client::HttpResponse {
-        body: Vec::new(),
-        headers: Vec::new(),
-    };
-
-    for (key, value) in response.headers() {
-        extension_response
-            .headers
-            .push((key.to_string(), value.to_str().unwrap_or("").to_string()));
-    }
-
-    response
-        .body_mut()
-        .read_to_end(&mut extension_response.body)
-        .await?;
-
-    Ok(extension_response)
-}
-
-impl nodejs::Host for WasmState {
-    async fn node_binary_path(&mut self) -> wasmtime::Result<Result<String, String>> {
-        self.host
-            .node_runtime
-            .binary_path()
-            .await
-            .map(|path| path.to_string_lossy().to_string())
-            .to_wasmtime_result()
-    }
-
-    async fn npm_package_latest_version(
-        &mut self,
-        package_name: String,
-    ) -> wasmtime::Result<Result<String, String>> {
-        self.host
-            .node_runtime
-            .npm_package_latest_version(&package_name)
-            .await
-            .to_wasmtime_result()
-    }
-
-    async fn npm_package_installed_version(
-        &mut self,
-        package_name: String,
-    ) -> wasmtime::Result<Result<Option<String>, String>> {
-        self.host
-            .node_runtime
-            .npm_package_installed_version(&self.work_dir(), &package_name)
-            .await
-            .to_wasmtime_result()
-    }
-
-    async fn npm_install_package(
-        &mut self,
-        package_name: String,
-        version: String,
-    ) -> wasmtime::Result<Result<(), String>> {
-        self.host
-            .node_runtime
-            .npm_install_packages(&self.work_dir(), &[(&package_name, &version)])
-            .await
-            .to_wasmtime_result()
-    }
-}
-
-#[async_trait]
-impl lsp::Host for WasmState {}
-
-impl From<::http_client::github::GithubRelease> for github::GithubRelease {
-    fn from(value: ::http_client::github::GithubRelease) -> Self {
-        Self {
-            version: value.tag_name,
-            assets: value.assets.into_iter().map(Into::into).collect(),
-        }
-    }
-}
-
-impl From<::http_client::github::GithubReleaseAsset> for github::GithubReleaseAsset {
-    fn from(value: ::http_client::github::GithubReleaseAsset) -> Self {
-        Self {
-            name: value.name,
-            download_url: value.browser_download_url,
-        }
-    }
-}
-
-impl github::Host for WasmState {
-    async fn latest_github_release(
-        &mut self,
-        repo: String,
-        options: github::GithubReleaseOptions,
-    ) -> wasmtime::Result<Result<github::GithubRelease, String>> {
-        maybe!(async {
-            let release = ::http_client::github::latest_github_release(
-                &repo,
-                options.require_assets,
-                options.pre_release,
-                self.host.http_client.clone(),
-            )
-            .await?;
-            Ok(release.into())
-        })
-        .await
-        .to_wasmtime_result()
-    }
-
-    async fn github_release_by_tag_name(
-        &mut self,
-        repo: String,
-        tag: String,
-    ) -> wasmtime::Result<Result<github::GithubRelease, String>> {
-        maybe!(async {
-            let release = ::http_client::github::get_release_by_tag_name(
-                &repo,
-                &tag,
-                self.host.http_client.clone(),
-            )
-            .await?;
-            Ok(release.into())
-        })
-        .await
-        .to_wasmtime_result()
-    }
-}
-
-impl platform::Host for WasmState {
-    async fn current_platform(&mut self) -> Result<(platform::Os, platform::Architecture)> {
-        Ok((
-            match env::consts::OS {
-                "macos" => platform::Os::Mac,
-                "linux" => platform::Os::Linux,
-                "windows" => platform::Os::Windows,
-                _ => panic!("unsupported os"),
-            },
-            match env::consts::ARCH {
-                "aarch64" => platform::Architecture::Aarch64,
-                "x86" => platform::Architecture::X86,
-                "x86_64" => platform::Architecture::X8664,
-                _ => panic!("unsupported architecture"),
-            },
-        ))
-    }
-}
-
-impl From<std::process::Output> for process::Output {
-    fn from(output: std::process::Output) -> Self {
-        Self {
-            status: output.status.code(),
-            stdout: output.stdout,
-            stderr: output.stderr,
-        }
-    }
-}
-
-impl process::Host for WasmState {
-    async fn run_command(
-        &mut self,
-        command: process::Command,
-    ) -> wasmtime::Result<Result<process::Output, String>> {
-        maybe!(async {
-            self.manifest.allow_exec(&command.command, &command.args)?;
-
-            let output = util::command::new_smol_command(command.command.as_str())
-                .args(&command.args)
-                .envs(command.env)
-                .output()
-                .await?;
-
-            Ok(output.into())
-        })
-        .await
-        .to_wasmtime_result()
-    }
-}
-
-#[async_trait]
-impl slash_command::Host for WasmState {}
-
-#[async_trait]
-impl context_server::Host for WasmState {}
-
 impl ExtensionImports for WasmState {
     async fn get_settings(
         &mut self,
@@ -634,75 +180,13 @@ impl ExtensionImports for WasmState {
         category: String,
         key: Option<String>,
     ) -> wasmtime::Result<Result<String, String>> {
-        self.on_main_thread(|cx| {
-            async move {
-                let location = location
-                    .as_ref()
-                    .map(|location| ::settings::SettingsLocation {
-                        worktree_id: WorktreeId::from_proto(location.worktree_id),
-                        path: Path::new(&location.path),
-                    });
-
-                cx.update(|cx| match category.as_str() {
-                    "language" => {
-                        let key = key.map(|k| LanguageName::new(&k));
-                        let settings = AllLanguageSettings::get(location, cx).language(
-                            location,
-                            key.as_ref(),
-                            cx,
-                        );
-                        Ok(serde_json::to_string(&settings::LanguageSettings {
-                            tab_size: settings.tab_size,
-                        })?)
-                    }
-                    "lsp" => {
-                        let settings = key
-                            .and_then(|key| {
-                                ProjectSettings::get(location, cx)
-                                    .lsp
-                                    .get(&::lsp::LanguageServerName::from_proto(key))
-                            })
-                            .cloned()
-                            .unwrap_or_default();
-                        Ok(serde_json::to_string(&settings::LspSettings {
-                            binary: settings.binary.map(|binary| settings::CommandSettings {
-                                path: binary.path,
-                                arguments: binary.arguments,
-                                env: binary.env,
-                            }),
-                            settings: settings.settings,
-                            initialization_options: settings.initialization_options,
-                        })?)
-                    }
-                    "context_servers" => {
-                        let configuration = key
-                            .and_then(|key| {
-                                ProjectSettings::get(location, cx)
-                                    .context_servers
-                                    .get(key.as_str())
-                            })
-                            .cloned()
-                            .unwrap_or_default();
-                        Ok(serde_json::to_string(&settings::ContextServerSettings {
-                            command: configuration.command.map(|command| {
-                                settings::CommandSettings {
-                                    path: Some(command.path),
-                                    arguments: Some(command.args),
-                                    env: command.env.map(|env| env.into_iter().collect()),
-                                }
-                            }),
-                            settings: configuration.settings,
-                        })?)
-                    }
-                    _ => {
-                        bail!("Unknown settings category: {}", category);
-                    }
-                })
-            }
-            .boxed_local()
-        })
-        .await?
-        .to_wasmtime_result()
+        latest::ExtensionImports::get_settings(
+            self,
+            location.map(|location| location.into()),
+            category,
+            key,
+        )
+        .await
     }
 
     async fn set_language_server_installation_status(
@@ -710,18 +194,12 @@ impl ExtensionImports for WasmState {
         server_name: String,
         status: LanguageServerInstallationStatus,
     ) -> wasmtime::Result<()> {
-        let status = match status {
-            LanguageServerInstallationStatus::CheckingForUpdate => BinaryStatus::CheckingForUpdate,
-            LanguageServerInstallationStatus::Downloading => BinaryStatus::Downloading,
-            LanguageServerInstallationStatus::None => BinaryStatus::None,
-            LanguageServerInstallationStatus::Failed(error) => BinaryStatus::Failed { error },
-        };
-
-        self.host
-            .proxy
-            .update_language_server_status(::lsp::LanguageServerName(server_name.into()), status);
-
-        Ok(())
+        latest::ExtensionImports::set_language_server_installation_status(
+            self,
+            server_name,
+            status.into(),
+        )
+        .await
     }
 
     async fn download_file(
@@ -730,86 +208,10 @@ impl ExtensionImports for WasmState {
         path: String,
         file_type: DownloadedFileType,
     ) -> wasmtime::Result<Result<(), String>> {
-        maybe!(async {
-            let path = PathBuf::from(path);
-            let extension_work_dir = self.host.work_dir.join(self.manifest.id.as_ref());
-
-            self.host.fs.create_dir(&extension_work_dir).await?;
-
-            let destination_path = self
-                .host
-                .writeable_path_from_extension(&self.manifest.id, &path)?;
-
-            let mut response = self
-                .host
-                .http_client
-                .get(&url, Default::default(), true)
-                .await
-                .map_err(|err| anyhow!("error downloading release: {}", err))?;
-
-            if !response.status().is_success() {
-                Err(anyhow!(
-                    "download failed with status {}",
-                    response.status().to_string()
-                ))?;
-            }
-            let body = BufReader::new(response.body_mut());
-
-            match file_type {
-                DownloadedFileType::Uncompressed => {
-                    futures::pin_mut!(body);
-                    self.host
-                        .fs
-                        .create_file_with(&destination_path, body)
-                        .await?;
-                }
-                DownloadedFileType::Gzip => {
-                    let body = GzipDecoder::new(body);
-                    futures::pin_mut!(body);
-                    self.host
-                        .fs
-                        .create_file_with(&destination_path, body)
-                        .await?;
-                }
-                DownloadedFileType::GzipTar => {
-                    let body = GzipDecoder::new(body);
-                    futures::pin_mut!(body);
-                    self.host
-                        .fs
-                        .extract_tar_file(&destination_path, Archive::new(body))
-                        .await?;
-                }
-                DownloadedFileType::Zip => {
-                    futures::pin_mut!(body);
-                    node_runtime::extract_zip(&destination_path, body)
-                        .await
-                        .with_context(|| format!("failed to unzip {} archive", path.display()))?;
-                }
-            }
-
-            Ok(())
-        })
-        .await
-        .to_wasmtime_result()
+        latest::ExtensionImports::download_file(self, url, path, file_type.into()).await
     }
 
     async fn make_file_executable(&mut self, path: String) -> wasmtime::Result<Result<(), String>> {
-        #[allow(unused)]
-        let path = self
-            .host
-            .writeable_path_from_extension(&self.manifest.id, Path::new(&path))?;
-
-        #[cfg(unix)]
-        {
-            use std::fs::{self, Permissions};
-            use std::os::unix::fs::PermissionsExt;
-
-            return fs::set_permissions(&path, Permissions::from_mode(0o755))
-                .map_err(|error| anyhow!("failed to set permissions for path {path:?}: {error}"))
-                .to_wasmtime_result();
-        }
-
-        #[cfg(not(unix))]
-        Ok(Ok(()))
+        latest::ExtensionImports::make_file_executable(self, path).await
     }
 }

crates/extension_host/src/wasm_host/wit/since_v0_6_0.rs

@@ -0,0 +1,920 @@
+use crate::wasm_host::wit::since_v0_6_0::{
+    dap::{
+        AttachRequest, DebugRequest, LaunchRequest, StartDebuggingRequestArguments,
+        StartDebuggingRequestArgumentsRequest, TcpArguments, TcpArgumentsTemplate,
+    },
+    slash_command::SlashCommandOutputSection,
+};
+use crate::wasm_host::wit::{CompletionKind, CompletionLabelDetails, InsertTextFormat, SymbolKind};
+use crate::wasm_host::{WasmState, wit::ToWasmtimeResult};
+use ::http_client::{AsyncBody, HttpRequestExt};
+use ::settings::{Settings, WorktreeId};
+use anyhow::{Context, Result, anyhow, bail};
+use async_compression::futures::bufread::GzipDecoder;
+use async_tar::Archive;
+use async_trait::async_trait;
+use extension::{
+    ExtensionLanguageServerProxy, KeyValueStoreDelegate, ProjectDelegate, WorktreeDelegate,
+};
+use futures::{AsyncReadExt, lock::Mutex};
+use futures::{FutureExt as _, io::BufReader};
+use language::{BinaryStatus, LanguageName, language_settings::AllLanguageSettings};
+use project::project_settings::ProjectSettings;
+use semantic_version::SemanticVersion;
+use std::{
+    env,
+    net::Ipv4Addr,
+    path::{Path, PathBuf},
+    sync::{Arc, OnceLock},
+};
+use util::maybe;
+use wasmtime::component::{Linker, Resource};
+
+pub const MIN_VERSION: SemanticVersion = SemanticVersion::new(0, 6, 0);
+pub const MAX_VERSION: SemanticVersion = SemanticVersion::new(0, 6, 0);
+
+wasmtime::component::bindgen!({
+    async: true,
+    trappable_imports: true,
+    path: "../extension_api/wit/since_v0.6.0",
+    with: {
+         "worktree": ExtensionWorktree,
+         "project": ExtensionProject,
+         "key-value-store": ExtensionKeyValueStore,
+         "zed:extension/http-client/http-response-stream": ExtensionHttpResponseStream
+    },
+});
+
+pub use self::zed::extension::*;
+
+mod settings {
+    include!(concat!(env!("OUT_DIR"), "/since_v0.5.0/settings.rs"));
+}
+
+pub type ExtensionWorktree = Arc<dyn WorktreeDelegate>;
+pub type ExtensionProject = Arc<dyn ProjectDelegate>;
+pub type ExtensionKeyValueStore = Arc<dyn KeyValueStoreDelegate>;
+pub type ExtensionHttpResponseStream = Arc<Mutex<::http_client::Response<AsyncBody>>>;
+
+pub fn linker() -> &'static Linker<WasmState> {
+    static LINKER: OnceLock<Linker<WasmState>> = OnceLock::new();
+    LINKER.get_or_init(|| super::new_linker(Extension::add_to_linker))
+}
+
+impl From<Range> for std::ops::Range<usize> {
+    fn from(range: Range) -> Self {
+        let start = range.start as usize;
+        let end = range.end as usize;
+        start..end
+    }
+}
+
+impl From<Command> for extension::Command {
+    fn from(value: Command) -> Self {
+        Self {
+            command: value.command,
+            args: value.args,
+            env: value.env,
+        }
+    }
+}
+
+impl From<extension::LaunchRequest> for LaunchRequest {
+    fn from(value: extension::LaunchRequest) -> Self {
+        Self {
+            program: value.program,
+            cwd: value.cwd.map(|path| path.to_string_lossy().into_owned()),
+            envs: value.env.into_iter().collect(),
+            args: value.args,
+        }
+    }
+}
+
+impl From<StartDebuggingRequestArgumentsRequest>
+    for extension::StartDebuggingRequestArgumentsRequest
+{
+    fn from(value: StartDebuggingRequestArgumentsRequest) -> Self {
+        match value {
+            StartDebuggingRequestArgumentsRequest::Launch => Self::Launch,
+            StartDebuggingRequestArgumentsRequest::Attach => Self::Attach,
+        }
+    }
+}
+impl TryFrom<StartDebuggingRequestArguments> for extension::StartDebuggingRequestArguments {
+    type Error = anyhow::Error;
+
+    fn try_from(value: StartDebuggingRequestArguments) -> Result<Self, Self::Error> {
+        Ok(Self {
+            configuration: serde_json::from_str(&value.configuration)?,
+            request: value.request.into(),
+        })
+    }
+}
+impl From<TcpArguments> for extension::TcpArguments {
+    fn from(value: TcpArguments) -> Self {
+        Self {
+            host: value.host.into(),
+            port: value.port,
+            timeout: value.timeout,
+        }
+    }
+}
+
+impl From<extension::TcpArgumentsTemplate> for TcpArgumentsTemplate {
+    fn from(value: extension::TcpArgumentsTemplate) -> Self {
+        Self {
+            host: value.host.map(Ipv4Addr::to_bits),
+            port: value.port,
+            timeout: value.timeout,
+        }
+    }
+}
+impl From<extension::AttachRequest> for AttachRequest {
+    fn from(value: extension::AttachRequest) -> Self {
+        Self {
+            process_id: value.process_id,
+        }
+    }
+}
+impl From<extension::DebugRequest> for DebugRequest {
+    fn from(value: extension::DebugRequest) -> Self {
+        match value {
+            extension::DebugRequest::Launch(launch_request) => Self::Launch(launch_request.into()),
+            extension::DebugRequest::Attach(attach_request) => Self::Attach(attach_request.into()),
+        }
+    }
+}
+
+impl TryFrom<extension::DebugTaskDefinition> for DebugTaskDefinition {
+    type Error = anyhow::Error;
+    fn try_from(value: extension::DebugTaskDefinition) -> Result<Self, Self::Error> {
+        let initialize_args = value.initialize_args.map(|s| s.to_string());
+        Ok(Self {
+            label: value.label.to_string(),
+            adapter: value.adapter.to_string(),
+            request: value.request.into(),
+            initialize_args,
+            stop_on_entry: value.stop_on_entry,
+            tcp_connection: value.tcp_connection.map(Into::into),
+        })
+    }
+}
+
+impl TryFrom<DebugAdapterBinary> for extension::DebugAdapterBinary {
+    type Error = anyhow::Error;
+    fn try_from(value: DebugAdapterBinary) -> Result<Self, Self::Error> {
+        Ok(Self {
+            command: value.command,
+            arguments: value.arguments,
+            envs: value.envs.into_iter().collect(),
+            cwd: value.cwd.map(|s| s.into()),
+            connection: value.connection.map(Into::into),
+            request_args: value.request_args.try_into()?,
+        })
+    }
+}
+
+impl From<CodeLabel> for extension::CodeLabel {
+    fn from(value: CodeLabel) -> Self {
+        Self {
+            code: value.code,
+            spans: value.spans.into_iter().map(Into::into).collect(),
+            filter_range: value.filter_range.into(),
+        }
+    }
+}
+
+impl From<CodeLabelSpan> for extension::CodeLabelSpan {
+    fn from(value: CodeLabelSpan) -> Self {
+        match value {
+            CodeLabelSpan::CodeRange(range) => Self::CodeRange(range.into()),
+            CodeLabelSpan::Literal(literal) => Self::Literal(literal.into()),
+        }
+    }
+}
+
+impl From<CodeLabelSpanLiteral> for extension::CodeLabelSpanLiteral {
+    fn from(value: CodeLabelSpanLiteral) -> Self {
+        Self {
+            text: value.text,
+            highlight_name: value.highlight_name,
+        }
+    }
+}
+
+impl From<extension::Completion> for Completion {
+    fn from(value: extension::Completion) -> Self {
+        Self {
+            label: value.label,
+            label_details: value.label_details.map(Into::into),
+            detail: value.detail,
+            kind: value.kind.map(Into::into),
+            insert_text_format: value.insert_text_format.map(Into::into),
+        }
+    }
+}
+
+impl From<extension::CompletionLabelDetails> for CompletionLabelDetails {
+    fn from(value: extension::CompletionLabelDetails) -> Self {
+        Self {
+            detail: value.detail,
+            description: value.description,
+        }
+    }
+}
+
+impl From<extension::CompletionKind> for CompletionKind {
+    fn from(value: extension::CompletionKind) -> Self {
+        match value {
+            extension::CompletionKind::Text => Self::Text,
+            extension::CompletionKind::Method => Self::Method,
+            extension::CompletionKind::Function => Self::Function,
+            extension::CompletionKind::Constructor => Self::Constructor,
+            extension::CompletionKind::Field => Self::Field,
+            extension::CompletionKind::Variable => Self::Variable,
+            extension::CompletionKind::Class => Self::Class,
+            extension::CompletionKind::Interface => Self::Interface,
+            extension::CompletionKind::Module => Self::Module,
+            extension::CompletionKind::Property => Self::Property,
+            extension::CompletionKind::Unit => Self::Unit,
+            extension::CompletionKind::Value => Self::Value,
+            extension::CompletionKind::Enum => Self::Enum,
+            extension::CompletionKind::Keyword => Self::Keyword,
+            extension::CompletionKind::Snippet => Self::Snippet,
+            extension::CompletionKind::Color => Self::Color,
+            extension::CompletionKind::File => Self::File,
+            extension::CompletionKind::Reference => Self::Reference,
+            extension::CompletionKind::Folder => Self::Folder,
+            extension::CompletionKind::EnumMember => Self::EnumMember,
+            extension::CompletionKind::Constant => Self::Constant,
+            extension::CompletionKind::Struct => Self::Struct,
+            extension::CompletionKind::Event => Self::Event,
+            extension::CompletionKind::Operator => Self::Operator,
+            extension::CompletionKind::TypeParameter => Self::TypeParameter,
+            extension::CompletionKind::Other(value) => Self::Other(value),
+        }
+    }
+}
+
+impl From<extension::InsertTextFormat> for InsertTextFormat {
+    fn from(value: extension::InsertTextFormat) -> Self {
+        match value {
+            extension::InsertTextFormat::PlainText => Self::PlainText,
+            extension::InsertTextFormat::Snippet => Self::Snippet,
+            extension::InsertTextFormat::Other(value) => Self::Other(value),
+        }
+    }
+}
+
+impl From<extension::Symbol> for Symbol {
+    fn from(value: extension::Symbol) -> Self {
+        Self {
+            kind: value.kind.into(),
+            name: value.name,
+        }
+    }
+}
+
+impl From<extension::SymbolKind> for SymbolKind {
+    fn from(value: extension::SymbolKind) -> Self {
+        match value {
+            extension::SymbolKind::File => Self::File,
+            extension::SymbolKind::Module => Self::Module,
+            extension::SymbolKind::Namespace => Self::Namespace,
+            extension::SymbolKind::Package => Self::Package,
+            extension::SymbolKind::Class => Self::Class,
+            extension::SymbolKind::Method => Self::Method,
+            extension::SymbolKind::Property => Self::Property,
+            extension::SymbolKind::Field => Self::Field,
+            extension::SymbolKind::Constructor => Self::Constructor,
+            extension::SymbolKind::Enum => Self::Enum,
+            extension::SymbolKind::Interface => Self::Interface,
+            extension::SymbolKind::Function => Self::Function,
+            extension::SymbolKind::Variable => Self::Variable,
+            extension::SymbolKind::Constant => Self::Constant,
+            extension::SymbolKind::String => Self::String,
+            extension::SymbolKind::Number => Self::Number,
+            extension::SymbolKind::Boolean => Self::Boolean,
+            extension::SymbolKind::Array => Self::Array,
+            extension::SymbolKind::Object => Self::Object,
+            extension::SymbolKind::Key => Self::Key,
+            extension::SymbolKind::Null => Self::Null,
+            extension::SymbolKind::EnumMember => Self::EnumMember,
+            extension::SymbolKind::Struct => Self::Struct,
+            extension::SymbolKind::Event => Self::Event,
+            extension::SymbolKind::Operator => Self::Operator,
+            extension::SymbolKind::TypeParameter => Self::TypeParameter,
+            extension::SymbolKind::Other(value) => Self::Other(value),
+        }
+    }
+}
+
+impl From<extension::SlashCommand> for SlashCommand {
+    fn from(value: extension::SlashCommand) -> Self {
+        Self {
+            name: value.name,
+            description: value.description,
+            tooltip_text: value.tooltip_text,
+            requires_argument: value.requires_argument,
+        }
+    }
+}
+
+impl From<SlashCommandOutput> for extension::SlashCommandOutput {
+    fn from(value: SlashCommandOutput) -> Self {
+        Self {
+            text: value.text,
+            sections: value.sections.into_iter().map(Into::into).collect(),
+        }
+    }
+}
+
+impl From<SlashCommandOutputSection> for extension::SlashCommandOutputSection {
+    fn from(value: SlashCommandOutputSection) -> Self {
+        Self {
+            range: value.range.start as usize..value.range.end as usize,
+            label: value.label,
+        }
+    }
+}
+
+impl From<SlashCommandArgumentCompletion> for extension::SlashCommandArgumentCompletion {
+    fn from(value: SlashCommandArgumentCompletion) -> Self {
+        Self {
+            label: value.label,
+            new_text: value.new_text,
+            run_command: value.run_command,
+        }
+    }
+}
+
+impl TryFrom<ContextServerConfiguration> for extension::ContextServerConfiguration {
+    type Error = anyhow::Error;
+
+    fn try_from(value: ContextServerConfiguration) -> Result<Self, Self::Error> {
+        let settings_schema: serde_json::Value = serde_json::from_str(&value.settings_schema)
+            .context("Failed to parse settings_schema")?;
+
+        Ok(Self {
+            installation_instructions: value.installation_instructions,
+            default_settings: value.default_settings,
+            settings_schema,
+        })
+    }
+}
+
+impl HostKeyValueStore for WasmState {
+    async fn insert(
+        &mut self,
+        kv_store: Resource<ExtensionKeyValueStore>,
+        key: String,
+        value: String,
+    ) -> wasmtime::Result<Result<(), String>> {
+        let kv_store = self.table.get(&kv_store)?;
+        kv_store.insert(key, value).await.to_wasmtime_result()
+    }
+
+    async fn drop(&mut self, _worktree: Resource<ExtensionKeyValueStore>) -> Result<()> {
+        // We only ever hand out borrows of key-value stores.
+        Ok(())
+    }
+}
+
+impl HostProject for WasmState {
+    async fn worktree_ids(
+        &mut self,
+        project: Resource<ExtensionProject>,
+    ) -> wasmtime::Result<Vec<u64>> {
+        let project = self.table.get(&project)?;
+        Ok(project.worktree_ids())
+    }
+
+    async fn drop(&mut self, _project: Resource<Project>) -> Result<()> {
+        // We only ever hand out borrows of projects.
+        Ok(())
+    }
+}
+
+impl HostWorktree for WasmState {
+    async fn id(&mut self, delegate: Resource<Arc<dyn WorktreeDelegate>>) -> wasmtime::Result<u64> {
+        let delegate = self.table.get(&delegate)?;
+        Ok(delegate.id())
+    }
+
+    async fn root_path(
+        &mut self,
+        delegate: Resource<Arc<dyn WorktreeDelegate>>,
+    ) -> wasmtime::Result<String> {
+        let delegate = self.table.get(&delegate)?;
+        Ok(delegate.root_path())
+    }
+
+    async fn read_text_file(
+        &mut self,
+        delegate: Resource<Arc<dyn WorktreeDelegate>>,
+        path: String,
+    ) -> wasmtime::Result<Result<String, String>> {
+        let delegate = self.table.get(&delegate)?;
+        Ok(delegate
+            .read_text_file(path.into())
+            .await
+            .map_err(|error| error.to_string()))
+    }
+
+    async fn shell_env(
+        &mut self,
+        delegate: Resource<Arc<dyn WorktreeDelegate>>,
+    ) -> wasmtime::Result<EnvVars> {
+        let delegate = self.table.get(&delegate)?;
+        Ok(delegate.shell_env().await.into_iter().collect())
+    }
+
+    async fn which(
+        &mut self,
+        delegate: Resource<Arc<dyn WorktreeDelegate>>,
+        binary_name: String,
+    ) -> wasmtime::Result<Option<String>> {
+        let delegate = self.table.get(&delegate)?;
+        Ok(delegate.which(binary_name).await)
+    }
+
+    async fn drop(&mut self, _worktree: Resource<Worktree>) -> Result<()> {
+        // We only ever hand out borrows of worktrees.
+        Ok(())
+    }
+}
+
+impl common::Host for WasmState {}
+
+impl http_client::Host for WasmState {
+    async fn fetch(
+        &mut self,
+        request: http_client::HttpRequest,
+    ) -> wasmtime::Result<Result<http_client::HttpResponse, String>> {
+        maybe!(async {
+            let url = &request.url;
+            let request = convert_request(&request)?;
+            let mut response = self.host.http_client.send(request).await?;
+
+            if response.status().is_client_error() || response.status().is_server_error() {
+                bail!("failed to fetch '{url}': status code {}", response.status())
+            }
+            convert_response(&mut response).await
+        })
+        .await
+        .to_wasmtime_result()
+    }
+
+    async fn fetch_stream(
+        &mut self,
+        request: http_client::HttpRequest,
+    ) -> wasmtime::Result<Result<Resource<ExtensionHttpResponseStream>, String>> {
+        let request = convert_request(&request)?;
+        let response = self.host.http_client.send(request);
+        maybe!(async {
+            let response = response.await?;
+            let stream = Arc::new(Mutex::new(response));
+            let resource = self.table.push(stream)?;
+            Ok(resource)
+        })
+        .await
+        .to_wasmtime_result()
+    }
+}
+
+impl http_client::HostHttpResponseStream for WasmState {
+    async fn next_chunk(
+        &mut self,
+        resource: Resource<ExtensionHttpResponseStream>,
+    ) -> wasmtime::Result<Result<Option<Vec<u8>>, String>> {
+        let stream = self.table.get(&resource)?.clone();
+        maybe!(async move {
+            let mut response = stream.lock().await;
+            let mut buffer = vec![0; 8192]; // 8KB buffer
+            let bytes_read = response.body_mut().read(&mut buffer).await?;
+            if bytes_read == 0 {
+                Ok(None)
+            } else {
+                buffer.truncate(bytes_read);
+                Ok(Some(buffer))
+            }
+        })
+        .await
+        .to_wasmtime_result()
+    }
+
+    async fn drop(&mut self, _resource: Resource<ExtensionHttpResponseStream>) -> Result<()> {
+        Ok(())
+    }
+}
+
+impl From<http_client::HttpMethod> for ::http_client::Method {
+    fn from(value: http_client::HttpMethod) -> Self {
+        match value {
+            http_client::HttpMethod::Get => Self::GET,
+            http_client::HttpMethod::Post => Self::POST,
+            http_client::HttpMethod::Put => Self::PUT,
+            http_client::HttpMethod::Delete => Self::DELETE,
+            http_client::HttpMethod::Head => Self::HEAD,
+            http_client::HttpMethod::Options => Self::OPTIONS,
+            http_client::HttpMethod::Patch => Self::PATCH,
+        }
+    }
+}
+
+fn convert_request(
+    extension_request: &http_client::HttpRequest,
+) -> Result<::http_client::Request<AsyncBody>, anyhow::Error> {
+    let mut request = ::http_client::Request::builder()
+        .method(::http_client::Method::from(extension_request.method))
+        .uri(&extension_request.url)
+        .follow_redirects(match extension_request.redirect_policy {
+            http_client::RedirectPolicy::NoFollow => ::http_client::RedirectPolicy::NoFollow,
+            http_client::RedirectPolicy::FollowLimit(limit) => {
+                ::http_client::RedirectPolicy::FollowLimit(limit)
+            }
+            http_client::RedirectPolicy::FollowAll => ::http_client::RedirectPolicy::FollowAll,
+        });
+    for (key, value) in &extension_request.headers {
+        request = request.header(key, value);
+    }
+    let body = extension_request
+        .body
+        .clone()
+        .map(AsyncBody::from)
+        .unwrap_or_default();
+    request.body(body).map_err(anyhow::Error::from)
+}
+
+async fn convert_response(
+    response: &mut ::http_client::Response<AsyncBody>,
+) -> Result<http_client::HttpResponse, anyhow::Error> {
+    let mut extension_response = http_client::HttpResponse {
+        body: Vec::new(),
+        headers: Vec::new(),
+    };
+
+    for (key, value) in response.headers() {
+        extension_response
+            .headers
+            .push((key.to_string(), value.to_str().unwrap_or("").to_string()));
+    }
+
+    response
+        .body_mut()
+        .read_to_end(&mut extension_response.body)
+        .await?;
+
+    Ok(extension_response)
+}
+
+impl nodejs::Host for WasmState {
+    async fn node_binary_path(&mut self) -> wasmtime::Result<Result<String, String>> {
+        self.host
+            .node_runtime
+            .binary_path()
+            .await
+            .map(|path| path.to_string_lossy().to_string())
+            .to_wasmtime_result()
+    }
+
+    async fn npm_package_latest_version(
+        &mut self,
+        package_name: String,
+    ) -> wasmtime::Result<Result<String, String>> {
+        self.host
+            .node_runtime
+            .npm_package_latest_version(&package_name)
+            .await
+            .to_wasmtime_result()
+    }
+
+    async fn npm_package_installed_version(
+        &mut self,
+        package_name: String,
+    ) -> wasmtime::Result<Result<Option<String>, String>> {
+        self.host
+            .node_runtime
+            .npm_package_installed_version(&self.work_dir(), &package_name)
+            .await
+            .to_wasmtime_result()
+    }
+
+    async fn npm_install_package(
+        &mut self,
+        package_name: String,
+        version: String,
+    ) -> wasmtime::Result<Result<(), String>> {
+        self.host
+            .node_runtime
+            .npm_install_packages(&self.work_dir(), &[(&package_name, &version)])
+            .await
+            .to_wasmtime_result()
+    }
+}
+
+#[async_trait]
+impl lsp::Host for WasmState {}
+
+impl From<::http_client::github::GithubRelease> for github::GithubRelease {
+    fn from(value: ::http_client::github::GithubRelease) -> Self {
+        Self {
+            version: value.tag_name,
+            assets: value.assets.into_iter().map(Into::into).collect(),
+        }
+    }
+}
+
+impl From<::http_client::github::GithubReleaseAsset> for github::GithubReleaseAsset {
+    fn from(value: ::http_client::github::GithubReleaseAsset) -> Self {
+        Self {
+            name: value.name,
+            download_url: value.browser_download_url,
+        }
+    }
+}
+
+impl github::Host for WasmState {
+    async fn latest_github_release(
+        &mut self,
+        repo: String,
+        options: github::GithubReleaseOptions,
+    ) -> wasmtime::Result<Result<github::GithubRelease, String>> {
+        maybe!(async {
+            let release = ::http_client::github::latest_github_release(
+                &repo,
+                options.require_assets,
+                options.pre_release,
+                self.host.http_client.clone(),
+            )
+            .await?;
+            Ok(release.into())
+        })
+        .await
+        .to_wasmtime_result()
+    }
+
+    async fn github_release_by_tag_name(
+        &mut self,
+        repo: String,
+        tag: String,
+    ) -> wasmtime::Result<Result<github::GithubRelease, String>> {
+        maybe!(async {
+            let release = ::http_client::github::get_release_by_tag_name(
+                &repo,
+                &tag,
+                self.host.http_client.clone(),
+            )
+            .await?;
+            Ok(release.into())
+        })
+        .await
+        .to_wasmtime_result()
+    }
+}
+
+impl platform::Host for WasmState {
+    async fn current_platform(&mut self) -> Result<(platform::Os, platform::Architecture)> {
+        Ok((
+            match env::consts::OS {
+                "macos" => platform::Os::Mac,
+                "linux" => platform::Os::Linux,
+                "windows" => platform::Os::Windows,
+                _ => panic!("unsupported os"),
+            },
+            match env::consts::ARCH {
+                "aarch64" => platform::Architecture::Aarch64,
+                "x86" => platform::Architecture::X86,
+                "x86_64" => platform::Architecture::X8664,
+                _ => panic!("unsupported architecture"),
+            },
+        ))
+    }
+}
+
+impl From<std::process::Output> for process::Output {
+    fn from(output: std::process::Output) -> Self {
+        Self {
+            status: output.status.code(),
+            stdout: output.stdout,
+            stderr: output.stderr,
+        }
+    }
+}
+
+impl process::Host for WasmState {
+    async fn run_command(
+        &mut self,
+        command: process::Command,
+    ) -> wasmtime::Result<Result<process::Output, String>> {
+        maybe!(async {
+            self.manifest.allow_exec(&command.command, &command.args)?;
+
+            let output = util::command::new_smol_command(command.command.as_str())
+                .args(&command.args)
+                .envs(command.env)
+                .output()
+                .await?;
+
+            Ok(output.into())
+        })
+        .await
+        .to_wasmtime_result()
+    }
+}
+
+#[async_trait]
+impl slash_command::Host for WasmState {}
+
+#[async_trait]
+impl context_server::Host for WasmState {}
+
+#[async_trait]
+impl dap::Host for WasmState {}
+
+impl ExtensionImports for WasmState {
+    async fn get_settings(
+        &mut self,
+        location: Option<self::SettingsLocation>,
+        category: String,
+        key: Option<String>,
+    ) -> wasmtime::Result<Result<String, String>> {
+        self.on_main_thread(|cx| {
+            async move {
+                let location = location
+                    .as_ref()
+                    .map(|location| ::settings::SettingsLocation {
+                        worktree_id: WorktreeId::from_proto(location.worktree_id),
+                        path: Path::new(&location.path),
+                    });
+
+                cx.update(|cx| match category.as_str() {
+                    "language" => {
+                        let key = key.map(|k| LanguageName::new(&k));
+                        let settings = AllLanguageSettings::get(location, cx).language(
+                            location,
+                            key.as_ref(),
+                            cx,
+                        );
+                        Ok(serde_json::to_string(&settings::LanguageSettings {
+                            tab_size: settings.tab_size,
+                        })?)
+                    }
+                    "lsp" => {
+                        let settings = key
+                            .and_then(|key| {
+                                ProjectSettings::get(location, cx)
+                                    .lsp
+                                    .get(&::lsp::LanguageServerName::from_proto(key))
+                            })
+                            .cloned()
+                            .unwrap_or_default();
+                        Ok(serde_json::to_string(&settings::LspSettings {
+                            binary: settings.binary.map(|binary| settings::CommandSettings {
+                                path: binary.path,
+                                arguments: binary.arguments,
+                                env: binary.env,
+                            }),
+                            settings: settings.settings,
+                            initialization_options: settings.initialization_options,
+                        })?)
+                    }
+                    "context_servers" => {
+                        let configuration = key
+                            .and_then(|key| {
+                                ProjectSettings::get(location, cx)
+                                    .context_servers
+                                    .get(key.as_str())
+                            })
+                            .cloned()
+                            .unwrap_or_default();
+                        Ok(serde_json::to_string(&settings::ContextServerSettings {
+                            command: configuration.command.map(|command| {
+                                settings::CommandSettings {
+                                    path: Some(command.path),
+                                    arguments: Some(command.args),
+                                    env: command.env.map(|env| env.into_iter().collect()),
+                                }
+                            }),
+                            settings: configuration.settings,
+                        })?)
+                    }
+                    _ => {
+                        bail!("Unknown settings category: {}", category);
+                    }
+                })
+            }
+            .boxed_local()
+        })
+        .await?
+        .to_wasmtime_result()
+    }
+
+    async fn set_language_server_installation_status(
+        &mut self,
+        server_name: String,
+        status: LanguageServerInstallationStatus,
+    ) -> wasmtime::Result<()> {
+        let status = match status {
+            LanguageServerInstallationStatus::CheckingForUpdate => BinaryStatus::CheckingForUpdate,
+            LanguageServerInstallationStatus::Downloading => BinaryStatus::Downloading,
+            LanguageServerInstallationStatus::None => BinaryStatus::None,
+            LanguageServerInstallationStatus::Failed(error) => BinaryStatus::Failed { error },
+        };
+
+        self.host
+            .proxy
+            .update_language_server_status(::lsp::LanguageServerName(server_name.into()), status);
+
+        Ok(())
+    }
+
+    async fn download_file(
+        &mut self,
+        url: String,
+        path: String,
+        file_type: DownloadedFileType,
+    ) -> wasmtime::Result<Result<(), String>> {
+        maybe!(async {
+            let path = PathBuf::from(path);
+            let extension_work_dir = self.host.work_dir.join(self.manifest.id.as_ref());
+
+            self.host.fs.create_dir(&extension_work_dir).await?;
+
+            let destination_path = self
+                .host
+                .writeable_path_from_extension(&self.manifest.id, &path)?;
+
+            let mut response = self
+                .host
+                .http_client
+                .get(&url, Default::default(), true)
+                .await
+                .map_err(|err| anyhow!("error downloading release: {}", err))?;
+
+            if !response.status().is_success() {
+                Err(anyhow!(
+                    "download failed with status {}",
+                    response.status().to_string()
+                ))?;
+            }
+            let body = BufReader::new(response.body_mut());
+
+            match file_type {
+                DownloadedFileType::Uncompressed => {
+                    futures::pin_mut!(body);
+                    self.host
+                        .fs
+                        .create_file_with(&destination_path, body)
+                        .await?;
+                }
+                DownloadedFileType::Gzip => {
+                    let body = GzipDecoder::new(body);
+                    futures::pin_mut!(body);
+                    self.host
+                        .fs
+                        .create_file_with(&destination_path, body)
+                        .await?;
+                }
+                DownloadedFileType::GzipTar => {
+                    let body = GzipDecoder::new(body);
+                    futures::pin_mut!(body);
+                    self.host
+                        .fs
+                        .extract_tar_file(&destination_path, Archive::new(body))
+                        .await?;
+                }
+                DownloadedFileType::Zip => {
+                    futures::pin_mut!(body);
+                    node_runtime::extract_zip(&destination_path, body)
+                        .await
+                        .with_context(|| format!("failed to unzip {} archive", path.display()))?;
+                }
+            }
+
+            Ok(())
+        })
+        .await
+        .to_wasmtime_result()
+    }
+
+    async fn make_file_executable(&mut self, path: String) -> wasmtime::Result<Result<(), String>> {
+        #[allow(unused)]
+        let path = self
+            .host
+            .writeable_path_from_extension(&self.manifest.id, Path::new(&path))?;
+
+        #[cfg(unix)]
+        {
+            use std::fs::{self, Permissions};
+            use std::os::unix::fs::PermissionsExt;
+
+            return fs::set_permissions(&path, Permissions::from_mode(0o755))
+                .map_err(|error| anyhow!("failed to set permissions for path {path:?}: {error}"))
+                .to_wasmtime_result();
+        }
+
+        #[cfg(not(unix))]
+        Ok(Ok(()))
+    }
+}

crates/gpui/src/platform.rs

@@ -595,7 +595,7 @@ impl PlatformTextSystem for NoopTextSystem {
                 .unwrap()
                 .width
             / metrics.units_per_em as f32;
-        let mut glyphs = SmallVec::default();
+        let mut glyphs = Vec::new();
         for (ix, c) in text.char_indices() {
             if let Some(glyph) = self.glyph_for_char(FontId(0), c) {
                 glyphs.push(ShapedGlyph {