Hush little feedback, don't say a word

Closes #ISSUE

Release Notes:

- N/A

.git-blame-ignore-revs

@@ -19,6 +19,10 @@
 # https://github.com/zed-industries/zed/pull/2394
 eca93c124a488b4e538946cd2d313bd571aa2b86
 
+# 2024-02-15 Format YAML files
+# https://github.com/zed-industries/zed/pull/7887
+a161a7d0c95ca7505bf9218bfae640ee5444c88b
+
 # 2024-02-25 Format JSON files in assets/
 # https://github.com/zed-industries/zed/pull/8405
 ffdda588b41f7d9d270ffe76cab116f828ad545e

.github/actions/run_tests/action.yml

@@ -10,7 +10,7 @@ runs:
         cargo install cargo-nextest --locked
 
     - name: Install Node
-      uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4
+      uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4
       with:
         node-version: "18"
 

.github/actions/run_tests_windows/action.yml

@@ -16,7 +16,7 @@ runs:
       run: cargo install cargo-nextest --locked
 
     - name: Install Node
-      uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4
+      uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4
       with:
         node-version: "18"
 

.github/workflows/ci.yml

@@ -209,7 +209,6 @@ jobs:
           cargo check -p workspace
           cargo build -p remote_server
           cargo check -p gpui --examples
-          script/check-rust-livekit-macos
 
       # Since the macOS runners are stateful, so we need to remove the config file to prevent potential bug.
       - name: Clean CI config file
@@ -235,7 +234,7 @@ jobs:
           clean: false
 
       - name: Cache dependencies
-        uses: swatinem/rust-cache@f0deed1e0edfc6a9be95417288c0e1099b1eeec3 # v2
+        uses: swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
           cache-provider: "buildjet"
@@ -287,7 +286,7 @@ jobs:
           clean: false
 
       - name: Cache dependencies
-        uses: swatinem/rust-cache@f0deed1e0edfc6a9be95417288c0e1099b1eeec3 # v2
+        uses: swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
           cache-provider: "buildjet"
@@ -334,7 +333,7 @@ jobs:
           Copy-Item -Path "${{ github.workspace }}" -Destination "${{ env.ZED_WORKSPACE }}" -Recurse
 
       - name: Cache dependencies
-        uses: swatinem/rust-cache@f0deed1e0edfc6a9be95417288c0e1099b1eeec3 # v2
+        uses: swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
           workspaces: ${{ env.ZED_WORKSPACE }}
@@ -393,7 +392,7 @@ jobs:
           Copy-Item -Path "${{ github.workspace }}" -Destination "${{ env.ZED_WORKSPACE }}" -Recurse
 
       - name: Cache dependencies
-        uses: swatinem/rust-cache@f0deed1e0edfc6a9be95417288c0e1099b1eeec3 # v2
+        uses: swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
           workspaces: ${{ env.ZED_WORKSPACE }}
@@ -453,7 +452,6 @@ jobs:
             [[ "${{ needs.linux_tests.result }}"          != 'success' ]] && { RET_CODE=1; echo "Linux tests failed"; }
             [[ "${{ needs.windows_tests.result }}"        != 'success' ]] && { RET_CODE=1; echo "Windows tests failed"; }
             [[ "${{ needs.windows_clippy.result }}"       != 'success' ]] && { RET_CODE=1; echo "Windows clippy failed"; }
-            [[ "${{ needs.migration_checks.result }}"     != 'success' ]] && { RET_CODE=1; echo "Migration checks failed"; }
             [[ "${{ needs.build_remote_server.result }}"  != 'success' ]] && { RET_CODE=1; echo "Remote server build failed"; }
           fi
           if [[ "$RET_CODE" -eq 0 ]]; then
@@ -483,7 +481,7 @@ jobs:
       DIGITALOCEAN_SPACES_SECRET_KEY: ${{ secrets.DIGITALOCEAN_SPACES_SECRET_KEY }}
     steps:
       - name: Install Node
-        uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4
+        uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4
         with:
           node-version: "18"
 
@@ -527,14 +525,14 @@ jobs:
           mv target/x86_64-apple-darwin/release/Zed.dmg target/x86_64-apple-darwin/release/Zed-x86_64.dmg
 
       - name: Upload app bundle (aarch64) to workflow run if main branch or specific label
-        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: ${{ github.ref == 'refs/heads/main' }} || contains(github.event.pull_request.labels.*.name, 'run-bundling') }}
         with:
           name: Zed_${{ github.event.pull_request.head.sha || github.sha }}-aarch64.dmg
           path: target/aarch64-apple-darwin/release/Zed-aarch64.dmg
 
       - name: Upload app bundle (x86_64) to workflow run if main branch or specific label
-        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: ${{ github.ref == 'refs/heads/main' }} || contains(github.event.pull_request.labels.*.name, 'run-bundling') }}
         with:
           name: Zed_${{ github.event.pull_request.head.sha || github.sha }}-x86_64.dmg
@@ -587,7 +585,7 @@ jobs:
         run: script/bundle-linux
 
       - name: Upload Linux bundle to workflow run if main branch or specific label
-        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: |
           github.ref == 'refs/heads/main'
           || contains(github.event.pull_request.labels.*.name, 'run-bundling')
@@ -596,7 +594,7 @@ jobs:
           path: target/release/zed-*.tar.gz
 
       - name: Upload Linux remote server to workflow run if main branch or specific label
-        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: |
           github.ref == 'refs/heads/main'
           || contains(github.event.pull_request.labels.*.name, 'run-bundling')
@@ -648,7 +646,7 @@ jobs:
         run: script/bundle-linux
 
       - name: Upload Linux bundle to workflow run if main branch or specific label
-        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: |
           github.ref == 'refs/heads/main'
           || contains(github.event.pull_request.labels.*.name, 'run-bundling')
@@ -657,7 +655,7 @@ jobs:
           path: target/release/zed-*.tar.gz
 
       - name: Upload Linux remote server to workflow run if main branch or specific label
-        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: |
           github.ref == 'refs/heads/main'
           || contains(github.event.pull_request.labels.*.name, 'run-bundling')

.github/workflows/community_close_stale_issues.yml

@@ -1,7 +1,7 @@
 name: "Close Stale Issues"
 on:
   schedule:
-    - cron: "0 11 * * 2"
+    - cron: "0 7,9,11 * * 2"
   workflow_dispatch:
 
 jobs:

.github/workflows/community_release_actions.yml

@@ -13,11 +13,12 @@ jobs:
         id: get-release-url
         run: |
           if [ "${{ github.event.release.prerelease }}" == "true" ]; then
-            URL="https://zed.dev/releases/preview/latest"
+              URL="https://zed.dev/releases/preview/latest"
           else
-            URL="https://zed.dev/releases/stable/latest"
+              URL="https://zed.dev/releases/stable/latest"
           fi
-          echo "::set-output name=URL::$URL"
+
+          echo "URL=$URL" >> $GITHUB_OUTPUT
       - name: Get content
         uses: 2428392/gh-truncate-string-action@b3ff790d21cf42af3ca7579146eedb93c8fb0757 # v1.4.1
         id: get-content
@@ -33,3 +34,35 @@ jobs:
         with:
           webhook-url: ${{ secrets.DISCORD_WEBHOOK_URL }}
           content: ${{ steps.get-content.outputs.string }}
+
+  send_release_notes_email:
+    if: github.repository_owner == 'zed-industries' && !github.event.release.prerelease
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          fetch-depth: 0
+
+      - name: Check if release was promoted from preview
+        id: check-promotion-from-preview
+        run: |
+          VERSION="${{ github.event.release.tag_name }}"
+          PREVIEW_TAG="${VERSION}-pre"
+
+          if git rev-parse "$PREVIEW_TAG" > /dev/null 2>&1; then
+              echo "was_promoted_from_preview=true" >> $GITHUB_OUTPUT
+          else
+              echo "was_promoted_from_preview=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Send release notes email
+        if: steps.check-promotion-from-preview.outputs.was_promoted_from_preview == 'true'
+        run: |
+          TAG="${{ github.event.release.tag_name }}"
+          echo \"${{ toJSON(github.event.release.body) }}\" > release_body.txt
+          jq -n --arg tag "$TAG" --rawfile body release_body.txt '{version: $tag, markdown_body: $body}' \
+            > release_data.json
+          curl -X POST "https://zed.dev/api/send_release_notes_email" \
+            -H "Authorization: Bearer ${{ secrets.RELEASE_NOTES_API_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            -d @release_data.json

.github/workflows/danger.yml

@@ -22,7 +22,7 @@ jobs:
           version: 9
 
       - name: Setup Node
-        uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4
+        uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4
         with:
           node-version: "20"
           cache: "pnpm"

.github/workflows/deploy_cloudflare.yml

@@ -37,35 +37,35 @@ jobs:
           mdbook build ./docs --dest-dir=../target/deploy/docs/
 
       - name: Deploy Docs
-        uses: cloudflare/wrangler-action@392082e81ffbcb9ebdde27400634aa004b35ea37 # v3
+        uses: cloudflare/wrangler-action@da0e0dfe58b7a431659754fdf3f186c529afbe65 # v3
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
           command: pages deploy target/deploy --project-name=docs
 
       - name: Deploy Install
-        uses: cloudflare/wrangler-action@392082e81ffbcb9ebdde27400634aa004b35ea37 # v3
+        uses: cloudflare/wrangler-action@da0e0dfe58b7a431659754fdf3f186c529afbe65 # v3
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
           command: r2 object put -f script/install.sh zed-open-source-website-assets/install.sh
 
       - name: Deploy Docs Workers
-        uses: cloudflare/wrangler-action@392082e81ffbcb9ebdde27400634aa004b35ea37 # v3
+        uses: cloudflare/wrangler-action@da0e0dfe58b7a431659754fdf3f186c529afbe65 # v3
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
           command: deploy .cloudflare/docs-proxy/src/worker.js
 
       - name: Deploy Install Workers
-        uses: cloudflare/wrangler-action@392082e81ffbcb9ebdde27400634aa004b35ea37 # v3
+        uses: cloudflare/wrangler-action@da0e0dfe58b7a431659754fdf3f186c529afbe65 # v3
         with:
           apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
           accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
           command: deploy .cloudflare/docs-proxy/src/worker.js
 
       - name: Preserve Wrangler logs
-        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         if: always()
         with:
           name: wrangler_logs

.github/workflows/issue_response.yml

@@ -18,7 +18,7 @@ jobs:
           version: 9
 
       - name: Setup Node
-        uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4
+        uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4
         with:
           node-version: "20"
           cache: "pnpm"

.github/workflows/publish_extension_cli.yml

@@ -22,7 +22,7 @@ jobs:
           clean: false
 
       - name: Cache dependencies
-        uses: swatinem/rust-cache@f0deed1e0edfc6a9be95417288c0e1099b1eeec3 # v2
+        uses: swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
           cache-provider: "github"

.github/workflows/randomized_tests.yml

@@ -23,7 +23,7 @@ jobs:
       - buildjet-16vcpu-ubuntu-2204
     steps:
       - name: Install Node
-        uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4
+        uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4
         with:
           node-version: "18"
 

.github/workflows/release_nightly.yml

@@ -71,7 +71,7 @@ jobs:
       ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON: ${{ secrets.ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON }}
     steps:
       - name: Install Node
-        uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4
+        uses: actions/setup-node@cdca7365b2dadb8aad0a33bc7601856ffabcc48e # v4
         with:
           node-version: "18"
 
@@ -170,6 +170,58 @@ jobs:
       - name: Upload Zed Nightly
         run: script/upload-nightly linux-targz
 
+  bundle-nix:
+    timeout-minutes: 60
+    name: (${{ matrix.system.os }}) Nix Build
+    continue-on-error: true
+    strategy:
+      fail-fast: false
+      matrix:
+        system:
+          - os: x86 Linux
+            runner: buildjet-16vcpu-ubuntu-2204
+            install_nix: true
+          - os: arm Mac
+            # TODO: once other macs are provisioned for nix, remove that constraint from the runner
+            runner: [macOS, ARM64, nix]
+            install_nix: false
+          - os: arm Linux
+            runner: buildjet-16vcpu-ubuntu-2204-arm
+            install_nix: true
+    if: github.repository_owner == 'zed-industries'
+    runs-on: ${{ matrix.system.runner }}
+    needs: tests
+    env:
+      ZED_CLIENT_CHECKSUM_SEED: ${{ secrets.ZED_CLIENT_CHECKSUM_SEED }}
+      ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON: ${{ secrets.ZED_CLOUD_PROVIDER_ADDITIONAL_MODELS_JSON }}
+      GIT_LFS_SKIP_SMUDGE: 1 # breaks the livekit rust sdk examples which we don't actually depend on
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          clean: false
+
+      # on our macs we manually install nix. for some reason the cachix action is running
+      # under a non-login /bin/bash shell which doesn't source the proper script to add the
+      # nix profile to PATH, so we manually add them here
+      - name: Set path
+        if: ${{ ! matrix.system.install_nix }}
+        run: |
+          echo "/nix/var/nix/profiles/default/bin" >> $GITHUB_PATH
+          echo "/Users/administrator/.nix-profile/bin" >> $GITHUB_PATH
+
+      - uses: cachix/install-nix-action@02a151ada4993995686f9ed4f1be7cfbb229e56f # v31
+        if: ${{ matrix.system.install_nix }}
+        with:
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: cachix/cachix-action@0fc020193b5a1fa3ac4575aa3a7d3aa6a35435ad # v16
+        with:
+          name: zed-industries
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - run: nix build
+      - run: nix-collect-garbage -d
+
   update-nightly-tag:
     name: Update nightly tag
     if: github.repository_owner == 'zed-industries'

.zed/debug.json

@@ -0,0 +1,19 @@
+[
+  {
+    "label": "Debug Zed with LLDB",
+    "adapter": "lldb",
+    "program": "$ZED_WORKTREE_ROOT/target/debug/zed",
+    "request": "launch",
+    "cwd": "$ZED_WORKTREE_ROOT"
+  },
+  {
+    "label": "Debug Zed with GDB",
+    "adapter": "gdb",
+    "program": "$ZED_WORKTREE_ROOT/target/debug/zed",
+    "request": "launch",
+    "cwd": "$ZED_WORKTREE_ROOT",
+    "initialize_args": {
+      "stopAtBeginningOfMainSubprogram": true
+    }
+  }
+]

Cargo.toml

@@ -8,6 +8,7 @@ members = [
     "crates/assistant",
     "crates/assistant2",
     "crates/assistant_context_editor",
+    "crates/assistant_eval",
     "crates/assistant_settings",
     "crates/assistant_slash_command",
     "crates/assistant_slash_commands",
@@ -36,6 +37,10 @@ members = [
     "crates/context_server_settings",
     "crates/copilot",
     "crates/credentials_provider",
+    "crates/dap",
+    "crates/dap_adapters",
+    "crates/debugger_tools",
+    "crates/debugger_ui",
     "crates/db",
     "crates/deepseek",
     "crates/diagnostics",
@@ -64,6 +69,7 @@ members = [
     "crates/gpui_tokio",
     "crates/html_to_markdown",
     "crates/http_client",
+    "crates/http_client_tls",
     "crates/image_viewer",
     "crates/indexed_docs",
     "crates/inline_completion",
@@ -80,7 +86,6 @@ members = [
     "crates/languages",
     "crates/livekit_api",
     "crates/livekit_client",
-    "crates/livekit_client_macos",
     "crates/lmstudio",
     "crates/lsp",
     "crates/markdown",
@@ -154,6 +159,7 @@ members = [
     "crates/ui",
     "crates/ui_input",
     "crates/ui_macros",
+    "crates/ui_prompt",
     "crates/util",
     "crates/util_macros",
     "crates/vim",
@@ -206,6 +212,7 @@ assets = { path = "crates/assets" }
 assistant = { path = "crates/assistant" }
 assistant2 = { path = "crates/assistant2" }
 assistant_context_editor = { path = "crates/assistant_context_editor" }
+assistant_eval = { path = "crates/assistant_eval" }
 assistant_settings = { path = "crates/assistant_settings" }
 assistant_slash_command = { path = "crates/assistant_slash_command" }
 assistant_slash_commands = { path = "crates/assistant_slash_commands" }
@@ -233,7 +240,11 @@ context_server = { path = "crates/context_server" }
 context_server_settings = { path = "crates/context_server_settings" }
 copilot = { path = "crates/copilot" }
 credentials_provider = { path = "crates/credentials_provider" }
+dap = { path = "crates/dap" }
+dap_adapters = { path = "crates/dap_adapters" }
 db = { path = "crates/db" }
+debugger_ui = { path = "crates/debugger_ui" }
+debugger_tools = { path = "crates/debugger_tools" }
 deepseek = { path = "crates/deepseek" }
 diagnostics = { path = "crates/diagnostics" }
 buffer_diff = { path = "crates/buffer_diff" }
@@ -260,6 +271,7 @@ gpui_macros = { path = "crates/gpui_macros" }
 gpui_tokio = { path = "crates/gpui_tokio" }
 html_to_markdown = { path = "crates/html_to_markdown" }
 http_client = { path = "crates/http_client" }
+http_client_tls = { path = "crates/http_client_tls" }
 image_viewer = { path = "crates/image_viewer" }
 indexed_docs = { path = "crates/indexed_docs" }
 inline_completion = { path = "crates/inline_completion" }
@@ -276,7 +288,6 @@ language_tools = { path = "crates/language_tools" }
 languages = { path = "crates/languages" }
 livekit_api = { path = "crates/livekit_api" }
 livekit_client = { path = "crates/livekit_client" }
-livekit_client_macos = { path = "crates/livekit_client_macos" }
 lmstudio = { path = "crates/lmstudio" }
 lsp = { path = "crates/lsp" }
 markdown = { path = "crates/markdown" }
@@ -350,6 +361,7 @@ toolchain_selector = { path = "crates/toolchain_selector" }
 ui = { path = "crates/ui" }
 ui_input = { path = "crates/ui_input" }
 ui_macros = { path = "crates/ui_macros" }
+ui_prompt = { path = "crates/ui_prompt" }
 util = { path = "crates/util" }
 util_macros = { path = "crates/util_macros" }
 vim = { path = "crates/vim" }
@@ -395,17 +407,20 @@ blade-util = { git = "https://github.com/kvark/blade", rev = "b16f5c7bd873c7126f
 naga = { version = "23.1.0", features = ["wgsl-in"] }
 blake3 = "1.5.3"
 bytes = "1.0"
-cargo_metadata = "0.19"
+cargo_metadata = { git = "https://github.com/zed-industries/cargo_metadata", rev = "ce8171bad673923d61a77b6761d0dc4aff63398a"}
 cargo_toml = "0.21"
 chrono = { version = "0.4", features = ["serde"] }
+circular-buffer = "1.0"
 clap = { version = "4.4", features = ["derive"] }
 cocoa = "0.26"
 cocoa-foundation = "0.2.0"
+core-video = { version = "0.4.3", features = ["metal"] }
 convert_case = "0.8.0"
-core-foundation = "0.9.3"
+core-foundation = "0.10.0"
 core-foundation-sys = "0.8.6"
 ctor = "0.4.0"
 dashmap = "6.0"
+dap-types = { git = "https://github.com/zed-industries/dap-types", rev = "bfd4af0" }
 derive_more = "0.99.17"
 dirs = "4.0"
 ec4rs = "1.1"
@@ -417,8 +432,7 @@ fork = "0.2.0"
 futures = "0.3"
 futures-batch = "0.6.1"
 futures-lite = "1.13"
-# TODO: get back to regular versions when https://github.com/rust-lang/git2-rs/pull/1120 is released
-git2 = { git = "https://github.com/rust-lang/git2-rs", rev = "a3b90cb3756c1bb63e2317bf9cfa57838178de5c", default-features = false }
+git2 = { version = "0.20.1", default-features = false }
 globset = "0.4"
 handlebars = "4.3"
 heed = { version = "0.21.0", features = ["read-txn-no-tls"] }
@@ -440,11 +454,6 @@ libc = "0.2"
 libsqlite3-sys = { version = "0.30.1", features = ["bundled"] }
 linkify = "0.10.0"
 linkme = "0.3.31"
-livekit = { git = "https://github.com/zed-industries/livekit-rust-sdks", rev = "811ceae29fabee455f110c56cd66b3f49a7e5003", features = [
-    "dispatcher",
-    "services-dispatcher",
-    "rustls-tls-native-roots",
-], default-features = false }
 log = { version = "0.4.16", features = ["kv_unstable_serde", "serde"] }
 markup5ever_rcdom = "0.3.0"
 mlua = { version = "0.10", features = ["lua54", "vendored", "async", "send"] }
@@ -520,7 +529,7 @@ sys-locale = "0.3.1"
 sysinfo = "0.31.0"
 take-until = "0.2.0"
 tempfile = "3.9.0"
-thiserror = "1.0.29"
+thiserror = "2.0.12"
 tiktoken-rs = "0.6.0"
 time = { version = "0.3", features = [
     "macros",
@@ -532,6 +541,7 @@ time = { version = "0.3", features = [
 tiny_http = "0.8"
 toml = "0.8"
 tokio = { version = "1" }
+tokio-tungstenite = { version = "0.26", features = ["__rustls-tls"]}
 tower-http = "0.4.4"
 tree-sitter = { version = "0.25.3", features = ["wasm"] }
 tree-sitter-bash = "0.23"
@@ -561,6 +571,7 @@ unindent = "0.2.0"
 unicode-segmentation = "1.10"
 unicode-script = "0.5.7"
 url = "2.2"
+urlencoding = "2.1.2"
 uuid = { version = "1.1.2", features = ["v4", "v5", "v7", "serde"] }
 wasmparser = "0.221"
 wasm-encoder = "0.221"
@@ -576,7 +587,7 @@ which = "6.0.0"
 wit-component = "0.221"
 zed_llm_client = "0.4"
 zstd = "0.11"
-metal = "0.31"
+metal = "0.29"
 
 [workspace.dependencies.async-stripe]
 git = "https://github.com/zed-industries/async-stripe"

assets/icons/debug.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-bug"><path d="m8 2 1.88 1.88"/><path d="M14.12 3.88 16 2"/><path d="M9 7.13v-1a3.003 3.003 0 1 1 6 0v1"/><path d="M12 20c-3.3 0-6-2.7-6-6v-3a4 4 0 0 1 4-4h4a4 4 0 0 1 4 4v3c0 3.3-2.7 6-6 6"/><path d="M12 20v-9"/><path d="M6.53 9C4.6 8.8 3 7.1 3 5"/><path d="M6 13H2"/><path d="M3 21c0-2.1 1.7-3.9 3.8-4"/><path d="M20.97 5c0 2.1-1.6 3.8-3.5 4"/><path d="M22 13h-4"/><path d="M17.2 17c2.1.1 3.8 1.9 3.8 4"/></svg>

assets/icons/debug_breakpoint.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="currentColor" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-circle"><circle cx="12" cy="12" r="10"/></svg>

assets/icons/debug_continue.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-step-forward"><line x1="6" x2="6" y1="4" y2="20"/><polygon points="10,4 20,12 10,20"/></svg>

assets/icons/debug_disconnect.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-unplug"><path d="m19 5 3-3"/><path d="m2 22 3-3"/><path d="M6.3 20.3a2.4 2.4 0 0 0 3.4 0L12 18l-6-6-2.3 2.3a2.4 2.4 0 0 0 0 3.4Z"/><path d="M7.5 13.5 10 11"/><path d="M10.5 16.5 13 14"/><path d="m12 6 6 6 2.3-2.3a2.4 2.4 0 0 0 0-3.4l-2.6-2.6a2.4 2.4 0 0 0-3.4 0Z"/></svg>

assets/icons/debug_ignore_breakpoints.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-circle-off"><path d="m2 2 20 20"/><path d="M8.35 2.69A10 10 0 0 1 21.3 15.65"/><path d="M19.08 19.08A10 10 0 1 1 4.92 4.92"/></svg>

assets/icons/debug_log_breakpoint.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="currentColor" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-message-circle"><path d="M7.9 20A9 9 0 1 0 4 16.1L2 22Z"/></svg>

assets/icons/debug_pause.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-pause"><rect x="14" y="4" width="4" height="16" rx="1"/><rect x="6" y="4" width="4" height="16" rx="1"/></svg>

assets/icons/debug_restart.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-rotate-ccw"><path d="M3 12a9 9 0 1 0 9-9 9.75 9.75 0 0 0-6.74 2.74L3 8"/><path d="M3 3v5h5"/></svg>

assets/icons/debug_step_back.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-undo-dot"><path d="M21 17a9 9 0 0 0-15-6.7L3 13"/><path d="M3 7v6h6"/><circle cx="12" cy="17" r="1"/></svg>

assets/icons/debug_step_into.svg

@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-arrow-up-from-dot">
+  <path d="m5 15 7 7 7-7"/>
+  <path d="M12 8v14"/>
+  <circle cx="12" cy="3" r="1"/>
+</svg>

assets/icons/debug_step_out.svg

@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-arrow-up-from-dot">
+  <path d="m3 10 9-8 9 8"/>
+  <path d="M12 17V2"/>
+  <circle cx="12" cy="21" r="1"/>
+</svg>

assets/icons/debug_step_over.svg

@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-redo-dot">
+  <circle cx="12" cy="17" r="1"/>
+  <path d="M21 7v6h-6"/>
+  <path d="M3 17a9 9 0 0 1 9-9 9 9 0 0 1 6 2.3l3 2.7"/>
+</svg>

assets/icons/debug_stop.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-square"><rect width="18" height="18" x="3" y="3" rx="2"/></svg>

assets/keymaps/default-linux.json

@@ -30,6 +30,13 @@
       "ctrl-0": ["zed::ResetBufferFontSize", { "persist": false }],
       "ctrl-,": "zed::OpenSettings",
       "ctrl-q": "zed::Quit",
+      "f4": "debugger::Start",
+      "f5": "debugger::Continue",
+      "shift-f5": "debugger::Stop",
+      "f6": "debugger::Pause",
+      "f7": "debugger::StepOver",
+      "cmd-f11": "debugger::StepInto",
+      "shift-f11": "debugger::StepOut",
       "f11": "zed::ToggleFullScreen",
       "ctrl-alt-z": "edit_prediction::RateCompletions",
       "ctrl-shift-i": "edit_prediction::ToggleMenu"
@@ -46,7 +53,9 @@
     "context": "Prompt",
     "bindings": {
       "left": "menu::SelectPrevious",
-      "right": "menu::SelectNext"
+      "right": "menu::SelectNext",
+      "h": "menu::SelectPrevious",
+      "l": "menu::SelectNext"
     }
   },
   {
@@ -107,6 +116,7 @@
       "ctrl-a": "editor::SelectAll",
       "ctrl-l": "editor::SelectLine",
       "ctrl-shift-i": "editor::Format",
+      "alt-shift-o": "editor::OrganizeImports",
       // "cmd-shift-left": ["editor::SelectToBeginningOfLine", {"stop_at_soft_wraps": true, "stop_at_indent": true }],
       // "ctrl-shift-a": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": true, "stop_at_indent": true }],
       "shift-home": ["editor::SelectToBeginningOfLine", { "stop_at_soft_wraps": true, "stop_at_indent": true }],
@@ -123,7 +133,9 @@
       "alt-g b": "editor::ToggleGitBlame",
       "menu": "editor::OpenContextMenu",
       "shift-f10": "editor::OpenContextMenu",
-      "ctrl-shift-e": "editor::ToggleEditPrediction"
+      "ctrl-shift-e": "editor::ToggleEditPrediction",
+      "f9": "editor::ToggleBreakpoint",
+      "shift-f9": "editor::EditLogBreakpoint"
     }
   },
   {
@@ -742,6 +754,8 @@
       "escape": "git_panel::ToggleFocus",
       "ctrl-enter": "git::Commit",
       "alt-enter": "menu::SecondaryConfirm",
+      "delete": "git::RestoreFile",
+      "shift-delete": "git::RestoreFile",
       "backspace": "git::RestoreFile"
     }
   },

assets/keymaps/default-macos.json

@@ -14,6 +14,13 @@
   {
     "use_key_equivalents": true,
     "bindings": {
+      "f4": "debugger::Start",
+      "f5": "debugger::Continue",
+      "shift-f5": "debugger::Stop",
+      "f6": "debugger::Pause",
+      "f7": "debugger::StepOver",
+      "f11": "debugger::StepInto",
+      "shift-f11": "debugger::StepOut",
       "home": "menu::SelectFirst",
       "shift-pageup": "menu::SelectFirst",
       "pageup": "menu::SelectFirst",
@@ -148,6 +155,8 @@
       "cmd-\"": "editor::ExpandAllDiffHunks",
       "cmd-alt-g b": "editor::ToggleGitBlame",
       "cmd-i": "editor::ShowSignatureHelp",
+      "f9": "editor::ToggleBreakpoint",
+      "shift-f9": "editor::EditLogBreakpoint",
       "ctrl-f12": "editor::GoToDeclaration",
       "alt-ctrl-f12": "editor::GoToDeclarationSplit",
       "ctrl-cmd-e": "editor::ToggleEditPrediction"
@@ -696,6 +705,16 @@
       "ctrl-]": "assistant::CycleNextInlineAssist"
     }
   },
+  {
+    "context": "Prompt",
+    "use_key_equivalents": true,
+    "bindings": {
+      "left": "menu::SelectPrevious",
+      "right": "menu::SelectNext",
+      "h": "menu::SelectPrevious",
+      "l": "menu::SelectNext"
+    }
+  },
   {
     "context": "ProjectSearchBar && !in_replace",
     "use_key_equivalents": true,
@@ -756,6 +775,14 @@
       "space": "project_panel::Open"
     }
   },
+  {
+    "context": "VariableList",
+    "use_key_equivalents": true,
+    "bindings": {
+      "left": "variable_list::CollapseSelectedEntry",
+      "right": "variable_list::ExpandSelectedEntry"
+    }
+  },
   {
     "context": "GitPanel && ChangesList",
     "use_key_equivalents": true,
@@ -774,6 +801,8 @@
       "shift-tab": "git_panel::FocusEditor",
       "escape": "git_panel::ToggleFocus",
       "cmd-enter": "git::Commit",
+      "delete": "git::RestoreFile",
+      "cmd-backspace": "git::RestoreFile",
       "backspace": "git::RestoreFile"
     }
   },

assets/keymaps/linux/jetbrains.json

@@ -3,7 +3,14 @@
     "bindings": {
       "ctrl-alt-s": "zed::OpenSettings",
       "ctrl-{": "pane::ActivatePreviousItem",
-      "ctrl-}": "pane::ActivateNextItem"
+      "ctrl-}": "pane::ActivateNextItem",
+      "ctrl-f2": "debugger::Stop",
+      "f6": "debugger::Pause",
+      "f7": "debugger::StepInto",
+      "f8": "debugger::StepOver",
+      "shift-f8": "debugger::StepOut",
+      "f9": "debugger::Continue",
+      "alt-shift-f9": "debugger::Start"
     }
   },
   {
@@ -31,6 +38,7 @@
       "shift-alt-up": "editor::MoveLineUp",
       "shift-alt-down": "editor::MoveLineDown",
       "ctrl-alt-l": "editor::Format",
+      "ctrl-alt-o": "editor::OrganizeImports",
       "shift-f6": "editor::Rename",
       "ctrl-alt-left": "pane::GoBack",
       "ctrl-alt-right": "pane::GoForward",
@@ -48,7 +56,9 @@
       "ctrl-home": "editor::MoveToBeginning",
       "ctrl-end": "editor::MoveToEnd",
       "ctrl-shift-home": "editor::SelectToBeginning",
-      "ctrl-shift-end": "editor::SelectToEnd"
+      "ctrl-shift-end": "editor::SelectToEnd",
+      "ctrl-f8": "editor::ToggleBreakpoint",
+      "ctrl-shift-f8": "editor::EditLogBreakpoint"
     }
   },
   {

assets/keymaps/macos/jetbrains.json

@@ -2,7 +2,14 @@
   {
     "bindings": {
       "cmd-{": "pane::ActivatePreviousItem",
-      "cmd-}": "pane::ActivateNextItem"
+      "cmd-}": "pane::ActivateNextItem",
+      "ctrl-f2": "debugger::Stop",
+      "f6": "debugger::Pause",
+      "f7": "debugger::StepInto",
+      "f8": "debugger::StepOver",
+      "shift-f8": "debugger::StepOut",
+      "f9": "debugger::Continue",
+      "alt-shift-f9": "debugger::Start"
     }
   },
   {
@@ -29,6 +36,7 @@
       "shift-alt-up": "editor::MoveLineUp",
       "shift-alt-down": "editor::MoveLineDown",
       "cmd-alt-l": "editor::Format",
+      "ctrl-alt-o": "editor::OrganizeImports",
       "shift-f6": "editor::Rename",
       "cmd-[": "pane::GoBack",
       "cmd-]": "pane::GoForward",
@@ -45,7 +53,9 @@
       "cmd-home": "editor::MoveToBeginning",
       "cmd-end": "editor::MoveToEnd",
       "cmd-shift-home": "editor::SelectToBeginning",
-      "cmd-shift-end": "editor::SelectToEnd"
+      "cmd-shift-end": "editor::SelectToEnd",
+      "ctrl-f8": "editor::ToggleBreakpoint",
+      "ctrl-shift-f8": "editor::EditLogBreakpoint"
     }
   },
   {

assets/prompts/assistant_system_prompt.hbs

@@ -14,5 +14,19 @@ Be concise and direct in your responses.
 The user has opened a project that contains the following root directories/files:
 
 {{#each worktrees}}
-- {{root_name}} (absolute path: {{abs_path}})
+- `{{root_name}}` (absolute path: `{{abs_path}}`)
 {{/each}}
+{{#if has_rules}}
+
+There are rules that apply to these root directories:
+{{#each worktrees}}
+{{#if rules_file}}
+
+`{{root_name}}/{{rules_file.rel_path}}`:
+
+``````
+{{{rules_file.text}}}
+``````
+{{/if}}
+{{/each}}
+{{/if}}

assets/settings/default.json

@@ -136,6 +136,11 @@
   // Whether to use the system provided dialogs for Open and Save As.
   // When set to false, Zed will use the built-in keyboard-first pickers.
   "use_system_path_prompts": true,
+  // Whether to use the system provided dialogs for prompts, such as confirmation
+  // prompts.
+  // When set to false, Zed will use its built-in prompts. Note that on Linux,
+  // this option is ignored and Zed will always use the built-in prompts.
+  "use_system_prompts": true,
   // Whether the cursor blinks in the editor.
   "cursor_blink": true,
   // Cursor shape for the default editor.
@@ -324,6 +329,8 @@
     "code_actions": true,
     // Whether to show runnables buttons in the gutter.
     "runnables": true,
+    // Whether to show breakpoints in the gutter.
+    "breakpoints": true,
     // Whether to show fold buttons in the gutter.
     "folds": true
   },
@@ -850,8 +857,24 @@
       //
       // The minimum column number to show the inline blame information at
       // "min_column": 0
-    }
+    },
+    // How git hunks are displayed visually in the editor.
+    // This setting can take two values:
+    //
+    // 1. Show unstaged hunks filled and staged hunks hollow:
+    //    "hunk_style": "staged_hollow"
+    // 2. Show unstaged hunks hollow and staged hunks filled:
+    //    "hunk_style": "unstaged_hollow"
+    "hunk_style": "staged_hollow"
   },
+  // The list of custom Git hosting providers.
+  "git_hosting_providers": [
+    // {
+    //   "provider": "github",
+    //   "name": "BigCorp GitHub",
+    //   "base_url": "https://code.big-corp.com"
+    // }
+  ],
   // Configuration for how direnv configuration should be loaded. May take 2 values:
   // 1. Load direnv configuration using `direnv export json` directly.
   //      "load_direnv": "direct"
@@ -1437,6 +1460,12 @@
   //   }
   // ]
   "ssh_connections": [],
+
   // Configures context servers for use in the Assistant.
-  "context_servers": {}
+  "context_servers": {},
+  "debugger": {
+    "stepping_granularity": "line",
+    "save_breakpoints": true,
+    "button": true
+  }
 }

assets/settings/initial_debug_tasks.json

@@ -0,0 +1,32 @@
+[
+  {
+    "label": "Debug active PHP file",
+    "adapter": "php",
+    "program": "$ZED_FILE",
+    "request": "launch",
+    "cwd": "$ZED_WORKTREE_ROOT"
+  },
+  {
+    "label": "Debug active Python file",
+    "adapter": "python",
+    "program": "$ZED_FILE",
+    "request": "launch",
+    "cwd": "$ZED_WORKTREE_ROOT"
+  },
+  {
+    "label": "Debug active JavaScript file",
+    "adapter": "javascript",
+    "program": "$ZED_FILE",
+    "request": "launch",
+    "cwd": "$ZED_WORKTREE_ROOT"
+  },
+  {
+    "label": "JavaScript debug terminal",
+    "adapter": "javascript",
+    "request": "launch",
+    "cwd": "$ZED_WORKTREE_ROOT",
+    "initialize_args": {
+      "console": "integratedTerminal"
+    }
+  }
+]

crates/activity_indicator/Cargo.toml

@@ -20,7 +20,6 @@ extension_host.workspace = true
 futures.workspace = true
 gpui.workspace = true
 language.workspace = true
-lsp.workspace = true
 project.workspace = true
 smallvec.workspace = true
 ui.workspace = true

crates/activity_indicator/src/activity_indicator.rs

@@ -7,8 +7,7 @@ use gpui::{
     EventEmitter, InteractiveElement as _, ParentElement as _, Render, SharedString,
     StatefulInteractiveElement, Styled, Transformation, Window,
 };
-use language::{LanguageRegistry, LanguageServerBinaryStatus, LanguageServerId};
-use lsp::LanguageServerName;
+use language::{BinaryStatus, LanguageRegistry, LanguageServerId};
 use project::{
     EnvironmentErrorMessage, LanguageServerProgress, LspStoreEvent, Project,
     ProjectEnvironmentEvent, WorktreeId,
@@ -23,21 +22,21 @@ actions!(activity_indicator, [ShowErrorMessage]);
 
 pub enum Event {
     ShowError {
-        lsp_name: LanguageServerName,
+        server_name: SharedString,
         error: String,
     },
 }
 
 pub struct ActivityIndicator {
-    statuses: Vec<LspStatus>,
+    statuses: Vec<ServerStatus>,
     project: Entity<Project>,
     auto_updater: Option<Entity<AutoUpdater>>,
     context_menu_handle: PopoverMenuHandle<ContextMenu>,
 }
 
-struct LspStatus {
-    name: LanguageServerName,
-    status: LanguageServerBinaryStatus,
+struct ServerStatus {
+    name: SharedString,
+    status: BinaryStatus,
 }
 
 struct PendingWork<'a> {
@@ -64,11 +63,24 @@ impl ActivityIndicator {
         let auto_updater = AutoUpdater::get(cx);
         let this = cx.new(|cx| {
             let mut status_events = languages.language_server_binary_statuses();
-            cx.spawn(|this, mut cx| async move {
+            cx.spawn(async move |this, cx| {
                 while let Some((name, status)) = status_events.next().await {
-                    this.update(&mut cx, |this: &mut ActivityIndicator, cx| {
+                    this.update(cx, |this: &mut ActivityIndicator, cx| {
                         this.statuses.retain(|s| s.name != name);
-                        this.statuses.push(LspStatus { name, status });
+                        this.statuses.push(ServerStatus { name, status });
+                        cx.notify();
+                    })?;
+                }
+                anyhow::Ok(())
+            })
+            .detach();
+
+            let mut status_events = languages.dap_server_binary_statuses();
+            cx.spawn(async move |this, cx| {
+                while let Some((name, status)) = status_events.next().await {
+                    this.update(cx, |this, cx| {
+                        this.statuses.retain(|s| s.name != name);
+                        this.statuses.push(ServerStatus { name, status });
                         cx.notify();
                     })?;
                 }
@@ -106,25 +118,25 @@ impl ActivityIndicator {
         });
 
         cx.subscribe_in(&this, window, move |_, _, event, window, cx| match event {
-            Event::ShowError { lsp_name, error } => {
+            Event::ShowError { server_name, error } => {
                 let create_buffer = project.update(cx, |project, cx| project.create_buffer(cx));
                 let project = project.clone();
                 let error = error.clone();
-                let lsp_name = lsp_name.clone();
-                cx.spawn_in(window, |workspace, mut cx| async move {
+                let server_name = server_name.clone();
+                cx.spawn_in(window, async move |workspace, cx| {
                     let buffer = create_buffer.await?;
-                    buffer.update(&mut cx, |buffer, cx| {
+                    buffer.update(cx, |buffer, cx| {
                         buffer.edit(
                             [(
                                 0..0,
-                                format!("Language server error: {}\n\n{}", lsp_name, error),
+                                format!("Language server error: {}\n\n{}", server_name, error),
                             )],
                             None,
                             cx,
                         );
                         buffer.set_capability(language::Capability::ReadOnly, cx);
                     })?;
-                    workspace.update_in(&mut cx, |workspace, window, cx| {
+                    workspace.update_in(cx, |workspace, window, cx| {
                         workspace.add_item_to_active_pane(
                             Box::new(cx.new(|cx| {
                                 Editor::for_buffer(buffer, Some(project.clone()), window, cx)
@@ -147,9 +159,9 @@ impl ActivityIndicator {
 
     fn show_error_message(&mut self, _: &ShowErrorMessage, _: &mut Window, cx: &mut Context<Self>) {
         self.statuses.retain(|status| {
-            if let LanguageServerBinaryStatus::Failed { error } = &status.status {
+            if let BinaryStatus::Failed { error } = &status.status {
                 cx.emit(Event::ShowError {
-                    lsp_name: status.name.clone(),
+                    server_name: status.name.clone(),
                     error: error.clone(),
                 });
                 false
@@ -278,12 +290,10 @@ impl ActivityIndicator {
         let mut failed = SmallVec::<[_; 3]>::new();
         for status in &self.statuses {
             match status.status {
-                LanguageServerBinaryStatus::CheckingForUpdate => {
-                    checking_for_update.push(status.name.clone())
-                }
-                LanguageServerBinaryStatus::Downloading => downloading.push(status.name.clone()),
-                LanguageServerBinaryStatus::Failed { .. } => failed.push(status.name.clone()),
-                LanguageServerBinaryStatus::None => {}
+                BinaryStatus::CheckingForUpdate => checking_for_update.push(status.name.clone()),
+                BinaryStatus::Downloading => downloading.push(status.name.clone()),
+                BinaryStatus::Failed { .. } => failed.push(status.name.clone()),
+                BinaryStatus::None => {}
             }
         }
 
@@ -296,7 +306,7 @@ impl ActivityIndicator {
                 ),
                 message: format!(
                     "Downloading {}...",
-                    downloading.iter().map(|name| name.0.as_ref()).fold(
+                    downloading.iter().map(|name| name.as_ref()).fold(
                         String::new(),
                         |mut acc, s| {
                             if !acc.is_empty() {
@@ -324,7 +334,7 @@ impl ActivityIndicator {
                 ),
                 message: format!(
                     "Checking for updates to {}...",
-                    checking_for_update.iter().map(|name| name.0.as_ref()).fold(
+                    checking_for_update.iter().map(|name| name.as_ref()).fold(
                         String::new(),
                         |mut acc, s| {
                             if !acc.is_empty() {
@@ -354,7 +364,7 @@ impl ActivityIndicator {
                     "Failed to run {}. Click to show error.",
                     failed
                         .iter()
-                        .map(|name| name.0.as_ref())
+                        .map(|name| name.as_ref())
                         .fold(String::new(), |mut acc, s| {
                             if !acc.is_empty() {
                                 acc.push_str(", ");

crates/askpass/src/askpass.rs

@@ -34,9 +34,9 @@ impl AskPassDelegate {
         password_prompt: impl Fn(String, oneshot::Sender<String>, &mut AsyncApp) + Send + Sync + 'static,
     ) -> Self {
         let (tx, mut rx) = mpsc::unbounded::<(String, oneshot::Sender<String>)>();
-        let task = cx.spawn(|mut cx| async move {
+        let task = cx.spawn(async move |cx: &mut AsyncApp| {
             while let Some((prompt, channel)) = rx.next().await {
-                password_prompt(prompt, channel, &mut cx);
+                password_prompt(prompt, channel, cx);
             }
         });
         Self { tx, _task: task }

crates/assistant/src/assistant.rs

@@ -98,9 +98,9 @@ pub fn init(
     AssistantSettings::register(cx);
     SlashCommandSettings::register(cx);
 
-    cx.spawn(|mut cx| {
+    cx.spawn({
         let client = client.clone();
-        async move {
+        async move |cx| {
             let is_search_slash_command_enabled = cx
                 .update(|cx| cx.wait_for_flag::<SearchSlashCommandFeatureFlag>())?
                 .await;
@@ -116,7 +116,7 @@ pub fn init(
             let semantic_index = SemanticDb::new(
                 paths::embeddings_dir().join("semantic-index-db.0.mdb"),
                 Arc::new(embedding_provider),
-                &mut cx,
+                cx,
             )
             .await?;
 

crates/assistant/src/assistant_panel.rs

@@ -98,16 +98,16 @@ impl AssistantPanel {
         prompt_builder: Arc<PromptBuilder>,
         cx: AsyncWindowContext,
     ) -> Task<Result<Entity<Self>>> {
-        cx.spawn(|mut cx| async move {
+        cx.spawn(async move |cx| {
             let slash_commands = Arc::new(SlashCommandWorkingSet::default());
             let context_store = workspace
-                .update(&mut cx, |workspace, cx| {
+                .update(cx, |workspace, cx| {
                     let project = workspace.project().clone();
                     ContextStore::new(project, prompt_builder.clone(), slash_commands, cx)
                 })?
                 .await?;
 
-            workspace.update_in(&mut cx, |workspace, window, cx| {
+            workspace.update_in(cx, |workspace, window, cx| {
                 // TODO: deserialize state.
                 cx.new(|cx| Self::new(workspace, context_store, window, cx))
             })
@@ -357,9 +357,9 @@ impl AssistantPanel {
     ) -> Task<()> {
         let mut status_rx = client.status();
 
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             while let Some(status) = status_rx.next().await {
-                this.update(&mut cx, |this, cx| {
+                this.update(cx, |this, cx| {
                     if this.client_status.is_none()
                         || this
                             .client_status
@@ -371,7 +371,7 @@ impl AssistantPanel {
                 })
                 .log_err();
             }
-            this.update(&mut cx, |this, _cx| this.watch_client_status = None)
+            this.update(cx, |this, _cx| this.watch_client_status = None)
                 .log_err();
         })
     }
@@ -576,11 +576,11 @@ impl AssistantPanel {
         if self.authenticate_provider_task.is_none() {
             self.authenticate_provider_task = Some((
                 provider.id(),
-                cx.spawn_in(window, |this, mut cx| async move {
+                cx.spawn_in(window, async move |this, cx| {
                     if let Some(future) = load_credentials {
                         let _ = future.await;
                     }
-                    this.update(&mut cx, |this, _cx| {
+                    this.update(cx, |this, _cx| {
                         this.authenticate_provider_task = None;
                     })
                     .log_err();
@@ -641,9 +641,9 @@ impl AssistantPanel {
             }
         } else {
             let assistant_panel = assistant_panel.downgrade();
-            cx.spawn_in(window, |workspace, mut cx| async move {
+            cx.spawn_in(window, async move |workspace, cx| {
                 let Some(task) =
-                    assistant_panel.update(&mut cx, |assistant, cx| assistant.authenticate(cx))?
+                    assistant_panel.update(cx, |assistant, cx| assistant.authenticate(cx))?
                 else {
                     let answer = cx
                         .prompt(
@@ -665,7 +665,7 @@ impl AssistantPanel {
                     return Ok(());
                 };
                 task.await?;
-                if assistant_panel.update(&mut cx, |panel, cx| panel.is_authenticated(cx))? {
+                if assistant_panel.update(cx, |panel, cx| panel.is_authenticated(cx))? {
                     cx.update(|window, cx| match inline_assist_target {
                         InlineAssistTarget::Editor(active_editor, include_context) => {
                             let assistant_panel = if include_context {
@@ -698,7 +698,7 @@ impl AssistantPanel {
                         }
                     })?
                 } else {
-                    workspace.update_in(&mut cx, |workspace, window, cx| {
+                    workspace.update_in(cx, |workspace, window, cx| {
                         workspace.focus_panel::<AssistantPanel>(window, cx)
                     })?;
                 }
@@ -791,10 +791,10 @@ impl AssistantPanel {
                 .context_store
                 .update(cx, |store, cx| store.create_remote_context(cx));
 
-            cx.spawn_in(window, |this, mut cx| async move {
+            cx.spawn_in(window, async move |this, cx| {
                 let context = task.await?;
 
-                this.update_in(&mut cx, |this, window, cx| {
+                this.update_in(cx, |this, window, cx| {
                     let workspace = this.workspace.clone();
                     let project = this.project.clone();
                     let lsp_adapter_delegate =
@@ -847,9 +847,9 @@ impl AssistantPanel {
 
             self.show_context(editor.clone(), window, cx);
             let workspace = self.workspace.clone();
-            cx.spawn_in(window, move |_, mut cx| async move {
+            cx.spawn_in(window, async move |_, cx| {
                 workspace
-                    .update_in(&mut cx, |workspace, window, cx| {
+                    .update_in(cx, |workspace, window, cx| {
                         workspace.focus_panel::<AssistantPanel>(window, cx);
                     })
                     .ok();
@@ -1069,8 +1069,8 @@ impl AssistantPanel {
                 .filter(|editor| editor.read(cx).context().read(cx).path() == Some(&path))
         });
         if let Some(existing_context) = existing_context {
-            return cx.spawn_in(window, |this, mut cx| async move {
-                this.update_in(&mut cx, |this, window, cx| {
+            return cx.spawn_in(window, async move |this, cx| {
+                this.update_in(cx, |this, window, cx| {
                     this.show_context(existing_context, window, cx)
                 })
             });
@@ -1085,9 +1085,9 @@ impl AssistantPanel {
 
         let lsp_adapter_delegate = make_lsp_adapter_delegate(&project, cx).log_err().flatten();
 
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let context = context.await?;
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 let editor = cx.new(|cx| {
                     ContextEditor::for_context(
                         context,
@@ -1117,8 +1117,8 @@ impl AssistantPanel {
                 .filter(|editor| *editor.read(cx).context().read(cx).id() == id)
         });
         if let Some(existing_context) = existing_context {
-            return cx.spawn_in(window, |this, mut cx| async move {
-                this.update_in(&mut cx, |this, window, cx| {
+            return cx.spawn_in(window, async move |this, cx| {
+                this.update_in(cx, |this, window, cx| {
                     this.show_context(existing_context.clone(), window, cx)
                 })?;
                 Ok(existing_context)
@@ -1134,9 +1134,9 @@ impl AssistantPanel {
             .log_err()
             .flatten();
 
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let context = context.await?;
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 let editor = cx.new(|cx| {
                     ContextEditor::for_context(
                         context,

crates/assistant/src/inline_assistant.rs

@@ -1311,9 +1311,9 @@ impl EditorInlineAssists {
             assist_ids: Vec::new(),
             scroll_lock: None,
             highlight_updates: highlight_updates_tx,
-            _update_highlights: cx.spawn(|cx| {
+            _update_highlights: cx.spawn({
                 let editor = editor.downgrade();
-                async move {
+                async move |cx| {
                     while let Ok(()) = highlight_updates_rx.changed().await {
                         let editor = editor.upgrade().context("editor was dropped")?;
                         cx.update_global(|assistant: &mut InlineAssistant, cx| {
@@ -1850,7 +1850,7 @@ impl PromptEditor {
 
     fn count_tokens(&mut self, cx: &mut Context<Self>) {
         let assist_id = self.id;
-        self.pending_token_count = cx.spawn(|this, mut cx| async move {
+        self.pending_token_count = cx.spawn(async move |this, cx| {
             cx.background_executor().timer(Duration::from_secs(1)).await;
             let token_count = cx
                 .update_global(|inline_assistant: &mut InlineAssistant, cx| {
@@ -1862,7 +1862,7 @@ impl PromptEditor {
                 })??
                 .await?;
 
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 this.token_counts = Some(token_count);
                 cx.notify();
             })
@@ -2882,7 +2882,7 @@ impl CodegenAlternative {
                 let request = self.build_request(user_prompt, assistant_panel_context, cx)?;
                 self.request = Some(request.clone());
 
-                cx.spawn(|_, cx| async move { model.stream_completion_text(request, &cx).await })
+                cx.spawn(async move |_, cx| model.stream_completion_text(request, &cx).await)
                     .boxed_local()
             };
         self.handle_stream(telemetry_id, provider_id.to_string(), api_key, stream, cx);
@@ -2999,213 +2999,207 @@ impl CodegenAlternative {
         let completion = Arc::new(Mutex::new(String::new()));
         let completion_clone = completion.clone();
 
-        self.generation = cx.spawn(|codegen, mut cx| {
-            async move {
-                let stream = stream.await;
-                let message_id = stream
-                    .as_ref()
-                    .ok()
-                    .and_then(|stream| stream.message_id.clone());
-                let generate = async {
-                    let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
-                    let executor = cx.background_executor().clone();
-                    let message_id = message_id.clone();
-                    let line_based_stream_diff: Task<anyhow::Result<()>> =
-                        cx.background_spawn(async move {
-                            let mut response_latency = None;
-                            let request_start = Instant::now();
-                            let diff = async {
-                                let chunks = StripInvalidSpans::new(stream?.stream);
-                                futures::pin_mut!(chunks);
-                                let mut diff = StreamingDiff::new(selected_text.to_string());
-                                let mut line_diff = LineDiff::default();
+        self.generation = cx.spawn(async move |codegen, cx| {
+            let stream = stream.await;
+            let message_id = stream
+                .as_ref()
+                .ok()
+                .and_then(|stream| stream.message_id.clone());
+            let generate = async {
+                let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
+                let executor = cx.background_executor().clone();
+                let message_id = message_id.clone();
+                let line_based_stream_diff: Task<anyhow::Result<()>> =
+                    cx.background_spawn(async move {
+                        let mut response_latency = None;
+                        let request_start = Instant::now();
+                        let diff = async {
+                            let chunks = StripInvalidSpans::new(stream?.stream);
+                            futures::pin_mut!(chunks);
+                            let mut diff = StreamingDiff::new(selected_text.to_string());
+                            let mut line_diff = LineDiff::default();
 
-                                let mut new_text = String::new();
-                                let mut base_indent = None;
-                                let mut line_indent = None;
-                                let mut first_line = true;
+                            let mut new_text = String::new();
+                            let mut base_indent = None;
+                            let mut line_indent = None;
+                            let mut first_line = true;
 
-                                while let Some(chunk) = chunks.next().await {
-                                    if response_latency.is_none() {
-                                        response_latency = Some(request_start.elapsed());
-                                    }
-                                    let chunk = chunk?;
-                                    completion_clone.lock().push_str(&chunk);
+                            while let Some(chunk) = chunks.next().await {
+                                if response_latency.is_none() {
+                                    response_latency = Some(request_start.elapsed());
+                                }
+                                let chunk = chunk?;
+                                completion_clone.lock().push_str(&chunk);
 
-                                    let mut lines = chunk.split('\n').peekable();
-                                    while let Some(line) = lines.next() {
-                                        new_text.push_str(line);
-                                        if line_indent.is_none() {
-                                            if let Some(non_whitespace_ch_ix) =
-                                                new_text.find(|ch: char| !ch.is_whitespace())
-                                            {
-                                                line_indent = Some(non_whitespace_ch_ix);
-                                                base_indent = base_indent.or(line_indent);
+                                let mut lines = chunk.split('\n').peekable();
+                                while let Some(line) = lines.next() {
+                                    new_text.push_str(line);
+                                    if line_indent.is_none() {
+                                        if let Some(non_whitespace_ch_ix) =
+                                            new_text.find(|ch: char| !ch.is_whitespace())
+                                        {
+                                            line_indent = Some(non_whitespace_ch_ix);
+                                            base_indent = base_indent.or(line_indent);
 
-                                                let line_indent = line_indent.unwrap();
-                                                let base_indent = base_indent.unwrap();
-                                                let indent_delta =
-                                                    line_indent as i32 - base_indent as i32;
-                                                let mut corrected_indent_len = cmp::max(
-                                                    0,
-                                                    suggested_line_indent.len as i32 + indent_delta,
-                                                )
-                                                    as usize;
-                                                if first_line {
-                                                    corrected_indent_len = corrected_indent_len
-                                                        .saturating_sub(
-                                                            selection_start.column as usize,
-                                                        );
-                                                }
-
-                                                let indent_char = suggested_line_indent.char();
-                                                let mut indent_buffer = [0; 4];
-                                                let indent_str =
-                                                    indent_char.encode_utf8(&mut indent_buffer);
-                                                new_text.replace_range(
-                                                    ..line_indent,
-                                                    &indent_str.repeat(corrected_indent_len),
-                                                );
+                                            let line_indent = line_indent.unwrap();
+                                            let base_indent = base_indent.unwrap();
+                                            let indent_delta =
+                                                line_indent as i32 - base_indent as i32;
+                                            let mut corrected_indent_len = cmp::max(
+                                                0,
+                                                suggested_line_indent.len as i32 + indent_delta,
+                                            )
+                                                as usize;
+                                            if first_line {
+                                                corrected_indent_len = corrected_indent_len
+                                                    .saturating_sub(
+                                                        selection_start.column as usize,
+                                                    );
                                             }
-                                        }
 
-                                        if line_indent.is_some() {
-                                            let char_ops = diff.push_new(&new_text);
-                                            line_diff
-                                                .push_char_operations(&char_ops, &selected_text);
-                                            diff_tx
-                                                .send((char_ops, line_diff.line_operations()))
-                                                .await?;
+                                            let indent_char = suggested_line_indent.char();
+                                            let mut indent_buffer = [0; 4];
+                                            let indent_str =
+                                                indent_char.encode_utf8(&mut indent_buffer);
+                                            new_text.replace_range(
+                                                ..line_indent,
+                                                &indent_str.repeat(corrected_indent_len),
+                                            );
+                                        }
+                                    }
+
+                                    if line_indent.is_some() {
+                                        let char_ops = diff.push_new(&new_text);
+                                        line_diff.push_char_operations(&char_ops, &selected_text);
+                                        diff_tx
+                                            .send((char_ops, line_diff.line_operations()))
+                                            .await?;
+                                        new_text.clear();
+                                    }
+
+                                    if lines.peek().is_some() {
+                                        let char_ops = diff.push_new("\n");
+                                        line_diff.push_char_operations(&char_ops, &selected_text);
+                                        diff_tx
+                                            .send((char_ops, line_diff.line_operations()))
+                                            .await?;
+                                        if line_indent.is_none() {
+                                            // Don't write out the leading indentation in empty lines on the next line
+                                            // This is the case where the above if statement didn't clear the buffer
                                             new_text.clear();
                                         }
-
-                                        if lines.peek().is_some() {
-                                            let char_ops = diff.push_new("\n");
-                                            line_diff
-                                                .push_char_operations(&char_ops, &selected_text);
-                                            diff_tx
-                                                .send((char_ops, line_diff.line_operations()))
-                                                .await?;
-                                            if line_indent.is_none() {
-                                                // Don't write out the leading indentation in empty lines on the next line
-                                                // This is the case where the above if statement didn't clear the buffer
-                                                new_text.clear();
-                                            }
-                                            line_indent = None;
-                                            first_line = false;
-                                        }
+                                        line_indent = None;
+                                        first_line = false;
                                     }
                                 }
-
-                                let mut char_ops = diff.push_new(&new_text);
-                                char_ops.extend(diff.finish());
-                                line_diff.push_char_operations(&char_ops, &selected_text);
-                                line_diff.finish(&selected_text);
-                                diff_tx
-                                    .send((char_ops, line_diff.line_operations()))
-                                    .await?;
-
-                                anyhow::Ok(())
-                            };
-
-                            let result = diff.await;
-
-                            let error_message =
-                                result.as_ref().err().map(|error| error.to_string());
-                            report_assistant_event(
-                                AssistantEvent {
-                                    conversation_id: None,
-                                    message_id,
-                                    kind: AssistantKind::Inline,
-                                    phase: AssistantPhase::Response,
-                                    model: model_telemetry_id,
-                                    model_provider: model_provider_id.to_string(),
-                                    response_latency,
-                                    error_message,
-                                    language_name: language_name.map(|name| name.to_proto()),
-                                },
-                                telemetry,
-                                http_client,
-                                model_api_key,
-                                &executor,
-                            );
-
-                            result?;
-                            Ok(())
-                        });
-
-                    while let Some((char_ops, line_ops)) = diff_rx.next().await {
-                        codegen.update(&mut cx, |codegen, cx| {
-                            codegen.last_equal_ranges.clear();
-
-                            let edits = char_ops
-                                .into_iter()
-                                .filter_map(|operation| match operation {
-                                    CharOperation::Insert { text } => {
-                                        let edit_start = snapshot.anchor_after(edit_start);
-                                        Some((edit_start..edit_start, text))
-                                    }
-                                    CharOperation::Delete { bytes } => {
-                                        let edit_end = edit_start + bytes;
-                                        let edit_range = snapshot.anchor_after(edit_start)
-                                            ..snapshot.anchor_before(edit_end);
-                                        edit_start = edit_end;
-                                        Some((edit_range, String::new()))
-                                    }
-                                    CharOperation::Keep { bytes } => {
-                                        let edit_end = edit_start + bytes;
-                                        let edit_range = snapshot.anchor_after(edit_start)
-                                            ..snapshot.anchor_before(edit_end);
-                                        edit_start = edit_end;
-                                        codegen.last_equal_ranges.push(edit_range);
-                                        None
-                                    }
-                                })
-                                .collect::<Vec<_>>();
-
-                            if codegen.active {
-                                codegen.apply_edits(edits.iter().cloned(), cx);
-                                codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
                             }
-                            codegen.edits.extend(edits);
-                            codegen.line_operations = line_ops;
-                            codegen.edit_position = Some(snapshot.anchor_after(edit_start));
 
-                            cx.notify();
-                        })?;
-                    }
+                            let mut char_ops = diff.push_new(&new_text);
+                            char_ops.extend(diff.finish());
+                            line_diff.push_char_operations(&char_ops, &selected_text);
+                            line_diff.finish(&selected_text);
+                            diff_tx
+                                .send((char_ops, line_diff.line_operations()))
+                                .await?;
 
-                    // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
-                    // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
-                    // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
-                    let batch_diff_task =
-                        codegen.update(&mut cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
-                    let (line_based_stream_diff, ()) =
-                        join!(line_based_stream_diff, batch_diff_task);
-                    line_based_stream_diff?;
+                            anyhow::Ok(())
+                        };
 
-                    anyhow::Ok(())
-                };
+                        let result = diff.await;
 
-                let result = generate.await;
-                let elapsed_time = start_time.elapsed().as_secs_f64();
+                        let error_message = result.as_ref().err().map(|error| error.to_string());
+                        report_assistant_event(
+                            AssistantEvent {
+                                conversation_id: None,
+                                message_id,
+                                kind: AssistantKind::Inline,
+                                phase: AssistantPhase::Response,
+                                model: model_telemetry_id,
+                                model_provider: model_provider_id.to_string(),
+                                response_latency,
+                                error_message,
+                                language_name: language_name.map(|name| name.to_proto()),
+                            },
+                            telemetry,
+                            http_client,
+                            model_api_key,
+                            &executor,
+                        );
 
-                codegen
-                    .update(&mut cx, |this, cx| {
-                        this.message_id = message_id;
-                        this.last_equal_ranges.clear();
-                        if let Err(error) = result {
-                            this.status = CodegenStatus::Error(error);
-                        } else {
-                            this.status = CodegenStatus::Done;
+                        result?;
+                        Ok(())
+                    });
+
+                while let Some((char_ops, line_ops)) = diff_rx.next().await {
+                    codegen.update(cx, |codegen, cx| {
+                        codegen.last_equal_ranges.clear();
+
+                        let edits = char_ops
+                            .into_iter()
+                            .filter_map(|operation| match operation {
+                                CharOperation::Insert { text } => {
+                                    let edit_start = snapshot.anchor_after(edit_start);
+                                    Some((edit_start..edit_start, text))
+                                }
+                                CharOperation::Delete { bytes } => {
+                                    let edit_end = edit_start + bytes;
+                                    let edit_range = snapshot.anchor_after(edit_start)
+                                        ..snapshot.anchor_before(edit_end);
+                                    edit_start = edit_end;
+                                    Some((edit_range, String::new()))
+                                }
+                                CharOperation::Keep { bytes } => {
+                                    let edit_end = edit_start + bytes;
+                                    let edit_range = snapshot.anchor_after(edit_start)
+                                        ..snapshot.anchor_before(edit_end);
+                                    edit_start = edit_end;
+                                    codegen.last_equal_ranges.push(edit_range);
+                                    None
+                                }
+                            })
+                            .collect::<Vec<_>>();
+
+                        if codegen.active {
+                            codegen.apply_edits(edits.iter().cloned(), cx);
+                            codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
                         }
-                        this.elapsed_time = Some(elapsed_time);
-                        this.completion = Some(completion.lock().clone());
-                        cx.emit(CodegenEvent::Finished);
+                        codegen.edits.extend(edits);
+                        codegen.line_operations = line_ops;
+                        codegen.edit_position = Some(snapshot.anchor_after(edit_start));
+
                         cx.notify();
-                    })
-                    .ok();
-            }
+                    })?;
+                }
+
+                // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
+                // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
+                // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
+                let batch_diff_task =
+                    codegen.update(cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
+                let (line_based_stream_diff, ()) = join!(line_based_stream_diff, batch_diff_task);
+                line_based_stream_diff?;
+
+                anyhow::Ok(())
+            };
+
+            let result = generate.await;
+            let elapsed_time = start_time.elapsed().as_secs_f64();
+
+            codegen
+                .update(cx, |this, cx| {
+                    this.message_id = message_id;
+                    this.last_equal_ranges.clear();
+                    if let Err(error) = result {
+                        this.status = CodegenStatus::Error(error);
+                    } else {
+                        this.status = CodegenStatus::Done;
+                    }
+                    this.elapsed_time = Some(elapsed_time);
+                    this.completion = Some(completion.lock().clone());
+                    cx.emit(CodegenEvent::Finished);
+                    cx.notify();
+                })
+                .ok();
         });
         cx.notify();
     }
@@ -3323,7 +3317,7 @@ impl CodegenAlternative {
         let new_snapshot = self.buffer.read(cx).snapshot(cx);
         let new_range = self.range.to_point(&new_snapshot);
 
-        cx.spawn(|codegen, mut cx| async move {
+        cx.spawn(async move |codegen, cx| {
             let (deleted_row_ranges, inserted_row_ranges) = cx
                 .background_spawn(async move {
                     let old_text = old_snapshot
@@ -3373,7 +3367,7 @@ impl CodegenAlternative {
                 .await;
 
             codegen
-                .update(&mut cx, |codegen, cx| {
+                .update(cx, |codegen, cx| {
                     codegen.diff.deleted_row_ranges = deleted_row_ranges;
                     codegen.diff.inserted_row_ranges = inserted_row_ranges;
                     cx.notify();
@@ -3569,6 +3563,7 @@ impl CodeActionProvider for AssistantCodeActionProvider {
                     title: "Fix with Assistant".into(),
                     ..Default::default()
                 })),
+                resolved: true,
             }]))
         } else {
             Task::ready(Ok(Vec::new()))
@@ -3586,10 +3581,10 @@ impl CodeActionProvider for AssistantCodeActionProvider {
     ) -> Task<Result<ProjectTransaction>> {
         let editor = self.editor.clone();
         let workspace = self.workspace.clone();
-        window.spawn(cx, |mut cx| async move {
+        window.spawn(cx, async move |cx| {
             let editor = editor.upgrade().context("editor was released")?;
             let range = editor
-                .update(&mut cx, |editor, cx| {
+                .update(cx, |editor, cx| {
                     editor.buffer().update(cx, |multibuffer, cx| {
                         let buffer = buffer.read(cx);
                         let multibuffer_snapshot = multibuffer.read(cx);
@@ -3624,7 +3619,7 @@ impl CodeActionProvider for AssistantCodeActionProvider {
                     })
                 })?
                 .context("invalid range")?;
-            let assistant_panel = workspace.update(&mut cx, |workspace, cx| {
+            let assistant_panel = workspace.update(cx, |workspace, cx| {
                 workspace
                     .panel::<AssistantPanel>(cx)
                     .context("assistant panel was released")

crates/assistant/src/terminal_inline_assistant.rs

@@ -825,7 +825,7 @@ impl PromptEditor {
         let Some(model) = LanguageModelRegistry::read_global(cx).active_model() else {
             return;
         };
-        self.pending_token_count = cx.spawn(|this, mut cx| async move {
+        self.pending_token_count = cx.spawn(async move |this, cx| {
             cx.background_executor().timer(Duration::from_secs(1)).await;
             let request =
                 cx.update_global(|inline_assistant: &mut TerminalInlineAssistant, cx| {
@@ -833,7 +833,7 @@ impl PromptEditor {
                 })??;
 
             let token_count = cx.update(|cx| model.count_tokens(request, cx))?.await?;
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 this.token_count = Some(token_count);
                 cx.notify();
             })
@@ -1140,7 +1140,7 @@ impl Codegen {
         let telemetry = self.telemetry.clone();
         self.status = CodegenStatus::Pending;
         self.transaction = Some(TerminalTransaction::start(self.terminal.clone()));
-        self.generation = cx.spawn(|this, mut cx| async move {
+        self.generation = cx.spawn(async move |this, cx| {
             let model_telemetry_id = model.telemetry_id();
             let model_provider_id = model.provider_id();
             let response = model.stream_completion_text(prompt, &cx).await;
@@ -1197,12 +1197,12 @@ impl Codegen {
                     }
                 });
 
-                this.update(&mut cx, |this, _| {
+                this.update(cx, |this, _| {
                     this.message_id = message_id;
                 })?;
 
                 while let Some(hunk) = hunks_rx.next().await {
-                    this.update(&mut cx, |this, cx| {
+                    this.update(cx, |this, cx| {
                         if let Some(transaction) = &mut this.transaction {
                             transaction.push(hunk, cx);
                             cx.notify();
@@ -1216,7 +1216,7 @@ impl Codegen {
 
             let result = generate.await;
 
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 if let Err(error) = result {
                     this.status = CodegenStatus::Error(error);
                 } else {

crates/assistant2/Cargo.toml

@@ -39,6 +39,7 @@ fs.workspace = true
 futures.workspace = true
 fuzzy.workspace = true
 git.workspace = true
+git_ui.workspace = true
 gpui.workspace = true
 heed.workspace = true
 html_to_markdown.workspace = true

crates/assistant2/src/active_thread.rs

@@ -1,14 +1,16 @@
-use crate::thread::{MessageId, RequestKind, Thread, ThreadError, ThreadEvent};
+use crate::thread::{
+    LastRestoreCheckpoint, MessageId, RequestKind, Thread, ThreadError, ThreadEvent,
+};
 use crate::thread_store::ThreadStore;
 use crate::tool_use::{ToolUse, ToolUseStatus};
 use crate::ui::ContextPill;
 use collections::HashMap;
 use editor::{Editor, MultiBuffer};
 use gpui::{
-    list, percentage, AbsoluteLength, Animation, AnimationExt, AnyElement, App, ClickEvent,
-    DefiniteLength, EdgesRefinement, Empty, Entity, Focusable, Length, ListAlignment, ListOffset,
-    ListState, StyleRefinement, Subscription, Task, TextStyleRefinement, Transformation,
-    UnderlineStyle,
+    list, percentage, pulsating_between, AbsoluteLength, Animation, AnimationExt, AnyElement, App,
+    ClickEvent, DefiniteLength, EdgesRefinement, Empty, Entity, Focusable, Length, ListAlignment,
+    ListOffset, ListState, StyleRefinement, Subscription, Task, TextStyleRefinement,
+    Transformation, UnderlineStyle, WeakEntity,
 };
 use language::{Buffer, LanguageRegistry};
 use language_model::{LanguageModelRegistry, LanguageModelToolUseId, Role};
@@ -18,19 +20,24 @@ use settings::Settings as _;
 use std::sync::Arc;
 use std::time::Duration;
 use theme::ThemeSettings;
-use ui::Color;
-use ui::{prelude::*, Disclosure, KeyBinding};
+use ui::{prelude::*, Disclosure, KeyBinding, Tooltip};
 use util::ResultExt as _;
+use workspace::{OpenOptions, Workspace};
+
+use crate::context_store::{refresh_context_store_text, ContextStore};
 
 pub struct ActiveThread {
     language_registry: Arc<LanguageRegistry>,
     thread_store: Entity<ThreadStore>,
     thread: Entity<Thread>,
+    context_store: Entity<ContextStore>,
+    workspace: WeakEntity<Workspace>,
     save_thread_task: Option<Task<()>>,
     messages: Vec<MessageId>,
     list_state: ListState,
     rendered_messages_by_id: HashMap<MessageId, Entity<Markdown>>,
     rendered_scripting_tool_uses: HashMap<LanguageModelToolUseId, Entity<Markdown>>,
+    rendered_tool_use_labels: HashMap<LanguageModelToolUseId, Entity<Markdown>>,
     editing_message: Option<(MessageId, EditMessageState)>,
     expanded_tool_uses: HashMap<LanguageModelToolUseId, bool>,
     last_error: Option<ThreadError>,
@@ -46,6 +53,8 @@ impl ActiveThread {
         thread: Entity<Thread>,
         thread_store: Entity<ThreadStore>,
         language_registry: Arc<LanguageRegistry>,
+        context_store: Entity<ContextStore>,
+        workspace: WeakEntity<Workspace>,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Self {
@@ -58,10 +67,13 @@ impl ActiveThread {
             language_registry,
             thread_store,
             thread: thread.clone(),
+            context_store,
+            workspace,
             save_thread_task: None,
             messages: Vec::new(),
             rendered_messages_by_id: HashMap::default(),
             rendered_scripting_tool_uses: HashMap::default(),
+            rendered_tool_use_labels: HashMap::default(),
             expanded_tool_uses: HashMap::default(),
             list_state: ListState::new(0, ListAlignment::Bottom, px(1024.), {
                 let this = cx.entity().downgrade();
@@ -78,10 +90,29 @@ impl ActiveThread {
         for message in thread.read(cx).messages().cloned().collect::<Vec<_>>() {
             this.push_message(&message.id, message.text.clone(), window, cx);
 
-            for tool_use in thread.read(cx).scripting_tool_uses_for_message(message.id) {
+            for tool_use in thread.read(cx).tool_uses_for_message(message.id, cx) {
+                this.render_tool_use_label_markdown(
+                    tool_use.id.clone(),
+                    tool_use.ui_text.clone(),
+                    window,
+                    cx,
+                );
+            }
+
+            for tool_use in thread
+                .read(cx)
+                .scripting_tool_uses_for_message(message.id, cx)
+            {
+                this.render_tool_use_label_markdown(
+                    tool_use.id.clone(),
+                    tool_use.ui_text.clone(),
+                    window,
+                    cx,
+                );
+
                 this.render_scripting_tool_use_markdown(
                     tool_use.id.clone(),
-                    tool_use.name.as_ref(),
+                    tool_use.ui_text.as_ref(),
                     tool_use.input.clone(),
                     window,
                     cx,
@@ -111,7 +142,7 @@ impl ActiveThread {
     pub fn cancel_last_completion(&mut self, cx: &mut App) -> bool {
         self.last_error.take();
         self.thread
-            .update(cx, |thread, _cx| thread.cancel_last_completion())
+            .update(cx, |thread, cx| thread.cancel_last_completion(cx))
     }
 
     pub fn last_error(&self) -> Option<ThreadError> {
@@ -279,6 +310,19 @@ impl ActiveThread {
             .insert(tool_use_id, lua_script);
     }
 
+    fn render_tool_use_label_markdown(
+        &mut self,
+        tool_use_id: LanguageModelToolUseId,
+        tool_label: impl Into<SharedString>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        self.rendered_tool_use_labels.insert(
+            tool_use_id,
+            self.render_markdown(tool_label.into(), window, cx),
+        );
+    }
+
     fn handle_thread_event(
         &mut self,
         _thread: &Entity<Thread>,
@@ -293,6 +337,7 @@ impl ActiveThread {
             ThreadEvent::StreamedCompletion | ThreadEvent::SummaryChanged => {
                 self.save_thread(cx);
             }
+            ThreadEvent::DoneStreaming => {}
             ThreadEvent::StreamedAssistantText(message_id, text) => {
                 if let Some(markdown) = self.rendered_messages_by_id.get_mut(&message_id) {
                     markdown.update(cx, |markdown, cx| {
@@ -332,14 +377,32 @@ impl ActiveThread {
                 cx.notify();
             }
             ThreadEvent::UsePendingTools => {
-                self.thread.update(cx, |thread, cx| {
-                    thread.use_pending_tools(cx);
-                });
+                let tool_uses = self
+                    .thread
+                    .update(cx, |thread, cx| thread.use_pending_tools(cx));
+
+                for tool_use in tool_uses {
+                    self.render_tool_use_label_markdown(
+                        tool_use.id,
+                        tool_use.ui_text.clone(),
+                        window,
+                        cx,
+                    );
+                }
             }
             ThreadEvent::ToolFinished {
-                pending_tool_use, ..
+                pending_tool_use,
+                canceled,
+                ..
             } => {
+                let canceled = *canceled;
                 if let Some(tool_use) = pending_tool_use {
+                    self.render_tool_use_label_markdown(
+                        tool_use.id.clone(),
+                        SharedString::from(tool_use.ui_text.clone()),
+                        window,
+                        cx,
+                    );
                     self.render_scripting_tool_use_markdown(
                         tool_use.id.clone(),
                         tool_use.name.as_ref(),
@@ -350,14 +413,58 @@ impl ActiveThread {
                 }
 
                 if self.thread.read(cx).all_tools_finished() {
+                    let pending_refresh_buffers = self.thread.update(cx, |thread, cx| {
+                        thread.action_log().update(cx, |action_log, _cx| {
+                            action_log.take_stale_buffers_in_context()
+                        })
+                    });
+
+                    let context_update_task = if !pending_refresh_buffers.is_empty() {
+                        let refresh_task = refresh_context_store_text(
+                            self.context_store.clone(),
+                            &pending_refresh_buffers,
+                            cx,
+                        );
+
+                        cx.spawn(async move |this, cx| {
+                            let updated_context_ids = refresh_task.await;
+
+                            this.update(cx, |this, cx| {
+                                this.context_store.read_with(cx, |context_store, cx| {
+                                    context_store
+                                        .context()
+                                        .iter()
+                                        .filter(|context| {
+                                            updated_context_ids.contains(&context.id())
+                                        })
+                                        .flat_map(|context| context.snapshot(cx))
+                                        .collect()
+                                })
+                            })
+                        })
+                    } else {
+                        Task::ready(anyhow::Ok(Vec::new()))
+                    };
+
                     let model_registry = LanguageModelRegistry::read_global(cx);
                     if let Some(model) = model_registry.active_model() {
-                        self.thread.update(cx, |thread, cx| {
-                            thread.send_tool_results_to_model(model, cx);
-                        });
+                        cx.spawn(async move |this, cx| {
+                            let updated_context = context_update_task.await?;
+
+                            this.update(cx, |this, cx| {
+                                this.thread.update(cx, |thread, cx| {
+                                    thread.attach_tool_results(updated_context, cx);
+                                    if !canceled {
+                                        thread.send_to_model(model, RequestKind::Chat, cx);
+                                    }
+                                });
+                            })
+                        })
+                        .detach();
                     }
                 }
             }
+            ThreadEvent::CheckpointChanged => cx.notify(),
         }
     }
 
@@ -366,9 +473,9 @@ impl ActiveThread {
     /// Only one task to save the thread will be in flight at a time.
     fn save_thread(&mut self, cx: &mut Context<Self>) {
         let thread = self.thread.clone();
-        self.save_thread_task = Some(cx.spawn(|this, mut cx| async move {
+        self.save_thread_task = Some(cx.spawn(async move |this, cx| {
             let task = this
-                .update(&mut cx, |this, cx| {
+                .update(cx, |this, cx| {
                     this.thread_store
                         .update(cx, |thread_store, cx| thread_store.save_thread(&thread, cx))
                 })
@@ -498,9 +605,10 @@ impl ActiveThread {
 
         let thread = self.thread.read(cx);
         // Get all the data we need from thread before we start using it in closures
+        let checkpoint = thread.checkpoint_for_message(message_id);
         let context = thread.context_for_message(message_id);
-        let tool_uses = thread.tool_uses_for_message(message_id);
-        let scripting_tool_uses = thread.scripting_tool_uses_for_message(message_id);
+        let tool_uses = thread.tool_uses_for_message(message_id, cx);
+        let scripting_tool_uses = thread.scripting_tool_uses_for_message(message_id, cx);
 
         // Don't render user messages that are just there for returning tool results.
         if message.role == Role::User
@@ -531,7 +639,7 @@ impl ActiveThread {
                         .p_2p5()
                         .child(edit_message_editor)
                 } else {
-                    div().p_2p5().text_ui(cx).child(markdown.clone())
+                    div().text_ui(cx).child(markdown.clone())
                 },
             )
             .when_some(context, |parent, context| {
@@ -551,15 +659,16 @@ impl ActiveThread {
         let styled_message = match message.role {
             Role::User => v_flex()
                 .id(("message-container", ix))
-                .pt_2p5()
-                .px_2p5()
+                .pt_2()
+                .pl_2()
+                .pr_2p5()
                 .child(
                     v_flex()
                         .bg(colors.editor_background)
                         .rounded_lg()
                         .border_1()
                         .border_color(colors.border)
-                        .shadow_sm()
+                        .shadow_md()
                         .child(
                             h_flex()
                                 .py_1()
@@ -650,38 +759,97 @@ impl ActiveThread {
                                     },
                                 ),
                         )
-                        .child(message_content),
+                        .child(div().p_2().child(message_content)),
+                ),
+            Role::Assistant => v_flex()
+                .id(("message-container", ix))
+                .child(div().py_3().px_4().child(message_content))
+                .when(
+                    !tool_uses.is_empty() || !scripting_tool_uses.is_empty(),
+                    |parent| {
+                        parent.child(
+                            v_flex()
+                                .children(
+                                    tool_uses
+                                        .into_iter()
+                                        .map(|tool_use| self.render_tool_use(tool_use, cx)),
+                                )
+                                .children(scripting_tool_uses.into_iter().map(|tool_use| {
+                                    self.render_scripting_tool_use(tool_use, window, cx)
+                                })),
+                        )
+                    },
                 ),
-            Role::Assistant => {
-                v_flex()
-                    .id(("message-container", ix))
-                    .child(message_content)
-                    .when(
-                        !tool_uses.is_empty() || !scripting_tool_uses.is_empty(),
-                        |parent| {
-                            parent.child(
-                                v_flex()
-                                    .children(
-                                        tool_uses
-                                            .into_iter()
-                                            .map(|tool_use| self.render_tool_use(tool_use, cx)),
-                                    )
-                                    .children(scripting_tool_uses.into_iter().map(|tool_use| {
-                                        self.render_scripting_tool_use(tool_use, cx)
-                                    })),
-                            )
-                        },
-                    )
-            }
             Role::System => div().id(("message-container", ix)).py_1().px_2().child(
                 v_flex()
                     .bg(colors.editor_background)
                     .rounded_sm()
-                    .child(message_content),
+                    .child(div().p_4().child(message_content)),
             ),
         };
 
-        styled_message.into_any()
+        v_flex()
+            .when(ix == 0, |parent| parent.child(self.render_rules_item(cx)))
+            .when_some(checkpoint, |parent, checkpoint| {
+                let mut is_pending = false;
+                let mut error = None;
+                if let Some(last_restore_checkpoint) =
+                    self.thread.read(cx).last_restore_checkpoint()
+                {
+                    if last_restore_checkpoint.message_id() == message_id {
+                        match last_restore_checkpoint {
+                            LastRestoreCheckpoint::Pending { .. } => is_pending = true,
+                            LastRestoreCheckpoint::Error { error: err, .. } => {
+                                error = Some(err.clone());
+                            }
+                        }
+                    }
+                }
+
+                let restore_checkpoint_button =
+                    Button::new(("restore-checkpoint", ix), "Restore Checkpoint")
+                        .icon(if error.is_some() {
+                            IconName::XCircle
+                        } else {
+                            IconName::Undo
+                        })
+                        .size(ButtonSize::Compact)
+                        .disabled(is_pending)
+                        .icon_color(if error.is_some() {
+                            Some(Color::Error)
+                        } else {
+                            None
+                        })
+                        .on_click(cx.listener(move |this, _, _window, cx| {
+                            this.thread.update(cx, |thread, cx| {
+                                thread
+                                    .restore_checkpoint(checkpoint.clone(), cx)
+                                    .detach_and_log_err(cx);
+                            });
+                        }));
+
+                let restore_checkpoint_button = if is_pending {
+                    restore_checkpoint_button
+                        .with_animation(
+                            ("pulsating-restore-checkpoint-button", ix),
+                            Animation::new(Duration::from_secs(2))
+                                .repeat()
+                                .with_easing(pulsating_between(0.6, 1.)),
+                            |label, delta| label.alpha(delta),
+                        )
+                        .into_any_element()
+                } else if let Some(error) = error {
+                    restore_checkpoint_button
+                        .tooltip(Tooltip::text(error.to_string()))
+                        .into_any_element()
+                } else {
+                    restore_checkpoint_button.into_any_element()
+                };
+
+                parent.child(h_flex().pl_2().child(restore_checkpoint_button))
+            })
+            .child(styled_message)
+            .into_any()
     }
 
     fn render_tool_use(&self, tool_use: ToolUse, cx: &mut Context<Self>) -> impl IntoElement {
@@ -693,7 +861,7 @@ impl ActiveThread {
 
         let lighter_border = cx.theme().colors().border.opacity(0.5);
 
-        div().px_2p5().child(
+        div().px_4().child(
             v_flex()
                 .rounded_lg()
                 .border_1()
@@ -729,11 +897,10 @@ impl ActiveThread {
                                         }
                                     }),
                                 ))
-                                .child(
-                                    Label::new(tool_use.name)
-                                        .size(LabelSize::Small)
-                                        .buffer_font(cx),
-                                ),
+                                .child(div().text_ui_sm(cx).children(
+                                    self.rendered_tool_use_labels.get(&tool_use.id).cloned(),
+                                ))
+                                .truncate(),
                         )
                         .child({
                             let (icon_name, color, animated) = match &tool_use.status {
@@ -861,6 +1028,7 @@ impl ActiveThread {
     fn render_scripting_tool_use(
         &self,
         tool_use: ToolUse,
+        window: &Window,
         cx: &mut Context<Self>,
     ) -> impl IntoElement {
         let is_open = self
@@ -906,7 +1074,12 @@ impl ActiveThread {
                                         }
                                     }),
                                 ))
-                                .child(Label::new(tool_use.name)),
+                                .child(div().text_ui_sm(cx).child(self.render_markdown(
+                                    tool_use.ui_text.clone(),
+                                    window,
+                                    cx,
+                                )))
+                                .truncate(),
                         )
                         .child(
                             Label::new(match tool_use.status {
@@ -970,6 +1143,86 @@ impl ActiveThread {
                 }),
         )
     }
+
+    fn render_rules_item(&self, cx: &Context<Self>) -> AnyElement {
+        let Some(system_prompt_context) = self.thread.read(cx).system_prompt_context().as_ref()
+        else {
+            return div().into_any();
+        };
+
+        let rules_files = system_prompt_context
+            .worktrees
+            .iter()
+            .filter_map(|worktree| worktree.rules_file.as_ref())
+            .collect::<Vec<_>>();
+
+        let label_text = match rules_files.as_slice() {
+            &[] => return div().into_any(),
+            &[rules_file] => {
+                format!("Using {:?} file", rules_file.rel_path)
+            }
+            rules_files => {
+                format!("Using {} rules files", rules_files.len())
+            }
+        };
+
+        div()
+            .pt_1()
+            .px_2p5()
+            .child(
+                h_flex()
+                    .group("rules-item")
+                    .w_full()
+                    .gap_2()
+                    .justify_between()
+                    .child(
+                        h_flex()
+                            .gap_1p5()
+                            .child(
+                                Icon::new(IconName::File)
+                                    .size(IconSize::XSmall)
+                                    .color(Color::Disabled),
+                            )
+                            .child(
+                                Label::new(label_text)
+                                    .size(LabelSize::XSmall)
+                                    .color(Color::Muted)
+                                    .buffer_font(cx),
+                            ),
+                    )
+                    .child(
+                        div().visible_on_hover("rules-item").child(
+                            Button::new("open-rules", "Open Rules")
+                                .label_size(LabelSize::XSmall)
+                                .on_click(cx.listener(Self::handle_open_rules)),
+                        ),
+                    ),
+            )
+            .into_any()
+    }
+
+    fn handle_open_rules(&mut self, _: &ClickEvent, window: &mut Window, cx: &mut Context<Self>) {
+        let Some(system_prompt_context) = self.thread.read(cx).system_prompt_context().as_ref()
+        else {
+            return;
+        };
+
+        let abs_paths = system_prompt_context
+            .worktrees
+            .iter()
+            .flat_map(|worktree| worktree.rules_file.as_ref())
+            .map(|rules_file| rules_file.abs_path.to_path_buf())
+            .collect::<Vec<_>>();
+
+        if let Ok(task) = self.workspace.update(cx, move |workspace, cx| {
+            // TODO: Open a multibuffer instead? In some cases this doesn't make the set of rules
+            // files clear. For example, if rules file 1 is already open but rules file 2 is not,
+            // this would open and focus rules file 2 in a tab that is not next to rules file 1.
+            workspace.open_paths(abs_paths, OpenOptions::default(), None, window, cx)
+        }) {
+            task.detach();
+        }
+    }
 }
 
 impl Render for ActiveThread {

crates/assistant2/src/assistant.rs

@@ -31,8 +31,11 @@ use gpui::{actions, App};
 use prompt_store::PromptBuilder;
 use settings::Settings as _;
 
+pub use crate::active_thread::ActiveThread;
 pub use crate::assistant_panel::{AssistantPanel, ConcreteAssistantPanelDelegate};
 pub use crate::inline_assistant::InlineAssistant;
+pub use crate::thread::{Message, RequestKind, Thread, ThreadEvent};
+pub use crate::thread_store::ThreadStore;
 
 actions!(
     assistant2,

crates/assistant2/src/assistant_configuration.rs

@@ -1,19 +1,33 @@
 use std::sync::Arc;
 
+use assistant_tool::{ToolSource, ToolWorkingSet};
 use collections::HashMap;
-use gpui::{Action, AnyView, App, EventEmitter, FocusHandle, Focusable, Subscription};
+use context_server::manager::ContextServerManager;
+use gpui::{Action, AnyView, App, Entity, EventEmitter, FocusHandle, Focusable, Subscription};
 use language_model::{LanguageModelProvider, LanguageModelProviderId, LanguageModelRegistry};
-use ui::{prelude::*, Divider, DividerColor, ElevationIndex};
+use ui::{
+    prelude::*, Disclosure, Divider, DividerColor, ElevationIndex, Indicator, Switch, Tooltip,
+};
+use util::ResultExt as _;
 use zed_actions::assistant::DeployPromptLibrary;
+use zed_actions::ExtensionCategoryFilter;
 
 pub struct AssistantConfiguration {
     focus_handle: FocusHandle,
     configuration_views_by_provider: HashMap<LanguageModelProviderId, AnyView>,
+    context_server_manager: Entity<ContextServerManager>,
+    expanded_context_server_tools: HashMap<Arc<str>, bool>,
+    tools: Arc<ToolWorkingSet>,
     _registry_subscription: Subscription,
 }
 
 impl AssistantConfiguration {
-    pub fn new(window: &mut Window, cx: &mut Context<Self>) -> Self {
+    pub fn new(
+        context_server_manager: Entity<ContextServerManager>,
+        tools: Arc<ToolWorkingSet>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) -> Self {
         let focus_handle = cx.focus_handle();
 
         let registry_subscription = cx.subscribe_in(
@@ -36,6 +50,9 @@ impl AssistantConfiguration {
         let mut this = Self {
             focus_handle,
             configuration_views_by_provider: HashMap::default(),
+            context_server_manager,
+            expanded_context_server_tools: HashMap::default(),
+            tools,
             _registry_subscription: registry_subscription,
         };
         this.build_provider_configuration_views(window, cx);
@@ -143,6 +160,186 @@ impl AssistantConfiguration {
                     }),
             )
     }
+
+    fn render_context_servers_section(&mut self, cx: &mut Context<Self>) -> impl IntoElement {
+        let context_servers = self.context_server_manager.read(cx).all_servers().clone();
+        let tools_by_source = self.tools.tools_by_source(cx);
+        let empty = Vec::new();
+
+        const SUBHEADING: &str = "Connect to context servers via the Model Context Protocol either via Zed extensions or directly.";
+
+        v_flex()
+            .p(DynamicSpacing::Base16.rems(cx))
+            .mt_1()
+            .gap_2()
+            .flex_1()
+            .child(
+                v_flex()
+                    .gap_0p5()
+                    .child(Headline::new("Context Servers (MCP)").size(HeadlineSize::Small))
+                    .child(Label::new(SUBHEADING).color(Color::Muted)),
+            )
+            .children(context_servers.into_iter().map(|context_server| {
+                let is_running = context_server.client().is_some();
+                let are_tools_expanded = self
+                    .expanded_context_server_tools
+                    .get(&context_server.id())
+                    .copied()
+                    .unwrap_or_default();
+
+                let tools = tools_by_source
+                    .get(&ToolSource::ContextServer {
+                        id: context_server.id().into(),
+                    })
+                    .unwrap_or_else(|| &empty);
+                let tool_count = tools.len();
+
+                v_flex()
+                    .id(SharedString::from(context_server.id()))
+                    .border_1()
+                    .rounded_sm()
+                    .border_color(cx.theme().colors().border)
+                    .bg(cx.theme().colors().editor_background)
+                    .child(
+                        h_flex()
+                            .justify_between()
+                            .px_2()
+                            .py_1()
+                            .when(are_tools_expanded, |element| {
+                                element
+                                    .border_b_1()
+                                    .border_color(cx.theme().colors().border)
+                            })
+                            .child(
+                                h_flex()
+                                    .gap_2()
+                                    .child(
+                                        Disclosure::new("tool-list-disclosure", are_tools_expanded)
+                                            .on_click(cx.listener({
+                                                let context_server_id = context_server.id();
+                                                move |this, _event, _window, _cx| {
+                                                    let is_open = this
+                                                        .expanded_context_server_tools
+                                                        .entry(context_server_id.clone())
+                                                        .or_insert(false);
+
+                                                    *is_open = !*is_open;
+                                                }
+                                            })),
+                                    )
+                                    .child(Indicator::dot().color(if is_running {
+                                        Color::Success
+                                    } else {
+                                        Color::Error
+                                    }))
+                                    .child(Label::new(context_server.id()))
+                                    .child(
+                                        Label::new(format!("{tool_count} tools"))
+                                            .color(Color::Muted),
+                                    ),
+                            )
+                            .child(h_flex().child(
+                                Switch::new("context-server-switch", is_running.into()).on_click({
+                                    let context_server_manager =
+                                        self.context_server_manager.clone();
+                                    let context_server = context_server.clone();
+                                    move |state, _window, cx| match state {
+                                        ToggleState::Unselected | ToggleState::Indeterminate => {
+                                            context_server_manager.update(cx, |this, cx| {
+                                                this.stop_server(context_server.clone(), cx)
+                                                    .log_err();
+                                            });
+                                        }
+                                        ToggleState::Selected => {
+                                            cx.spawn({
+                                                let context_server_manager =
+                                                    context_server_manager.clone();
+                                                let context_server = context_server.clone();
+                                                async move |cx| {
+                                                    if let Some(start_server_task) =
+                                                        context_server_manager
+                                                            .update(cx, |this, cx| {
+                                                                this.start_server(
+                                                                    context_server,
+                                                                    cx,
+                                                                )
+                                                            })
+                                                            .log_err()
+                                                    {
+                                                        start_server_task.await.log_err();
+                                                    }
+                                                }
+                                            })
+                                            .detach();
+                                        }
+                                    }
+                                }),
+                            )),
+                    )
+                    .map(|parent| {
+                        if !are_tools_expanded {
+                            return parent;
+                        }
+
+                        parent.child(v_flex().children(tools.into_iter().enumerate().map(
+                            |(ix, tool)| {
+                                h_flex()
+                                    .px_2()
+                                    .py_1()
+                                    .when(ix < tool_count - 1, |element| {
+                                        element
+                                            .border_b_1()
+                                            .border_color(cx.theme().colors().border)
+                                    })
+                                    .child(Label::new(tool.name()))
+                            },
+                        )))
+                    })
+            }))
+            .child(
+                h_flex()
+                    .justify_between()
+                    .gap_2()
+                    .child(
+                        h_flex().w_full().child(
+                            Button::new("add-context-server", "Add Context Server")
+                                .style(ButtonStyle::Filled)
+                                .layer(ElevationIndex::ModalSurface)
+                                .full_width()
+                                .icon(IconName::Plus)
+                                .icon_size(IconSize::Small)
+                                .icon_position(IconPosition::Start)
+                                .disabled(true)
+                                .tooltip(Tooltip::text("Not yet implemented")),
+                        ),
+                    )
+                    .child(
+                        h_flex().w_full().child(
+                            Button::new(
+                                "install-context-server-extensions",
+                                "Install Context Server Extensions",
+                            )
+                            .style(ButtonStyle::Filled)
+                            .layer(ElevationIndex::ModalSurface)
+                            .full_width()
+                            .icon(IconName::DatabaseZap)
+                            .icon_size(IconSize::Small)
+                            .icon_position(IconPosition::Start)
+                            .on_click(|_event, window, cx| {
+                                window.dispatch_action(
+                                    zed_actions::Extensions {
+                                        category_filter: Some(
+                                            ExtensionCategoryFilter::ContextServers,
+                                        ),
+                                    }
+                                    .boxed_clone(),
+                                    cx,
+                                )
+                            }),
+                        ),
+                    ),
+            )
+    }
 }
 
 impl Render for AssistantConfiguration {
@@ -182,6 +379,8 @@ impl Render for AssistantConfiguration {
                     ),
             )
             .child(Divider::horizontal().color(DividerColor::Border))
+            .child(self.render_context_servers_section(cx))
+            .child(Divider::horizontal().color(DividerColor::Border))
             .child(
                 v_flex()
                     .p(DynamicSpacing::Base16.rems(cx))

crates/assistant2/src/assistant_panel.rs

@@ -110,19 +110,16 @@ impl AssistantPanel {
         prompt_builder: Arc<PromptBuilder>,
         cx: AsyncWindowContext,
     ) -> Task<Result<Entity<Self>>> {
-        cx.spawn(|mut cx| async move {
+        cx.spawn(async move |cx| {
             let tools = Arc::new(ToolWorkingSet::default());
-            log::info!("[assistant2-debug] initializing ThreadStore");
-            let thread_store = workspace.update(&mut cx, |workspace, cx| {
+            let thread_store = workspace.update(cx, |workspace, cx| {
                 let project = workspace.project().clone();
                 ThreadStore::new(project, tools.clone(), prompt_builder.clone(), cx)
             })??;
-            log::info!("[assistant2-debug] finished initializing ThreadStore");
 
             let slash_commands = Arc::new(SlashCommandWorkingSet::default());
-            log::info!("[assistant2-debug] initializing ContextStore");
             let context_store = workspace
-                .update(&mut cx, |workspace, cx| {
+                .update(cx, |workspace, cx| {
                     let project = workspace.project().clone();
                     assistant_context_editor::ContextStore::new(
                         project,
@@ -132,9 +129,8 @@ impl AssistantPanel {
                     )
                 })?
                 .await?;
-            log::info!("[assistant2-debug] finished initializing ContextStore");
 
-            workspace.update_in(&mut cx, |workspace, window, cx| {
+            workspace.update_in(cx, |workspace, window, cx| {
                 cx.new(|cx| Self::new(workspace, thread_store, context_store, window, cx))
             })
         })
@@ -147,7 +143,6 @@ impl AssistantPanel {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Self {
-        log::info!("[assistant2-debug] AssistantPanel::new");
         let thread = thread_store.update(cx, |this, cx| this.create_thread(cx));
         let fs = workspace.app_state().fs.clone();
         let project = workspace.project().clone();
@@ -155,10 +150,14 @@ impl AssistantPanel {
         let workspace = workspace.weak_handle();
         let weak_self = cx.entity().downgrade();
 
+        let message_editor_context_store =
+            cx.new(|_cx| crate::context_store::ContextStore::new(workspace.clone()));
+
         let message_editor = cx.new(|cx| {
             MessageEditor::new(
                 fs.clone(),
                 workspace.clone(),
+                message_editor_context_store.clone(),
                 thread_store.downgrade(),
                 thread.clone(),
                 window,
@@ -174,6 +173,8 @@ impl AssistantPanel {
                 thread.clone(),
                 thread_store.clone(),
                 language_registry.clone(),
+                message_editor_context_store.clone(),
+                workspace.clone(),
                 window,
                 cx,
             )
@@ -242,11 +243,17 @@ impl AssistantPanel {
             .update(cx, |this, cx| this.create_thread(cx));
 
         self.active_view = ActiveView::Thread;
+
+        let message_editor_context_store =
+            cx.new(|_cx| crate::context_store::ContextStore::new(self.workspace.clone()));
+
         self.thread = cx.new(|cx| {
             ActiveThread::new(
                 thread.clone(),
                 self.thread_store.clone(),
                 self.language_registry.clone(),
+                message_editor_context_store.clone(),
+                self.workspace.clone(),
                 window,
                 cx,
             )
@@ -255,6 +262,7 @@ impl AssistantPanel {
             MessageEditor::new(
                 self.fs.clone(),
                 self.workspace.clone(),
+                message_editor_context_store,
                 self.thread_store.downgrade(),
                 thread,
                 window,
@@ -338,9 +346,9 @@ impl AssistantPanel {
 
         let lsp_adapter_delegate = make_lsp_adapter_delegate(&project, cx).log_err().flatten();
 
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let context = context.await?;
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 let editor = cx.new(|cx| {
                     ContextEditor::for_context(
                         context,
@@ -371,15 +379,19 @@ impl AssistantPanel {
             .thread_store
             .update(cx, |this, cx| this.open_thread(thread_id, cx));
 
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let thread = open_thread_task.await?;
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 this.active_view = ActiveView::Thread;
+                let message_editor_context_store =
+                    cx.new(|_cx| crate::context_store::ContextStore::new(this.workspace.clone()));
                 this.thread = cx.new(|cx| {
                     ActiveThread::new(
                         thread.clone(),
                         this.thread_store.clone(),
                         this.language_registry.clone(),
+                        message_editor_context_store.clone(),
+                        this.workspace.clone(),
                         window,
                         cx,
                     )
@@ -388,6 +400,7 @@ impl AssistantPanel {
                     MessageEditor::new(
                         this.fs.clone(),
                         this.workspace.clone(),
+                        message_editor_context_store,
                         this.thread_store.downgrade(),
                         thread,
                         window,
@@ -400,8 +413,13 @@ impl AssistantPanel {
     }
 
     pub(crate) fn open_configuration(&mut self, window: &mut Window, cx: &mut Context<Self>) {
+        let context_server_manager = self.thread_store.read(cx).context_server_manager();
+        let tools = self.thread_store.read(cx).tools();
+
         self.active_view = ActiveView::Configuration;
-        self.configuration = Some(cx.new(|cx| AssistantConfiguration::new(window, cx)));
+        self.configuration = Some(
+            cx.new(|cx| AssistantConfiguration::new(context_server_manager, tools, window, cx)),
+        );
 
         if let Some(configuration) = self.configuration.as_ref() {
             self.configuration_subscription = Some(cx.subscribe_in(
@@ -435,12 +453,12 @@ impl AssistantPanel {
             .languages
             .language_for_name("Markdown");
         let thread = self.active_thread(cx);
-        cx.spawn_in(window, |_this, mut cx| async move {
+        cx.spawn_in(window, async move |_this, cx| {
             let markdown_language = markdown_language_task.await?;
 
-            workspace.update_in(&mut cx, |workspace, window, cx| {
+            workspace.update_in(cx, |workspace, window, cx| {
                 let thread = thread.read(cx);
-                let markdown = thread.to_markdown()?;
+                let markdown = thread.to_markdown(cx)?;
                 let thread_summary = thread
                     .summary()
                     .map(|summary| summary.to_string())
@@ -907,8 +925,8 @@ impl AssistantPanel {
                     ThreadError::MaxMonthlySpendReached => {
                         self.render_max_monthly_spend_reached_error(cx)
                     }
-                    ThreadError::Message(error_message) => {
-                        self.render_error_message(&error_message, cx)
+                    ThreadError::Message { header, message } => {
+                        self.render_error_message(header, message, cx)
                     }
                 })
                 .into_any(),
@@ -1011,7 +1029,8 @@ impl AssistantPanel {
 
     fn render_error_message(
         &self,
-        error_message: &SharedString,
+        header: SharedString,
+        message: SharedString,
         cx: &mut Context<Self>,
     ) -> AnyElement {
         v_flex()
@@ -1021,17 +1040,14 @@ impl AssistantPanel {
                     .gap_1p5()
                     .items_center()
                     .child(Icon::new(IconName::XCircle).color(Color::Error))
-                    .child(
-                        Label::new("Error interacting with language model")
-                            .weight(FontWeight::MEDIUM),
-                    ),
+                    .child(Label::new(header).weight(FontWeight::MEDIUM)),
             )
             .child(
                 div()
                     .id("error-message")
                     .max_h_32()
                     .overflow_y_scroll()
-                    .child(Label::new(error_message.clone())),
+                    .child(Label::new(message)),
             )
             .child(
                 h_flex()

crates/assistant2/src/buffer_codegen.rs

@@ -367,7 +367,7 @@ impl CodegenAlternative {
                 let request = self.build_request(user_prompt, cx)?;
                 self.request = Some(request.clone());
 
-                cx.spawn(|_, cx| async move { model.stream_completion_text(request, &cx).await })
+                cx.spawn(async move |_, cx| model.stream_completion_text(request, &cx).await)
                     .boxed_local()
             };
         self.handle_stream(telemetry_id, provider_id.to_string(), api_key, stream, cx);
@@ -480,213 +480,207 @@ impl CodegenAlternative {
         let completion = Arc::new(Mutex::new(String::new()));
         let completion_clone = completion.clone();
 
-        self.generation = cx.spawn(|codegen, mut cx| {
-            async move {
-                let stream = stream.await;
-                let message_id = stream
-                    .as_ref()
-                    .ok()
-                    .and_then(|stream| stream.message_id.clone());
-                let generate = async {
-                    let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
-                    let executor = cx.background_executor().clone();
-                    let message_id = message_id.clone();
-                    let line_based_stream_diff: Task<anyhow::Result<()>> =
-                        cx.background_spawn(async move {
-                            let mut response_latency = None;
-                            let request_start = Instant::now();
-                            let diff = async {
-                                let chunks = StripInvalidSpans::new(stream?.stream);
-                                futures::pin_mut!(chunks);
-                                let mut diff = StreamingDiff::new(selected_text.to_string());
-                                let mut line_diff = LineDiff::default();
+        self.generation = cx.spawn(async move |codegen, cx| {
+            let stream = stream.await;
+            let message_id = stream
+                .as_ref()
+                .ok()
+                .and_then(|stream| stream.message_id.clone());
+            let generate = async {
+                let (mut diff_tx, mut diff_rx) = mpsc::channel(1);
+                let executor = cx.background_executor().clone();
+                let message_id = message_id.clone();
+                let line_based_stream_diff: Task<anyhow::Result<()>> =
+                    cx.background_spawn(async move {
+                        let mut response_latency = None;
+                        let request_start = Instant::now();
+                        let diff = async {
+                            let chunks = StripInvalidSpans::new(stream?.stream);
+                            futures::pin_mut!(chunks);
+                            let mut diff = StreamingDiff::new(selected_text.to_string());
+                            let mut line_diff = LineDiff::default();
 
-                                let mut new_text = String::new();
-                                let mut base_indent = None;
-                                let mut line_indent = None;
-                                let mut first_line = true;
+                            let mut new_text = String::new();
+                            let mut base_indent = None;
+                            let mut line_indent = None;
+                            let mut first_line = true;
 
-                                while let Some(chunk) = chunks.next().await {
-                                    if response_latency.is_none() {
-                                        response_latency = Some(request_start.elapsed());
-                                    }
-                                    let chunk = chunk?;
-                                    completion_clone.lock().push_str(&chunk);
+                            while let Some(chunk) = chunks.next().await {
+                                if response_latency.is_none() {
+                                    response_latency = Some(request_start.elapsed());
+                                }
+                                let chunk = chunk?;
+                                completion_clone.lock().push_str(&chunk);
 
-                                    let mut lines = chunk.split('\n').peekable();
-                                    while let Some(line) = lines.next() {
-                                        new_text.push_str(line);
-                                        if line_indent.is_none() {
-                                            if let Some(non_whitespace_ch_ix) =
-                                                new_text.find(|ch: char| !ch.is_whitespace())
-                                            {
-                                                line_indent = Some(non_whitespace_ch_ix);
-                                                base_indent = base_indent.or(line_indent);
+                                let mut lines = chunk.split('\n').peekable();
+                                while let Some(line) = lines.next() {
+                                    new_text.push_str(line);
+                                    if line_indent.is_none() {
+                                        if let Some(non_whitespace_ch_ix) =
+                                            new_text.find(|ch: char| !ch.is_whitespace())
+                                        {
+                                            line_indent = Some(non_whitespace_ch_ix);
+                                            base_indent = base_indent.or(line_indent);
 
-                                                let line_indent = line_indent.unwrap();
-                                                let base_indent = base_indent.unwrap();
-                                                let indent_delta =
-                                                    line_indent as i32 - base_indent as i32;
-                                                let mut corrected_indent_len = cmp::max(
-                                                    0,
-                                                    suggested_line_indent.len as i32 + indent_delta,
-                                                )
-                                                    as usize;
-                                                if first_line {
-                                                    corrected_indent_len = corrected_indent_len
-                                                        .saturating_sub(
-                                                            selection_start.column as usize,
-                                                        );
-                                                }
-
-                                                let indent_char = suggested_line_indent.char();
-                                                let mut indent_buffer = [0; 4];
-                                                let indent_str =
-                                                    indent_char.encode_utf8(&mut indent_buffer);
-                                                new_text.replace_range(
-                                                    ..line_indent,
-                                                    &indent_str.repeat(corrected_indent_len),
-                                                );
+                                            let line_indent = line_indent.unwrap();
+                                            let base_indent = base_indent.unwrap();
+                                            let indent_delta =
+                                                line_indent as i32 - base_indent as i32;
+                                            let mut corrected_indent_len = cmp::max(
+                                                0,
+                                                suggested_line_indent.len as i32 + indent_delta,
+                                            )
+                                                as usize;
+                                            if first_line {
+                                                corrected_indent_len = corrected_indent_len
+                                                    .saturating_sub(
+                                                        selection_start.column as usize,
+                                                    );
                                             }
-                                        }
 
-                                        if line_indent.is_some() {
-                                            let char_ops = diff.push_new(&new_text);
-                                            line_diff
-                                                .push_char_operations(&char_ops, &selected_text);
-                                            diff_tx
-                                                .send((char_ops, line_diff.line_operations()))
-                                                .await?;
+                                            let indent_char = suggested_line_indent.char();
+                                            let mut indent_buffer = [0; 4];
+                                            let indent_str =
+                                                indent_char.encode_utf8(&mut indent_buffer);
+                                            new_text.replace_range(
+                                                ..line_indent,
+                                                &indent_str.repeat(corrected_indent_len),
+                                            );
+                                        }
+                                    }
+
+                                    if line_indent.is_some() {
+                                        let char_ops = diff.push_new(&new_text);
+                                        line_diff.push_char_operations(&char_ops, &selected_text);
+                                        diff_tx
+                                            .send((char_ops, line_diff.line_operations()))
+                                            .await?;
+                                        new_text.clear();
+                                    }
+
+                                    if lines.peek().is_some() {
+                                        let char_ops = diff.push_new("\n");
+                                        line_diff.push_char_operations(&char_ops, &selected_text);
+                                        diff_tx
+                                            .send((char_ops, line_diff.line_operations()))
+                                            .await?;
+                                        if line_indent.is_none() {
+                                            // Don't write out the leading indentation in empty lines on the next line
+                                            // This is the case where the above if statement didn't clear the buffer
                                             new_text.clear();
                                         }
-
-                                        if lines.peek().is_some() {
-                                            let char_ops = diff.push_new("\n");
-                                            line_diff
-                                                .push_char_operations(&char_ops, &selected_text);
-                                            diff_tx
-                                                .send((char_ops, line_diff.line_operations()))
-                                                .await?;
-                                            if line_indent.is_none() {
-                                                // Don't write out the leading indentation in empty lines on the next line
-                                                // This is the case where the above if statement didn't clear the buffer
-                                                new_text.clear();
-                                            }
-                                            line_indent = None;
-                                            first_line = false;
-                                        }
+                                        line_indent = None;
+                                        first_line = false;
                                     }
                                 }
-
-                                let mut char_ops = diff.push_new(&new_text);
-                                char_ops.extend(diff.finish());
-                                line_diff.push_char_operations(&char_ops, &selected_text);
-                                line_diff.finish(&selected_text);
-                                diff_tx
-                                    .send((char_ops, line_diff.line_operations()))
-                                    .await?;
-
-                                anyhow::Ok(())
-                            };
-
-                            let result = diff.await;
-
-                            let error_message =
-                                result.as_ref().err().map(|error| error.to_string());
-                            report_assistant_event(
-                                AssistantEvent {
-                                    conversation_id: None,
-                                    message_id,
-                                    kind: AssistantKind::Inline,
-                                    phase: AssistantPhase::Response,
-                                    model: model_telemetry_id,
-                                    model_provider: model_provider_id.to_string(),
-                                    response_latency,
-                                    error_message,
-                                    language_name: language_name.map(|name| name.to_proto()),
-                                },
-                                telemetry,
-                                http_client,
-                                model_api_key,
-                                &executor,
-                            );
-
-                            result?;
-                            Ok(())
-                        });
-
-                    while let Some((char_ops, line_ops)) = diff_rx.next().await {
-                        codegen.update(&mut cx, |codegen, cx| {
-                            codegen.last_equal_ranges.clear();
-
-                            let edits = char_ops
-                                .into_iter()
-                                .filter_map(|operation| match operation {
-                                    CharOperation::Insert { text } => {
-                                        let edit_start = snapshot.anchor_after(edit_start);
-                                        Some((edit_start..edit_start, text))
-                                    }
-                                    CharOperation::Delete { bytes } => {
-                                        let edit_end = edit_start + bytes;
-                                        let edit_range = snapshot.anchor_after(edit_start)
-                                            ..snapshot.anchor_before(edit_end);
-                                        edit_start = edit_end;
-                                        Some((edit_range, String::new()))
-                                    }
-                                    CharOperation::Keep { bytes } => {
-                                        let edit_end = edit_start + bytes;
-                                        let edit_range = snapshot.anchor_after(edit_start)
-                                            ..snapshot.anchor_before(edit_end);
-                                        edit_start = edit_end;
-                                        codegen.last_equal_ranges.push(edit_range);
-                                        None
-                                    }
-                                })
-                                .collect::<Vec<_>>();
-
-                            if codegen.active {
-                                codegen.apply_edits(edits.iter().cloned(), cx);
-                                codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
                             }
-                            codegen.edits.extend(edits);
-                            codegen.line_operations = line_ops;
-                            codegen.edit_position = Some(snapshot.anchor_after(edit_start));
 
-                            cx.notify();
-                        })?;
-                    }
+                            let mut char_ops = diff.push_new(&new_text);
+                            char_ops.extend(diff.finish());
+                            line_diff.push_char_operations(&char_ops, &selected_text);
+                            line_diff.finish(&selected_text);
+                            diff_tx
+                                .send((char_ops, line_diff.line_operations()))
+                                .await?;
 
-                    // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
-                    // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
-                    // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
-                    let batch_diff_task =
-                        codegen.update(&mut cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
-                    let (line_based_stream_diff, ()) =
-                        join!(line_based_stream_diff, batch_diff_task);
-                    line_based_stream_diff?;
+                            anyhow::Ok(())
+                        };
 
-                    anyhow::Ok(())
-                };
+                        let result = diff.await;
 
-                let result = generate.await;
-                let elapsed_time = start_time.elapsed().as_secs_f64();
+                        let error_message = result.as_ref().err().map(|error| error.to_string());
+                        report_assistant_event(
+                            AssistantEvent {
+                                conversation_id: None,
+                                message_id,
+                                kind: AssistantKind::Inline,
+                                phase: AssistantPhase::Response,
+                                model: model_telemetry_id,
+                                model_provider: model_provider_id.to_string(),
+                                response_latency,
+                                error_message,
+                                language_name: language_name.map(|name| name.to_proto()),
+                            },
+                            telemetry,
+                            http_client,
+                            model_api_key,
+                            &executor,
+                        );
 
-                codegen
-                    .update(&mut cx, |this, cx| {
-                        this.message_id = message_id;
-                        this.last_equal_ranges.clear();
-                        if let Err(error) = result {
-                            this.status = CodegenStatus::Error(error);
-                        } else {
-                            this.status = CodegenStatus::Done;
+                        result?;
+                        Ok(())
+                    });
+
+                while let Some((char_ops, line_ops)) = diff_rx.next().await {
+                    codegen.update(cx, |codegen, cx| {
+                        codegen.last_equal_ranges.clear();
+
+                        let edits = char_ops
+                            .into_iter()
+                            .filter_map(|operation| match operation {
+                                CharOperation::Insert { text } => {
+                                    let edit_start = snapshot.anchor_after(edit_start);
+                                    Some((edit_start..edit_start, text))
+                                }
+                                CharOperation::Delete { bytes } => {
+                                    let edit_end = edit_start + bytes;
+                                    let edit_range = snapshot.anchor_after(edit_start)
+                                        ..snapshot.anchor_before(edit_end);
+                                    edit_start = edit_end;
+                                    Some((edit_range, String::new()))
+                                }
+                                CharOperation::Keep { bytes } => {
+                                    let edit_end = edit_start + bytes;
+                                    let edit_range = snapshot.anchor_after(edit_start)
+                                        ..snapshot.anchor_before(edit_end);
+                                    edit_start = edit_end;
+                                    codegen.last_equal_ranges.push(edit_range);
+                                    None
+                                }
+                            })
+                            .collect::<Vec<_>>();
+
+                        if codegen.active {
+                            codegen.apply_edits(edits.iter().cloned(), cx);
+                            codegen.reapply_line_based_diff(line_ops.iter().cloned(), cx);
                         }
-                        this.elapsed_time = Some(elapsed_time);
-                        this.completion = Some(completion.lock().clone());
-                        cx.emit(CodegenEvent::Finished);
+                        codegen.edits.extend(edits);
+                        codegen.line_operations = line_ops;
+                        codegen.edit_position = Some(snapshot.anchor_after(edit_start));
+
                         cx.notify();
-                    })
-                    .ok();
-            }
+                    })?;
+                }
+
+                // Streaming stopped and we have the new text in the buffer, and a line-based diff applied for the whole new buffer.
+                // That diff is not what a regular diff is and might look unexpected, ergo apply a regular diff.
+                // It's fine to apply even if the rest of the line diffing fails, as no more hunks are coming through `diff_rx`.
+                let batch_diff_task =
+                    codegen.update(cx, |codegen, cx| codegen.reapply_batch_diff(cx))?;
+                let (line_based_stream_diff, ()) = join!(line_based_stream_diff, batch_diff_task);
+                line_based_stream_diff?;
+
+                anyhow::Ok(())
+            };
+
+            let result = generate.await;
+            let elapsed_time = start_time.elapsed().as_secs_f64();
+
+            codegen
+                .update(cx, |this, cx| {
+                    this.message_id = message_id;
+                    this.last_equal_ranges.clear();
+                    if let Err(error) = result {
+                        this.status = CodegenStatus::Error(error);
+                    } else {
+                        this.status = CodegenStatus::Done;
+                    }
+                    this.elapsed_time = Some(elapsed_time);
+                    this.completion = Some(completion.lock().clone());
+                    cx.emit(CodegenEvent::Finished);
+                    cx.notify();
+                })
+                .ok();
         });
         cx.notify();
     }
@@ -804,7 +798,7 @@ impl CodegenAlternative {
         let new_snapshot = self.buffer.read(cx).snapshot(cx);
         let new_range = self.range.to_point(&new_snapshot);
 
-        cx.spawn(|codegen, mut cx| async move {
+        cx.spawn(async move |codegen, cx| {
             let (deleted_row_ranges, inserted_row_ranges) = cx
                 .background_spawn(async move {
                     let old_text = old_snapshot
@@ -854,7 +848,7 @@ impl CodegenAlternative {
                 .await;
 
             codegen
-                .update(&mut cx, |codegen, cx| {
+                .update(cx, |codegen, cx| {
                     codegen.diff.deleted_row_ranges = deleted_row_ranges;
                     codegen.diff.inserted_row_ranges = inserted_row_ranges;
                     cx.notify();

crates/assistant2/src/context.rs

@@ -43,15 +43,6 @@ pub enum ContextKind {
 }
 
 impl ContextKind {
-    pub fn label(&self) -> &'static str {
-        match self {
-            ContextKind::File => "File",
-            ContextKind::Directory => "Folder",
-            ContextKind::FetchedUrl => "Fetch",
-            ContextKind::Thread => "Thread",
-        }
-    }
-
     pub fn icon(&self) -> IconName {
         match self {
             ContextKind::File => IconName::File,

crates/assistant2/src/context_picker.rs

@@ -1,4 +1,3 @@
-mod directory_context_picker;
 mod fetch_context_picker;
 mod file_context_picker;
 mod thread_context_picker;
@@ -15,8 +14,6 @@ use thread_context_picker::{render_thread_context_entry, ThreadContextEntry};
 use ui::{prelude::*, ContextMenu, ContextMenuEntry, ContextMenuItem};
 use workspace::{notifications::NotifyResultExt, Workspace};
 
-use crate::context::ContextKind;
-use crate::context_picker::directory_context_picker::DirectoryContextPicker;
 use crate::context_picker::fetch_context_picker::FetchContextPicker;
 use crate::context_picker::file_context_picker::FileContextPicker;
 use crate::context_picker::thread_context_picker::ThreadContextPicker;
@@ -30,17 +27,41 @@ pub enum ConfirmBehavior {
     Close,
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 enum ContextPickerMode {
+    File,
+    Fetch,
+    Thread,
+}
+
+impl ContextPickerMode {
+    pub fn label(&self) -> &'static str {
+        match self {
+            Self::File => "File/Directory",
+            Self::Fetch => "Fetch",
+            Self::Thread => "Thread",
+        }
+    }
+
+    pub fn icon(&self) -> IconName {
+        match self {
+            Self::File => IconName::File,
+            Self::Fetch => IconName::Globe,
+            Self::Thread => IconName::MessageCircle,
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+enum ContextPickerState {
     Default(Entity<ContextMenu>),
     File(Entity<FileContextPicker>),
-    Directory(Entity<DirectoryContextPicker>),
     Fetch(Entity<FetchContextPicker>),
     Thread(Entity<ThreadContextPicker>),
 }
 
 pub(super) struct ContextPicker {
-    mode: ContextPickerMode,
+    mode: ContextPickerState,
     workspace: WeakEntity<Workspace>,
     editor: WeakEntity<Editor>,
     context_store: WeakEntity<ContextStore>,
@@ -59,7 +80,7 @@ impl ContextPicker {
         cx: &mut Context<Self>,
     ) -> Self {
         ContextPicker {
-            mode: ContextPickerMode::Default(ContextMenu::build(
+            mode: ContextPickerState::Default(ContextMenu::build(
                 window,
                 cx,
                 |menu, _window, _cx| menu,
@@ -73,7 +94,7 @@ impl ContextPicker {
     }
 
     pub fn init(&mut self, window: &mut Window, cx: &mut Context<Self>) {
-        self.mode = ContextPickerMode::Default(self.build_menu(window, cx));
+        self.mode = ContextPickerState::Default(self.build_menu(window, cx));
         cx.notify();
     }
 
@@ -88,13 +109,9 @@ impl ContextPicker {
                 .enumerate()
                 .map(|(ix, entry)| self.recent_menu_item(context_picker.clone(), ix, entry));
 
-            let mut context_kinds = vec![
-                ContextKind::File,
-                ContextKind::Directory,
-                ContextKind::FetchedUrl,
-            ];
+            let mut modes = vec![ContextPickerMode::File, ContextPickerMode::Fetch];
             if self.allow_threads() {
-                context_kinds.push(ContextKind::Thread);
+                modes.push(ContextPickerMode::Thread);
             }
 
             let menu = menu
@@ -112,15 +129,15 @@ impl ContextPicker {
                 })
                 .extend(recent_entries)
                 .when(has_recent, |menu| menu.separator())
-                .extend(context_kinds.into_iter().map(|kind| {
+                .extend(modes.into_iter().map(|mode| {
                     let context_picker = context_picker.clone();
 
-                    ContextMenuEntry::new(kind.label())
-                        .icon(kind.icon())
+                    ContextMenuEntry::new(mode.label())
+                        .icon(mode.icon())
                         .icon_size(IconSize::XSmall)
                         .icon_color(Color::Muted)
                         .handler(move |window, cx| {
-                            context_picker.update(cx, |this, cx| this.select_kind(kind, window, cx))
+                            context_picker.update(cx, |this, cx| this.select_mode(mode, window, cx))
                         })
                 }));
 
@@ -143,12 +160,17 @@ impl ContextPicker {
         self.thread_store.is_some()
     }
 
-    fn select_kind(&mut self, kind: ContextKind, window: &mut Window, cx: &mut Context<Self>) {
+    fn select_mode(
+        &mut self,
+        mode: ContextPickerMode,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
         let context_picker = cx.entity().downgrade();
 
-        match kind {
-            ContextKind::File => {
-                self.mode = ContextPickerMode::File(cx.new(|cx| {
+        match mode {
+            ContextPickerMode::File => {
+                self.mode = ContextPickerState::File(cx.new(|cx| {
                     FileContextPicker::new(
                         context_picker.clone(),
                         self.workspace.clone(),
@@ -160,20 +182,8 @@ impl ContextPicker {
                     )
                 }));
             }
-            ContextKind::Directory => {
-                self.mode = ContextPickerMode::Directory(cx.new(|cx| {
-                    DirectoryContextPicker::new(
-                        context_picker.clone(),
-                        self.workspace.clone(),
-                        self.context_store.clone(),
-                        self.confirm_behavior,
-                        window,
-                        cx,
-                    )
-                }));
-            }
-            ContextKind::FetchedUrl => {
-                self.mode = ContextPickerMode::Fetch(cx.new(|cx| {
+            ContextPickerMode::Fetch => {
+                self.mode = ContextPickerState::Fetch(cx.new(|cx| {
                     FetchContextPicker::new(
                         context_picker.clone(),
                         self.workspace.clone(),
@@ -184,9 +194,9 @@ impl ContextPicker {
                     )
                 }));
             }
-            ContextKind::Thread => {
+            ContextPickerMode::Thread => {
                 if let Some(thread_store) = self.thread_store.as_ref() {
-                    self.mode = ContextPickerMode::Thread(cx.new(|cx| {
+                    self.mode = ContextPickerState::Thread(cx.new(|cx| {
                         ThreadContextPicker::new(
                             thread_store.clone(),
                             context_picker.clone(),
@@ -224,6 +234,7 @@ impl ContextPicker {
                             ElementId::NamedInteger("ctx-recent".into(), ix),
                             &path,
                             &path_prefix,
+                            false,
                             context_store.clone(),
                             cx,
                         )
@@ -270,10 +281,8 @@ impl ContextPicker {
             context_store.add_file_from_path(project_path.clone(), cx)
         });
 
-        cx.spawn_in(window, |_, mut cx| async move {
-            task.await.notify_async_err(&mut cx)
-        })
-        .detach();
+        cx.spawn_in(window, async move |_, cx| task.await.notify_async_err(cx))
+            .detach();
 
         cx.notify();
     }
@@ -296,13 +305,13 @@ impl ContextPicker {
         };
 
         let open_thread_task = thread_store.update(cx, |this, cx| this.open_thread(&thread.id, cx));
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let thread = open_thread_task.await?;
-            context_store.update(&mut cx, |context_store, cx| {
+            context_store.update(cx, |context_store, cx| {
                 context_store.add_thread(thread, cx);
             })?;
 
-            this.update(&mut cx, |_this, cx| cx.notify())
+            this.update(cx, |_this, cx| cx.notify())
         })
     }
 
@@ -392,11 +401,10 @@ impl EventEmitter<DismissEvent> for ContextPicker {}
 impl Focusable for ContextPicker {
     fn focus_handle(&self, cx: &App) -> FocusHandle {
         match &self.mode {
-            ContextPickerMode::Default(menu) => menu.focus_handle(cx),
-            ContextPickerMode::File(file_picker) => file_picker.focus_handle(cx),
-            ContextPickerMode::Directory(directory_picker) => directory_picker.focus_handle(cx),
-            ContextPickerMode::Fetch(fetch_picker) => fetch_picker.focus_handle(cx),
-            ContextPickerMode::Thread(thread_picker) => thread_picker.focus_handle(cx),
+            ContextPickerState::Default(menu) => menu.focus_handle(cx),
+            ContextPickerState::File(file_picker) => file_picker.focus_handle(cx),
+            ContextPickerState::Fetch(fetch_picker) => fetch_picker.focus_handle(cx),
+            ContextPickerState::Thread(thread_picker) => thread_picker.focus_handle(cx),
         }
     }
 }
@@ -407,13 +415,10 @@ impl Render for ContextPicker {
             .w(px(400.))
             .min_w(px(400.))
             .map(|parent| match &self.mode {
-                ContextPickerMode::Default(menu) => parent.child(menu.clone()),
-                ContextPickerMode::File(file_picker) => parent.child(file_picker.clone()),
-                ContextPickerMode::Directory(directory_picker) => {
-                    parent.child(directory_picker.clone())
-                }
-                ContextPickerMode::Fetch(fetch_picker) => parent.child(fetch_picker.clone()),
-                ContextPickerMode::Thread(thread_picker) => parent.child(thread_picker.clone()),
+                ContextPickerState::Default(menu) => parent.child(menu.clone()),
+                ContextPickerState::File(file_picker) => parent.child(file_picker.clone()),
+                ContextPickerState::Fetch(fetch_picker) => parent.child(fetch_picker.clone()),
+                ContextPickerState::Thread(thread_picker) => parent.child(thread_picker.clone()),
             })
     }
 }

crates/assistant2/src/context_picker/directory_context_picker.rs

@@ -1,269 +0,0 @@
-use std::path::Path;
-use std::sync::atomic::AtomicBool;
-use std::sync::Arc;
-
-use fuzzy::PathMatch;
-use gpui::{App, DismissEvent, Entity, FocusHandle, Focusable, Task, WeakEntity};
-use picker::{Picker, PickerDelegate};
-use project::{PathMatchCandidateSet, ProjectPath, WorktreeId};
-use ui::{prelude::*, ListItem};
-use util::ResultExt as _;
-use workspace::{notifications::NotifyResultExt, Workspace};
-
-use crate::context_picker::{ConfirmBehavior, ContextPicker};
-use crate::context_store::ContextStore;
-
-pub struct DirectoryContextPicker {
-    picker: Entity<Picker<DirectoryContextPickerDelegate>>,
-}
-
-impl DirectoryContextPicker {
-    pub fn new(
-        context_picker: WeakEntity<ContextPicker>,
-        workspace: WeakEntity<Workspace>,
-        context_store: WeakEntity<ContextStore>,
-        confirm_behavior: ConfirmBehavior,
-        window: &mut Window,
-        cx: &mut Context<Self>,
-    ) -> Self {
-        let delegate = DirectoryContextPickerDelegate::new(
-            context_picker,
-            workspace,
-            context_store,
-            confirm_behavior,
-        );
-        let picker = cx.new(|cx| Picker::uniform_list(delegate, window, cx));
-
-        Self { picker }
-    }
-}
-
-impl Focusable for DirectoryContextPicker {
-    fn focus_handle(&self, cx: &App) -> FocusHandle {
-        self.picker.focus_handle(cx)
-    }
-}
-
-impl Render for DirectoryContextPicker {
-    fn render(&mut self, _window: &mut Window, _cx: &mut Context<Self>) -> impl IntoElement {
-        self.picker.clone()
-    }
-}
-
-pub struct DirectoryContextPickerDelegate {
-    context_picker: WeakEntity<ContextPicker>,
-    workspace: WeakEntity<Workspace>,
-    context_store: WeakEntity<ContextStore>,
-    confirm_behavior: ConfirmBehavior,
-    matches: Vec<PathMatch>,
-    selected_index: usize,
-}
-
-impl DirectoryContextPickerDelegate {
-    pub fn new(
-        context_picker: WeakEntity<ContextPicker>,
-        workspace: WeakEntity<Workspace>,
-        context_store: WeakEntity<ContextStore>,
-        confirm_behavior: ConfirmBehavior,
-    ) -> Self {
-        Self {
-            context_picker,
-            workspace,
-            context_store,
-            confirm_behavior,
-            matches: Vec::new(),
-            selected_index: 0,
-        }
-    }
-
-    fn search(
-        &mut self,
-        query: String,
-        cancellation_flag: Arc<AtomicBool>,
-        workspace: &Entity<Workspace>,
-        cx: &mut Context<Picker<Self>>,
-    ) -> Task<Vec<PathMatch>> {
-        if query.is_empty() {
-            let workspace = workspace.read(cx);
-            let project = workspace.project().read(cx);
-            let directory_matches = project.worktrees(cx).flat_map(|worktree| {
-                let worktree = worktree.read(cx);
-                let path_prefix: Arc<str> = worktree.root_name().into();
-                worktree.directories(false, 0).map(move |entry| PathMatch {
-                    score: 0.,
-                    positions: Vec::new(),
-                    worktree_id: worktree.id().to_usize(),
-                    path: entry.path.clone(),
-                    path_prefix: path_prefix.clone(),
-                    distance_to_relative_ancestor: 0,
-                    is_dir: true,
-                })
-            });
-
-            Task::ready(directory_matches.collect())
-        } else {
-            let worktrees = workspace.read(cx).visible_worktrees(cx).collect::<Vec<_>>();
-            let candidate_sets = worktrees
-                .into_iter()
-                .map(|worktree| {
-                    let worktree = worktree.read(cx);
-
-                    PathMatchCandidateSet {
-                        snapshot: worktree.snapshot(),
-                        include_ignored: worktree
-                            .root_entry()
-                            .map_or(false, |entry| entry.is_ignored),
-                        include_root_name: true,
-                        candidates: project::Candidates::Directories,
-                    }
-                })
-                .collect::<Vec<_>>();
-
-            let executor = cx.background_executor().clone();
-            cx.foreground_executor().spawn(async move {
-                fuzzy::match_path_sets(
-                    candidate_sets.as_slice(),
-                    query.as_str(),
-                    None,
-                    false,
-                    100,
-                    &cancellation_flag,
-                    executor,
-                )
-                .await
-            })
-        }
-    }
-}
-
-impl PickerDelegate for DirectoryContextPickerDelegate {
-    type ListItem = ListItem;
-
-    fn match_count(&self) -> usize {
-        self.matches.len()
-    }
-
-    fn selected_index(&self) -> usize {
-        self.selected_index
-    }
-
-    fn set_selected_index(
-        &mut self,
-        ix: usize,
-        _window: &mut Window,
-        _cx: &mut Context<Picker<Self>>,
-    ) {
-        self.selected_index = ix;
-    }
-
-    fn placeholder_text(&self, _window: &mut Window, _cx: &mut App) -> Arc<str> {
-        "Search folders…".into()
-    }
-
-    fn update_matches(
-        &mut self,
-        query: String,
-        _window: &mut Window,
-        cx: &mut Context<Picker<Self>>,
-    ) -> Task<()> {
-        let Some(workspace) = self.workspace.upgrade() else {
-            return Task::ready(());
-        };
-
-        let search_task = self.search(query, Arc::<AtomicBool>::default(), &workspace, cx);
-
-        cx.spawn(|this, mut cx| async move {
-            let mut paths = search_task.await;
-            let empty_path = Path::new("");
-            paths.retain(|path_match| path_match.path.as_ref() != empty_path);
-
-            this.update(&mut cx, |this, _cx| {
-                this.delegate.matches = paths;
-            })
-            .log_err();
-        })
-    }
-
-    fn confirm(&mut self, _secondary: bool, window: &mut Window, cx: &mut Context<Picker<Self>>) {
-        let Some(mat) = self.matches.get(self.selected_index) else {
-            return;
-        };
-
-        let project_path = ProjectPath {
-            worktree_id: WorktreeId::from_usize(mat.worktree_id),
-            path: mat.path.clone(),
-        };
-
-        let Some(task) = self
-            .context_store
-            .update(cx, |context_store, cx| {
-                context_store.add_directory(project_path, cx)
-            })
-            .ok()
-        else {
-            return;
-        };
-
-        let confirm_behavior = self.confirm_behavior;
-        cx.spawn_in(window, |this, mut cx| async move {
-            match task.await.notify_async_err(&mut cx) {
-                None => anyhow::Ok(()),
-                Some(()) => this.update_in(&mut cx, |this, window, cx| match confirm_behavior {
-                    ConfirmBehavior::KeepOpen => {}
-                    ConfirmBehavior::Close => this.delegate.dismissed(window, cx),
-                }),
-            }
-        })
-        .detach_and_log_err(cx);
-    }
-
-    fn dismissed(&mut self, _window: &mut Window, cx: &mut Context<Picker<Self>>) {
-        self.context_picker
-            .update(cx, |_, cx| {
-                cx.emit(DismissEvent);
-            })
-            .ok();
-    }
-
-    fn render_match(
-        &self,
-        ix: usize,
-        selected: bool,
-        _window: &mut Window,
-        cx: &mut Context<Picker<Self>>,
-    ) -> Option<Self::ListItem> {
-        let path_match = &self.matches[ix];
-        let directory_name = path_match.path.to_string_lossy().to_string();
-
-        let added = self.context_store.upgrade().map_or(false, |context_store| {
-            context_store
-                .read(cx)
-                .includes_directory(&path_match.path)
-                .is_some()
-        });
-
-        Some(
-            ListItem::new(ix)
-                .inset(true)
-                .toggle_state(selected)
-                .start_slot(
-                    Icon::new(IconName::Folder)
-                        .size(IconSize::XSmall)
-                        .color(Color::Muted),
-                )
-                .child(Label::new(directory_name))
-                .when(added, |el| {
-                    el.end_slot(
-                        h_flex()
-                            .gap_1()
-                            .child(
-                                Icon::new(IconName::Check)
-                                    .size(IconSize::Small)
-                                    .color(Color::Success),
-                            )
-                            .child(Label::new("Added").size(LabelSize::Small)),
-                    )
-                }),
-        )
-    }
-}

crates/assistant2/src/context_picker/fetch_context_picker.rs

@@ -206,12 +206,12 @@ impl PickerDelegate for FetchContextPickerDelegate {
         let http_client = workspace.read(cx).client().http_client().clone();
         let url = self.url.clone();
         let confirm_behavior = self.confirm_behavior;
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let text = cx
                 .background_spawn(Self::build_message(http_client, url.clone()))
                 .await?;
 
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 this.delegate
                     .context_store
                     .update(cx, |context_store, _cx| {

crates/assistant2/src/context_picker/file_context_picker.rs

@@ -99,7 +99,6 @@ impl FileContextPickerDelegate {
         query: String,
         cancellation_flag: Arc<AtomicBool>,
         workspace: &Entity<Workspace>,
-
         cx: &mut Context<Picker<Self>>,
     ) -> Task<Vec<PathMatch>> {
         if query.is_empty() {
@@ -124,14 +123,14 @@ impl FileContextPickerDelegate {
             let file_matches = project.worktrees(cx).flat_map(|worktree| {
                 let worktree = worktree.read(cx);
                 let path_prefix: Arc<str> = worktree.root_name().into();
-                worktree.files(false, 0).map(move |entry| PathMatch {
+                worktree.entries(false, 0).map(move |entry| PathMatch {
                     score: 0.,
                     positions: Vec::new(),
                     worktree_id: worktree.id().to_usize(),
                     path: entry.path.clone(),
                     path_prefix: path_prefix.clone(),
                     distance_to_relative_ancestor: 0,
-                    is_dir: false,
+                    is_dir: entry.is_dir(),
                 })
             });
 
@@ -149,7 +148,7 @@ impl FileContextPickerDelegate {
                             .root_entry()
                             .map_or(false, |entry| entry.is_ignored),
                         include_root_name: true,
-                        candidates: project::Candidates::Files,
+                        candidates: project::Candidates::Entries,
                     }
                 })
                 .collect::<Vec<_>>();
@@ -192,7 +191,7 @@ impl PickerDelegate for FileContextPickerDelegate {
     }
 
     fn placeholder_text(&self, _window: &mut Window, _cx: &mut App) -> Arc<str> {
-        "Search files…".into()
+        "Search files & directories…".into()
     }
 
     fn update_matches(
@@ -207,11 +206,11 @@ impl PickerDelegate for FileContextPickerDelegate {
 
         let search_task = self.search(query, Arc::<AtomicBool>::default(), &workspace, cx);
 
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             // TODO: This should be probably be run in the background.
             let paths = search_task.await;
 
-            this.update(&mut cx, |this, _cx| {
+            this.update(cx, |this, _cx| {
                 this.delegate.matches = paths;
             })
             .log_err();
@@ -223,13 +222,11 @@ impl PickerDelegate for FileContextPickerDelegate {
             return;
         };
 
-        let Some(file_name) = mat
+        let file_name = mat
             .path
             .file_name()
             .map(|os_str| os_str.to_string_lossy().into_owned())
-        else {
-            return;
-        };
+            .unwrap_or(mat.path_prefix.to_string());
 
         let full_path = mat.path.display().to_string();
 
@@ -238,6 +235,8 @@ impl PickerDelegate for FileContextPickerDelegate {
             path: mat.path.clone(),
         };
 
+        let is_directory = mat.is_dir;
+
         let Some(editor_entity) = self.editor.upgrade() else {
             return;
         };
@@ -288,8 +287,12 @@ impl PickerDelegate for FileContextPickerDelegate {
 
                 editor.insert("\n", window, cx); // Needed to end the fold
 
-                let file_icon = FileIcons::get_icon(&Path::new(&full_path), cx)
-                    .unwrap_or_else(|| SharedString::new(""));
+                let file_icon = if is_directory {
+                    FileIcons::get_folder_icon(false, cx)
+                } else {
+                    FileIcons::get_icon(&Path::new(&full_path), cx)
+                }
+                .unwrap_or_else(|| SharedString::new(""));
 
                 let placeholder = FoldPlaceholder {
                     render: render_fold_icon_button(
@@ -330,7 +333,11 @@ impl PickerDelegate for FileContextPickerDelegate {
         let Some(task) = self
             .context_store
             .update(cx, |context_store, cx| {
-                context_store.add_file_from_path(project_path, cx)
+                if is_directory {
+                    context_store.add_directory(project_path, cx)
+                } else {
+                    context_store.add_file_from_path(project_path, cx)
+                }
             })
             .ok()
         else {
@@ -338,10 +345,10 @@ impl PickerDelegate for FileContextPickerDelegate {
         };
 
         let confirm_behavior = self.confirm_behavior;
-        cx.spawn_in(window, |this, mut cx| async move {
-            match task.await.notify_async_err(&mut cx) {
+        cx.spawn_in(window, async move |this, cx| {
+            match task.await.notify_async_err(cx) {
                 None => anyhow::Ok(()),
-                Some(()) => this.update_in(&mut cx, |this, window, cx| match confirm_behavior {
+                Some(()) => this.update_in(cx, |this, window, cx| match confirm_behavior {
                     ConfirmBehavior::KeepOpen => {}
                     ConfirmBehavior::Close => this.delegate.dismissed(window, cx),
                 }),
@@ -375,6 +382,7 @@ impl PickerDelegate for FileContextPickerDelegate {
                     ElementId::NamedInteger("file-ctx-picker".into(), ix),
                     &path_match.path,
                     &path_match.path_prefix,
+                    path_match.is_dir,
                     self.context_store.clone(),
                     cx,
                 )),
@@ -386,6 +394,7 @@ pub fn render_file_context_entry(
     id: ElementId,
     path: &Path,
     path_prefix: &Arc<str>,
+    is_directory: bool,
     context_store: WeakEntity<ContextStore>,
     cx: &App,
 ) -> Stateful<Div> {
@@ -409,13 +418,24 @@ pub fn render_file_context_entry(
         (file_name, Some(directory))
     };
 
-    let added = context_store
-        .upgrade()
-        .and_then(|context_store| context_store.read(cx).will_include_file_path(path, cx));
+    let added = context_store.upgrade().and_then(|context_store| {
+        if is_directory {
+            context_store
+                .read(cx)
+                .includes_directory(path)
+                .map(FileInclusion::Direct)
+        } else {
+            context_store.read(cx).will_include_file_path(path, cx)
+        }
+    });
 
-    let file_icon = FileIcons::get_icon(&path, cx)
-        .map(Icon::from_path)
-        .unwrap_or_else(|| Icon::new(IconName::File));
+    let file_icon = if is_directory {
+        FileIcons::get_folder_icon(false, cx)
+    } else {
+        FileIcons::get_icon(&path, cx)
+    }
+    .map(Icon::from_path)
+    .unwrap_or_else(|| Icon::new(IconName::File));
 
     h_flex()
         .id(id)

crates/assistant2/src/context_picker/thread_context_picker.rs

@@ -149,9 +149,9 @@ impl PickerDelegate for ThreadContextPickerDelegate {
             }
         });
 
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let matches = search_task.await;
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 this.delegate.matches = matches;
                 this.delegate.selected_index = 0;
                 cx.notify();
@@ -171,9 +171,9 @@ impl PickerDelegate for ThreadContextPickerDelegate {
 
         let open_thread_task = thread_store.update(cx, |this, cx| this.open_thread(&entry.id, cx));
 
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let thread = open_thread_task.await?;
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 this.delegate
                     .context_store
                     .update(cx, |context_store, cx| context_store.add_thread(thread, cx))

crates/assistant2/src/context_store.rs

@@ -9,6 +9,7 @@ use language::Buffer;
 use project::{ProjectPath, Worktree};
 use rope::Rope;
 use text::BufferId;
+use util::maybe;
 use workspace::Workspace;
 
 use crate::context::{
@@ -74,15 +75,15 @@ impl ContextStore {
             return Task::ready(Err(anyhow!("failed to read project")));
         };
 
-        cx.spawn(|this, mut cx| async move {
-            let open_buffer_task = project.update(&mut cx, |project, cx| {
+        cx.spawn(async move |this, cx| {
+            let open_buffer_task = project.update(cx, |project, cx| {
                 project.open_buffer(project_path.clone(), cx)
             })?;
 
             let buffer_entity = open_buffer_task.await?;
-            let buffer_id = this.update(&mut cx, |_, cx| buffer_entity.read(cx).remote_id())?;
+            let buffer_id = this.update(cx, |_, cx| buffer_entity.read(cx).remote_id())?;
 
-            let already_included = this.update(&mut cx, |this, _cx| {
+            let already_included = this.update(cx, |this, _cx| {
                 match this.will_include_buffer(buffer_id, &project_path.path) {
                     Some(FileInclusion::Direct(context_id)) => {
                         this.remove_context(context_id);
@@ -97,7 +98,7 @@ impl ContextStore {
                 return anyhow::Ok(());
             }
 
-            let (buffer_info, text_task) = this.update(&mut cx, |_, cx| {
+            let (buffer_info, text_task) = this.update(cx, |_, cx| {
                 let buffer = buffer_entity.read(cx);
                 collect_buffer_info_and_text(
                     project_path.path.clone(),
@@ -109,7 +110,7 @@ impl ContextStore {
 
             let text = text_task.await;
 
-            this.update(&mut cx, |this, _cx| {
+            this.update(cx, |this, _cx| {
                 this.insert_file(make_context_buffer(buffer_info, text));
             })?;
 
@@ -122,8 +123,8 @@ impl ContextStore {
         buffer_entity: Entity<Buffer>,
         cx: &mut Context<Self>,
     ) -> Task<Result<()>> {
-        cx.spawn(|this, mut cx| async move {
-            let (buffer_info, text_task) = this.update(&mut cx, |_, cx| {
+        cx.spawn(async move |this, cx| {
+            let (buffer_info, text_task) = this.update(cx, |_, cx| {
                 let buffer = buffer_entity.read(cx);
                 let Some(file) = buffer.file() else {
                     return Err(anyhow!("Buffer has no path."));
@@ -138,7 +139,7 @@ impl ContextStore {
 
             let text = text_task.await;
 
-            this.update(&mut cx, |this, _cx| {
+            this.update(cx, |this, _cx| {
                 this.insert_file(make_context_buffer(buffer_info, text))
             })?;
 
@@ -178,18 +179,18 @@ impl ContextStore {
         }
 
         let worktree_id = project_path.worktree_id;
-        cx.spawn(|this, mut cx| async move {
-            let worktree = project.update(&mut cx, |project, cx| {
+        cx.spawn(async move |this, cx| {
+            let worktree = project.update(cx, |project, cx| {
                 project
                     .worktree_for_id(worktree_id, cx)
                     .ok_or_else(|| anyhow!("no worktree found for {worktree_id:?}"))
             })??;
 
-            let files = worktree.update(&mut cx, |worktree, _cx| {
+            let files = worktree.update(cx, |worktree, _cx| {
                 collect_files_in_path(worktree, &project_path.path)
             })?;
 
-            let open_buffers_task = project.update(&mut cx, |project, cx| {
+            let open_buffers_task = project.update(cx, |project, cx| {
                 let tasks = files.iter().map(|file_path| {
                     project.open_buffer(
                         ProjectPath {
@@ -206,7 +207,7 @@ impl ContextStore {
 
             let mut buffer_infos = Vec::new();
             let mut text_tasks = Vec::new();
-            this.update(&mut cx, |_, cx| {
+            this.update(cx, |_, cx| {
                 for (path, buffer_entity) in files.into_iter().zip(buffers) {
                     // Skip all binary files and other non-UTF8 files
                     if let Ok(buffer_entity) = buffer_entity {
@@ -235,7 +236,7 @@ impl ContextStore {
                 bail!("No text files found in {}", &project_path.path.display());
             }
 
-            this.update(&mut cx, |this, _| {
+            this.update(cx, |this, _| {
                 this.insert_directory(&project_path.path, context_buffers);
             })?;
 
@@ -531,35 +532,59 @@ fn collect_files_in_path(worktree: &Worktree, path: &Path) -> Vec<Arc<Path>> {
 
 pub fn refresh_context_store_text(
     context_store: Entity<ContextStore>,
+    changed_buffers: &HashSet<Entity<Buffer>>,
     cx: &App,
-) -> impl Future<Output = ()> {
+) -> impl Future<Output = Vec<ContextId>> {
     let mut tasks = Vec::new();
+
     for context in &context_store.read(cx).context {
-        match context {
-            AssistantContext::File(file_context) => {
-                let context_store = context_store.clone();
-                if let Some(task) = refresh_file_text(context_store, file_context, cx) {
-                    tasks.push(task);
+        let id = context.id();
+
+        let task = maybe!({
+            match context {
+                AssistantContext::File(file_context) => {
+                    if changed_buffers.is_empty()
+                        || changed_buffers.contains(&file_context.context_buffer.buffer)
+                    {
+                        let context_store = context_store.clone();
+                        return refresh_file_text(context_store, file_context, cx);
+                    }
                 }
-            }
-            AssistantContext::Directory(directory_context) => {
-                let context_store = context_store.clone();
-                if let Some(task) = refresh_directory_text(context_store, directory_context, cx) {
-                    tasks.push(task);
+                AssistantContext::Directory(directory_context) => {
+                    let should_refresh = changed_buffers.is_empty()
+                        || changed_buffers.iter().any(|buffer| {
+                            let buffer = buffer.read(cx);
+
+                            buffer_path_log_err(&buffer)
+                                .map_or(false, |path| path.starts_with(&directory_context.path))
+                        });
+
+                    if should_refresh {
+                        let context_store = context_store.clone();
+                        return refresh_directory_text(context_store, directory_context, cx);
+                    }
                 }
+                AssistantContext::Thread(thread_context) => {
+                    if changed_buffers.is_empty() {
+                        let context_store = context_store.clone();
+                        return Some(refresh_thread_text(context_store, thread_context, cx));
+                    }
+                }
+                // Intentionally omit refreshing fetched URLs as it doesn't seem all that useful,
+                // and doing the caching properly could be tricky (unless it's already handled by
+                // the HttpClient?).
+                AssistantContext::FetchedUrl(_) => {}
             }
-            AssistantContext::Thread(thread_context) => {
-                let context_store = context_store.clone();
-                tasks.push(refresh_thread_text(context_store, thread_context, cx));
-            }
-            // Intentionally omit refreshing fetched URLs as it doesn't seem all that useful,
-            // and doing the caching properly could be tricky (unless it's already handled by
-            // the HttpClient?).
-            AssistantContext::FetchedUrl(_) => {}
+
+            None
+        });
+
+        if let Some(task) = task {
+            tasks.push(task.map(move |_| id));
         }
     }
 
-    future::join_all(tasks).map(|_| ())
+    future::join_all(tasks)
 }
 
 fn refresh_file_text(
@@ -570,10 +595,10 @@ fn refresh_file_text(
     let id = file_context.id;
     let task = refresh_context_buffer(&file_context.context_buffer, cx);
     if let Some(task) = task {
-        Some(cx.spawn(|mut cx| async move {
+        Some(cx.spawn(async move |cx| {
             let context_buffer = task.await;
             context_store
-                .update(&mut cx, |context_store, _| {
+                .update(cx, |context_store, _| {
                     let new_file_context = FileContext { id, context_buffer };
                     context_store.replace_context(AssistantContext::File(new_file_context));
                 })
@@ -611,10 +636,10 @@ fn refresh_directory_text(
 
     let id = directory_context.snapshot.id;
     let path = directory_context.path.clone();
-    Some(cx.spawn(|mut cx| async move {
+    Some(cx.spawn(async move |cx| {
         let context_buffers = context_buffers.await;
         context_store
-            .update(&mut cx, |context_store, _| {
+            .update(cx, |context_store, _| {
                 let new_directory_context = DirectoryContext::new(id, &path, context_buffers);
                 context_store.replace_context(AssistantContext::Directory(new_directory_context));
             })
@@ -629,9 +654,9 @@ fn refresh_thread_text(
 ) -> Task<()> {
     let id = thread_context.id;
     let thread = thread_context.thread.clone();
-    cx.spawn(move |mut cx| async move {
+    cx.spawn(async move |cx| {
         context_store
-            .update(&mut cx, |context_store, cx| {
+            .update(cx, |context_store, cx| {
                 let text = thread.read(cx).text().into();
                 context_store.replace_context(AssistantContext::Thread(ThreadContext {
                     id,

crates/assistant2/src/context_strip.rs

@@ -335,12 +335,12 @@ impl ContextStrip {
             context_store.accept_suggested_context(&suggested, cx)
         });
 
-        cx.spawn_in(window, |this, mut cx| async move {
-            match task.await.notify_async_err(&mut cx) {
+        cx.spawn_in(window, async move |this, cx| {
+            match task.await.notify_async_err(cx) {
                 None => {}
                 Some(()) => {
                     if let Some(this) = this.upgrade() {
-                        this.update(&mut cx, |_, cx| cx.notify())?;
+                        this.update(cx, |_, cx| cx.notify())?;
                     }
                 }
             }

crates/assistant2/src/inline_assistant.rs

@@ -276,7 +276,7 @@ impl InlineAssistant {
         if is_authenticated() {
             handle_assist(window, cx);
         } else {
-            cx.spawn_in(window, |_workspace, mut cx| async move {
+            cx.spawn_in(window, async move |_workspace, cx| {
                 let Some(task) = cx.update(|_, cx| {
                     LanguageModelRegistry::read_global(cx)
                         .active_provider()
@@ -1456,9 +1456,9 @@ impl EditorInlineAssists {
             assist_ids: Vec::new(),
             scroll_lock: None,
             highlight_updates: highlight_updates_tx,
-            _update_highlights: cx.spawn(|cx| {
+            _update_highlights: cx.spawn({
                 let editor = editor.downgrade();
-                async move {
+                async move |cx| {
                     while let Ok(()) = highlight_updates_rx.changed().await {
                         let editor = editor.upgrade().context("editor was dropped")?;
                         cx.update_global(|assistant: &mut InlineAssistant, cx| {
@@ -1729,6 +1729,7 @@ impl CodeActionProvider for AssistantCodeActionProvider {
                     title: "Fix with Assistant".into(),
                     ..Default::default()
                 })),
+                resolved: true,
             }]))
         } else {
             Task::ready(Ok(Vec::new()))
@@ -1747,10 +1748,10 @@ impl CodeActionProvider for AssistantCodeActionProvider {
         let editor = self.editor.clone();
         let workspace = self.workspace.clone();
         let thread_store = self.thread_store.clone();
-        window.spawn(cx, |mut cx| async move {
+        window.spawn(cx, async move |cx| {
             let editor = editor.upgrade().context("editor was released")?;
             let range = editor
-                .update(&mut cx, |editor, cx| {
+                .update(cx, |editor, cx| {
                     editor.buffer().update(cx, |multibuffer, cx| {
                         let buffer = buffer.read(cx);
                         let multibuffer_snapshot = multibuffer.read(cx);

crates/assistant2/src/message_editor.rs

@@ -1,24 +1,27 @@
 use std::sync::Arc;
 
+use collections::HashSet;
 use editor::actions::MoveUp;
 use editor::{Editor, EditorElement, EditorEvent, EditorStyle};
-use file_icons::FileIcons;
 use fs::Fs;
+use git::ExpandCommitEditor;
+use git_ui::git_panel;
 use gpui::{
     Animation, AnimationExt, App, DismissEvent, Entity, Focusable, Subscription, TextStyle,
     WeakEntity,
 };
 use language_model::LanguageModelRegistry;
 use language_model_selector::ToggleModelSelector;
+use project::Project;
 use rope::Point;
 use settings::Settings;
 use std::time::Duration;
 use text::Bias;
 use theme::ThemeSettings;
 use ui::{
-    prelude::*, ButtonLike, Disclosure, KeyBinding, PlatformStyle, PopoverMenu, PopoverMenuHandle,
-    Tooltip,
+    prelude::*, ButtonLike, KeyBinding, PlatformStyle, PopoverMenu, PopoverMenuHandle, Tooltip,
 };
+use util::ResultExt;
 use vim_mode_setting::VimModeSetting;
 use workspace::notifications::{NotificationId, NotifyTaskExt};
 use workspace::{Toast, Workspace};
@@ -30,12 +33,13 @@ use crate::context_strip::{ContextStrip, ContextStripEvent, SuggestContextKind};
 use crate::thread::{RequestKind, Thread};
 use crate::thread_store::ThreadStore;
 use crate::tool_selector::ToolSelector;
-use crate::{Chat, ChatMode, RemoveAllContext, ToggleContextPicker};
+use crate::{Chat, ChatMode, RemoveAllContext, ThreadEvent, ToggleContextPicker};
 
 pub struct MessageEditor {
     thread: Entity<Thread>,
     editor: Entity<Editor>,
     workspace: WeakEntity<Workspace>,
+    project: Entity<Project>,
     context_store: Entity<ContextStore>,
     context_strip: Entity<ContextStrip>,
     context_picker_menu_handle: PopoverMenuHandle<ContextPicker>,
@@ -43,7 +47,6 @@ pub struct MessageEditor {
     inline_context_picker_menu_handle: PopoverMenuHandle<ContextPicker>,
     model_selector: Entity<AssistantModelSelector>,
     tool_selector: Entity<ToolSelector>,
-    edits_expanded: bool,
     _subscriptions: Vec<Subscription>,
 }
 
@@ -51,13 +54,13 @@ impl MessageEditor {
     pub fn new(
         fs: Arc<dyn Fs>,
         workspace: WeakEntity<Workspace>,
+        context_store: Entity<ContextStore>,
         thread_store: WeakEntity<ThreadStore>,
         thread: Entity<Thread>,
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Self {
         let tools = thread.read(cx).tools().clone();
-        let context_store = cx.new(|_cx| ContextStore::new(workspace.clone()));
         let context_picker_menu_handle = PopoverMenuHandle::default();
         let inline_context_picker_menu_handle = PopoverMenuHandle::default();
         let model_selector_menu_handle = PopoverMenuHandle::default();
@@ -106,8 +109,9 @@ impl MessageEditor {
         ];
 
         Self {
-            thread,
             editor: editor.clone(),
+            project: thread.read(cx).project().clone(),
+            thread,
             workspace,
             context_store,
             context_strip,
@@ -124,7 +128,6 @@ impl MessageEditor {
                 )
             }),
             tool_selector: cx.new(|cx| ToolSelector::new(tools, cx)),
-            edits_expanded: false,
             _subscriptions: subscriptions,
         }
     }
@@ -157,7 +160,7 @@ impl MessageEditor {
             return;
         }
 
-        if self.thread.read(cx).is_streaming() {
+        if self.thread.read(cx).is_generating() {
             return;
         }
 
@@ -200,16 +203,31 @@ impl MessageEditor {
             text
         });
 
-        let refresh_task = refresh_context_store_text(self.context_store.clone(), cx);
+        let refresh_task =
+            refresh_context_store_text(self.context_store.clone(), &HashSet::default(), cx);
+
+        let system_prompt_context_task = self.thread.read(cx).load_system_prompt_context(cx);
 
         let thread = self.thread.clone();
         let context_store = self.context_store.clone();
-        cx.spawn(move |_, mut cx| async move {
+        let git_store = self.project.read(cx).git_store();
+        let checkpoint = git_store.read(cx).checkpoint(cx);
+        cx.spawn(async move |_, cx| {
             refresh_task.await;
+            let (system_prompt_context, load_error) = system_prompt_context_task.await;
             thread
-                .update(&mut cx, |thread, cx| {
+                .update(cx, |thread, cx| {
+                    thread.set_system_prompt_context(system_prompt_context);
+                    if let Some(load_error) = load_error {
+                        cx.emit(ThreadEvent::ShowError(load_error));
+                    }
+                })
+                .ok();
+            let checkpoint = checkpoint.await.log_err();
+            thread
+                .update(cx, |thread, cx| {
                     let context = context_store.read(cx).snapshot(cx).collect::<Vec<_>>();
-                    thread.insert_user_message(user_message, context, cx);
+                    thread.insert_user_message(user_message, context, checkpoint, cx);
                     thread.send_to_model(model, request_kind, cx);
                 })
                 .ok();
@@ -295,9 +313,9 @@ impl MessageEditor {
             .thread
             .update(cx, |thread, cx| thread.report_feedback(is_positive, cx));
 
-        cx.spawn(|_, mut cx| async move {
+        cx.spawn(async move |_, cx| {
             report.await?;
-            workspace.update(&mut cx, |workspace, cx| {
+            workspace.update(cx, |workspace, cx| {
                 let message = if is_positive {
                     "Positive feedback recorded. Thank you!"
                 } else {
@@ -326,7 +344,7 @@ impl Render for MessageEditor {
         let focus_handle = self.editor.focus_handle(cx);
         let inline_context_picker = self.inline_context_picker.clone();
         let bg_color = cx.theme().colors().editor_background;
-        let is_streaming_completion = self.thread.read(cx).is_streaming();
+        let is_generating = self.thread.read(cx).is_generating();
         let is_model_selected = self.is_model_selected(cx);
         let is_editor_empty = self.is_editor_empty(cx);
         let submit_label_color = if is_editor_empty {
@@ -345,12 +363,16 @@ impl Render for MessageEditor {
             px(64.)
         };
 
-        let changed_buffers = self.thread.read(cx).scripting_changed_buffers(cx);
-        let changed_buffers_count = changed_buffers.len();
+        let project = self.thread.read(cx).project();
+        let changed_files = if let Some(repository) = project.read(cx).active_repository(cx) {
+            repository.read(cx).status().count()
+        } else {
+            0
+        };
 
         v_flex()
             .size_full()
-            .when(is_streaming_completion, |parent| {
+            .when(is_generating, |parent| {
                 let focus_handle = self.editor.focus_handle(cx).clone();
                 parent.child(
                     h_flex().py_3().w_full().justify_center().child(
@@ -408,7 +430,7 @@ impl Render for MessageEditor {
                     ),
                 )
             })
-            .when(changed_buffers_count > 0, |parent| {
+            .when(changed_files > 0, |parent| {
                 parent.child(
                     v_flex()
                         .mx_2()
@@ -419,96 +441,60 @@ impl Render for MessageEditor {
                         .rounded_t_md()
                         .child(
                             h_flex()
-                                .gap_2()
+                                .justify_between()
                                 .p_2()
                                 .child(
-                                    Disclosure::new("edits-disclosure", self.edits_expanded)
-                                        .on_click(cx.listener(|this, _ev, _window, cx| {
-                                            this.edits_expanded = !this.edits_expanded;
-                                            cx.notify();
-                                        })),
+                                    h_flex()
+                                        .gap_2()
+                                        .child(
+                                            IconButton::new(
+                                                "edits-disclosure",
+                                                IconName::GitBranchSmall,
+                                            )
+                                            .icon_size(IconSize::Small)
+                                            .on_click(
+                                                |_ev, _window, cx| {
+                                                    cx.defer(|cx| {
+                                                        cx.dispatch_action(&git_panel::ToggleFocus)
+                                                    });
+                                                },
+                                            ),
+                                        )
+                                        .child(
+                                            Label::new(format!(
+                                                "{} {} changed",
+                                                changed_files,
+                                                if changed_files == 1 { "file" } else { "files" }
+                                            ))
+                                            .size(LabelSize::XSmall)
+                                            .color(Color::Muted),
+                                        ),
                                 )
                                 .child(
-                                    Label::new("Edits")
-                                        .size(LabelSize::XSmall)
-                                        .color(Color::Muted),
-                                )
-                                .child(Label::new("•").size(LabelSize::XSmall).color(Color::Muted))
-                                .child(
-                                    Label::new(format!(
-                                        "{} {}",
-                                        changed_buffers_count,
-                                        if changed_buffers_count == 1 {
-                                            "file"
-                                        } else {
-                                            "files"
-                                        }
-                                    ))
-                                    .size(LabelSize::XSmall)
-                                    .color(Color::Muted),
+                                    h_flex()
+                                        .gap_2()
+                                        .child(
+                                            Button::new("review", "Review")
+                                                .label_size(LabelSize::XSmall)
+                                                .on_click(|_event, _window, cx| {
+                                                    cx.defer(|cx| {
+                                                        cx.dispatch_action(
+                                                            &git_ui::project_diff::Diff,
+                                                        );
+                                                    });
+                                                }),
+                                        )
+                                        .child(
+                                            Button::new("commit", "Commit")
+                                                .label_size(LabelSize::XSmall)
+                                                .on_click(|_event, _window, cx| {
+                                                    cx.defer(|cx| {
+                                                        cx.dispatch_action(&ExpandCommitEditor)
+                                                    });
+                                                }),
+                                        ),
                                 ),
-                        )
-                        .when(self.edits_expanded, |parent| {
-                            parent.child(
-                                v_flex().bg(cx.theme().colors().editor_background).children(
-                                    changed_buffers.enumerate().flat_map(|(index, buffer)| {
-                                        let file = buffer.read(cx).file()?;
-                                        let path = file.path();
-
-                                        let parent_label = path.parent().and_then(|parent| {
-                                            let parent_str = parent.to_string_lossy();
-
-                                            if parent_str.is_empty() {
-                                                None
-                                            } else {
-                                                Some(
-                                                    Label::new(format!(
-                                                        "{}{}",
-                                                        parent_str,
-                                                        std::path::MAIN_SEPARATOR_STR
-                                                    ))
-                                                    .color(Color::Muted)
-                                                    .size(LabelSize::Small),
-                                                )
-                                            }
-                                        });
-
-                                        let name_label = path.file_name().map(|name| {
-                                            Label::new(name.to_string_lossy().to_string())
-                                                .size(LabelSize::Small)
-                                        });
-
-                                        let file_icon = FileIcons::get_icon(&path, cx)
-                                            .map(Icon::from_path)
-                                            .unwrap_or_else(|| Icon::new(IconName::File));
-
-                                        let element = div()
-                                            .p_2()
-                                            .when(index + 1 < changed_buffers_count, |parent| {
-                                                parent
-                                                    .border_color(cx.theme().colors().border)
-                                                    .border_b_1()
-                                            })
-                                            .child(
-                                                h_flex()
-                                                    .gap_2()
-                                                    .child(file_icon)
-                                                    .child(
-                                                        // TODO: handle overflow
-                                                        h_flex()
-                                                            .children(parent_label)
-                                                            .children(name_label),
-                                                    )
-                                                    // TODO: show lines changed
-                                                    .child(Label::new("+").color(Color::Created))
-                                                    .child(Label::new("-").color(Color::Deleted)),
-                                            );
-
-                                        Some(element)
-                                    }),
-                                ),
-                            )
-                        }),
+                        ),
                 )
             })
             .child(
@@ -623,7 +609,7 @@ impl Render for MessageEditor {
                                                 .disabled(
                                                     is_editor_empty
                                                         || !is_model_selected
-                                                        || is_streaming_completion,
+                                                        || is_generating,
                                                 )
                                                 .child(
                                                     h_flex()
@@ -658,7 +644,7 @@ impl Render for MessageEditor {
                                                         "Type a message to submit",
                                                     ))
                                                 })
-                                                .when(is_streaming_completion, |button| {
+                                                .when(is_generating, |button| {
                                                     button.tooltip(Tooltip::text(
                                                         "Cancel to submit a new message",
                                                     ))

crates/assistant2/src/terminal_codegen.rs

@@ -40,7 +40,7 @@ impl TerminalCodegen {
         let telemetry = self.telemetry.clone();
         self.status = CodegenStatus::Pending;
         self.transaction = Some(TerminalTransaction::start(self.terminal.clone()));
-        self.generation = cx.spawn(|this, mut cx| async move {
+        self.generation = cx.spawn(async move |this, cx| {
             let model_telemetry_id = model.telemetry_id();
             let model_provider_id = model.provider_id();
             let response = model.stream_completion_text(prompt, &cx).await;
@@ -97,12 +97,12 @@ impl TerminalCodegen {
                     }
                 });
 
-                this.update(&mut cx, |this, _| {
+                this.update(cx, |this, _| {
                     this.message_id = message_id;
                 })?;
 
                 while let Some(hunk) = hunks_rx.next().await {
-                    this.update(&mut cx, |this, cx| {
+                    this.update(cx, |this, cx| {
                         if let Some(transaction) = &mut this.transaction {
                             transaction.push(hunk, cx);
                             cx.notify();
@@ -116,7 +116,7 @@ impl TerminalCodegen {
 
             let result = generate.await;
 
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 if let Err(error) = result {
                     this.status = CodegenStatus::Error(error);
                 } else {

crates/assistant2/src/thread.rs

@@ -1,10 +1,12 @@
+use std::fmt::Write as _;
 use std::io::Write;
 use std::sync::Arc;
 
 use anyhow::{Context as _, Result};
-use assistant_tool::ToolWorkingSet;
+use assistant_tool::{ActionLog, ToolWorkingSet};
 use chrono::{DateTime, Utc};
 use collections::{BTreeMap, HashMap, HashSet};
+use fs::Fs;
 use futures::future::Shared;
 use futures::{FutureExt, StreamExt as _};
 use git;
@@ -15,11 +17,14 @@ use language_model::{
     LanguageModelToolUseId, MaxMonthlySpendReachedError, MessageContent, PaymentRequiredError,
     Role, StopReason, TokenUsage,
 };
-use project::Project;
-use prompt_store::{AssistantSystemPromptWorktree, PromptBuilder};
+use project::git_store::{GitStore, GitStoreCheckpoint};
+use project::{Project, Worktree};
+use prompt_store::{
+    AssistantSystemPromptContext, PromptBuilder, RulesFile, WorktreeInfoForSystemPrompt,
+};
 use scripting_tool::{ScriptingSession, ScriptingTool};
 use serde::{Deserialize, Serialize};
-use util::{post_inc, ResultExt, TryFutureExt as _};
+use util::{maybe, post_inc, ResultExt as _, TryFutureExt as _};
 use uuid::Uuid;
 
 use crate::context::{attach_context_to_message, ContextId, ContextSnapshot};
@@ -88,6 +93,31 @@ pub struct GitState {
     pub diff: Option<String>,
 }
 
+#[derive(Clone)]
+pub struct ThreadCheckpoint {
+    message_id: MessageId,
+    git_checkpoint: GitStoreCheckpoint,
+}
+
+pub enum LastRestoreCheckpoint {
+    Pending {
+        message_id: MessageId,
+    },
+    Error {
+        message_id: MessageId,
+        error: String,
+    },
+}
+
+impl LastRestoreCheckpoint {
+    pub fn message_id(&self) -> MessageId {
+        match self {
+            LastRestoreCheckpoint::Pending { message_id } => *message_id,
+            LastRestoreCheckpoint::Error { message_id, .. } => *message_id,
+        }
+    }
+}
+
 /// A thread of conversation with the LLM.
 pub struct Thread {
     id: ThreadId,
@@ -98,12 +128,16 @@ pub struct Thread {
     next_message_id: MessageId,
     context: BTreeMap<ContextId, ContextSnapshot>,
     context_by_message: HashMap<MessageId, Vec<ContextId>>,
+    system_prompt_context: Option<AssistantSystemPromptContext>,
+    checkpoints_by_message: HashMap<MessageId, GitStoreCheckpoint>,
     completion_count: usize,
     pending_completions: Vec<PendingCompletion>,
     project: Entity<Project>,
     prompt_builder: Arc<PromptBuilder>,
     tools: Arc<ToolWorkingSet>,
     tool_use: ToolUseState,
+    action_log: Entity<ActionLog>,
+    last_restore_checkpoint: Option<LastRestoreCheckpoint>,
     scripting_session: Entity<ScriptingSession>,
     scripting_tool_use: ToolUseState,
     initial_project_snapshot: Shared<Task<Option<Arc<ProjectSnapshot>>>>,
@@ -126,14 +160,18 @@ impl Thread {
             next_message_id: MessageId(0),
             context: BTreeMap::default(),
             context_by_message: HashMap::default(),
+            system_prompt_context: None,
+            checkpoints_by_message: HashMap::default(),
             completion_count: 0,
             pending_completions: Vec::new(),
             project: project.clone(),
             prompt_builder,
-            tools,
-            tool_use: ToolUseState::new(),
+            tools: tools.clone(),
+            last_restore_checkpoint: None,
+            tool_use: ToolUseState::new(tools.clone()),
             scripting_session: cx.new(|cx| ScriptingSession::new(project.clone(), cx)),
-            scripting_tool_use: ToolUseState::new(),
+            scripting_tool_use: ToolUseState::new(tools),
+            action_log: cx.new(|_| ActionLog::new()),
             initial_project_snapshot: {
                 let project_snapshot = Self::project_snapshot(project, cx);
                 cx.foreground_executor()
@@ -159,11 +197,12 @@ impl Thread {
                 .map(|message| message.id.0 + 1)
                 .unwrap_or(0),
         );
-        let tool_use = ToolUseState::from_serialized_messages(&serialized.messages, |name| {
-            name != ScriptingTool::NAME
-        });
+        let tool_use =
+            ToolUseState::from_serialized_messages(tools.clone(), &serialized.messages, |name| {
+                name != ScriptingTool::NAME
+            });
         let scripting_tool_use =
-            ToolUseState::from_serialized_messages(&serialized.messages, |name| {
+            ToolUseState::from_serialized_messages(tools.clone(), &serialized.messages, |name| {
                 name == ScriptingTool::NAME
             });
         let scripting_session = cx.new(|cx| ScriptingSession::new(project.clone(), cx));
@@ -185,12 +224,16 @@ impl Thread {
             next_message_id,
             context: BTreeMap::default(),
             context_by_message: HashMap::default(),
+            system_prompt_context: None,
+            checkpoints_by_message: HashMap::default(),
             completion_count: 0,
             pending_completions: Vec::new(),
+            last_restore_checkpoint: None,
             project,
             prompt_builder,
             tools,
             tool_use,
+            action_log: cx.new(|_| ActionLog::new()),
             scripting_session,
             scripting_tool_use,
             initial_project_snapshot: Task::ready(serialized.initial_project_snapshot).shared(),
@@ -237,7 +280,7 @@ impl Thread {
         self.messages.iter()
     }
 
-    pub fn is_streaming(&self) -> bool {
+    pub fn is_generating(&self) -> bool {
         !self.pending_completions.is_empty() || !self.all_tools_finished()
     }
 
@@ -245,6 +288,66 @@ impl Thread {
         &self.tools
     }
 
+    pub fn checkpoint_for_message(&self, id: MessageId) -> Option<ThreadCheckpoint> {
+        let checkpoint = self.checkpoints_by_message.get(&id).cloned()?;
+        Some(ThreadCheckpoint {
+            message_id: id,
+            git_checkpoint: checkpoint,
+        })
+    }
+
+    pub fn restore_checkpoint(
+        &mut self,
+        checkpoint: ThreadCheckpoint,
+        cx: &mut Context<Self>,
+    ) -> Task<Result<()>> {
+        self.last_restore_checkpoint = Some(LastRestoreCheckpoint::Pending {
+            message_id: checkpoint.message_id,
+        });
+        cx.emit(ThreadEvent::CheckpointChanged);
+
+        let project = self.project.read(cx);
+        let restore = project
+            .git_store()
+            .read(cx)
+            .restore_checkpoint(checkpoint.git_checkpoint, cx);
+        cx.spawn(async move |this, cx| {
+            let result = restore.await;
+            this.update(cx, |this, cx| {
+                if let Err(err) = result.as_ref() {
+                    this.last_restore_checkpoint = Some(LastRestoreCheckpoint::Error {
+                        message_id: checkpoint.message_id,
+                        error: err.to_string(),
+                    });
+                } else {
+                    this.last_restore_checkpoint = None;
+                    this.truncate(checkpoint.message_id, cx);
+                }
+                cx.emit(ThreadEvent::CheckpointChanged);
+            })?;
+            result
+        })
+    }
+
+    pub fn last_restore_checkpoint(&self) -> Option<&LastRestoreCheckpoint> {
+        self.last_restore_checkpoint.as_ref()
+    }
+
+    pub fn truncate(&mut self, message_id: MessageId, cx: &mut Context<Self>) {
+        let Some(message_ix) = self
+            .messages
+            .iter()
+            .rposition(|message| message.id == message_id)
+        else {
+            return;
+        };
+        for deleted_message in self.messages.drain(message_ix..) {
+            self.context_by_message.remove(&deleted_message.id);
+            self.checkpoints_by_message.remove(&deleted_message.id);
+        }
+        cx.notify();
+    }
+
     pub fn context_for_message(&self, id: MessageId) -> Option<Vec<ContextSnapshot>> {
         let context = self.context_by_message.get(&id)?;
         Some(
@@ -264,23 +367,27 @@ impl Thread {
             .into_iter()
             .chain(self.scripting_tool_use.pending_tool_uses());
 
-        // If the only pending tool uses left are the ones with errors, then that means that we've finished running all
-        // of the pending tools.
+        // If the only pending tool uses left are the ones with errors, then
+        // that means that we've finished running all of the pending tools.
         all_pending_tool_uses.all(|tool_use| tool_use.status.is_error())
     }
 
-    pub fn tool_uses_for_message(&self, id: MessageId) -> Vec<ToolUse> {
-        self.tool_use.tool_uses_for_message(id)
+    pub fn tool_uses_for_message(&self, id: MessageId, cx: &App) -> Vec<ToolUse> {
+        self.tool_use.tool_uses_for_message(id, cx)
     }
 
-    pub fn scripting_tool_uses_for_message(&self, id: MessageId) -> Vec<ToolUse> {
-        self.scripting_tool_use.tool_uses_for_message(id)
+    pub fn scripting_tool_uses_for_message(&self, id: MessageId, cx: &App) -> Vec<ToolUse> {
+        self.scripting_tool_use.tool_uses_for_message(id, cx)
     }
 
     pub fn tool_results_for_message(&self, id: MessageId) -> Vec<&LanguageModelToolResult> {
         self.tool_use.tool_results_for_message(id)
     }
 
+    pub fn tool_result(&self, id: &LanguageModelToolUseId) -> Option<&LanguageModelToolResult> {
+        self.tool_use.tool_result(id)
+    }
+
     pub fn scripting_tool_results_for_message(
         &self,
         id: MessageId,
@@ -288,13 +395,6 @@ impl Thread {
         self.scripting_tool_use.tool_results_for_message(id)
     }
 
-    pub fn scripting_changed_buffers<'a>(
-        &self,
-        cx: &'a App,
-    ) -> impl ExactSizeIterator<Item = &'a Entity<language::Buffer>> {
-        self.scripting_session.read(cx).changed_buffers()
-    }
-
     pub fn message_has_tool_results(&self, message_id: MessageId) -> bool {
         self.tool_use.message_has_tool_results(message_id)
     }
@@ -307,6 +407,7 @@ impl Thread {
         &mut self,
         text: impl Into<String>,
         context: Vec<ContextSnapshot>,
+        checkpoint: Option<GitStoreCheckpoint>,
         cx: &mut Context<Self>,
     ) -> MessageId {
         let message_id = self.insert_message(Role::User, text, cx);
@@ -314,6 +415,9 @@ impl Thread {
         self.context
             .extend(context.into_iter().map(|context| (context.id, context)));
         self.context_by_message.insert(message_id, context_ids);
+        if let Some(checkpoint) = checkpoint {
+            self.checkpoints_by_message.insert(message_id, checkpoint);
+        }
         message_id
     }
 
@@ -386,9 +490,9 @@ impl Thread {
     /// Serializes this thread into a format for storage or telemetry.
     pub fn serialize(&self, cx: &mut Context<Self>) -> Task<Result<SerializedThread>> {
         let initial_project_snapshot = self.initial_project_snapshot.clone();
-        cx.spawn(|this, cx| async move {
+        cx.spawn(async move |this, cx| {
             let initial_project_snapshot = initial_project_snapshot.await;
-            this.read_with(&cx, |this, _| SerializedThread {
+            this.read_with(cx, |this, cx| SerializedThread {
                 summary: this.summary_or_default(),
                 updated_at: this.updated_at(),
                 messages: this
@@ -398,9 +502,9 @@ impl Thread {
                         role: message.role,
                         text: message.text.clone(),
                         tool_uses: this
-                            .tool_uses_for_message(message.id)
+                            .tool_uses_for_message(message.id, cx)
                             .into_iter()
-                            .chain(this.scripting_tool_uses_for_message(message.id))
+                            .chain(this.scripting_tool_uses_for_message(message.id, cx))
                             .map(|tool_use| SerializedToolUse {
                                 id: tool_use.id,
                                 name: tool_use.name,
@@ -424,6 +528,116 @@ impl Thread {
         })
     }
 
+    pub fn set_system_prompt_context(&mut self, context: AssistantSystemPromptContext) {
+        self.system_prompt_context = Some(context);
+    }
+
+    pub fn system_prompt_context(&self) -> &Option<AssistantSystemPromptContext> {
+        &self.system_prompt_context
+    }
+
+    pub fn load_system_prompt_context(
+        &self,
+        cx: &App,
+    ) -> Task<(AssistantSystemPromptContext, Option<ThreadError>)> {
+        let project = self.project.read(cx);
+        let tasks = project
+            .visible_worktrees(cx)
+            .map(|worktree| {
+                Self::load_worktree_info_for_system_prompt(
+                    project.fs().clone(),
+                    worktree.read(cx),
+                    cx,
+                )
+            })
+            .collect::<Vec<_>>();
+
+        cx.spawn(async |_cx| {
+            let results = futures::future::join_all(tasks).await;
+            let mut first_err = None;
+            let worktrees = results
+                .into_iter()
+                .map(|(worktree, err)| {
+                    if first_err.is_none() && err.is_some() {
+                        first_err = err;
+                    }
+                    worktree
+                })
+                .collect::<Vec<_>>();
+            (AssistantSystemPromptContext::new(worktrees), first_err)
+        })
+    }
+
+    fn load_worktree_info_for_system_prompt(
+        fs: Arc<dyn Fs>,
+        worktree: &Worktree,
+        cx: &App,
+    ) -> Task<(WorktreeInfoForSystemPrompt, Option<ThreadError>)> {
+        let root_name = worktree.root_name().into();
+        let abs_path = worktree.abs_path();
+
+        // Note that Cline supports `.clinerules` being a directory, but that is not currently
+        // supported. This doesn't seem to occur often in GitHub repositories.
+        const RULES_FILE_NAMES: [&'static str; 5] = [
+            ".rules",
+            ".cursorrules",
+            ".windsurfrules",
+            ".clinerules",
+            "CLAUDE.md",
+        ];
+        let selected_rules_file = RULES_FILE_NAMES
+            .into_iter()
+            .filter_map(|name| {
+                worktree
+                    .entry_for_path(name)
+                    .filter(|entry| entry.is_file())
+                    .map(|entry| (entry.path.clone(), worktree.absolutize(&entry.path)))
+            })
+            .next();
+
+        if let Some((rel_rules_path, abs_rules_path)) = selected_rules_file {
+            cx.spawn(async move |_| {
+                let rules_file_result = maybe!(async move {
+                    let abs_rules_path = abs_rules_path?;
+                    let text = fs.load(&abs_rules_path).await.with_context(|| {
+                        format!("Failed to load assistant rules file {:?}", abs_rules_path)
+                    })?;
+                    anyhow::Ok(RulesFile {
+                        rel_path: rel_rules_path,
+                        abs_path: abs_rules_path.into(),
+                        text: text.trim().to_string(),
+                    })
+                })
+                .await;
+                let (rules_file, rules_file_error) = match rules_file_result {
+                    Ok(rules_file) => (Some(rules_file), None),
+                    Err(err) => (
+                        None,
+                        Some(ThreadError::Message {
+                            header: "Error loading rules file".into(),
+                            message: format!("{err}").into(),
+                        }),
+                    ),
+                };
+                let worktree_info = WorktreeInfoForSystemPrompt {
+                    root_name,
+                    abs_path,
+                    rules_file,
+                };
+                (worktree_info, rules_file_error)
+            })
+        } else {
+            Task::ready((
+                WorktreeInfoForSystemPrompt {
+                    root_name,
+                    abs_path,
+                    rules_file: None,
+                },
+                None,
+            ))
+        }
+    }
+
     pub fn send_to_model(
         &mut self,
         model: Arc<dyn LanguageModel>,
@@ -461,36 +675,30 @@ impl Thread {
         request_kind: RequestKind,
         cx: &App,
     ) -> LanguageModelRequest {
-        let worktree_root_names = self
-            .project
-            .read(cx)
-            .visible_worktrees(cx)
-            .map(|worktree| {
-                let worktree = worktree.read(cx);
-                AssistantSystemPromptWorktree {
-                    root_name: worktree.root_name().into(),
-                    abs_path: worktree.abs_path(),
-                }
-            })
-            .collect::<Vec<_>>();
-        let system_prompt = self
-            .prompt_builder
-            .generate_assistant_system_prompt(worktree_root_names)
-            .context("failed to generate assistant system prompt")
-            .log_err()
-            .unwrap_or_default();
-
         let mut request = LanguageModelRequest {
-            messages: vec![LanguageModelRequestMessage {
-                role: Role::System,
-                content: vec![MessageContent::Text(system_prompt)],
-                cache: true,
-            }],
+            messages: vec![],
             tools: Vec::new(),
             stop: Vec::new(),
             temperature: None,
         };
 
+        if let Some(system_prompt_context) = self.system_prompt_context.as_ref() {
+            if let Some(system_prompt) = self
+                .prompt_builder
+                .generate_assistant_system_prompt(system_prompt_context)
+                .context("failed to generate assistant system prompt")
+                .log_err()
+            {
+                request.messages.push(LanguageModelRequestMessage {
+                    role: Role::System,
+                    content: vec![MessageContent::Text(system_prompt)],
+                    cache: true,
+                });
+            }
+        } else {
+            log::error!("system_prompt_context not set.")
+        }
+
         let mut referenced_context_ids = HashSet::default();
 
         for message in &self.messages {
@@ -553,9 +761,39 @@ impl Thread {
             request.messages.push(context_message);
         }
 
+        self.attach_stale_files(&mut request.messages, cx);
+
         request
     }
 
+    fn attach_stale_files(&self, messages: &mut Vec<LanguageModelRequestMessage>, cx: &App) {
+        const STALE_FILES_HEADER: &str = "These files changed since last read:";
+
+        let mut stale_message = String::new();
+
+        for stale_file in self.action_log.read(cx).stale_buffers(cx) {
+            let Some(file) = stale_file.read(cx).file() else {
+                continue;
+            };
+
+            if stale_message.is_empty() {
+                write!(&mut stale_message, "{}", STALE_FILES_HEADER).ok();
+            }
+
+            writeln!(&mut stale_message, "- {}", file.path().display()).ok();
+        }
+
+        if !stale_message.is_empty() {
+            let context_message = LanguageModelRequestMessage {
+                role: Role::User,
+                content: vec![stale_message.into()],
+                cache: false,
+            };
+
+            messages.push(context_message);
+        }
+    }
+
     pub fn stream_completion(
         &mut self,
         request: LanguageModelRequest,
@@ -564,8 +802,10 @@ impl Thread {
     ) {
         let pending_completion_id = post_inc(&mut self.completion_count);
 
-        let task = cx.spawn(|thread, mut cx| async move {
+        let task = cx.spawn(async move |thread, cx| {
             let stream = model.stream_completion(request, &cx);
+            let initial_token_usage =
+                thread.read_with(cx, |thread, _cx| thread.cumulative_token_usage.clone());
             let stream_completion = async {
                 let mut events = stream.await?;
                 let mut stop_reason = StopReason::EndTurn;
@@ -574,7 +814,7 @@ impl Thread {
                 while let Some(event) = events.next().await {
                     let event = event?;
 
-                    thread.update(&mut cx, |thread, cx| {
+                    thread.update(cx, |thread, cx| {
                         match event {
                             LanguageModelCompletionEvent::StartMessage { .. } => {
                                 thread.insert_message(Role::Assistant, String::new(), cx);
@@ -613,13 +853,17 @@ impl Thread {
                                     .rfind(|message| message.role == Role::Assistant)
                                 {
                                     if tool_use.name.as_ref() == ScriptingTool::NAME {
-                                        thread
-                                            .scripting_tool_use
-                                            .request_tool_use(last_assistant_message.id, tool_use);
+                                        thread.scripting_tool_use.request_tool_use(
+                                            last_assistant_message.id,
+                                            tool_use,
+                                            cx,
+                                        );
                                     } else {
-                                        thread
-                                            .tool_use
-                                            .request_tool_use(last_assistant_message.id, tool_use);
+                                        thread.tool_use.request_tool_use(
+                                            last_assistant_message.id,
+                                            tool_use,
+                                            cx,
+                                        );
                                     }
                                 }
                             }
@@ -633,7 +877,7 @@ impl Thread {
                     smol::future::yield_now().await;
                 }
 
-                thread.update(&mut cx, |thread, cx| {
+                thread.update(cx, |thread, cx| {
                     thread
                         .pending_completions
                         .retain(|completion| completion.id != pending_completion_id);
@@ -649,31 +893,52 @@ impl Thread {
             let result = stream_completion.await;
 
             thread
-                .update(&mut cx, |thread, cx| match result.as_ref() {
-                    Ok(stop_reason) => match stop_reason {
-                        StopReason::ToolUse => {
-                            cx.emit(ThreadEvent::UsePendingTools);
-                        }
-                        StopReason::EndTurn => {}
-                        StopReason::MaxTokens => {}
-                    },
-                    Err(error) => {
-                        if error.is::<PaymentRequiredError>() {
-                            cx.emit(ThreadEvent::ShowError(ThreadError::PaymentRequired));
-                        } else if error.is::<MaxMonthlySpendReachedError>() {
-                            cx.emit(ThreadEvent::ShowError(ThreadError::MaxMonthlySpendReached));
-                        } else {
-                            let error_message = error
-                                .chain()
-                                .map(|err| err.to_string())
-                                .collect::<Vec<_>>()
-                                .join("\n");
-                            cx.emit(ThreadEvent::ShowError(ThreadError::Message(
-                                SharedString::from(error_message.clone()),
-                            )));
-                        }
+                .update(cx, |thread, cx| {
+                    match result.as_ref() {
+                        Ok(stop_reason) => match stop_reason {
+                            StopReason::ToolUse => {
+                                cx.emit(ThreadEvent::UsePendingTools);
+                            }
+                            StopReason::EndTurn => {}
+                            StopReason::MaxTokens => {}
+                        },
+                        Err(error) => {
+                            if error.is::<PaymentRequiredError>() {
+                                cx.emit(ThreadEvent::ShowError(ThreadError::PaymentRequired));
+                            } else if error.is::<MaxMonthlySpendReachedError>() {
+                                cx.emit(ThreadEvent::ShowError(
+                                    ThreadError::MaxMonthlySpendReached,
+                                ));
+                            } else {
+                                let error_message = error
+                                    .chain()
+                                    .map(|err| err.to_string())
+                                    .collect::<Vec<_>>()
+                                    .join("\n");
+                                cx.emit(ThreadEvent::ShowError(ThreadError::Message {
+                                    header: "Error interacting with language model".into(),
+                                    message: SharedString::from(error_message.clone()),
+                                }));
+                            }
 
-                        thread.cancel_last_completion();
+                            thread.cancel_last_completion(cx);
+                        }
+                    }
+                    cx.emit(ThreadEvent::DoneStreaming);
+
+                    if let Ok(initial_usage) = initial_token_usage {
+                        let usage = thread.cumulative_token_usage.clone() - initial_usage;
+
+                        telemetry::event!(
+                            "Assistant Thread Completion",
+                            thread_id = thread.id().to_string(),
+                            model = model.telemetry_id(),
+                            model_provider = model.provider_id().to_string(),
+                            input_tokens = usage.input_tokens,
+                            output_tokens = usage.output_tokens,
+                            cache_creation_input_tokens = usage.cache_creation_input_tokens,
+                            cache_read_input_tokens = usage.cache_read_input_tokens,
+                        );
                     }
                 })
                 .ok();
@@ -707,7 +972,7 @@ impl Thread {
             cache: false,
         });
 
-        self.pending_summary = cx.spawn(|this, mut cx| {
+        self.pending_summary = cx.spawn(async move |this, cx| {
             async move {
                 let stream = model.stream_completion_text(request, &cx);
                 let mut messages = stream.await?;
@@ -724,7 +989,7 @@ impl Thread {
                     }
                 }
 
-                this.update(&mut cx, |this, cx| {
+                this.update(cx, |this, cx| {
                     if !new_summary.is_empty() {
                         this.summary = Some(new_summary.into());
                     }
@@ -735,10 +1000,14 @@ impl Thread {
                 anyhow::Ok(())
             }
             .log_err()
+            .await
         });
     }
 
-    pub fn use_pending_tools(&mut self, cx: &mut Context<Self>) {
+    pub fn use_pending_tools(
+        &mut self,
+        cx: &mut Context<Self>,
+    ) -> impl IntoIterator<Item = PendingToolUse> {
         let request = self.to_completion_request(RequestKind::Chat, cx);
         let pending_tool_uses = self
             .tool_use
@@ -748,11 +1017,22 @@ impl Thread {
             .cloned()
             .collect::<Vec<_>>();
 
-        for tool_use in pending_tool_uses {
+        for tool_use in pending_tool_uses.iter() {
             if let Some(tool) = self.tools.tool(&tool_use.name, cx) {
-                let task = tool.run(tool_use.input, &request.messages, self.project.clone(), cx);
+                let task = tool.run(
+                    tool_use.input.clone(),
+                    &request.messages,
+                    self.project.clone(),
+                    self.action_log.clone(),
+                    cx,
+                );
 
-                self.insert_tool_output(tool_use.id.clone(), task, cx);
+                self.insert_tool_output(
+                    tool_use.id.clone(),
+                    tool_use.ui_text.clone().into(),
+                    task,
+                    cx,
+                );
             }
         }
 
@@ -764,8 +1044,8 @@ impl Thread {
             .cloned()
             .collect::<Vec<_>>();
 
-        for scripting_tool_use in pending_scripting_tool_uses {
-            let task = match ScriptingTool::deserialize_input(scripting_tool_use.input) {
+        for scripting_tool_use in pending_scripting_tool_uses.iter() {
+            let task = match ScriptingTool::deserialize_input(scripting_tool_use.input.clone()) {
                 Err(err) => Task::ready(Err(err.into())),
                 Ok(input) => {
                     let (script_id, script_task) =
@@ -774,10 +1054,10 @@ impl Thread {
                         });
 
                     let session = self.scripting_session.clone();
-                    cx.spawn(|_, cx| async move {
+                    cx.spawn(async move |_, cx| {
                         script_task.await;
 
-                        let message = session.read_with(&cx, |session, _cx| {
+                        let message = session.read_with(cx, |session, _cx| {
                             // Using a id to get the script output seems impractical.
                             // Why not just include it in the Task result?
                             // This is because we'll later report the script state as it runs,
@@ -792,22 +1072,29 @@ impl Thread {
                 }
             };
 
-            self.insert_scripting_tool_output(scripting_tool_use.id.clone(), task, cx);
+            let ui_text: SharedString = scripting_tool_use.name.clone().into();
+
+            self.insert_scripting_tool_output(scripting_tool_use.id.clone(), ui_text, task, cx);
         }
+
+        pending_tool_uses
+            .into_iter()
+            .chain(pending_scripting_tool_uses)
     }
 
     pub fn insert_tool_output(
         &mut self,
         tool_use_id: LanguageModelToolUseId,
+        ui_text: SharedString,
         output: Task<Result<String>>,
         cx: &mut Context<Self>,
     ) {
-        let insert_output_task = cx.spawn(|thread, mut cx| {
+        let insert_output_task = cx.spawn({
             let tool_use_id = tool_use_id.clone();
-            async move {
+            async move |thread, cx| {
                 let output = output.await;
                 thread
-                    .update(&mut cx, |thread, cx| {
+                    .update(cx, |thread, cx| {
                         let pending_tool_use = thread
                             .tool_use
                             .insert_tool_output(tool_use_id.clone(), output);
@@ -815,6 +1102,7 @@ impl Thread {
                         cx.emit(ThreadEvent::ToolFinished {
                             tool_use_id,
                             pending_tool_use,
+                            canceled: false,
                         });
                     })
                     .ok();
@@ -822,21 +1110,22 @@ impl Thread {
         });
 
         self.tool_use
-            .run_pending_tool(tool_use_id, insert_output_task);
+            .run_pending_tool(tool_use_id, ui_text, insert_output_task);
     }
 
     pub fn insert_scripting_tool_output(
         &mut self,
         tool_use_id: LanguageModelToolUseId,
+        ui_text: SharedString,
         output: Task<Result<String>>,
         cx: &mut Context<Self>,
     ) {
-        let insert_output_task = cx.spawn(|thread, mut cx| {
+        let insert_output_task = cx.spawn({
             let tool_use_id = tool_use_id.clone();
-            async move {
+            async move |thread, cx| {
                 let output = output.await;
                 thread
-                    .update(&mut cx, |thread, cx| {
+                    .update(cx, |thread, cx| {
                         let pending_tool_use = thread
                             .scripting_tool_use
                             .insert_tool_output(tool_use_id.clone(), output);
@@ -844,6 +1133,7 @@ impl Thread {
                         cx.emit(ThreadEvent::ToolFinished {
                             tool_use_id,
                             pending_tool_use,
+                            canceled: false,
                         });
                     })
                     .ok();
@@ -851,14 +1141,20 @@ impl Thread {
         });
 
         self.scripting_tool_use
-            .run_pending_tool(tool_use_id, insert_output_task);
+            .run_pending_tool(tool_use_id, ui_text, insert_output_task);
     }
 
-    pub fn send_tool_results_to_model(
+    pub fn attach_tool_results(
         &mut self,
-        model: Arc<dyn LanguageModel>,
+        updated_context: Vec<ContextSnapshot>,
         cx: &mut Context<Self>,
     ) {
+        self.context.extend(
+            updated_context
+                .into_iter()
+                .map(|context| (context.id, context)),
+        );
+
         // Insert a user message to contain the tool results.
         self.insert_user_message(
             // TODO: Sending up a user message without any content results in the model sending back
@@ -866,19 +1162,28 @@ impl Thread {
             // so for now we provide some text to keep the model on track.
             "Here are the tool results.",
             Vec::new(),
+            None,
             cx,
         );
-        self.send_to_model(model, RequestKind::Chat, cx);
     }
 
     /// Cancels the last pending completion, if there are any pending.
     ///
     /// Returns whether a completion was canceled.
-    pub fn cancel_last_completion(&mut self) -> bool {
-        if let Some(_last_completion) = self.pending_completions.pop() {
+    pub fn cancel_last_completion(&mut self, cx: &mut Context<Self>) -> bool {
+        if self.pending_completions.pop().is_some() {
             true
         } else {
-            false
+            let mut canceled = false;
+            for pending_tool_use in self.tool_use.cancel_pending() {
+                canceled = true;
+                cx.emit(ThreadEvent::ToolFinished {
+                    tool_use_id: pending_tool_use.id.clone(),
+                    pending_tool_use: Some(pending_tool_use),
+                    canceled: true,
+                });
+            }
+            canceled
         }
     }
 
@@ -914,13 +1219,14 @@ impl Thread {
         project: Entity<Project>,
         cx: &mut Context<Self>,
     ) -> Task<Arc<ProjectSnapshot>> {
+        let git_store = project.read(cx).git_store().clone();
         let worktree_snapshots: Vec<_> = project
             .read(cx)
             .visible_worktrees(cx)
-            .map(|worktree| Self::worktree_snapshot(worktree, cx))
+            .map(|worktree| Self::worktree_snapshot(worktree, git_store.clone(), cx))
             .collect();
 
-        cx.spawn(move |_, cx| async move {
+        cx.spawn(async move |_, cx| {
             let worktree_snapshots = futures::future::join_all(worktree_snapshots).await;
 
             let mut unsaved_buffers = Vec::new();
@@ -946,8 +1252,12 @@ impl Thread {
         })
     }
 
-    fn worktree_snapshot(worktree: Entity<project::Worktree>, cx: &App) -> Task<WorktreeSnapshot> {
-        cx.spawn(move |cx| async move {
+    fn worktree_snapshot(
+        worktree: Entity<project::Worktree>,
+        git_store: Entity<GitStore>,
+        cx: &App,
+    ) -> Task<WorktreeSnapshot> {
+        cx.spawn(async move |cx| {
             // Get worktree path and snapshot
             let worktree_info = cx.update(|app_cx| {
                 let worktree = worktree.read(app_cx);
@@ -963,42 +1273,40 @@ impl Thread {
                 };
             };
 
+            let repo_info = git_store
+                .update(cx, |git_store, cx| {
+                    git_store
+                        .repositories()
+                        .values()
+                        .find(|repo| repo.read(cx).worktree_id == snapshot.id())
+                        .and_then(|repo| {
+                            let repo = repo.read(cx);
+                            Some((repo.branch().cloned(), repo.local_repository()?))
+                        })
+                })
+                .ok()
+                .flatten();
+
             // Extract git information
-            let git_state = match snapshot.repositories().first() {
+            let git_state = match repo_info {
                 None => None,
-                Some(repo_entry) => {
-                    // Get branch information
-                    let current_branch = repo_entry.branch().map(|branch| branch.name.to_string());
+                Some((branch, repo)) => {
+                    let current_branch = branch.map(|branch| branch.name.to_string());
+                    let remote_url = repo.remote_url("origin");
+                    let head_sha = repo.head_sha();
 
-                    // Get repository info
-                    let repo_result = worktree.read_with(&cx, |worktree, _cx| {
-                        if let project::Worktree::Local(local_worktree) = &worktree {
-                            local_worktree.get_local_repo(repo_entry).map(|local_repo| {
-                                let repo = local_repo.repo();
-                                (repo.remote_url("origin"), repo.head_sha(), repo.clone())
-                            })
-                        } else {
-                            None
-                        }
-                    });
+                    // Get diff asynchronously
+                    let diff = repo
+                        .diff(git::repository::DiffType::HeadToWorktree, cx.clone())
+                        .await
+                        .ok();
 
-                    match repo_result {
-                        Ok(Some((remote_url, head_sha, repository))) => {
-                            // Get diff asynchronously
-                            let diff = repository
-                                .diff(git::repository::DiffType::HeadToWorktree, cx)
-                                .await
-                                .ok();
-
-                            Some(GitState {
-                                remote_url,
-                                head_sha,
-                                current_branch,
-                                diff,
-                            })
-                        }
-                        Err(_) | Ok(None) => None,
-                    }
+                    Some(GitState {
+                        remote_url,
+                        head_sha,
+                        current_branch,
+                        diff,
+                    })
                 }
             };
 
@@ -1009,7 +1317,7 @@ impl Thread {
         })
     }
 
-    pub fn to_markdown(&self) -> Result<String> {
+    pub fn to_markdown(&self, cx: &App) -> Result<String> {
         let mut markdown = Vec::new();
 
         if let Some(summary) = self.summary() {
@@ -1028,7 +1336,7 @@ impl Thread {
             )?;
             writeln!(markdown, "{}\n", message.text)?;
 
-            for tool_use in self.tool_uses_for_message(message.id) {
+            for tool_use in self.tool_uses_for_message(message.id, cx) {
                 writeln!(
                     markdown,
                     "**Use Tool: {} ({})**",
@@ -1057,6 +1365,14 @@ impl Thread {
         Ok(String::from_utf8_lossy(&markdown).to_string())
     }
 
+    pub fn action_log(&self) -> &Entity<ActionLog> {
+        &self.action_log
+    }
+
+    pub fn project(&self) -> &Entity<Project> {
+        &self.project
+    }
+
     pub fn cumulative_token_usage(&self) -> TokenUsage {
         self.cumulative_token_usage.clone()
     }
@@ -1066,7 +1382,10 @@ impl Thread {
 pub enum ThreadError {
     PaymentRequired,
     MaxMonthlySpendReached,
-    Message(SharedString),
+    Message {
+        header: SharedString,
+        message: SharedString,
+    },
 }
 
 #[derive(Debug, Clone)]
@@ -1074,6 +1393,7 @@ pub enum ThreadEvent {
     ShowError(ThreadError),
     StreamedCompletion,
     StreamedAssistantText(MessageId, String),
+    DoneStreaming,
     MessageAdded(MessageId),
     MessageEdited(MessageId),
     MessageDeleted(MessageId),
@@ -1084,7 +1404,10 @@ pub enum ThreadEvent {
         tool_use_id: LanguageModelToolUseId,
         /// The pending tool use that corresponds to this tool.
         pending_tool_use: Option<PendingToolUse>,
+        /// Whether the tool was canceled by the user.
+        canceled: bool,
     },
+    CheckpointChanged,
 }
 
 impl EventEmitter<ThreadEvent> for Thread {}

crates/assistant2/src/thread_store.rs

@@ -20,7 +20,7 @@ use prompt_store::PromptBuilder;
 use serde::{Deserialize, Serialize};
 use util::ResultExt as _;
 
-use crate::thread::{MessageId, ProjectSnapshot, Thread, ThreadId};
+use crate::thread::{MessageId, ProjectSnapshot, Thread, ThreadEvent, ThreadId};
 
 pub fn init(cx: &mut App) {
     ThreadsDatabase::init(cx);
@@ -65,6 +65,14 @@ impl ThreadStore {
         Ok(this)
     }
 
+    pub fn context_server_manager(&self) -> Entity<ContextServerManager> {
+        self.context_server_manager.clone()
+    }
+
+    pub fn tools(&self) -> Arc<ToolWorkingSet> {
+        self.tools.clone()
+    }
+
     /// Returns the number of threads.
     pub fn thread_count(&self) -> usize {
         self.threads.len()
@@ -98,14 +106,14 @@ impl ThreadStore {
     ) -> Task<Result<Entity<Thread>>> {
         let id = id.clone();
         let database_future = ThreadsDatabase::global_future(cx);
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let database = database_future.await.map_err(|err| anyhow!(err))?;
             let thread = database
                 .try_find_thread(id.clone())
                 .await?
                 .ok_or_else(|| anyhow!("no thread found with ID: {id:?}"))?;
 
-            this.update(&mut cx, |this, cx| {
+            let thread = this.update(cx, |this, cx| {
                 cx.new(|cx| {
                     Thread::deserialize(
                         id.clone(),
@@ -116,7 +124,19 @@ impl ThreadStore {
                         cx,
                     )
                 })
-            })
+            })?;
+
+            let (system_prompt_context, load_error) = thread
+                .update(cx, |thread, cx| thread.load_system_prompt_context(cx))?
+                .await;
+            thread.update(cx, |thread, cx| {
+                thread.set_system_prompt_context(system_prompt_context);
+                if let Some(load_error) = load_error {
+                    cx.emit(ThreadEvent::ShowError(load_error));
+                }
+            })?;
+
+            Ok(thread)
         })
     }
 
@@ -125,23 +145,23 @@ impl ThreadStore {
             thread.update(cx, |thread, cx| (thread.id().clone(), thread.serialize(cx)));
 
         let database_future = ThreadsDatabase::global_future(cx);
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let serialized_thread = serialized_thread.await?;
             let database = database_future.await.map_err(|err| anyhow!(err))?;
             database.save_thread(metadata, serialized_thread).await?;
 
-            this.update(&mut cx, |this, cx| this.reload(cx))?.await
+            this.update(cx, |this, cx| this.reload(cx))?.await
         })
     }
 
     pub fn delete_thread(&mut self, id: &ThreadId, cx: &mut Context<Self>) -> Task<Result<()>> {
         let id = id.clone();
         let database_future = ThreadsDatabase::global_future(cx);
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let database = database_future.await.map_err(|err| anyhow!(err))?;
             database.delete_thread(id.clone()).await?;
 
-            this.update(&mut cx, |this, _cx| {
+            this.update(cx, |this, _cx| {
                 this.threads.retain(|thread| thread.id != id)
             })
         })
@@ -149,14 +169,14 @@ impl ThreadStore {
 
     pub fn reload(&self, cx: &mut Context<Self>) -> Task<Result<()>> {
         let database_future = ThreadsDatabase::global_future(cx);
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let threads = database_future
                 .await
                 .map_err(|err| anyhow!(err))?
                 .list_threads()
                 .await?;
 
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 this.threads = threads;
                 cx.notify();
             })
@@ -185,7 +205,7 @@ impl ThreadStore {
                     cx.spawn({
                         let server = server.clone();
                         let server_id = server_id.clone();
-                        |this, mut cx| async move {
+                        async move |this, cx| {
                             let Some(protocol) = server.client() else {
                                 return;
                             };
@@ -210,7 +230,7 @@ impl ThreadStore {
                                         })
                                         .collect::<Vec<_>>();
 
-                                    this.update(&mut cx, |this, _cx| {
+                                    this.update(cx, |this, _cx| {
                                         this.context_server_tool_ids.insert(server_id, tool_ids);
                                     })
                                     .log_err();

crates/assistant2/src/tool_selector.rs

@@ -1,17 +1,50 @@
 use std::sync::Arc;
 
+use assistant_settings::{AgentProfile, AssistantSettings};
 use assistant_tool::{ToolSource, ToolWorkingSet};
-use gpui::Entity;
+use collections::HashMap;
+use gpui::{Entity, Subscription};
 use scripting_tool::ScriptingTool;
+use settings::{Settings as _, SettingsStore};
 use ui::{prelude::*, ContextMenu, PopoverMenu, Tooltip};
 
 pub struct ToolSelector {
+    profiles: HashMap<Arc<str>, AgentProfile>,
     tools: Arc<ToolWorkingSet>,
+    _subscriptions: Vec<Subscription>,
 }
 
 impl ToolSelector {
-    pub fn new(tools: Arc<ToolWorkingSet>, _cx: &mut Context<Self>) -> Self {
-        Self { tools }
+    pub fn new(tools: Arc<ToolWorkingSet>, cx: &mut Context<Self>) -> Self {
+        let settings_subscription = cx.observe_global::<SettingsStore>(move |this, cx| {
+            this.refresh_profiles(cx);
+        });
+
+        let mut this = Self {
+            profiles: HashMap::default(),
+            tools,
+            _subscriptions: vec![settings_subscription],
+        };
+        this.refresh_profiles(cx);
+
+        this
+    }
+
+    fn refresh_profiles(&mut self, cx: &mut Context<Self>) {
+        let settings = AssistantSettings::get_global(cx);
+        let mut profiles = settings.profiles.clone();
+
+        let read_only = AgentProfile::read_only();
+        if !profiles.contains_key(read_only.name.as_ref()) {
+            profiles.insert(read_only.name.clone().into(), read_only);
+        }
+
+        let code_writer = AgentProfile::code_writer();
+        if !profiles.contains_key(code_writer.name.as_ref()) {
+            profiles.insert(code_writer.name.clone().into(), code_writer);
+        }
+
+        self.profiles = profiles;
     }
 
     fn build_context_menu(
@@ -19,13 +52,40 @@ impl ToolSelector {
         window: &mut Window,
         cx: &mut Context<Self>,
     ) -> Entity<ContextMenu> {
-        ContextMenu::build(window, cx, |mut menu, _window, cx| {
+        let profiles = self.profiles.clone();
+        let tool_set = self.tools.clone();
+        ContextMenu::build_persistent(window, cx, move |mut menu, _window, cx| {
             let icon_position = IconPosition::End;
-            let tools_by_source = self.tools.tools_by_source(cx);
 
-            let all_tools_enabled = self.tools.are_all_tools_enabled();
+            menu = menu.header("Profiles");
+            for (_id, profile) in profiles.clone() {
+                menu = menu.toggleable_entry(profile.name.clone(), false, icon_position, None, {
+                    let tools = tool_set.clone();
+                    move |_window, cx| {
+                        tools.disable_source(ToolSource::Native, cx);
+                        tools.enable(
+                            ToolSource::Native,
+                            &profile
+                                .tools
+                                .iter()
+                                .filter_map(|(tool, enabled)| enabled.then(|| tool.clone()))
+                                .collect::<Vec<_>>(),
+                        );
+
+                        if profile.tools.contains_key(ScriptingTool::NAME) {
+                            tools.enable_scripting_tool();
+                        }
+                    }
+                });
+            }
+
+            menu = menu.separator();
+
+            let tools_by_source = tool_set.tools_by_source(cx);
+
+            let all_tools_enabled = tool_set.are_all_tools_enabled();
             menu = menu.toggleable_entry("All Tools", all_tools_enabled, icon_position, None, {
-                let tools = self.tools.clone();
+                let tools = tool_set.clone();
                 move |_window, cx| {
                     if all_tools_enabled {
                         tools.disable_all_tools(cx);
@@ -41,7 +101,7 @@ impl ToolSelector {
                     .map(|tool| {
                         let source = tool.source();
                         let name = tool.name().into();
-                        let is_enabled = self.tools.is_enabled(&source, &name);
+                        let is_enabled = tool_set.is_enabled(&source, &name);
 
                         (source, name, is_enabled)
                     })
@@ -51,7 +111,7 @@ impl ToolSelector {
                     tools.push((
                         ToolSource::Native,
                         ScriptingTool::NAME.into(),
-                        self.tools.is_scripting_tool_enabled(),
+                        tool_set.is_scripting_tool_enabled(),
                     ));
                     tools.sort_by(|(_, name_a, _), (_, name_b, _)| name_a.cmp(name_b));
                 }
@@ -60,7 +120,7 @@ impl ToolSelector {
                     ToolSource::Native => menu.separator().header("Zed Tools"),
                     ToolSource::ContextServer { id } => {
                         let all_tools_from_source_enabled =
-                            self.tools.are_all_tools_from_source_enabled(&source);
+                            tool_set.are_all_tools_from_source_enabled(&source);
 
                         menu.separator().header(id).toggleable_entry(
                             "All Tools",
@@ -68,7 +128,7 @@ impl ToolSelector {
                             icon_position,
                             None,
                             {
-                                let tools = self.tools.clone();
+                                let tools = tool_set.clone();
                                 let source = source.clone();
                                 move |_window, cx| {
                                     if all_tools_from_source_enabled {
@@ -84,7 +144,7 @@ impl ToolSelector {
 
                 for (source, name, is_enabled) in tools {
                     menu = menu.toggleable_entry(name.clone(), is_enabled, icon_position, None, {
-                        let tools = self.tools.clone();
+                        let tools = tool_set.clone();
                         move |_window, _cx| {
                             if name.as_ref() == ScriptingTool::NAME {
                                 if is_enabled {

crates/assistant2/src/tool_use.rs

@@ -1,10 +1,11 @@
 use std::sync::Arc;
 
 use anyhow::Result;
+use assistant_tool::ToolWorkingSet;
 use collections::HashMap;
 use futures::future::Shared;
 use futures::FutureExt as _;
-use gpui::{SharedString, Task};
+use gpui::{App, SharedString, Task};
 use language_model::{
     LanguageModelRequestMessage, LanguageModelToolResult, LanguageModelToolUse,
     LanguageModelToolUseId, MessageContent, Role,
@@ -17,6 +18,7 @@ use crate::thread_store::SerializedMessage;
 pub struct ToolUse {
     pub id: LanguageModelToolUseId,
     pub name: SharedString,
+    pub ui_text: SharedString,
     pub status: ToolUseStatus,
     pub input: serde_json::Value,
 }
@@ -30,6 +32,7 @@ pub enum ToolUseStatus {
 }
 
 pub struct ToolUseState {
+    tools: Arc<ToolWorkingSet>,
     tool_uses_by_assistant_message: HashMap<MessageId, Vec<LanguageModelToolUse>>,
     tool_uses_by_user_message: HashMap<MessageId, Vec<LanguageModelToolUseId>>,
     tool_results: HashMap<LanguageModelToolUseId, LanguageModelToolResult>,
@@ -37,8 +40,9 @@ pub struct ToolUseState {
 }
 
 impl ToolUseState {
-    pub fn new() -> Self {
+    pub fn new(tools: Arc<ToolWorkingSet>) -> Self {
         Self {
+            tools,
             tool_uses_by_assistant_message: HashMap::default(),
             tool_uses_by_user_message: HashMap::default(),
             tool_results: HashMap::default(),
@@ -50,10 +54,11 @@ impl ToolUseState {
     ///
     /// Accepts a function to filter the tools that should be used to populate the state.
     pub fn from_serialized_messages(
+        tools: Arc<ToolWorkingSet>,
         messages: &[SerializedMessage],
         mut filter_by_tool_name: impl FnMut(&str) -> bool,
     ) -> Self {
-        let mut this = Self::new();
+        let mut this = Self::new(tools);
         let mut tool_names_by_id = HashMap::default();
 
         for message in messages {
@@ -118,11 +123,27 @@ impl ToolUseState {
         this
     }
 
+    pub fn cancel_pending(&mut self) -> Vec<PendingToolUse> {
+        let mut pending_tools = Vec::new();
+        for (tool_use_id, tool_use) in self.pending_tool_uses_by_id.drain() {
+            self.tool_results.insert(
+                tool_use_id.clone(),
+                LanguageModelToolResult {
+                    tool_use_id,
+                    content: "Tool canceled by user".into(),
+                    is_error: true,
+                },
+            );
+            pending_tools.push(tool_use.clone());
+        }
+        pending_tools
+    }
+
     pub fn pending_tool_uses(&self) -> Vec<&PendingToolUse> {
         self.pending_tool_uses_by_id.values().collect()
     }
 
-    pub fn tool_uses_for_message(&self, id: MessageId) -> Vec<ToolUse> {
+    pub fn tool_uses_for_message(&self, id: MessageId, cx: &App) -> Vec<ToolUse> {
         let Some(tool_uses_for_message) = &self.tool_uses_by_assistant_message.get(&id) else {
             return Vec::new();
         };
@@ -157,6 +178,7 @@ impl ToolUseState {
             tool_uses.push(ToolUse {
                 id: tool_use.id.clone(),
                 name: tool_use.name.clone().into(),
+                ui_text: self.tool_ui_label(&tool_use.name, &tool_use.input, cx),
                 input: tool_use.input.clone(),
                 status,
             })
@@ -165,6 +187,19 @@ impl ToolUseState {
         tool_uses
     }
 
+    pub fn tool_ui_label(
+        &self,
+        tool_name: &str,
+        input: &serde_json::Value,
+        cx: &App,
+    ) -> SharedString {
+        if let Some(tool) = self.tools.tool(tool_name, cx) {
+            tool.ui_text(input).into()
+        } else {
+            "Unknown tool".into()
+        }
+    }
+
     pub fn tool_results_for_message(&self, message_id: MessageId) -> Vec<&LanguageModelToolResult> {
         let empty = Vec::new();
 
@@ -182,10 +217,18 @@ impl ToolUseState {
             .map_or(false, |results| !results.is_empty())
     }
 
+    pub fn tool_result(
+        &self,
+        tool_use_id: &LanguageModelToolUseId,
+    ) -> Option<&LanguageModelToolResult> {
+        self.tool_results.get(tool_use_id)
+    }
+
     pub fn request_tool_use(
         &mut self,
         assistant_message_id: MessageId,
         tool_use: LanguageModelToolUse,
+        cx: &App,
     ) {
         self.tool_uses_by_assistant_message
             .entry(assistant_message_id)
@@ -205,15 +248,24 @@ impl ToolUseState {
             PendingToolUse {
                 assistant_message_id,
                 id: tool_use.id,
-                name: tool_use.name,
+                name: tool_use.name.clone(),
+                ui_text: self
+                    .tool_ui_label(&tool_use.name, &tool_use.input, cx)
+                    .into(),
                 input: tool_use.input,
                 status: PendingToolUseStatus::Idle,
             },
         );
     }
 
-    pub fn run_pending_tool(&mut self, tool_use_id: LanguageModelToolUseId, task: Task<()>) {
+    pub fn run_pending_tool(
+        &mut self,
+        tool_use_id: LanguageModelToolUseId,
+        ui_text: SharedString,
+        task: Task<()>,
+    ) {
         if let Some(tool_use) = self.pending_tool_uses_by_id.get_mut(&tool_use_id) {
+            tool_use.ui_text = ui_text.into();
             tool_use.status = PendingToolUseStatus::Running {
                 _task: task.shared(),
             };
@@ -226,12 +278,12 @@ impl ToolUseState {
         output: Result<String>,
     ) -> Option<PendingToolUse> {
         match output {
-            Ok(output) => {
+            Ok(tool_result) => {
                 self.tool_results.insert(
                     tool_use_id.clone(),
                     LanguageModelToolResult {
                         tool_use_id: tool_use_id.clone(),
-                        content: output.into(),
+                        content: tool_result.into(),
                         is_error: false,
                     },
                 );
@@ -263,9 +315,17 @@ impl ToolUseState {
     ) {
         if let Some(tool_uses) = self.tool_uses_by_assistant_message.get(&message_id) {
             for tool_use in tool_uses {
-                request_message
-                    .content
-                    .push(MessageContent::ToolUse(tool_use.clone()));
+                if self.tool_results.contains_key(&tool_use.id) {
+                    // Do not send tool uses until they are completed
+                    request_message
+                        .content
+                        .push(MessageContent::ToolUse(tool_use.clone()));
+                } else {
+                    log::debug!(
+                        "skipped tool use {:?} because it is still pending",
+                        tool_use
+                    );
+                }
             }
         }
     }
@@ -278,9 +338,19 @@ impl ToolUseState {
         if let Some(tool_uses) = self.tool_uses_by_user_message.get(&message_id) {
             for tool_use_id in tool_uses {
                 if let Some(tool_result) = self.tool_results.get(tool_use_id) {
-                    request_message
-                        .content
-                        .push(MessageContent::ToolResult(tool_result.clone()));
+                    request_message.content.push(MessageContent::ToolResult(
+                        LanguageModelToolResult {
+                            tool_use_id: tool_use_id.clone(),
+                            is_error: tool_result.is_error,
+                            content: if tool_result.content.is_empty() {
+                                // Surprisingly, the API fails if we return an empty string here.
+                                // It thinks we are sending a tool use without a tool result.
+                                "<Tool returned an empty string>".into()
+                            } else {
+                                tool_result.content.clone()
+                            },
+                        },
+                    ));
                 }
             }
         }
@@ -294,6 +364,7 @@ pub struct PendingToolUse {
     #[allow(unused)]
     pub assistant_message_id: MessageId,
     pub name: Arc<str>,
+    pub ui_text: Arc<str>,
     pub input: serde_json::Value,
     pub status: PendingToolUseStatus,
 }

crates/assistant_context_editor/src/context.rs

@@ -1144,9 +1144,9 @@ impl AssistantContext {
 
     fn set_language(&mut self, cx: &mut Context<Self>) {
         let markdown = self.language_registry.language_for_name("Markdown");
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let markdown = markdown.await?;
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 this.buffer
                     .update(cx, |buffer, cx| buffer.set_language(Some(markdown), cx));
             })
@@ -1188,7 +1188,7 @@ impl AssistantContext {
             return;
         };
         let debounce = self.token_count.is_some();
-        self.pending_token_count = cx.spawn(|this, mut cx| {
+        self.pending_token_count = cx.spawn(async move |this, cx| {
             async move {
                 if debounce {
                     cx.background_executor()
@@ -1197,13 +1197,14 @@ impl AssistantContext {
                 }
 
                 let token_count = cx.update(|cx| model.count_tokens(request, cx))?.await?;
-                this.update(&mut cx, |this, cx| {
+                this.update(cx, |this, cx| {
                     this.token_count = Some(token_count);
                     this.start_cache_warming(&model, cx);
                     cx.notify()
                 })
             }
             .log_err()
+            .await
         });
     }
 
@@ -1342,7 +1343,7 @@ impl AssistantContext {
         };
 
         let model = Arc::clone(model);
-        self.pending_cache_warming_task = cx.spawn(|this, mut cx| {
+        self.pending_cache_warming_task = cx.spawn(async move |this, cx| {
             async move {
                 match model.stream_completion(request, &cx).await {
                     Ok(mut stream) => {
@@ -1353,13 +1354,14 @@ impl AssistantContext {
                         log::warn!("Cache warming failed: {}", e);
                     }
                 };
-                this.update(&mut cx, |this, cx| {
+                this.update(cx, |this, cx| {
                     this.update_cache_status_for_completion(cx);
                 })
                 .ok();
                 anyhow::Ok(())
             }
             .log_err()
+            .await
         });
     }
 
@@ -1916,7 +1918,7 @@ impl AssistantContext {
             });
         self.reparse(cx);
 
-        let insert_output_task = cx.spawn(|this, mut cx| async move {
+        let insert_output_task = cx.spawn(async move |this, cx| {
             let run_command = async {
                 let mut stream = output.await?;
 
@@ -1933,7 +1935,7 @@ impl AssistantContext {
 
                 while let Some(event) = stream.next().await {
                     let event = event?;
-                    this.update(&mut cx, |this, cx| {
+                    this.update(cx, |this, cx| {
                         this.buffer.update(cx, |buffer, _cx| {
                             buffer.finalize_last_transaction();
                             buffer.start_transaction()
@@ -2034,7 +2036,7 @@ impl AssistantContext {
                     })?;
                 }
 
-                this.update(&mut cx, |this, cx| {
+                this.update(cx, |this, cx| {
                     this.buffer.update(cx, |buffer, cx| {
                         buffer.finalize_last_transaction();
                         buffer.start_transaction();
@@ -2080,7 +2082,7 @@ impl AssistantContext {
 
             let command_result = run_command.await;
 
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 let version = this.version.clone();
                 let timestamp = this.next_timestamp();
                 let Some(invoked_slash_command) = this.invoked_slash_commands.get_mut(&command_id)
@@ -2210,7 +2212,7 @@ impl AssistantContext {
         let pending_completion_id = post_inc(&mut self.completion_count);
 
         let task = cx.spawn({
-            |this, mut cx| async move {
+            async move |this, cx| {
                 let stream = model.stream_completion(request, &cx);
                 let assistant_message_id = assistant_message.id;
                 let mut response_latency = None;
@@ -2225,7 +2227,7 @@ impl AssistantContext {
                         }
                         let event = event?;
 
-                        this.update(&mut cx, |this, cx| {
+                        this.update(cx, |this, cx| {
                             let message_ix = this
                                 .message_anchors
                                 .iter()
@@ -2264,7 +2266,7 @@ impl AssistantContext {
                         })?;
                         smol::future::yield_now().await;
                     }
-                    this.update(&mut cx, |this, cx| {
+                    this.update(cx, |this, cx| {
                         this.pending_completions
                             .retain(|completion| completion.id != pending_completion_id);
                         this.summarize(false, cx);
@@ -2276,7 +2278,7 @@ impl AssistantContext {
 
                 let result = stream_completion.await;
 
-                this.update(&mut cx, |this, cx| {
+                this.update(cx, |this, cx| {
                     let error_message = if let Some(error) = result.as_ref().err() {
                         if error.is::<PaymentRequiredError>() {
                             cx.emit(ContextEvent::ShowPaymentRequiredError);
@@ -2786,7 +2788,7 @@ impl AssistantContext {
                 cache: false,
             });
 
-            self.pending_summary = cx.spawn(|this, mut cx| {
+            self.pending_summary = cx.spawn(async move |this, cx| {
                 async move {
                     let stream = model.stream_completion_text(request, &cx);
                     let mut messages = stream.await?;
@@ -2795,7 +2797,7 @@ impl AssistantContext {
                     while let Some(message) = messages.stream.next().await {
                         let text = message?;
                         let mut lines = text.lines();
-                        this.update(&mut cx, |this, cx| {
+                        this.update(cx, |this, cx| {
                             let version = this.version.clone();
                             let timestamp = this.next_timestamp();
                             let summary = this.summary.get_or_insert(ContextSummary::default());
@@ -2819,7 +2821,7 @@ impl AssistantContext {
                         }
                     }
 
-                    this.update(&mut cx, |this, cx| {
+                    this.update(cx, |this, cx| {
                         let version = this.version.clone();
                         let timestamp = this.next_timestamp();
                         if let Some(summary) = this.summary.as_mut() {
@@ -2837,6 +2839,7 @@ impl AssistantContext {
                     anyhow::Ok(())
                 }
                 .log_err()
+                .await
             });
         }
     }
@@ -2943,12 +2946,12 @@ impl AssistantContext {
             return;
         }
 
-        self.pending_save = cx.spawn(|this, mut cx| async move {
+        self.pending_save = cx.spawn(async move |this, cx| {
             if let Some(debounce) = debounce {
                 cx.background_executor().timer(debounce).await;
             }
 
-            let (old_path, summary) = this.read_with(&cx, |this, _| {
+            let (old_path, summary) = this.read_with(cx, |this, _| {
                 let path = this.path.clone();
                 let summary = if let Some(summary) = this.summary.as_ref() {
                     if summary.done {
@@ -2963,7 +2966,7 @@ impl AssistantContext {
             })?;
 
             if let Some(summary) = summary {
-                let context = this.read_with(&cx, |this, cx| this.serialize(cx))?;
+                let context = this.read_with(cx, |this, cx| this.serialize(cx))?;
                 let mut discriminant = 1;
                 let mut new_path;
                 loop {
@@ -2995,7 +2998,7 @@ impl AssistantContext {
                     }
                 }
 
-                this.update(&mut cx, |this, _| this.path = Some(new_path))?;
+                this.update(cx, |this, _| this.path = Some(new_path))?;
             }
 
             Ok(())

crates/assistant_context_editor/src/context_editor.rs

@@ -229,6 +229,7 @@ impl ContextEditor {
             editor.set_show_git_diff_gutter(false, cx);
             editor.set_show_code_actions(false, cx);
             editor.set_show_runnables(false, cx);
+            editor.set_show_breakpoints(false, cx);
             editor.set_show_wrap_guides(false, cx);
             editor.set_show_indent_guides(false, cx);
             editor.set_completion_provider(Some(Box::new(completion_provider)));
@@ -906,7 +907,7 @@ impl ContextEditor {
                         if editor_state.opened_patch != patch {
                             state.update_task = Some({
                                 let this = this.clone();
-                                cx.spawn_in(window, |_, cx| async move {
+                                cx.spawn_in(window, async move |_, cx| {
                                     Self::update_patch_editor(this.clone(), patch, cx)
                                         .await
                                         .log_err();
@@ -1069,10 +1070,9 @@ impl ContextEditor {
                         })
                         .ok();
                 } else {
-                    patch_state.update_task =
-                        Some(cx.spawn_in(window, move |this, cx| async move {
-                            Self::open_patch_editor(this, new_patch, cx).await.log_err();
-                        }));
+                    patch_state.update_task = Some(cx.spawn_in(window, async move |this, cx| {
+                        Self::open_patch_editor(this, new_patch, cx).await.log_err();
+                    }));
                 }
             }
         }
@@ -1102,10 +1102,10 @@ impl ContextEditor {
     async fn open_patch_editor(
         this: WeakEntity<Self>,
         patch: AssistantPatch,
-        mut cx: AsyncWindowContext,
+        cx: &mut AsyncWindowContext,
     ) -> Result<()> {
-        let project = this.read_with(&cx, |this, _| this.project.clone())?;
-        let resolved_patch = patch.resolve(project.clone(), &mut cx).await;
+        let project = this.read_with(cx, |this, _| this.project.clone())?;
+        let resolved_patch = patch.resolve(project.clone(), cx).await;
 
         let editor = cx.new_window_entity(|window, cx| {
             let editor = ProposedChangesEditor::new(
@@ -1129,7 +1129,7 @@ impl ContextEditor {
             editor
         })?;
 
-        this.update(&mut cx, |this, _| {
+        this.update(cx, |this, _| {
             if let Some(patch_state) = this.patches.get_mut(&patch.range) {
                 patch_state.editor = Some(PatchEditorState {
                     editor: editor.downgrade(),
@@ -1138,8 +1138,8 @@ impl ContextEditor {
                 patch_state.update_task.take();
             }
         })?;
-        this.read_with(&cx, |this, _| this.workspace.clone())?
-            .update_in(&mut cx, |workspace, window, cx| {
+        this.read_with(cx, |this, _| this.workspace.clone())?
+            .update_in(cx, |workspace, window, cx| {
                 workspace.add_item_to_active_pane(Box::new(editor.clone()), None, false, window, cx)
             })
             .log_err();
@@ -1150,11 +1150,11 @@ impl ContextEditor {
     async fn update_patch_editor(
         this: WeakEntity<Self>,
         patch: AssistantPatch,
-        mut cx: AsyncWindowContext,
+        cx: &mut AsyncWindowContext,
     ) -> Result<()> {
-        let project = this.update(&mut cx, |this, _| this.project.clone())?;
-        let resolved_patch = patch.resolve(project.clone(), &mut cx).await;
-        this.update_in(&mut cx, |this, window, cx| {
+        let project = this.update(cx, |this, _| this.project.clone())?;
+        let resolved_patch = patch.resolve(project.clone(), cx).await;
+        this.update_in(cx, |this, window, cx| {
             let patch_state = this.patches.get_mut(&patch.range)?;
 
             let locations = resolved_patch
@@ -1624,14 +1624,14 @@ impl ContextEditor {
                     .map(|path| Workspace::project_path_for_path(project.clone(), &path, false, cx))
                     .collect::<Vec<_>>();
 
-                cx.spawn(move |_, cx| async move {
+                cx.spawn(async move |_, cx| {
                     let mut paths = vec![];
                     let mut worktrees = vec![];
 
                     let opened_paths = futures::future::join_all(tasks).await;
                     for (worktree, project_path) in opened_paths.into_iter().flatten() {
                         let Ok(worktree_root_name) =
-                            worktree.read_with(&cx, |worktree, _| worktree.root_name().to_string())
+                            worktree.read_with(cx, |worktree, _| worktree.root_name().to_string())
                         else {
                             continue;
                         };
@@ -1648,12 +1648,12 @@ impl ContextEditor {
         };
 
         window
-            .spawn(cx, |mut cx| async move {
+            .spawn(cx, async move |cx| {
                 let (paths, dragged_file_worktrees) = paths.await;
                 let cmd_name = FileSlashCommand.name();
 
                 context_editor_view
-                    .update_in(&mut cx, |context_editor, window, cx| {
+                    .update_in(cx, |context_editor, window, cx| {
                         let file_argument = paths
                             .into_iter()
                             .map(|path| path.to_string_lossy().to_string())
@@ -2199,9 +2199,9 @@ impl ContextEditor {
                                     .log_err();
 
                                 if let Some(client) = client {
-                                    cx.spawn(|this, mut cx| async move {
-                                        client.authenticate_and_connect(true, &mut cx).await?;
-                                        this.update(&mut cx, |_, cx| cx.notify())
+                                    cx.spawn(async move |this, cx| {
+                                        client.authenticate_and_connect(true, cx).await?;
+                                        this.update(cx, |_, cx| cx.notify())
                                     })
                                     .detach_and_log_err(cx)
                                 }
@@ -3160,10 +3160,10 @@ impl FollowableItem for ContextEditor {
             assistant_panel_delegate.open_remote_context(workspace, context_id, window, cx)
         });
 
-        Some(window.spawn(cx, |mut cx| async move {
+        Some(window.spawn(cx, async move |cx| {
             let context_editor = context_editor_task.await?;
             context_editor
-                .update_in(&mut cx, |context_editor, window, cx| {
+                .update_in(cx, |context_editor, window, cx| {
                     context_editor.remote_id = Some(id);
                     context_editor.editor.update(cx, |editor, cx| {
                         editor.apply_update_proto(

crates/assistant_context_editor/src/context_history.rs

@@ -164,9 +164,9 @@ impl PickerDelegate for SavedContextPickerDelegate {
         cx: &mut Context<Picker<Self>>,
     ) -> Task<()> {
         let search = self.store.read(cx).search(query, cx);
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let matches = search.await;
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 let host_contexts = this.delegate.store.read(cx).host_contexts();
                 this.delegate.matches = host_contexts
                     .iter()

crates/assistant_context_editor/src/context_store.rs

@@ -100,7 +100,7 @@ impl ContextStore {
         let fs = project.read(cx).fs().clone();
         let languages = project.read(cx).languages().clone();
         let telemetry = project.read(cx).client().telemetry().clone();
-        cx.spawn(|mut cx| async move {
+        cx.spawn(async move |cx| {
             const CONTEXT_WATCH_DURATION: Duration = Duration::from_millis(100);
             let (mut events, _) = fs.watch(contexts_dir(), CONTEXT_WATCH_DURATION).await;
 
@@ -125,16 +125,15 @@ impl ContextStore {
                         languages,
                         slash_commands,
                         telemetry,
-                        _watch_updates: cx.spawn(|this, mut cx| {
+                        _watch_updates: cx.spawn(async move |this, cx| {
                             async move {
                                 while events.next().await.is_some() {
-                                    this.update(&mut cx, |this, cx| this.reload(cx))?
-                                        .await
-                                        .log_err();
+                                    this.update(cx, |this, cx| this.reload(cx))?.await.log_err();
                                 }
                                 anyhow::Ok(())
                             }
                             .log_err()
+                            .await
                         }),
                         client_subscription: None,
                         _project_subscriptions: vec![
@@ -395,7 +394,7 @@ impl ContextStore {
         let prompt_builder = self.prompt_builder.clone();
         let slash_commands = self.slash_commands.clone();
         let request = self.client.request(proto::CreateContext { project_id });
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let response = request.await?;
             let context_id = ContextId::from_proto(response.context_id);
             let context_proto = response.context.context("invalid context")?;
@@ -421,8 +420,8 @@ impl ContextStore {
                         .collect::<Result<Vec<_>>>()
                 })
                 .await?;
-            context.update(&mut cx, |context, cx| context.apply_ops(operations, cx))?;
-            this.update(&mut cx, |this, cx| {
+            context.update(cx, |context, cx| context.apply_ops(operations, cx))?;
+            this.update(cx, |this, cx| {
                 if let Some(existing_context) = this.loaded_context_for_id(&context_id, cx) {
                     existing_context
                 } else {
@@ -457,7 +456,7 @@ impl ContextStore {
         let prompt_builder = self.prompt_builder.clone();
         let slash_commands = self.slash_commands.clone();
 
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let saved_context = load.await?;
             let context = cx.new(|cx| {
                 AssistantContext::deserialize(
@@ -471,7 +470,7 @@ impl ContextStore {
                     cx,
                 )
             })?;
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 if let Some(existing_context) = this.loaded_context_for_path(&path, cx) {
                     existing_context
                 } else {
@@ -489,7 +488,7 @@ impl ContextStore {
     ) -> Task<Result<()>> {
         let fs = self.fs.clone();
 
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             fs.remove_file(
                 &path,
                 RemoveOptions {
@@ -499,7 +498,7 @@ impl ContextStore {
             )
             .await?;
 
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 this.contexts.retain(|context| {
                     context
                         .upgrade()
@@ -565,7 +564,7 @@ impl ContextStore {
         });
         let prompt_builder = self.prompt_builder.clone();
         let slash_commands = self.slash_commands.clone();
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             let response = request.await?;
             let context_proto = response.context.context("invalid context")?;
             let context = cx.new(|cx| {
@@ -590,8 +589,8 @@ impl ContextStore {
                         .collect::<Result<Vec<_>>>()
                 })
                 .await?;
-            context.update(&mut cx, |context, cx| context.apply_ops(operations, cx))?;
-            this.update(&mut cx, |this, cx| {
+            context.update(cx, |context, cx| context.apply_ops(operations, cx))?;
+            this.update(cx, |this, cx| {
                 if let Some(existing_context) = this.loaded_context_for_id(&context_id, cx) {
                     existing_context
                 } else {
@@ -700,12 +699,12 @@ impl ContextStore {
             project_id,
             contexts,
         });
-        cx.spawn(|this, cx| async move {
+        cx.spawn(async move |this, cx| {
             let response = request.await?;
 
             let mut context_ids = Vec::new();
             let mut operations = Vec::new();
-            this.read_with(&cx, |this, cx| {
+            this.read_with(cx, |this, cx| {
                 for context_version_proto in response.contexts {
                     let context_version = ContextVersion::from_proto(&context_version_proto);
                     let context_id = ContextId::from_proto(context_version_proto.context_id);
@@ -768,7 +767,7 @@ impl ContextStore {
 
     fn reload(&mut self, cx: &mut Context<Self>) -> Task<Result<()>> {
         let fs = self.fs.clone();
-        cx.spawn(|this, mut cx| async move {
+        cx.spawn(async move |this, cx| {
             fs.create_dir(contexts_dir()).await?;
 
             let mut paths = fs.read_dir(contexts_dir()).await?;
@@ -808,7 +807,7 @@ impl ContextStore {
             }
             contexts.sort_unstable_by_key(|context| Reverse(context.mtime));
 
-            this.update(&mut cx, |this, cx| {
+            this.update(cx, |this, cx| {
                 this.contexts_metadata = contexts;
                 cx.notify();
             })
@@ -819,7 +818,7 @@ impl ContextStore {
         cx.update_entity(
             &self.context_server_manager,
             |context_server_manager, cx| {
-                for server in context_server_manager.servers() {
+                for server in context_server_manager.running_servers() {
                     context_server_manager
                         .restart_server(&server.id(), cx)
                         .detach_and_log_err(cx);
@@ -850,7 +849,7 @@ impl ContextStore {
                     cx.spawn({
                         let server = server.clone();
                         let server_id = server_id.clone();
-                        |this, mut cx| async move {
+                        async move |this, cx| {
                             let Some(protocol) = server.client() else {
                                 return;
                             };
@@ -875,7 +874,7 @@ impl ContextStore {
                                         })
                                         .collect::<Vec<_>>();
 
-                                    this.update(&mut cx, |this, _cx| {
+                                    this.update( cx, |this, _cx| {
                                         this.context_server_slash_command_ids
                                             .insert(server_id.clone(), slash_command_ids);
                                     })

crates/assistant_context_editor/src/slash_command.rs

@@ -59,7 +59,7 @@ impl SlashCommandCompletionProvider {
         let command_name = command_name.to_string();
         let editor = self.editor.clone();
         let workspace = self.workspace.clone();
-        window.spawn(cx, |mut cx| async move {
+        window.spawn(cx, async move |cx| {
             let matches = match_strings(
                 &candidates,
                 &command_name,

crates/assistant_context_editor/src/slash_command_picker.rs

@@ -100,7 +100,7 @@ impl PickerDelegate for SlashCommandDelegate {
         cx: &mut Context<Picker<Self>>,
     ) -> Task<()> {
         let all_commands = self.all_commands.clone();
-        cx.spawn_in(window, |this, mut cx| async move {
+        cx.spawn_in(window, async move |this, cx| {
             let filtered_commands = cx
                 .background_spawn(async move {
                     if query.is_empty() {
@@ -119,7 +119,7 @@ impl PickerDelegate for SlashCommandDelegate {
                 })
                 .await;
 
-            this.update_in(&mut cx, |this, window, cx| {
+            this.update_in(cx, |this, window, cx| {
                 this.delegate.filtered_commands = filtered_commands;
                 this.delegate.set_selected_index(0, window, cx);
                 cx.notify();

crates/assistant_eval/Cargo.toml

@@ -0,0 +1,44 @@
+[package]
+name = "assistant_eval"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[[bin]]
+name = "assistant_eval"
+path = "src/main.rs"
+
+[dependencies]
+anyhow.workspace = true
+assistant2.workspace = true
+assistant_tool.workspace = true
+assistant_tools.workspace = true
+clap.workspace = true
+client.workspace = true
+collections.workspace = true
+context_server.workspace = true
+env_logger.workspace = true
+fs.workspace = true
+futures.workspace = true
+gpui.workspace = true
+gpui_tokio.workspace = true
+itertools.workspace = true
+language.workspace = true
+language_model.workspace = true
+language_models.workspace = true
+node_runtime.workspace = true
+project.workspace = true
+prompt_store.workspace = true
+regex.workspace = true
+release_channel.workspace = true
+reqwest_client.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+serde_json_lenient.workspace = true
+settings.workspace = true
+smol.workspace = true
+util.workspace = true

crates/assistant_eval/README.md

@@ -0,0 +1,77 @@
+# Tool Evals
+
+A framework for evaluating and benchmarking AI assistant performance in the Zed editor.
+
+## Overview
+
+Tool Evals provides a headless environment for running assistants evaluations on code repositories. It automates the process of:
+
+1. Cloning and setting up test repositories
+2. Sending prompts to language models
+3. Allowing the assistant to use tools to modify code
+4. Collecting metrics on performance
+5. Evaluating results against known good solutions
+
+## How It Works
+
+The system consists of several key components:
+
+- **Eval**: Loads test cases from the evaluation_data directory, clones repos, and executes evaluations
+- **HeadlessAssistant**: Provides a headless environment for running the AI assistant
+- **Judge**: Compares AI-generated diffs with reference solutions and scores their functional similarity
+
+The evaluation flow:
+1. An evaluation is loaded from the evaluation_data directory
+2. The target repository is cloned and checked out at a specific commit
+3. A HeadlessAssistant instance is created with the specified language model
+4. The user prompt is sent to the assistant
+5. The assistant responds and uses tools to modify code
+6. Upon completion, a diff is generated from the changes
+7. Results are saved including the diff, assistant's response, and performance metrics
+8. If a reference solution exists, a Judge evaluates the similarity of the solution
+
+## Setup Requirements
+
+### Prerequisites
+
+- Rust and Cargo
+- Git
+- Network access to clone repositories
+- Appropriate API keys for language models and git services (Anthropic, GitHub, etc.)
+
+### Environment Variables
+
+Ensure you have the required API keys set, either from a dev run of Zed or via these environment variables:
+- `ZED_ANTHROPIC_API_KEY` for Claude models
+- `ZED_OPENAI_API_KEY` for OpenAI models
+- `ZED_GITHUB_API_KEY` for GitHub API (or similar)
+
+## Usage
+
+### Running a Single Evaluation
+
+To run a specific evaluation:
+
+```bash
+cargo run -p assistant_eval -- bubbletea-add-set-window-title
+```
+
+The arguments are regex patterns for the evaluation names to run, so to run all evaluations that contain `bubbletea`, run:
+
+```bash
+cargo run -p assistant_eval -- bubbletea
+```
+
+To run all evaluations:
+
+```bash
+cargo run -p assistant_eval -- --all
+```
+
+## Evaluation Data Structure
+
+Each evaluation should be placed in the `evaluation_data` directory with the following structure:
+
+* `prompt.txt`: The user's prompt.
+* `original.diff`: The `git diff` of the change anticipated for this prompt.
+* `setup.json`: Information about the repo used for the evaluation.

crates/assistant_eval/build.rs

@@ -0,0 +1,52 @@
+// Copied from `crates/zed/build.rs`, with removal of code for including the zed icon on windows.
+
+use std::process::Command;
+
+fn main() {
+    if cfg!(target_os = "macos") {
+        println!("cargo:rustc-env=MACOSX_DEPLOYMENT_TARGET=10.15.7");
+
+        // Weakly link ReplayKit to ensure Zed can be used on macOS 10.15+.
+        println!("cargo:rustc-link-arg=-Wl,-weak_framework,ReplayKit");
+
+        // Seems to be required to enable Swift concurrency
+        println!("cargo:rustc-link-arg=-Wl,-rpath,/usr/lib/swift");
+
+        // Register exported Objective-C selectors, protocols, etc
+        println!("cargo:rustc-link-arg=-Wl,-ObjC");
+    }
+
+    // Populate git sha environment variable if git is available
+    println!("cargo:rerun-if-changed=../../.git/logs/HEAD");
+    println!(
+        "cargo:rustc-env=TARGET={}",
+        std::env::var("TARGET").unwrap()
+    );
+    if let Ok(output) = Command::new("git").args(["rev-parse", "HEAD"]).output() {
+        if output.status.success() {
+            let git_sha = String::from_utf8_lossy(&output.stdout);
+            let git_sha = git_sha.trim();
+
+            println!("cargo:rustc-env=ZED_COMMIT_SHA={git_sha}");
+
+            if let Ok(build_profile) = std::env::var("PROFILE") {
+                if build_profile == "release" {
+                    // This is currently the best way to make `cargo build ...`'s build script
+                    // to print something to stdout without extra verbosity.
+                    println!(
+                        "cargo:warning=Info: using '{git_sha}' hash for ZED_COMMIT_SHA env var"
+                    );
+                }
+            }
+        }
+    }
+
+    #[cfg(target_os = "windows")]
+    {
+        #[cfg(target_env = "msvc")]
+        {
+            // todo(windows): This is to avoid stack overflow. Remove it when solved.
+            println!("cargo:rustc-link-arg=/stack:{}", 8 * 1024 * 1024);
+        }
+    }
+}

crates/assistant_eval/src/eval.rs

@@ -0,0 +1,267 @@
+use crate::headless_assistant::{HeadlessAppState, HeadlessAssistant};
+use anyhow::anyhow;
+use assistant2::RequestKind;
+use collections::HashMap;
+use gpui::{App, Task};
+use language_model::{LanguageModel, TokenUsage};
+use serde::{Deserialize, Serialize};
+use std::{
+    fs,
+    io::Write,
+    path::{Path, PathBuf},
+    sync::Arc,
+    time::Duration,
+};
+use util::command::new_smol_command;
+
+pub struct Eval {
+    pub name: String,
+    pub path: PathBuf,
+    pub repo_path: PathBuf,
+    pub eval_setup: EvalSetup,
+    pub user_prompt: String,
+}
+
+#[derive(Debug, Serialize)]
+pub struct EvalOutput {
+    pub diff: String,
+    pub last_message: String,
+    pub elapsed_time: Duration,
+    pub assistant_response_count: usize,
+    pub tool_use_counts: HashMap<Arc<str>, u32>,
+    pub token_usage: TokenUsage,
+}
+
+#[derive(Deserialize)]
+pub struct EvalSetup {
+    pub url: String,
+    pub base_sha: String,
+}
+
+impl Eval {
+    /// Loads the eval from a path (typically in `evaluation_data`). Clones and checks out the repo
+    /// if necessary.
+    pub async fn load(name: String, path: PathBuf, repos_dir: &Path) -> anyhow::Result<Self> {
+        let prompt_path = path.join("prompt.txt");
+        let user_prompt = smol::unblock(|| std::fs::read_to_string(prompt_path)).await?;
+        let setup_path = path.join("setup.json");
+        let setup_contents = smol::unblock(|| std::fs::read_to_string(setup_path)).await?;
+        let eval_setup = serde_json_lenient::from_str_lenient::<EvalSetup>(&setup_contents)?;
+        let repo_path = repos_dir.join(repo_dir_name(&eval_setup.url));
+        Ok(Eval {
+            name,
+            path,
+            repo_path,
+            eval_setup,
+            user_prompt,
+        })
+    }
+
+    pub fn run(
+        self,
+        app_state: Arc<HeadlessAppState>,
+        model: Arc<dyn LanguageModel>,
+        cx: &mut App,
+    ) -> Task<anyhow::Result<EvalOutput>> {
+        cx.spawn(async move |cx| {
+            checkout_repo(&self.eval_setup, &self.repo_path).await?;
+
+            let (assistant, done_rx) =
+                cx.update(|cx| HeadlessAssistant::new(app_state.clone(), cx))??;
+
+            let _worktree = assistant
+                .update(cx, |assistant, cx| {
+                    assistant.project.update(cx, |project, cx| {
+                        project.create_worktree(&self.repo_path, true, cx)
+                    })
+                })?
+                .await?;
+
+            let start_time = std::time::SystemTime::now();
+
+            let (system_prompt_context, load_error) = cx
+                .update(|cx| {
+                    assistant
+                        .read(cx)
+                        .thread
+                        .read(cx)
+                        .load_system_prompt_context(cx)
+                })?
+                .await;
+
+            if let Some(load_error) = load_error {
+                return Err(anyhow!("{:?}", load_error));
+            };
+
+            assistant.update(cx, |assistant, cx| {
+                assistant.thread.update(cx, |thread, cx| {
+                    let context = vec![];
+                    thread.insert_user_message(self.user_prompt.clone(), context, None, cx);
+                    thread.set_system_prompt_context(system_prompt_context);
+                    thread.send_to_model(model, RequestKind::Chat, cx);
+                });
+            })?;
+
+            done_rx.recv().await??;
+
+            let elapsed_time = start_time.elapsed()?;
+
+            let diff = query_git(&self.repo_path, vec!["diff"]).await?;
+
+            assistant.update(cx, |assistant, cx| {
+                let thread = assistant.thread.read(cx);
+                let last_message = thread.messages().last().unwrap();
+                if last_message.role != language_model::Role::Assistant {
+                    return Err(anyhow!("Last message is not from assistant"));
+                }
+                let assistant_response_count = thread
+                    .messages()
+                    .filter(|message| message.role == language_model::Role::Assistant)
+                    .count();
+                Ok(EvalOutput {
+                    diff,
+                    last_message: last_message.text.clone(),
+                    elapsed_time,
+                    assistant_response_count,
+                    tool_use_counts: assistant.tool_use_counts.clone(),
+                    token_usage: thread.cumulative_token_usage(),
+                })
+            })?
+        })
+    }
+}
+
+impl EvalOutput {
+    // Method to save the output to a directory
+    pub fn save_to_directory(
+        &self,
+        output_dir: &Path,
+        eval_output_value: String,
+    ) -> anyhow::Result<()> {
+        // Create the output directory if it doesn't exist
+        fs::create_dir_all(&output_dir)?;
+
+        // Save the diff to a file
+        let diff_path = output_dir.join("diff.patch");
+        let mut diff_file = fs::File::create(&diff_path)?;
+        diff_file.write_all(self.diff.as_bytes())?;
+
+        // Save the last message to a file
+        let message_path = output_dir.join("assistant_response.txt");
+        let mut message_file = fs::File::create(&message_path)?;
+        message_file.write_all(self.last_message.as_bytes())?;
+
+        // Current metrics for this run
+        let current_metrics = serde_json::json!({
+            "elapsed_time_ms": self.elapsed_time.as_millis(),
+            "assistant_response_count": self.assistant_response_count,
+            "tool_use_counts": self.tool_use_counts,
+            "token_usage": self.token_usage,
+            "eval_output_value": eval_output_value,
+        });
+
+        // Get current timestamp in milliseconds
+        let timestamp = std::time::SystemTime::now()
+            .duration_since(std::time::UNIX_EPOCH)?
+            .as_millis()
+            .to_string();
+
+        // Path to metrics file
+        let metrics_path = output_dir.join("metrics.json");
+
+        // Load existing metrics if the file exists, or create a new object
+        let mut historical_metrics = if metrics_path.exists() {
+            let metrics_content = fs::read_to_string(&metrics_path)?;
+            serde_json::from_str::<serde_json::Value>(&metrics_content)
+                .unwrap_or_else(|_| serde_json::json!({}))
+        } else {
+            serde_json::json!({})
+        };
+
+        // Add new run with timestamp as key
+        if let serde_json::Value::Object(ref mut map) = historical_metrics {
+            map.insert(timestamp, current_metrics);
+        }
+
+        // Write updated metrics back to file
+        let metrics_json = serde_json::to_string_pretty(&historical_metrics)?;
+        let mut metrics_file = fs::File::create(&metrics_path)?;
+        metrics_file.write_all(metrics_json.as_bytes())?;
+
+        Ok(())
+    }
+}
+
+fn repo_dir_name(url: &str) -> String {
+    url.trim_start_matches("https://")
+        .replace(|c: char| !c.is_alphanumeric(), "_")
+}
+
+async fn checkout_repo(eval_setup: &EvalSetup, repo_path: &Path) -> anyhow::Result<()> {
+    if !repo_path.exists() {
+        smol::unblock({
+            let repo_path = repo_path.to_path_buf();
+            || std::fs::create_dir_all(repo_path)
+        })
+        .await?;
+        run_git(repo_path, vec!["init"]).await?;
+        run_git(repo_path, vec!["remote", "add", "origin", &eval_setup.url]).await?;
+    } else {
+        let actual_origin = query_git(repo_path, vec!["remote", "get-url", "origin"]).await?;
+        if actual_origin != eval_setup.url {
+            return Err(anyhow!(
+                "remote origin {} does not match expected origin {}",
+                actual_origin,
+                eval_setup.url
+            ));
+        }
+
+        // TODO: consider including "-x" to remove ignored files. The downside of this is that it will
+        // also remove build artifacts, and so prevent incremental reuse there.
+        run_git(repo_path, vec!["clean", "--force", "-d"]).await?;
+        run_git(repo_path, vec!["reset", "--hard", "HEAD"]).await?;
+    }
+
+    run_git(
+        repo_path,
+        vec!["fetch", "--depth", "1", "origin", &eval_setup.base_sha],
+    )
+    .await?;
+    run_git(repo_path, vec!["checkout", &eval_setup.base_sha]).await?;
+
+    Ok(())
+}
+
+async fn run_git(repo_path: &Path, args: Vec<&str>) -> anyhow::Result<()> {
+    let exit_status = new_smol_command("git")
+        .current_dir(repo_path)
+        .args(args.clone())
+        .status()
+        .await?;
+    if exit_status.success() {
+        Ok(())
+    } else {
+        Err(anyhow!(
+            "`git {}` failed with {}",
+            args.join(" "),
+            exit_status,
+        ))
+    }
+}
+
+async fn query_git(repo_path: &Path, args: Vec<&str>) -> anyhow::Result<String> {
+    let output = new_smol_command("git")
+        .current_dir(repo_path)
+        .args(args.clone())
+        .output()
+        .await?;
+    if output.status.success() {
+        Ok(String::from_utf8(output.stdout)?.trim().to_string())
+    } else {
+        Err(anyhow!(
+            "`git {}` failed with {}",
+            args.join(" "),
+            output.status
+        ))
+    }
+}

crates/assistant_eval/src/headless_assistant.rs

@@ -0,0 +1,236 @@
+use anyhow::anyhow;
+use assistant2::{RequestKind, Thread, ThreadEvent, ThreadStore};
+use assistant_tool::ToolWorkingSet;
+use client::{Client, UserStore};
+use collections::HashMap;
+use futures::StreamExt;
+use gpui::{prelude::*, App, AsyncApp, Entity, SemanticVersion, Subscription, Task};
+use language::LanguageRegistry;
+use language_model::{
+    AuthenticateError, LanguageModel, LanguageModelProviderId, LanguageModelRegistry,
+    LanguageModelRequest,
+};
+use node_runtime::NodeRuntime;
+use project::{Project, RealFs};
+use prompt_store::PromptBuilder;
+use settings::SettingsStore;
+use smol::channel;
+use std::sync::Arc;
+
+/// Subset of `workspace::AppState` needed by `HeadlessAssistant`, with additional fields.
+pub struct HeadlessAppState {
+    pub languages: Arc<LanguageRegistry>,
+    pub client: Arc<Client>,
+    pub user_store: Entity<UserStore>,
+    pub fs: Arc<dyn fs::Fs>,
+    pub node_runtime: NodeRuntime,
+
+    // Additional fields not present in `workspace::AppState`.
+    pub prompt_builder: Arc<PromptBuilder>,
+}
+
+pub struct HeadlessAssistant {
+    pub thread: Entity<Thread>,
+    pub project: Entity<Project>,
+    #[allow(dead_code)]
+    pub thread_store: Entity<ThreadStore>,
+    pub tool_use_counts: HashMap<Arc<str>, u32>,
+    pub done_tx: channel::Sender<anyhow::Result<()>>,
+    _subscription: Subscription,
+}
+
+impl HeadlessAssistant {
+    pub fn new(
+        app_state: Arc<HeadlessAppState>,
+        cx: &mut App,
+    ) -> anyhow::Result<(Entity<Self>, channel::Receiver<anyhow::Result<()>>)> {
+        let env = None;
+        let project = Project::local(
+            app_state.client.clone(),
+            app_state.node_runtime.clone(),
+            app_state.user_store.clone(),
+            app_state.languages.clone(),
+            app_state.fs.clone(),
+            env,
+            cx,
+        );
+
+        let tools = Arc::new(ToolWorkingSet::default());
+        let thread_store =
+            ThreadStore::new(project.clone(), tools, app_state.prompt_builder.clone(), cx)?;
+
+        let thread = thread_store.update(cx, |thread_store, cx| thread_store.create_thread(cx));
+
+        let (done_tx, done_rx) = channel::unbounded::<anyhow::Result<()>>();
+
+        let headless_thread = cx.new(move |cx| Self {
+            _subscription: cx.subscribe(&thread, Self::handle_thread_event),
+            thread,
+            project,
+            thread_store,
+            tool_use_counts: HashMap::default(),
+            done_tx,
+        });
+
+        Ok((headless_thread, done_rx))
+    }
+
+    fn handle_thread_event(
+        &mut self,
+        thread: Entity<Thread>,
+        event: &ThreadEvent,
+        cx: &mut Context<Self>,
+    ) {
+        match event {
+            ThreadEvent::ShowError(err) => self
+                .done_tx
+                .send_blocking(Err(anyhow!("{:?}", err)))
+                .unwrap(),
+            ThreadEvent::DoneStreaming => {
+                let thread = thread.read(cx);
+                if let Some(message) = thread.messages().last() {
+                    println!("Message: {}", message.text,);
+                }
+                if thread.all_tools_finished() {
+                    self.done_tx.send_blocking(Ok(())).unwrap()
+                }
+            }
+            ThreadEvent::UsePendingTools => {
+                thread.update(cx, |thread, cx| {
+                    thread.use_pending_tools(cx);
+                });
+            }
+            ThreadEvent::ToolFinished {
+                tool_use_id,
+                pending_tool_use,
+                ..
+            } => {
+                if let Some(pending_tool_use) = pending_tool_use {
+                    println!(
+                        "Used tool {} with input: {}",
+                        pending_tool_use.name, pending_tool_use.input
+                    );
+                    *self
+                        .tool_use_counts
+                        .entry(pending_tool_use.name.clone())
+                        .or_insert(0) += 1;
+                }
+                if let Some(tool_result) = thread.read(cx).tool_result(tool_use_id) {
+                    println!("Tool result: {:?}", tool_result);
+                }
+                if thread.read(cx).all_tools_finished() {
+                    let model_registry = LanguageModelRegistry::read_global(cx);
+                    if let Some(model) = model_registry.active_model() {
+                        thread.update(cx, |thread, cx| {
+                            thread.attach_tool_results(vec![], cx);
+                            thread.send_to_model(model, RequestKind::Chat, cx);
+                        });
+                    }
+                }
+            }
+            _ => {}
+        }
+    }
+}
+
+pub fn init(cx: &mut App) -> Arc<HeadlessAppState> {
+    release_channel::init(SemanticVersion::default(), cx);
+    gpui_tokio::init(cx);
+
+    let mut settings_store = SettingsStore::new(cx);
+    settings_store
+        .set_default_settings(settings::default_settings().as_ref(), cx)
+        .unwrap();
+    cx.set_global(settings_store);
+    client::init_settings(cx);
+    Project::init_settings(cx);
+
+    let client = Client::production(cx);
+    cx.set_http_client(client.http_client().clone());
+
+    let git_binary_path = None;
+    let fs = Arc::new(RealFs::new(git_binary_path));
+
+    let languages = Arc::new(LanguageRegistry::new(cx.background_executor().clone()));
+
+    let user_store = cx.new(|cx| UserStore::new(client.clone(), cx));
+
+    language::init(cx);
+    language_model::init(client.clone(), cx);
+    language_models::init(user_store.clone(), client.clone(), fs.clone(), cx);
+    assistant_tools::init(client.http_client().clone(), cx);
+    context_server::init(cx);
+    let stdout_is_a_pty = false;
+    let prompt_builder = PromptBuilder::load(fs.clone(), stdout_is_a_pty, cx);
+    assistant2::init(fs.clone(), client.clone(), prompt_builder.clone(), cx);
+
+    Arc::new(HeadlessAppState {
+        languages,
+        client,
+        user_store,
+        fs,
+        node_runtime: NodeRuntime::unavailable(),
+        prompt_builder,
+    })
+}
+
+pub fn find_model(model_name: &str, cx: &App) -> anyhow::Result<Arc<dyn LanguageModel>> {
+    let model_registry = LanguageModelRegistry::read_global(cx);
+    let model = model_registry
+        .available_models(cx)
+        .find(|model| model.id().0 == model_name);
+
+    let Some(model) = model else {
+        return Err(anyhow!(
+            "No language model named {} was available. Available models: {}",
+            model_name,
+            model_registry
+                .available_models(cx)
+                .map(|model| model.id().0.clone())
+                .collect::<Vec<_>>()
+                .join(", ")
+        ));
+    };
+
+    Ok(model)
+}
+
+pub fn authenticate_model_provider(
+    provider_id: LanguageModelProviderId,
+    cx: &mut App,
+) -> Task<std::result::Result<(), AuthenticateError>> {
+    let model_registry = LanguageModelRegistry::read_global(cx);
+    let model_provider = model_registry.provider(&provider_id).unwrap();
+    model_provider.authenticate(cx)
+}
+
+pub async fn send_language_model_request(
+    model: Arc<dyn LanguageModel>,
+    request: LanguageModelRequest,
+    cx: &mut AsyncApp,
+) -> anyhow::Result<String> {
+    match model.stream_completion_text(request, &cx).await {
+        Ok(mut stream) => {
+            let mut full_response = String::new();
+
+            // Process the response stream
+            while let Some(chunk_result) = stream.stream.next().await {
+                match chunk_result {
+                    Ok(chunk_str) => {
+                        full_response.push_str(&chunk_str);
+                    }
+                    Err(err) => {
+                        return Err(anyhow!(
+                            "Error receiving response from language model: {err}"
+                        ));
+                    }
+                }
+            }
+
+            Ok(full_response)
+        }
+        Err(err) => Err(anyhow!(
+            "Failed to get response from language model. Error was: {err}"
+        )),
+    }
+}

crates/assistant_eval/src/judge.rs

@@ -0,0 +1,121 @@
+use crate::eval::EvalOutput;
+use crate::headless_assistant::send_language_model_request;
+use anyhow::anyhow;
+use gpui::{App, Task};
+use language_model::{
+    LanguageModel, LanguageModelRequest, LanguageModelRequestMessage, MessageContent, Role,
+};
+use std::{path::Path, sync::Arc};
+
+pub struct Judge {
+    pub original_diff: Option<String>,
+    #[allow(dead_code)]
+    pub original_message: Option<String>,
+    pub model: Arc<dyn LanguageModel>,
+}
+
+impl Judge {
+    pub async fn load(eval_path: &Path, model: Arc<dyn LanguageModel>) -> anyhow::Result<Judge> {
+        let original_diff_path = eval_path.join("original.diff");
+        let original_diff = smol::unblock(move || {
+            if std::fs::exists(&original_diff_path)? {
+                anyhow::Ok(Some(std::fs::read_to_string(&original_diff_path)?))
+            } else {
+                anyhow::Ok(None)
+            }
+        });
+
+        let original_message_path = eval_path.join("original_message.txt");
+        let original_message = smol::unblock(move || {
+            if std::fs::exists(&original_message_path)? {
+                anyhow::Ok(Some(std::fs::read_to_string(&original_message_path)?))
+            } else {
+                anyhow::Ok(None)
+            }
+        });
+
+        Ok(Self {
+            original_diff: original_diff.await?,
+            original_message: original_message.await?,
+            model,
+        })
+    }
+
+    pub fn run(&self, eval_output: &EvalOutput, cx: &mut App) -> Task<anyhow::Result<String>> {
+        let Some(original_diff) = self.original_diff.as_ref() else {
+            return Task::ready(Err(anyhow!("No original.diff found")));
+        };
+
+        // TODO: check for empty diff?
+        let prompt = diff_comparison_prompt(&original_diff, &eval_output.diff);
+
+        let request = LanguageModelRequest {
+            messages: vec![LanguageModelRequestMessage {
+                role: Role::User,
+                content: vec![MessageContent::Text(prompt)],
+                cache: false,
+            }],
+            temperature: Some(0.0),
+            tools: Vec::new(),
+            stop: Vec::new(),
+        };
+
+        let model = self.model.clone();
+        cx.spawn(async move |cx| send_language_model_request(model, request, cx).await)
+    }
+}
+
+pub fn diff_comparison_prompt(original_diff: &str, new_diff: &str) -> String {
+    format!(
+        r#"# Git Diff Similarity Evaluation Template
+
+## Instructions
+
+Compare the two diffs and score them between 0.0 and 1.0 based on their functional similarity.
+- 1.0 = Perfect functional match (achieves identical results)
+- 0.0 = No functional similarity whatsoever
+
+## Evaluation Criteria
+
+Please consider the following aspects in order of importance:
+
+1. **Functional Equivalence (60%)**
+   - Do both diffs achieve the same end result?
+   - Are the changes functionally equivalent despite possibly using different approaches?
+   - Do the modifications address the same issues or implement the same features?
+
+2. **Logical Structure (20%)**
+   - Are the logical flows similar?
+   - Do the modifications affect the same code paths?
+   - Are control structures (if/else, loops, etc.) modified in similar ways?
+
+3. **Code Content (15%)**
+   - Are similar lines added/removed?
+   - Are the same variables, functions, or methods being modified?
+   - Are the same APIs or libraries being used?
+
+4. **File Layout (5%)**
+   - Are the same files being modified?
+   - Are changes occurring in similar locations within files?
+
+## Input
+
+Original Diff:
+```git
+{}
+```
+
+New Diff:
+```git
+{}
+```
+
+## Output Format
+
+THE ONLY OUTPUT SHOULD BE A SCORE BETWEEN 0.0 AND 1.0.
+
+Example output:
+0.85"#,
+        original_diff, new_diff
+    )
+}

crates/assistant_eval/src/main.rs

@@ -0,0 +1,243 @@
+mod eval;
+mod headless_assistant;
+mod judge;
+
+use clap::Parser;
+use eval::{Eval, EvalOutput};
+use futures::future;
+use gpui::{Application, AsyncApp};
+use headless_assistant::{authenticate_model_provider, find_model, HeadlessAppState};
+use itertools::Itertools;
+use judge::Judge;
+use language_model::{LanguageModel, LanguageModelRegistry};
+use regex::Regex;
+use reqwest_client::ReqwestClient;
+use std::{cmp, path::PathBuf, sync::Arc};
+
+#[derive(Parser, Debug)]
+#[command(
+    name = "assistant_eval",
+    disable_version_flag = true,
+    before_help = "Tool eval runner"
+)]
+struct Args {
+    /// Regexes to match the names of evals to run.
+    eval_name_regexes: Vec<String>,
+    /// Runs all evals in `evaluation_data`, causes the regex to be ignored.
+    #[arg(long)]
+    all: bool,
+    /// Name of the model (default: "claude-3-7-sonnet-latest")
+    #[arg(long, default_value = "claude-3-7-sonnet-latest")]
+    model_name: String,
+    /// Name of the editor model (default: value of `--model_name`).
+    #[arg(long)]
+    editor_model_name: Option<String>,
+    /// Name of the judge model (default: value of `--model_name`).
+    #[arg(long)]
+    judge_model_name: Option<String>,
+    /// Number of evaluations to run concurrently (default: 10)
+    #[arg(short, long, default_value = "10")]
+    concurrency: usize,
+}
+
+fn main() {
+    env_logger::init();
+    let args = Args::parse();
+    let http_client = Arc::new(ReqwestClient::new());
+    let app = Application::headless().with_http_client(http_client.clone());
+
+    let crate_dir = PathBuf::from("../zed-agent-bench");
+    let evaluation_data_dir = crate_dir.join("evaluation_data").canonicalize().unwrap();
+
+    let repos_dir = crate_dir.join("repos");
+    if !repos_dir.exists() {
+        std::fs::create_dir_all(&repos_dir).unwrap();
+    }
+    let repos_dir = repos_dir.canonicalize().unwrap();
+
+    let all_evals = std::fs::read_dir(&evaluation_data_dir)
+        .unwrap()
+        .map(|path| path.unwrap().file_name().to_string_lossy().to_string())
+        .collect::<Vec<_>>();
+
+    let evals_to_run = if args.all {
+        all_evals
+    } else {
+        args.eval_name_regexes
+            .into_iter()
+            .map(|regex_string| Regex::new(&regex_string).unwrap())
+            .flat_map(|regex| {
+                all_evals
+                    .iter()
+                    .filter(|eval_name| regex.is_match(eval_name))
+                    .cloned()
+                    .collect::<Vec<_>>()
+            })
+            .collect::<Vec<_>>()
+    };
+
+    if evals_to_run.is_empty() {
+        panic!("Names of evals to run must be provided or `--all` specified");
+    }
+
+    println!("Will run the following evals: {evals_to_run:?}");
+    println!("Running up to {} evals concurrently", args.concurrency);
+
+    let editor_model_name = if let Some(model_name) = args.editor_model_name {
+        model_name
+    } else {
+        args.model_name.clone()
+    };
+
+    let judge_model_name = if let Some(model_name) = args.judge_model_name {
+        model_name
+    } else {
+        args.model_name.clone()
+    };
+
+    app.run(move |cx| {
+        let app_state = headless_assistant::init(cx);
+
+        let model = find_model(&args.model_name, cx).unwrap();
+        let editor_model = find_model(&editor_model_name, cx).unwrap();
+        let judge_model = find_model(&judge_model_name, cx).unwrap();
+
+        LanguageModelRegistry::global(cx).update(cx, |registry, cx| {
+            registry.set_active_model(Some(model.clone()), cx);
+            registry.set_editor_model(Some(editor_model.clone()), cx);
+        });
+
+        let model_provider_id = model.provider_id();
+        let editor_model_provider_id = editor_model.provider_id();
+        let judge_model_provider_id = judge_model.provider_id();
+
+        cx.spawn(async move |cx| {
+            // Authenticate all model providers first
+            cx.update(|cx| authenticate_model_provider(model_provider_id.clone(), cx))
+                .unwrap()
+                .await
+                .unwrap();
+            cx.update(|cx| authenticate_model_provider(editor_model_provider_id.clone(), cx))
+                .unwrap()
+                .await
+                .unwrap();
+            cx.update(|cx| authenticate_model_provider(judge_model_provider_id.clone(), cx))
+                .unwrap()
+                .await
+                .unwrap();
+
+            let eval_load_futures = evals_to_run
+                .into_iter()
+                .map(|eval_name| {
+                    let eval_path = evaluation_data_dir.join(&eval_name);
+                    let load_future = Eval::load(eval_name.clone(), eval_path, &repos_dir);
+                    async move {
+                        match load_future.await {
+                            Ok(eval) => Some(eval),
+                            Err(err) => {
+                                // TODO: Persist errors / surface errors at the end.
+                                println!("Error loading {eval_name}: {err}");
+                                None
+                            }
+                        }
+                    }
+                })
+                .collect::<Vec<_>>();
+
+            let loaded_evals = future::join_all(eval_load_futures)
+                .await
+                .into_iter()
+                .flatten()
+                .collect::<Vec<_>>();
+
+            // The evals need to be loaded and grouped by URL before concurrently running, since
+            // evals that use the same remote URL will use the same working directory.
+            let mut evals_grouped_by_url: Vec<Vec<Eval>> = loaded_evals
+                .into_iter()
+                .map(|eval| (eval.eval_setup.url.clone(), eval))
+                .into_group_map()
+                .into_values()
+                .collect::<Vec<_>>();
+
+            // Sort groups in descending order, so that bigger groups start first.
+            evals_grouped_by_url.sort_by_key(|evals| cmp::Reverse(evals.len()));
+
+            let result_futures = evals_grouped_by_url
+                .into_iter()
+                .map(|evals| {
+                    let model = model.clone();
+                    let judge_model = judge_model.clone();
+                    let app_state = app_state.clone();
+                    let cx = cx.clone();
+
+                    async move {
+                        let mut results = Vec::new();
+                        for eval in evals {
+                            let name = eval.name.clone();
+                            println!("Starting eval named {}", name);
+                            let result = run_eval(
+                                eval,
+                                model.clone(),
+                                judge_model.clone(),
+                                app_state.clone(),
+                                cx.clone(),
+                            )
+                            .await;
+                            results.push((name, result));
+                        }
+                        results
+                    }
+                })
+                .collect::<Vec<_>>();
+
+            let results = future::join_all(result_futures)
+                .await
+                .into_iter()
+                .flatten()
+                .collect::<Vec<_>>();
+
+            // Process results in order of completion
+            for (eval_name, result) in results {
+                match result {
+                    Ok((eval_output, judge_output)) => {
+                        println!("Generated diff for {eval_name}:\n");
+                        println!("{}\n", eval_output.diff);
+                        println!("Last message for {eval_name}:\n");
+                        println!("{}\n", eval_output.last_message);
+                        println!("Elapsed time: {:?}", eval_output.elapsed_time);
+                        println!(
+                            "Assistant response count: {}",
+                            eval_output.assistant_response_count
+                        );
+                        println!("Tool use counts: {:?}", eval_output.tool_use_counts);
+                        println!("Judge output for {eval_name}: {judge_output}");
+                    }
+                    Err(err) => {
+                        // TODO: Persist errors / surface errors at the end.
+                        println!("Error running {eval_name}: {err}");
+                    }
+                }
+            }
+
+            cx.update(|cx| cx.quit()).unwrap();
+        })
+        .detach();
+    });
+
+    println!("Done running evals");
+}
+
+async fn run_eval(
+    eval: Eval,
+    model: Arc<dyn LanguageModel>,
+    judge_model: Arc<dyn LanguageModel>,
+    app_state: Arc<HeadlessAppState>,
+    cx: AsyncApp,
+) -> anyhow::Result<(EvalOutput, String)> {
+    let path = eval.path.clone();
+    let judge = Judge::load(&path, judge_model).await?;
+    let eval_output = cx.update(|cx| eval.run(app_state, model, cx))?.await?;
+    let judge_output = cx.update(|cx| judge.run(&eval_output, cx))?.await?;
+    eval_output.save_to_directory(&path, judge_output.to_string())?;
+    Ok((eval_output, judge_output))
+}

crates/assistant_settings/Cargo.toml

@@ -14,6 +14,7 @@ path = "src/assistant_settings.rs"
 [dependencies]
 anthropic = { workspace = true, features = ["schemars"] }
 anyhow.workspace = true
+collections.workspace = true
 feature_flags.workspace = true
 gpui.workspace = true
 language_model.workspace = true

crates/assistant_settings/src/agent_profile.rs

@@ -0,0 +1,59 @@
+use std::sync::Arc;
+
+use collections::HashMap;
+use gpui::SharedString;
+
+/// A profile for the Zed Agent that controls its behavior.
+#[derive(Debug, Clone)]
+pub struct AgentProfile {
+    /// The name of the profile.
+    pub name: SharedString,
+    pub tools: HashMap<Arc<str>, bool>,
+    #[allow(dead_code)]
+    pub context_servers: HashMap<Arc<str>, ContextServerPreset>,
+}
+
+#[derive(Debug, Clone)]
+pub struct ContextServerPreset {
+    #[allow(dead_code)]
+    pub tools: HashMap<Arc<str>, bool>,
+}
+
+impl AgentProfile {
+    pub fn read_only() -> Self {
+        Self {
+            name: "Read-only".into(),
+            tools: HashMap::from_iter([
+                ("diagnostics".into(), true),
+                ("fetch".into(), true),
+                ("list-directory".into(), true),
+                ("now".into(), true),
+                ("path-search".into(), true),
+                ("read-file".into(), true),
+                ("regex-search".into(), true),
+                ("thinking".into(), true),
+            ]),
+            context_servers: HashMap::default(),
+        }
+    }
+
+    pub fn code_writer() -> Self {
+        Self {
+            name: "Code Writer".into(),
+            tools: HashMap::from_iter([
+                ("bash".into(), true),
+                ("delete-path".into(), true),
+                ("diagnostics".into(), true),
+                ("edit-files".into(), true),
+                ("fetch".into(), true),
+                ("list-directory".into(), true),
+                ("now".into(), true),
+                ("path-search".into(), true),
+                ("read-file".into(), true),
+                ("regex-search".into(), true),
+                ("thinking".into(), true),
+            ]),
+            context_servers: HashMap::default(),
+        }
+    }
+}

crates/assistant_settings/src/assistant_settings.rs

@@ -1,7 +1,10 @@
+mod agent_profile;
+
 use std::sync::Arc;
 
 use ::open_ai::Model as OpenAiModel;
 use anthropic::Model as AnthropicModel;
+use collections::HashMap;
 use deepseek::Model as DeepseekModel;
 use feature_flags::FeatureFlagAppExt;
 use gpui::{App, Pixels};
@@ -12,6 +15,8 @@ use schemars::{schema::Schema, JsonSchema};
 use serde::{Deserialize, Serialize};
 use settings::{Settings, SettingsSources};
 
+pub use crate::agent_profile::*;
+
 #[derive(Copy, Clone, Default, Debug, Serialize, Deserialize, JsonSchema)]
 #[serde(rename_all = "snake_case")]
 pub enum AssistantDockPosition {
@@ -66,6 +71,7 @@ pub struct AssistantSettings {
     pub inline_alternatives: Vec<LanguageModelSelection>,
     pub using_outdated_settings_version: bool,
     pub enable_experimental_live_diffs: bool,
+    pub profiles: HashMap<Arc<str>, AgentProfile>,
 }
 
 impl AssistantSettings {
@@ -166,6 +172,7 @@ impl AssistantSettingsContent {
                     editor_model: None,
                     inline_alternatives: None,
                     enable_experimental_live_diffs: None,
+                    profiles: None,
                 },
                 VersionedAssistantSettingsContent::V2(settings) => settings.clone(),
             },
@@ -187,6 +194,7 @@ impl AssistantSettingsContent {
                 editor_model: None,
                 inline_alternatives: None,
                 enable_experimental_live_diffs: None,
+                profiles: None,
             },
         }
     }
@@ -316,6 +324,7 @@ impl Default for VersionedAssistantSettingsContent {
             editor_model: None,
             inline_alternatives: None,
             enable_experimental_live_diffs: None,
+            profiles: None,
         })
     }
 }
@@ -352,6 +361,8 @@ pub struct AssistantSettingsContentV2 {
     ///
     /// Default: false
     enable_experimental_live_diffs: Option<bool>,
+    #[schemars(skip)]
+    profiles: Option<HashMap<Arc<str>, AgentProfileContent>>,
 }
 
 #[derive(Clone, Debug, Serialize, Deserialize, JsonSchema, PartialEq)]
@@ -388,6 +399,12 @@ impl Default for LanguageModelSelection {
     }
 }
 
+#[derive(Debug, PartialEq, Clone, Serialize, Deserialize, JsonSchema)]
+pub struct AgentProfileContent {
+    pub name: Arc<str>,
+    pub tools: HashMap<Arc<str>, bool>,
+}
+
 #[derive(Clone, Serialize, Deserialize, JsonSchema, Debug)]
 pub struct AssistantSettingsContentV1 {
     /// Whether the Assistant is enabled.
@@ -482,6 +499,24 @@ impl Settings for AssistantSettings {
                 &mut settings.enable_experimental_live_diffs,
                 value.enable_experimental_live_diffs,
             );
+            merge(
+                &mut settings.profiles,
+                value.profiles.map(|profiles| {
+                    profiles
+                        .into_iter()
+                        .map(|(id, profile)| {
+                            (
+                                id,
+                                AgentProfile {
+                                    name: profile.name.into(),
+                                    tools: profile.tools,
+                                    context_servers: HashMap::default(),
+                                },
+                            )
+                        })
+                        .collect()
+                }),
+            );
         }
 
         Ok(settings)
@@ -546,6 +581,7 @@ mod tests {
                             default_width: None,
                             default_height: None,
                             enable_experimental_live_diffs: None,
+                            profiles: None,
                         }),
                     )
                 },

crates/assistant_slash_commands/src/auto_command.rs

@@ -77,8 +77,8 @@ impl SlashCommand for AutoCommand {
 
         let cx: &mut App = cx;
 
-        cx.spawn(|cx: gpui::AsyncApp| async move {
-            let task = project_index.read_with(&cx, |project_index, cx| {
+        cx.spawn(async move |cx| {
+            let task = project_index.read_with(cx, |project_index, cx| {
                 project_index.flush_summary_backlogs(cx)
             })?;
 
@@ -117,9 +117,9 @@ impl SlashCommand for AutoCommand {
             return Task::ready(Err(anyhow!("no project indexer")));
         };
 
-        let task = window.spawn(cx, |cx| async move {
+        let task = window.spawn(cx, async move |cx| {
             let summaries = project_index
-                .read_with(&cx, |project_index, cx| project_index.all_summaries(cx))?
+                .read_with(cx, |project_index, cx| project_index.all_summaries(cx))?
                 .await?;
 
             commands_for_summaries(&summaries, &original_prompt, &cx).await

crates/assistant_slash_commands/src/diagnostics_command.rs

@@ -186,7 +186,7 @@ impl SlashCommand for DiagnosticsSlashCommand {
 
         let task = collect_diagnostics(workspace.read(cx).project().clone(), options, cx);
 
-        window.spawn(cx, move |_| async move {
+        window.spawn(cx, async move |_| {
             task.await?
                 .map(|output| output.to_event_stream())
                 .ok_or_else(|| anyhow!("No diagnostics found"))
@@ -268,7 +268,7 @@ fn collect_diagnostics(
         })
         .collect();
 
-    cx.spawn(|mut cx| async move {
+    cx.spawn(async move |cx| {
         let mut output = SlashCommandOutput::default();
 
         if let Some(error_source) = error_source.as_ref() {
@@ -299,7 +299,7 @@ fn collect_diagnostics(
             }
 
             if let Some(buffer) = project_handle
-                .update(&mut cx, |project, cx| project.open_buffer(project_path, cx))?
+                .update(cx, |project, cx| project.open_buffer(project_path, cx))?
                 .await
                 .log_err()
             {

crates/assistant_slash_commands/src/file_command.rs

@@ -241,7 +241,7 @@ fn collect_files(
         .collect::<Vec<_>>();
 
     let (events_tx, events_rx) = mpsc::unbounded();
-    cx.spawn(|mut cx| async move {
+    cx.spawn(async move |cx| {
         for snapshot in snapshots {
             let worktree_id = snapshot.id();
             let mut directory_stack: Vec<Arc<Path>> = Vec::new();
@@ -352,7 +352,7 @@ fn collect_files(
                     )))?;
                 } else if entry.is_file() {
                     let Some(open_buffer_task) = project_handle
-                        .update(&mut cx, |project, cx| {
+                        .update(cx, |project, cx| {
                             project.open_buffer((worktree_id, &entry.path), cx)
                         })
                         .ok()
@@ -361,7 +361,7 @@ fn collect_files(
                     };
                     if let Some(buffer) = open_buffer_task.await.log_err() {
                         let mut output = SlashCommandOutput::default();
-                        let snapshot = buffer.read_with(&cx, |buffer, _| buffer.snapshot())?;
+                        let snapshot = buffer.read_with(cx, |buffer, _| buffer.snapshot())?;
                         append_buffer_to_output(
                             &snapshot,
                             Some(&path_including_worktree_name),

crates/assistant_slash_commands/src/project_command.rs

@@ -99,7 +99,7 @@ impl SlashCommand for ProjectSlashCommand {
             return Task::ready(Err(anyhow::anyhow!("no project indexer")));
         };
 
-        window.spawn(cx, |mut cx| async move {
+        window.spawn(cx, async move |cx| {
             let current_model = current_model.ok_or_else(|| anyhow!("no model selected"))?;
 
             let prompt =
@@ -123,7 +123,7 @@ impl SlashCommand for ProjectSlashCommand {
                 .search_queries;
 
             let results = project_index
-                .read_with(&cx, |project_index, cx| {
+                .read_with(cx, |project_index, cx| {
                     project_index.search(search_queries.clone(), 25, cx)
                 })?
                 .await?;

crates/assistant_slash_commands/src/search_command.rs

@@ -109,9 +109,9 @@ impl SlashCommand for SearchSlashCommand {
             return Task::ready(Err(anyhow::anyhow!("no project indexer")));
         };
 
-        window.spawn(cx, |cx| async move {
+        window.spawn(cx, async move |cx| {
             let results = project_index
-                .read_with(&cx, |project_index, cx| {
+                .read_with(cx, |project_index, cx| {
                     project_index.search(vec![query.clone()], limit.unwrap_or(5), cx)
                 })?
                 .await?;

crates/assistant_slash_commands/src/tab_command.rs

@@ -86,7 +86,7 @@ impl SlashCommand for TabSlashCommand {
             tab_items_for_queries(workspace, &[current_query], cancel, false, window, cx);
 
         let comment_id = cx.theme().syntax().highlight_id("comment").map(HighlightId);
-        window.spawn(cx, |_| async move {
+        window.spawn(cx, async move |_| {
             let tab_items = tab_items_search.await?;
             let run_command = tab_items.len() == 1;
             let tab_completion_items = tab_items.into_iter().filter_map(|(path, ..)| {
@@ -172,11 +172,11 @@ fn tab_items_for_queries(
 ) -> Task<anyhow::Result<Vec<(Option<PathBuf>, BufferSnapshot, usize)>>> {
     let empty_query = queries.is_empty() || queries.iter().all(|query| query.trim().is_empty());
     let queries = queries.to_owned();
-    window.spawn(cx, |mut cx| async move {
+    window.spawn(cx, async move |cx| {
         let mut open_buffers =
             workspace
                 .context("no workspace")?
-                .update(&mut cx, |workspace, cx| {
+                .update(cx, |workspace, cx| {
                     if strict_match && empty_query {
                         let snapshot = active_item_buffer(workspace, cx)?;
                         let full_path = snapshot.resolve_file_path(cx, true);

crates/assistant_tool/Cargo.toml

@@ -14,9 +14,11 @@ path = "src/assistant_tool.rs"
 [dependencies]
 anyhow.workspace = true
 collections.workspace = true
+clock.workspace = true
 derive_more.workspace = true
-language_model.workspace = true
 gpui.workspace = true
+language.workspace = true
+language_model.workspace = true
 parking_lot.workspace = true
 project.workspace = true
 serde.workspace = true

crates/assistant_tool/src/assistant_tool.rs

@@ -4,7 +4,9 @@ mod tool_working_set;
 use std::sync::Arc;
 
 use anyhow::Result;
-use gpui::{App, Entity, SharedString, Task};
+use collections::{HashMap, HashSet};
+use gpui::{App, Context, Entity, SharedString, Task};
+use language::Buffer;
 use language_model::LanguageModelRequestMessage;
 use project::Project;
 
@@ -41,12 +43,70 @@ pub trait Tool: 'static + Send + Sync {
         serde_json::Value::Object(serde_json::Map::default())
     }
 
+    /// Returns markdown to be displayed in the UI for this tool.
+    fn ui_text(&self, input: &serde_json::Value) -> String;
+
     /// Runs the tool with the provided input.
     fn run(
         self: Arc<Self>,
         input: serde_json::Value,
         messages: &[LanguageModelRequestMessage],
         project: Entity<Project>,
+        action_log: Entity<ActionLog>,
         cx: &mut App,
     ) -> Task<Result<String>>;
 }
+
+/// Tracks actions performed by tools in a thread
+#[derive(Debug)]
+pub struct ActionLog {
+    /// Buffers that user manually added to the context, and whose content has
+    /// changed since the model last saw them.
+    stale_buffers_in_context: HashSet<Entity<Buffer>>,
+    /// Buffers that we want to notify the model about when they change.
+    tracked_buffers: HashMap<Entity<Buffer>, TrackedBuffer>,
+}
+
+#[derive(Debug, Default)]
+struct TrackedBuffer {
+    version: clock::Global,
+}
+
+impl ActionLog {
+    /// Creates a new, empty action log.
+    pub fn new() -> Self {
+        Self {
+            stale_buffers_in_context: HashSet::default(),
+            tracked_buffers: HashMap::default(),
+        }
+    }
+
+    /// Track a buffer as read, so we can notify the model about user edits.
+    pub fn buffer_read(&mut self, buffer: Entity<Buffer>, cx: &mut Context<Self>) {
+        let tracked_buffer = self.tracked_buffers.entry(buffer.clone()).or_default();
+        tracked_buffer.version = buffer.read(cx).version();
+    }
+
+    /// Mark a buffer as edited, so we can refresh it in the context
+    pub fn buffer_edited(&mut self, buffers: HashSet<Entity<Buffer>>, cx: &mut Context<Self>) {
+        for buffer in &buffers {
+            let tracked_buffer = self.tracked_buffers.entry(buffer.clone()).or_default();
+            tracked_buffer.version = buffer.read(cx).version();
+        }
+
+        self.stale_buffers_in_context.extend(buffers);
+    }
+
+    /// Iterate over buffers changed since last read or edited by the model
+    pub fn stale_buffers<'a>(&'a self, cx: &'a App) -> impl Iterator<Item = &'a Entity<Buffer>> {
+        self.tracked_buffers
+            .iter()
+            .filter(|(buffer, tracked)| tracked.version != buffer.read(cx).version)
+            .map(|(buffer, _)| buffer)
+    }
+
+    /// Takes and returns the set of buffers pending refresh, clearing internal state.
+    pub fn take_stale_buffers_in_context(&mut self) -> HashSet<Entity<Buffer>> {
+        std::mem::take(&mut self.stale_buffers_in_context)
+    }
+}

crates/assistant_tools/Cargo.toml

@@ -19,6 +19,9 @@ collections.workspace = true
 feature_flags.workspace = true
 futures.workspace = true
 gpui.workspace = true
+html_to_markdown.workspace = true
+http_client.workspace = true
+itertools.workspace = true
 language.workspace = true
 language_model.workspace = true
 project.workspace = true
@@ -26,15 +29,18 @@ release_channel.workspace = true
 schemars.workspace = true
 serde.workspace = true
 serde_json.workspace = true
+settings.workspace = true
 theme.workspace = true
 ui.workspace = true
 util.workspace = true
 workspace.workspace = true
-settings.workspace = true
+worktree.workspace = true
 
 [dev-dependencies]
-rand.workspace = true
 collections = { workspace = true, features = ["test-support"] }
 gpui = { workspace = true, features = ["test-support"] }
 language = { workspace = true, features = ["test-support"] }
 project = { workspace = true, features = ["test-support"] }
+rand.workspace = true
+workspace = { workspace = true, features = ["test-support"] }
+unindent.workspace = true

crates/assistant_tools/src/assistant_tools.rs

@@ -2,26 +2,33 @@ mod bash_tool;
 mod delete_path_tool;
 mod diagnostics_tool;
 mod edit_files_tool;
+mod fetch_tool;
 mod list_directory_tool;
 mod now_tool;
 mod path_search_tool;
 mod read_file_tool;
-mod regex_search;
+mod regex_search_tool;
+mod thinking_tool;
+
+use std::sync::Arc;
 
 use assistant_tool::ToolRegistry;
 use gpui::App;
+use http_client::HttpClientWithUrl;
 
 use crate::bash_tool::BashTool;
 use crate::delete_path_tool::DeletePathTool;
 use crate::diagnostics_tool::DiagnosticsTool;
 use crate::edit_files_tool::EditFilesTool;
+use crate::fetch_tool::FetchTool;
 use crate::list_directory_tool::ListDirectoryTool;
 use crate::now_tool::NowTool;
 use crate::path_search_tool::PathSearchTool;
 use crate::read_file_tool::ReadFileTool;
-use crate::regex_search::RegexSearchTool;
+use crate::regex_search_tool::RegexSearchTool;
+use crate::thinking_tool::ThinkingTool;
 
-pub fn init(cx: &mut App) {
+pub fn init(http_client: Arc<HttpClientWithUrl>, cx: &mut App) {
     assistant_tool::init(cx);
     crate::edit_files_tool::log::init(cx);
 
@@ -35,4 +42,6 @@ pub fn init(cx: &mut App) {
     registry.register_tool(PathSearchTool);
     registry.register_tool(ReadFileTool);
     registry.register_tool(RegexSearchTool);
+    registry.register_tool(ThinkingTool);
+    registry.register_tool(FetchTool::new(http_client));
 }

crates/assistant_tools/src/bash_tool.rs

@@ -1,5 +1,5 @@
 use anyhow::{anyhow, Context as _, Result};
-use assistant_tool::Tool;
+use assistant_tool::{ActionLog, Tool};
 use gpui::{App, Entity, Task};
 use language_model::LanguageModelRequestMessage;
 use project::Project;
@@ -32,11 +32,19 @@ impl Tool for BashTool {
         serde_json::to_value(&schema).unwrap()
     }
 
+    fn ui_text(&self, input: &serde_json::Value) -> String {
+        match serde_json::from_value::<BashToolInput>(input.clone()) {
+            Ok(input) => format!("`$ {}`", input.command),
+            Err(_) => "Run bash command".to_string(),
+        }
+    }
+
     fn run(
         self: Arc<Self>,
         input: serde_json::Value,
         _messages: &[LanguageModelRequestMessage],
         project: Entity<Project>,
+        _action_log: Entity<ActionLog>,
         cx: &mut App,
     ) -> Task<Result<String>> {
         let input: BashToolInput = match serde_json::from_value(input) {
@@ -49,7 +57,7 @@ impl Tool for BashTool {
         };
         let working_directory = worktree.read(cx).abs_path();
 
-        cx.spawn(|_| async move {
+        cx.spawn(async move |_| {
             // Add 2>&1 to merge stderr into stdout for proper interleaving.
             let command = format!("({}) 2>&1", input.command);
 

crates/assistant_tools/src/delete_path_tool.rs

@@ -1,16 +1,15 @@
 use anyhow::{anyhow, Result};
-use assistant_tool::Tool;
-use gpui::{App, Entity, Task};
+use assistant_tool::{ActionLog, Tool};
+use gpui::{App, AppContext, Entity, Task};
 use language_model::LanguageModelRequestMessage;
 use project::Project;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
-use std::{fs, path::PathBuf, sync::Arc};
-use util::paths::PathMatcher;
+use std::sync::Arc;
 
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct DeletePathToolInput {
-    /// The glob to match files in the project to delete.
+    /// The path of the file or directory to delete.
     ///
     /// <example>
     /// If the project has the following files:
@@ -19,9 +18,9 @@ pub struct DeletePathToolInput {
     /// - directory2/a/things.txt
     /// - directory3/a/other.txt
     ///
-    /// You can delete the first two files by providing a glob of "*thing*.txt"
+    /// You can delete the first file by providing a path of "directory1/a/something.txt"
     /// </example>
-    pub glob: String,
+    pub path: String,
 }
 
 pub struct DeletePathTool;
@@ -40,126 +39,40 @@ impl Tool for DeletePathTool {
         serde_json::to_value(&schema).unwrap()
     }
 
+    fn ui_text(&self, input: &serde_json::Value) -> String {
+        match serde_json::from_value::<DeletePathToolInput>(input.clone()) {
+            Ok(input) => format!("Delete “`{}`”", input.path),
+            Err(_) => "Delete path".to_string(),
+        }
+    }
+
     fn run(
         self: Arc<Self>,
         input: serde_json::Value,
         _messages: &[LanguageModelRequestMessage],
         project: Entity<Project>,
+        _action_log: Entity<ActionLog>,
         cx: &mut App,
     ) -> Task<Result<String>> {
-        let glob = match serde_json::from_value::<DeletePathToolInput>(input) {
-            Ok(input) => input.glob,
+        let path_str = match serde_json::from_value::<DeletePathToolInput>(input) {
+            Ok(input) => input.path,
             Err(err) => return Task::ready(Err(anyhow!(err))),
         };
-        let path_matcher = match PathMatcher::new(&[glob.clone()]) {
-            Ok(matcher) => matcher,
-            Err(err) => return Task::ready(Err(anyhow!("Invalid glob: {}", err))),
-        };
 
-        struct Match {
-            display_path: String,
-            path: PathBuf,
-        }
-
-        let mut matches = Vec::new();
-        let mut deleted_paths = Vec::new();
-        let mut errors = Vec::new();
-
-        for worktree_handle in project.read(cx).worktrees(cx) {
-            let worktree = worktree_handle.read(cx);
-            let worktree_root = worktree.abs_path().to_path_buf();
-
-            // Don't consider ignored entries.
-            for entry in worktree.entries(false, 0) {
-                if path_matcher.is_match(&entry.path) {
-                    matches.push(Match {
-                        path: worktree_root.join(&entry.path),
-                        display_path: entry.path.display().to_string(),
-                    });
+        match project
+            .read(cx)
+            .find_project_path(&path_str, cx)
+            .and_then(|path| project.update(cx, |project, cx| project.delete_file(path, false, cx)))
+        {
+            Some(deletion_task) => cx.background_spawn(async move {
+                match deletion_task.await {
+                    Ok(()) => Ok(format!("Deleted {path_str}")),
+                    Err(err) => Err(anyhow!("Failed to delete {path_str}: {err}")),
                 }
-            }
-        }
-
-        if matches.is_empty() {
-            return Task::ready(Ok(format!("No paths in the project matched {glob:?}")));
-        }
-
-        let paths_matched = matches.len();
-
-        // Delete the files
-        for Match { path, display_path } in matches {
-            match fs::remove_file(&path) {
-                Ok(()) => {
-                    deleted_paths.push(display_path);
-                }
-                Err(file_err) => {
-                    // Try to remove directory if it's not a file. Retrying as a directory
-                    // on error saves a syscall compared to checking whether it's
-                    // a directory up front for every single file.
-                    if let Err(dir_err) = fs::remove_dir_all(&path) {
-                        let error = if path.is_dir() {
-                            format!("Failed to delete directory {}: {dir_err}", display_path)
-                        } else {
-                            format!("Failed to delete file {}: {file_err}", display_path)
-                        };
-
-                        errors.push(error);
-                    } else {
-                        deleted_paths.push(display_path);
-                    }
-                }
-            }
-        }
-
-        if errors.is_empty() {
-            // 0 deleted paths should never happen if there were no errors;
-            // we already returned if matches was empty.
-            let answer = if deleted_paths.len() == 1 {
-                format!(
-                    "Deleted {}",
-                    deleted_paths.first().unwrap_or(&String::new())
-                )
-            } else {
-                // Sort to group entries in the same directory together
-                deleted_paths.sort();
-
-                let mut buf = format!("Deleted these {} paths:\n", deleted_paths.len());
-
-                for path in deleted_paths.iter() {
-                    buf.push('\n');
-                    buf.push_str(path);
-                }
-
-                buf
-            };
-
-            Task::ready(Ok(answer))
-        } else {
-            if deleted_paths.is_empty() {
-                Task::ready(Err(anyhow!(
-                    "{glob:?} matched {} deleted because of {}:\n{}",
-                    if paths_matched == 1 {
-                        "1 path, but it was not".to_string()
-                    } else {
-                        format!("{} paths, but none were", paths_matched)
-                    },
-                    if errors.len() == 1 {
-                        "this error".to_string()
-                    } else {
-                        format!("{} errors", errors.len())
-                    },
-                    errors.join("\n")
-                )))
-            } else {
-                // Sort to group entries in the same directory together
-                deleted_paths.sort();
-                Task::ready(Ok(format!(
-                    "Deleted {} paths matching glob {glob:?}:\n{}\n\nErrors:\n{}",
-                    deleted_paths.len(),
-                    deleted_paths.join("\n"),
-                    errors.join("\n")
-                )))
-            }
+            }),
+            None => Task::ready(Err(anyhow!(
+                "Couldn't delete {path_str} because that path isn't in this project."
+            ))),
         }
     }
 }

crates/assistant_tools/src/delete_path_tool/description.md

@@ -1 +1 @@
-Deletes all files and directories in the project which match the given glob, and returns a list of the paths that were deleted.
+Deletes the file or directory (and the directory's contents, recursively) at the specified path in the project, and returns confirmation of the deletion.

crates/assistant_tools/src/diagnostics_tool.rs

@@ -1,5 +1,5 @@
 use anyhow::{anyhow, Result};
-use assistant_tool::Tool;
+use assistant_tool::{ActionLog, Tool};
 use gpui::{App, Entity, Task};
 use language::{DiagnosticSeverity, OffsetRangeExt};
 use language_model::LanguageModelRequestMessage;
@@ -46,28 +46,41 @@ impl Tool for DiagnosticsTool {
         serde_json::to_value(&schema).unwrap()
     }
 
+    fn ui_text(&self, input: &serde_json::Value) -> String {
+        if let Some(path) = serde_json::from_value::<DiagnosticsToolInput>(input.clone())
+            .ok()
+            .and_then(|input| input.path)
+        {
+            format!("Check diagnostics for “`{}`”", path.display())
+        } else {
+            "Check project diagnostics".to_string()
+        }
+    }
+
     fn run(
         self: Arc<Self>,
         input: serde_json::Value,
         _messages: &[LanguageModelRequestMessage],
         project: Entity<Project>,
+        _action_log: Entity<ActionLog>,
         cx: &mut App,
     ) -> Task<Result<String>> {
-        let input = match serde_json::from_value::<DiagnosticsToolInput>(input) {
-            Ok(input) => input,
-            Err(err) => return Task::ready(Err(anyhow!(err))),
-        };
-
-        if let Some(path) = input.path {
+        if let Some(path) = serde_json::from_value::<DiagnosticsToolInput>(input)
+            .ok()
+            .and_then(|input| input.path)
+        {
             let Some(project_path) = project.read(cx).find_project_path(&path, cx) else {
-                return Task::ready(Err(anyhow!("Could not find path in project")));
+                return Task::ready(Err(anyhow!(
+                    "Could not find path {} in project",
+                    path.display()
+                )));
             };
             let buffer = project.update(cx, |project, cx| project.open_buffer(project_path, cx));
 
-            cx.spawn(|cx| async move {
+            cx.spawn(async move |cx| {
                 let mut output = String::new();
                 let buffer = buffer.await?;
-                let snapshot = buffer.read_with(&cx, |buffer, _cx| buffer.snapshot())?;
+                let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
 
                 for (_, group) in snapshot.diagnostic_groups(None) {
                     let entry = &group.entries[group.primary_ix];

crates/assistant_tools/src/edit_files_tool.rs

@@ -1,32 +1,30 @@
 mod edit_action;
 pub mod log;
+mod replace;
 
 use anyhow::{anyhow, Context, Result};
-use assistant_tool::Tool;
+use assistant_tool::{ActionLog, Tool};
 use collections::HashSet;
 use edit_action::{EditAction, EditActionParser};
 use futures::StreamExt;
 use gpui::{App, AsyncApp, Entity, Task};
 use language_model::{
-    LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage, Role,
+    LanguageModelRegistry, LanguageModelRequest, LanguageModelRequestMessage, MessageContent, Role,
 };
 use log::{EditToolLog, EditToolRequestId};
-use project::{search::SearchQuery, Project};
+use project::Project;
+use replace::{replace_exact, replace_with_flexible_indent};
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 use std::fmt::Write;
 use std::sync::Arc;
-use util::paths::PathMatcher;
 use util::ResultExt;
 
 #[derive(Debug, Serialize, Deserialize, JsonSchema)]
 pub struct EditFilesToolInput {
     /// High-level edit instructions. These will be interpreted by a smaller
     /// model, so explain the changes you want that model to make and which
-    /// file paths need changing.
-    ///
-    /// The description should be concise and clear. We will show this
-    /// description to the user as well.
+    /// file paths need changing. The description should be concise and clear.
     ///
     /// WARNING: When specifying which file paths need changing, you MUST
     /// start each path with one of the project's root directories.
@@ -57,6 +55,21 @@ pub struct EditFilesToolInput {
     /// Notice how we never specify code snippets in the instructions!
     /// </example>
     pub edit_instructions: String,
+
+    /// A user-friendly description of what changes are being made.
+    /// This will be shown to the user in the UI to describe the edit operation. The screen real estate for this UI will be extremely
+    /// constrained, so make the description extremely terse.
+    ///
+    /// <example>
+    /// For fixing a broken authentication system:
+    /// "Fix auth bug in login flow"
+    /// </example>
+    ///
+    /// <example>
+    /// For adding unit tests to a module:
+    /// "Add tests for user profile logic"
+    /// </example>
+    pub display_description: String,
 }
 
 pub struct EditFilesTool;
@@ -75,11 +88,19 @@ impl Tool for EditFilesTool {
         serde_json::to_value(&schema).unwrap()
     }
 
+    fn ui_text(&self, input: &serde_json::Value) -> String {
+        match serde_json::from_value::<EditFilesToolInput>(input.clone()) {
+            Ok(input) => input.display_description,
+            Err(_) => "Edit files".to_string(),
+        }
+    }
+
     fn run(
         self: Arc<Self>,
         input: serde_json::Value,
         messages: &[LanguageModelRequestMessage],
         project: Entity<Project>,
+        action_log: Entity<ActionLog>,
         cx: &mut App,
     ) -> Task<Result<String>> {
         let input = match serde_json::from_value::<EditFilesToolInput>(input) {
@@ -93,10 +114,16 @@ impl Tool for EditFilesTool {
                     log.new_request(input.edit_instructions.clone(), cx)
                 });
 
-                let task =
-                    EditToolRequest::new(input, messages, project, Some((log.clone(), req_id)), cx);
+                let task = EditToolRequest::new(
+                    input,
+                    messages,
+                    project,
+                    action_log,
+                    Some((log.clone(), req_id)),
+                    cx,
+                );
 
-                cx.spawn(|mut cx| async move {
+                cx.spawn(async move |cx| {
                     let result = task.await;
 
                     let str_result = match &result {
@@ -104,38 +131,53 @@ impl Tool for EditFilesTool {
                         Err(err) => Err(err.to_string()),
                     };
 
-                    log.update(&mut cx, |log, cx| {
-                        log.set_tool_output(req_id, str_result, cx)
-                    })
-                    .log_err();
+                    log.update(cx, |log, cx| log.set_tool_output(req_id, str_result, cx))
+                        .log_err();
 
                     result
                 })
             }
 
-            None => EditToolRequest::new(input, messages, project, None, cx),
+            None => EditToolRequest::new(input, messages, project, action_log, None, cx),
         }
     }
 }
 
 struct EditToolRequest {
     parser: EditActionParser,
-    changed_buffers: HashSet<Entity<language::Buffer>>,
-    bad_searches: Vec<BadSearch>,
+    editor_response: EditorResponse,
     project: Entity<Project>,
-    log: Option<(Entity<EditToolLog>, EditToolRequestId)>,
+    action_log: Entity<ActionLog>,
+    tool_log: Option<(Entity<EditToolLog>, EditToolRequestId)>,
+}
+
+enum EditorResponse {
+    /// The editor model hasn't produced any actions yet.
+    /// If we don't have any by the end, we'll return its message to the architect model.
+    Message(String),
+    /// The editor model produced at least one action.
+    Actions {
+        applied: Vec<AppliedAction>,
+        search_errors: Vec<SearchError>,
+    },
+}
+
+struct AppliedAction {
+    source: String,
+    buffer: Entity<language::Buffer>,
 }
 
 #[derive(Debug)]
-enum DiffResult {
-    BadSearch(BadSearch),
-    Diff(language::Diff),
-}
-
-#[derive(Debug)]
-struct BadSearch {
-    file_path: String,
-    search: String,
+enum SearchError {
+    NoMatch {
+        file_path: String,
+        search: String,
+    },
+    EmptyBuffer {
+        file_path: String,
+        search: String,
+        exists: bool,
+    },
 }
 
 impl EditToolRequest {
@@ -143,7 +185,8 @@ impl EditToolRequest {
         input: EditFilesToolInput,
         messages: &[LanguageModelRequestMessage],
         project: Entity<Project>,
-        log: Option<(Entity<EditToolLog>, EditToolRequestId)>,
+        action_log: Entity<ActionLog>,
+        tool_log: Option<(Entity<EditToolLog>, EditToolRequestId)>,
         cx: &mut App,
     ) -> Task<Result<String>> {
         let model_registry = LanguageModelRegistry::read_global(cx);
@@ -152,12 +195,23 @@ impl EditToolRequest {
         };
 
         let mut messages = messages.to_vec();
-        if let Some(last_message) = messages.last_mut() {
-            // Strip out tool use from the last message because we're in the middle of executing a tool call.
-            last_message
-                .content
-                .retain(|content| !matches!(content, language_model::MessageContent::ToolUse(_)))
+        // Remove the last tool use (this run) to prevent an invalid request
+        'outer: for message in messages.iter_mut().rev() {
+            for (index, content) in message.content.iter().enumerate().rev() {
+                match content {
+                    MessageContent::ToolUse(_) => {
+                        message.content.remove(index);
+                        break 'outer;
+                    }
+                    MessageContent::ToolResult(_) => {
+                        // If we find any tool results before a tool use, the request is already valid
+                        break 'outer;
+                    }
+                    MessageContent::Text(_) | MessageContent::Image(_) => {}
+                }
+            }
         }
+
         messages.push(LanguageModelRequestMessage {
             role: Role::User,
             content: vec![
@@ -167,7 +221,7 @@ impl EditToolRequest {
             cache: false,
         });
 
-        cx.spawn(|mut cx| async move {
+        cx.spawn(async move |cx| {
             let llm_request = LanguageModelRequest {
                 messages,
                 tools: vec![],
@@ -180,24 +234,30 @@ impl EditToolRequest {
 
             let mut request = Self {
                 parser: EditActionParser::new(),
-                changed_buffers: HashSet::default(),
-                bad_searches: Vec::new(),
+                editor_response: EditorResponse::Message(String::with_capacity(256)),
+                action_log,
                 project,
-                log,
+                tool_log,
             };
 
             while let Some(chunk) = chunks.stream.next().await {
-                request.process_response_chunk(&chunk?, &mut cx).await?;
+                request.process_response_chunk(&chunk?, cx).await?;
             }
 
-            request.finalize(&mut cx).await
+            request.finalize(cx).await
         })
     }
 
     async fn process_response_chunk(&mut self, chunk: &str, cx: &mut AsyncApp) -> Result<()> {
         let new_actions = self.parser.parse_chunk(chunk);
 
-        if let Some((ref log, req_id)) = self.log {
+        if let EditorResponse::Message(ref mut message) = self.editor_response {
+            if new_actions.is_empty() {
+                message.push_str(chunk);
+            }
+        }
+
+        if let Some((ref log, req_id)) = self.tool_log {
             log.update(cx, |log, cx| {
                 log.push_editor_response_chunk(req_id, chunk, &new_actions, cx)
             })
@@ -211,7 +271,11 @@ impl EditToolRequest {
         Ok(())
     }
 
-    async fn apply_action(&mut self, action: EditAction, cx: &mut AsyncApp) -> Result<()> {
+    async fn apply_action(
+        &mut self,
+        (action, source): (EditAction, String),
+        cx: &mut AsyncApp,
+    ) -> Result<()> {
         let project_path = self.project.read_with(cx, |project, cx| {
             project
                 .find_project_path(action.file_path(), cx)
@@ -223,6 +287,11 @@ impl EditToolRequest {
             .update(cx, |project, cx| project.open_buffer(project_path, cx))?
             .await?;
 
+        enum DiffResult {
+            Diff(language::Diff),
+            SearchError(SearchError),
+        }
+
         let result = match action {
             EditAction::Replace {
                 old,
@@ -232,7 +301,39 @@ impl EditToolRequest {
                 let snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot())?;
 
                 cx.background_executor()
-                    .spawn(Self::replace_diff(old, new, file_path, snapshot))
+                    .spawn(async move {
+                        if snapshot.is_empty() {
+                            let exists = snapshot
+                                .file()
+                                .map_or(false, |file| file.disk_state().exists());
+
+                            let error = SearchError::EmptyBuffer {
+                                file_path: file_path.display().to_string(),
+                                exists,
+                                search: old,
+                            };
+
+                            return anyhow::Ok(DiffResult::SearchError(error));
+                        }
+
+                        let replace_result =
+                            // Try to match exactly
+                            replace_exact(&old, &new, &snapshot)
+                            .await
+                            // If that fails, try being flexible about indentation
+                            .or_else(|| replace_with_flexible_indent(&old, &new, &snapshot));
+
+                        let Some(diff) = replace_result else {
+                            let error = SearchError::NoMatch {
+                                search: old,
+                                file_path: file_path.display().to_string(),
+                            };
+
+                            return Ok(DiffResult::SearchError(error));
+                        };
+
+                        Ok(DiffResult::Diff(diff))
+                    })
                     .await
             }
             EditAction::Write { content, .. } => Ok(DiffResult::Diff(
@@ -243,133 +344,179 @@ impl EditToolRequest {
         }?;
 
         match result {
-            DiffResult::BadSearch(invalid_replace) => {
-                self.bad_searches.push(invalid_replace);
+            DiffResult::SearchError(error) => {
+                self.push_search_error(error);
             }
             DiffResult::Diff(diff) => {
                 let _clock = buffer.update(cx, |buffer, cx| buffer.apply_diff(diff, cx))?;
 
-                self.changed_buffers.insert(buffer);
+                self.push_applied_action(AppliedAction { source, buffer });
             }
         }
 
-        Ok(())
+        anyhow::Ok(())
     }
 
-    async fn replace_diff(
-        old: String,
-        new: String,
-        file_path: std::path::PathBuf,
-        snapshot: language::BufferSnapshot,
-    ) -> Result<DiffResult> {
-        let query = SearchQuery::text(
-            old.clone(),
-            false,
-            true,
-            true,
-            PathMatcher::new(&[])?,
-            PathMatcher::new(&[])?,
-            None,
-        )?;
-
-        let matches = query.search(&snapshot, None).await;
-
-        if matches.is_empty() {
-            return Ok(DiffResult::BadSearch(BadSearch {
-                search: new.clone(),
-                file_path: file_path.display().to_string(),
-            }));
+    fn push_search_error(&mut self, error: SearchError) {
+        match &mut self.editor_response {
+            EditorResponse::Message(_) => {
+                self.editor_response = EditorResponse::Actions {
+                    applied: Vec::new(),
+                    search_errors: vec![error],
+                };
+            }
+            EditorResponse::Actions { search_errors, .. } => {
+                search_errors.push(error);
+            }
         }
+    }
 
-        let edit_range = matches[0].clone();
-        let diff = language::text_diff(&old, &new);
-
-        let edits = diff
-            .into_iter()
-            .map(|(old_range, text)| {
-                let start = edit_range.start + old_range.start;
-                let end = edit_range.start + old_range.end;
-                (start..end, text)
-            })
-            .collect::<Vec<_>>();
-
-        let diff = language::Diff {
-            base_version: snapshot.version().clone(),
-            line_ending: snapshot.line_ending(),
-            edits,
-        };
-
-        anyhow::Ok(DiffResult::Diff(diff))
+    fn push_applied_action(&mut self, action: AppliedAction) {
+        match &mut self.editor_response {
+            EditorResponse::Message(_) => {
+                self.editor_response = EditorResponse::Actions {
+                    applied: vec![action],
+                    search_errors: Vec::new(),
+                };
+            }
+            EditorResponse::Actions { applied, .. } => {
+                applied.push(action);
+            }
+        }
     }
 
     async fn finalize(self, cx: &mut AsyncApp) -> Result<String> {
-        let mut answer = match self.changed_buffers.len() {
-            0 => "No files were edited.".to_string(),
-            1 => "Successfully edited ".to_string(),
-            _ => "Successfully edited these files:\n\n".to_string(),
-        };
+        match self.editor_response {
+            EditorResponse::Message(message) => Err(anyhow!(
+                "No edits were applied! You might need to provide more context.\n\n{}",
+                message
+            )),
+            EditorResponse::Actions {
+                applied,
+                search_errors,
+            } => {
+                let mut output = String::with_capacity(1024);
 
-        // Save each buffer once at the end
-        for buffer in self.changed_buffers {
-            let (path, save_task) = self.project.update(cx, |project, cx| {
-                let path = buffer
-                    .read(cx)
-                    .file()
-                    .map(|file| file.path().display().to_string());
+                let parse_errors = self.parser.errors();
+                let has_errors = !search_errors.is_empty() || !parse_errors.is_empty();
 
-                let task = project.save_buffer(buffer.clone(), cx);
+                if has_errors {
+                    let error_count = search_errors.len() + parse_errors.len();
 
-                (path, task)
-            })?;
+                    if applied.is_empty() {
+                        writeln!(
+                            &mut output,
+                            "{} errors occurred! No edits were applied.",
+                            error_count,
+                        )?;
+                    } else {
+                        writeln!(
+                            &mut output,
+                            "{} errors occurred, but {} edits were correctly applied.",
+                            error_count,
+                            applied.len(),
+                        )?;
 
-            save_task.await?;
-
-            if let Some(path) = path {
-                writeln!(&mut answer, "{}", path)?;
-            }
-        }
-
-        let errors = self.parser.errors();
-
-        if errors.is_empty() && self.bad_searches.is_empty() {
-            Ok(answer.trim_end().to_string())
-        } else {
-            if !self.bad_searches.is_empty() {
-                writeln!(
-                    &mut answer,
-                    "\nThese searches failed because they didn't match any strings:"
-                )?;
-
-                for replace in self.bad_searches {
-                    writeln!(
-                        &mut answer,
-                        "- '{}' does not appear in `{}`",
-                        replace.search.replace("\r", "\\r").replace("\n", "\\n"),
-                        replace.file_path
+                        writeln!(
+                            &mut output,
+                            "# {} SEARCH/REPLACE block(s) applied:\n\nDo not re-send these since they are already applied!\n",
+                            applied.len()
+                        )?;
+                    }
+                } else {
+                    write!(
+                        &mut output,
+                        "Successfully applied! Here's a list of applied edits:"
                     )?;
                 }
 
-                writeln!(&mut answer, "Make sure to use exact searches.")?;
-            }
+                let mut changed_buffers = HashSet::default();
 
-            if !errors.is_empty() {
-                writeln!(
-                    &mut answer,
-                    "\nThese SEARCH/REPLACE blocks failed to parse:"
-                )?;
+                for action in applied {
+                    changed_buffers.insert(action.buffer);
+                    write!(&mut output, "\n\n{}", action.source)?;
+                }
 
-                for error in errors {
-                    writeln!(&mut answer, "- {}", error)?;
+                for buffer in &changed_buffers {
+                    self.project
+                        .update(cx, |project, cx| project.save_buffer(buffer.clone(), cx))?
+                        .await?;
+                }
+
+                self.action_log
+                    .update(cx, |log, cx| log.buffer_edited(changed_buffers.clone(), cx))
+                    .log_err();
+
+                if !search_errors.is_empty() {
+                    writeln!(
+                        &mut output,
+                        "\n\n## {} SEARCH/REPLACE block(s) failed to match:\n",
+                        search_errors.len()
+                    )?;
+
+                    for error in search_errors {
+                        match error {
+                            SearchError::NoMatch { file_path, search } => {
+                                writeln!(
+                                    &mut output,
+                                    "### No exact match in: `{}`\n```\n{}\n```\n",
+                                    file_path, search,
+                                )?;
+                            }
+                            SearchError::EmptyBuffer {
+                                file_path,
+                                exists: true,
+                                search,
+                            } => {
+                                writeln!(
+                                    &mut output,
+                                    "### No match because `{}` is empty:\n```\n{}\n```\n",
+                                    file_path, search,
+                                )?;
+                            }
+                            SearchError::EmptyBuffer {
+                                file_path,
+                                exists: false,
+                                search,
+                            } => {
+                                writeln!(
+                                    &mut output,
+                                    "### No match because `{}` does not exist:\n```\n{}\n```\n",
+                                    file_path, search,
+                                )?;
+                            }
+                        }
+                    }
+
+                    write!(&mut output,
+                        "The SEARCH section must exactly match an existing block of lines including all white \
+                        space, comments, indentation, docstrings, etc."
+                    )?;
+                }
+
+                if !parse_errors.is_empty() {
+                    writeln!(
+                        &mut output,
+                        "\n\n## {} SEARCH/REPLACE blocks failed to parse:",
+                        parse_errors.len()
+                    )?;
+
+                    for error in parse_errors {
+                        writeln!(&mut output, "- {}", error)?;
+                    }
+                }
+
+                if has_errors {
+                    writeln!(&mut output,
+                        "\n\nYou can fix errors by running the tool again. You can include instructions, \
+                        but errors are part of the conversation so you don't need to repeat them.",
+                    )?;
+
+                    Err(anyhow!(output))
+                } else {
+                    Ok(output)
                 }
             }
-
-            writeln!(
-                &mut answer,
-                "\nYou can fix errors by running the tool again. You can include instructions,\
-                but errors are part of the conversation so you don't need to repeat them."
-            )?;
-
-            Err(anyhow!(answer))
         }
     }
 }

crates/assistant_tools/src/edit_files_tool/edit_action.rs

@@ -1,4 +1,8 @@
-use std::path::{Path, PathBuf};
+use std::{
+    mem::take,
+    ops::Range,
+    path::{Path, PathBuf},
+};
 use util::ResultExt;
 
 /// Represents an edit action to be performed on a file.
@@ -28,12 +32,14 @@ impl EditAction {
 #[derive(Debug)]
 pub struct EditActionParser {
     state: State,
-    pre_fence_line: Vec<u8>,
-    marker_ix: usize,
     line: usize,
     column: usize,
-    old_bytes: Vec<u8>,
-    new_bytes: Vec<u8>,
+    marker_ix: usize,
+    action_source: Vec<u8>,
+    fence_start_offset: usize,
+    block_range: Range<usize>,
+    old_range: Range<usize>,
+    new_range: Range<usize>,
     errors: Vec<ParseError>,
 }
 
@@ -58,12 +64,14 @@ impl EditActionParser {
     pub fn new() -> Self {
         Self {
             state: State::Default,
-            pre_fence_line: Vec::new(),
-            marker_ix: 0,
             line: 1,
             column: 0,
-            old_bytes: Vec::new(),
-            new_bytes: Vec::new(),
+            action_source: Vec::new(),
+            fence_start_offset: 0,
+            marker_ix: 0,
+            block_range: Range::default(),
+            old_range: Range::default(),
+            new_range: Range::default(),
             errors: Vec::new(),
         }
     }
@@ -76,7 +84,7 @@ impl EditActionParser {
     ///
     /// If a block fails to parse, it will simply be skipped and an error will be recorded.
     /// All errors can be accessed through the `EditActionsParser::errors` method.
-    pub fn parse_chunk(&mut self, input: &str) -> Vec<EditAction> {
+    pub fn parse_chunk(&mut self, input: &str) -> Vec<(EditAction, String)> {
         use State::*;
 
         const FENCE: &[u8] = b"```";
@@ -97,20 +105,21 @@ impl EditActionParser {
                 self.column += 1;
             }
 
+            let action_offset = self.action_source.len();
+
             match &self.state {
-                Default => match match_marker(byte, FENCE, false, &mut self.marker_ix) {
+                Default => match self.match_marker(byte, FENCE, false) {
                     MarkerMatch::Complete => {
+                        self.fence_start_offset = action_offset + 1 - FENCE.len();
                         self.to_state(OpenFence);
                     }
                     MarkerMatch::Partial => {}
                     MarkerMatch::None => {
                         if self.marker_ix > 0 {
                             self.marker_ix = 0;
-                        } else if self.pre_fence_line.ends_with(b"\n") {
-                            self.pre_fence_line.clear();
+                        } else if self.action_source.ends_with(b"\n") {
+                            self.action_source.clear();
                         }
-
-                        self.pre_fence_line.push(byte);
                     }
                 },
                 OpenFence => {
@@ -125,39 +134,34 @@ impl EditActionParser {
                     }
                 }
                 SearchBlock => {
-                    if collect_until_marker(
-                        byte,
-                        DIVIDER,
-                        NL_DIVIDER,
-                        true,
-                        &mut self.marker_ix,
-                        &mut self.old_bytes,
-                    ) {
+                    if self.extend_block_range(byte, DIVIDER, NL_DIVIDER) {
+                        self.old_range = take(&mut self.block_range);
                         self.to_state(ReplaceBlock);
                     }
                 }
                 ReplaceBlock => {
-                    if collect_until_marker(
-                        byte,
-                        REPLACE_MARKER,
-                        NL_REPLACE_MARKER,
-                        true,
-                        &mut self.marker_ix,
-                        &mut self.new_bytes,
-                    ) {
+                    if self.extend_block_range(byte, REPLACE_MARKER, NL_REPLACE_MARKER) {
+                        self.new_range = take(&mut self.block_range);
                         self.to_state(CloseFence);
                     }
                 }
                 CloseFence => {
                     if self.expect_marker(byte, FENCE, false) {
+                        self.action_source.push(byte);
+
                         if let Some(action) = self.action() {
                             actions.push(action);
                         }
+
                         self.errors();
                         self.reset();
+
+                        continue;
                     }
                 }
             };
+
+            self.action_source.push(byte);
         }
 
         actions
@@ -168,48 +172,44 @@ impl EditActionParser {
         &self.errors
     }
 
-    fn action(&mut self) -> Option<EditAction> {
-        if self.old_bytes.is_empty() && self.new_bytes.is_empty() {
-            self.push_error(ParseErrorKind::NoOp);
-            return None;
-        }
+    fn action(&mut self) -> Option<(EditAction, String)> {
+        let old_range = take(&mut self.old_range);
+        let new_range = take(&mut self.new_range);
 
-        let mut pre_fence_line = std::mem::take(&mut self.pre_fence_line);
+        let action_source = take(&mut self.action_source);
+        let action_source = String::from_utf8(action_source).log_err()?;
 
-        if pre_fence_line.ends_with(b"\n") {
-            pre_fence_line.pop();
-            pop_carriage_return(&mut pre_fence_line);
-        }
+        let mut file_path_bytes = action_source[..self.fence_start_offset].to_owned();
 
-        let file_path = PathBuf::from(String::from_utf8(pre_fence_line).log_err()?);
-        let content = String::from_utf8(std::mem::take(&mut self.new_bytes)).log_err()?;
-
-        if self.old_bytes.is_empty() {
-            Some(EditAction::Write { file_path, content })
-        } else {
-            let old = String::from_utf8(std::mem::take(&mut self.old_bytes)).log_err()?;
-
-            Some(EditAction::Replace {
-                file_path,
-                old,
-                new: content,
-            })
-        }
-    }
-
-    fn expect_marker(&mut self, byte: u8, marker: &'static [u8], trailing_newline: bool) -> bool {
-        match match_marker(byte, marker, trailing_newline, &mut self.marker_ix) {
-            MarkerMatch::Complete => true,
-            MarkerMatch::Partial => false,
-            MarkerMatch::None => {
-                self.push_error(ParseErrorKind::ExpectedMarker {
-                    expected: marker,
-                    found: byte,
-                });
-                self.reset();
-                false
+        if file_path_bytes.ends_with("\n") {
+            file_path_bytes.pop();
+            if file_path_bytes.ends_with("\r") {
+                file_path_bytes.pop();
             }
         }
+
+        let file_path = PathBuf::from(file_path_bytes);
+
+        if old_range.is_empty() {
+            return Some((
+                EditAction::Write {
+                    file_path,
+                    content: action_source[new_range].to_owned(),
+                },
+                action_source,
+            ));
+        }
+
+        let old = action_source[old_range].to_owned();
+        let new = action_source[new_range].to_owned();
+
+        let action = EditAction::Replace {
+            file_path,
+            old,
+            new,
+        };
+
+        Some((action, action_source))
     }
 
     fn to_state(&mut self, state: State) {
@@ -218,18 +218,95 @@ impl EditActionParser {
     }
 
     fn reset(&mut self) {
-        self.pre_fence_line.clear();
-        self.old_bytes.clear();
-        self.new_bytes.clear();
+        self.action_source.clear();
+        self.block_range = Range::default();
+        self.old_range = Range::default();
+        self.new_range = Range::default();
+        self.fence_start_offset = 0;
+        self.marker_ix = 0;
         self.to_state(State::Default);
     }
 
-    fn push_error(&mut self, kind: ParseErrorKind) {
-        self.errors.push(ParseError {
-            line: self.line,
-            column: self.column,
-            kind,
-        });
+    fn expect_marker(&mut self, byte: u8, marker: &'static [u8], trailing_newline: bool) -> bool {
+        match self.match_marker(byte, marker, trailing_newline) {
+            MarkerMatch::Complete => true,
+            MarkerMatch::Partial => false,
+            MarkerMatch::None => {
+                self.errors.push(ParseError {
+                    line: self.line,
+                    column: self.column,
+                    expected: marker,
+                    found: byte,
+                });
+
+                self.reset();
+                false
+            }
+        }
+    }
+
+    fn extend_block_range(&mut self, byte: u8, marker: &[u8], nl_marker: &[u8]) -> bool {
+        let marker = if self.block_range.is_empty() {
+            // do not require another newline if block is empty
+            marker
+        } else {
+            nl_marker
+        };
+
+        let offset = self.action_source.len();
+
+        match self.match_marker(byte, marker, true) {
+            MarkerMatch::Complete => {
+                if self.action_source[self.block_range.clone()].ends_with(b"\r") {
+                    self.block_range.end -= 1;
+                }
+
+                true
+            }
+            MarkerMatch::Partial => false,
+            MarkerMatch::None => {
+                if self.marker_ix > 0 {
+                    self.marker_ix = 0;
+                    self.block_range.end = offset;
+
+                    // The beginning of marker might match current byte
+                    match self.match_marker(byte, marker, true) {
+                        MarkerMatch::Complete => return true,
+                        MarkerMatch::Partial => return false,
+                        MarkerMatch::None => { /* no match, keep collecting */ }
+                    }
+                }
+
+                if self.block_range.is_empty() {
+                    self.block_range.start = offset;
+                }
+                self.block_range.end = offset + 1;
+
+                false
+            }
+        }
+    }
+
+    fn match_marker(&mut self, byte: u8, marker: &[u8], trailing_newline: bool) -> MarkerMatch {
+        if trailing_newline && self.marker_ix >= marker.len() {
+            if byte == b'\n' {
+                MarkerMatch::Complete
+            } else if byte == b'\r' {
+                MarkerMatch::Partial
+            } else {
+                MarkerMatch::None
+            }
+        } else if byte == marker[self.marker_ix] {
+            self.marker_ix += 1;
+
+            if self.marker_ix < marker.len() || trailing_newline {
+                MarkerMatch::Partial
+            } else {
+                MarkerMatch::Complete
+            }
+        } else {
+            MarkerMatch::None
+        }
     }
 }
 
@@ -240,114 +317,24 @@ enum MarkerMatch {
     Complete,
 }
 
-fn match_marker(
-    byte: u8,
-    marker: &[u8],
-    trailing_newline: bool,
-    marker_ix: &mut usize,
-) -> MarkerMatch {
-    if trailing_newline && *marker_ix >= marker.len() {
-        if byte == b'\n' {
-            MarkerMatch::Complete
-        } else if byte == b'\r' {
-            MarkerMatch::Partial
-        } else {
-            MarkerMatch::None
-        }
-    } else if byte == marker[*marker_ix] {
-        *marker_ix += 1;
-
-        if *marker_ix < marker.len() || trailing_newline {
-            MarkerMatch::Partial
-        } else {
-            MarkerMatch::Complete
-        }
-    } else {
-        MarkerMatch::None
-    }
-}
-
-fn collect_until_marker(
-    byte: u8,
-    marker: &[u8],
-    nl_marker: &[u8],
-    trailing_newline: bool,
-    marker_ix: &mut usize,
-    buf: &mut Vec<u8>,
-) -> bool {
-    let marker = if buf.is_empty() {
-        // do not require another newline if block is empty
-        marker
-    } else {
-        nl_marker
-    };
-
-    match match_marker(byte, marker, trailing_newline, marker_ix) {
-        MarkerMatch::Complete => {
-            pop_carriage_return(buf);
-            true
-        }
-        MarkerMatch::Partial => false,
-        MarkerMatch::None => {
-            if *marker_ix > 0 {
-                buf.extend_from_slice(&marker[..*marker_ix]);
-                *marker_ix = 0;
-
-                // The beginning of marker might match current byte
-                match match_marker(byte, marker, trailing_newline, marker_ix) {
-                    MarkerMatch::Complete => return true,
-                    MarkerMatch::Partial => return false,
-                    MarkerMatch::None => { /* no match, keep collecting */ }
-                }
-            }
-
-            buf.push(byte);
-
-            false
-        }
-    }
-}
-
-fn pop_carriage_return(buf: &mut Vec<u8>) {
-    if buf.ends_with(b"\r") {
-        buf.pop();
-    }
-}
-
 #[derive(Debug, PartialEq, Eq)]
 pub struct ParseError {
     line: usize,
     column: usize,
-    kind: ParseErrorKind,
-}
-
-#[derive(Debug, PartialEq, Eq)]
-pub enum ParseErrorKind {
-    ExpectedMarker { expected: &'static [u8], found: u8 },
-    NoOp,
-}
-
-impl std::fmt::Display for ParseErrorKind {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            ParseErrorKind::ExpectedMarker { expected, found } => {
-                write!(
-                    f,
-                    "Expected marker {:?}, found {:?}",
-                    String::from_utf8_lossy(expected),
-                    *found as char
-                )
-            }
-            ParseErrorKind::NoOp => {
-                write!(f, "No search or replace")
-            }
-        }
-    }
+    expected: &'static [u8],
+    found: u8,
 }
 
 impl std::fmt::Display for ParseError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "input:{}:{}: {}", self.line, self.column, self.kind)
+        write!(
+            f,
+            "input:{}:{}: Expected marker {:?}, found {:?}",
+            self.line,
+            self.column,
+            String::from_utf8_lossy(self.expected),
+            self.found as char
+        )
     }
 }
 
@@ -355,6 +342,7 @@ impl std::fmt::Display for ParseError {
 mod tests {
     use super::*;
     use rand::prelude::*;
+    use util::line_endings;
 
     #[test]
     fn test_simple_edit_action() {
@@ -371,16 +359,16 @@ fn replacement() {}
         let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(input);
 
+        assert_no_errors(&parser);
         assert_eq!(actions.len(), 1);
         assert_eq!(
-            actions[0],
+            actions[0].0,
             EditAction::Replace {
                 file_path: PathBuf::from("src/main.rs"),
                 old: "fn original() {}".to_string(),
                 new: "fn replacement() {}".to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -398,16 +386,16 @@ fn replacement() {}
         let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(input);
 
+        assert_no_errors(&parser);
         assert_eq!(actions.len(), 1);
         assert_eq!(
-            actions[0],
+            actions[0].0,
             EditAction::Replace {
                 file_path: PathBuf::from("src/main.rs"),
                 old: "fn original() {}".to_string(),
                 new: "fn replacement() {}".to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -429,16 +417,16 @@ This change makes the function better.
         let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(input);
 
+        assert_no_errors(&parser);
         assert_eq!(actions.len(), 1);
         assert_eq!(
-            actions[0],
+            actions[0].0,
             EditAction::Replace {
                 file_path: PathBuf::from("src/main.rs"),
                 old: "fn original() {}".to_string(),
                 new: "fn replacement() {}".to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -467,24 +455,27 @@ fn new_util() -> bool { true }
         let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(input);
 
+        assert_no_errors(&parser);
         assert_eq!(actions.len(), 2);
+
+        let (action, _) = &actions[0];
         assert_eq!(
-            actions[0],
-            EditAction::Replace {
+            action,
+            &EditAction::Replace {
                 file_path: PathBuf::from("src/main.rs"),
                 old: "fn original() {}".to_string(),
                 new: "fn replacement() {}".to_string(),
             }
         );
+        let (action2, _) = &actions[1];
         assert_eq!(
-            actions[1],
-            EditAction::Replace {
+            action2,
+            &EditAction::Replace {
                 file_path: PathBuf::from("src/utils.rs"),
                 old: "fn old_util() -> bool { false }".to_string(),
                 new: "fn new_util() -> bool { true }".to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -516,16 +507,18 @@ fn replacement() {
         let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(input);
 
+        assert_no_errors(&parser);
         assert_eq!(actions.len(), 1);
+
+        let (action, _) = &actions[0];
         assert_eq!(
-            actions[0],
-            EditAction::Replace {
+            action,
+            &EditAction::Replace {
                 file_path: PathBuf::from("src/main.rs"),
                 old: "fn original() {\n    println!(\"This is the original function\");\n    let x = 42;\n    if x > 0 {\n        println!(\"Positive number\");\n    }\n}".to_string(),
                 new: "fn replacement() {\n    println!(\"This is the replacement function\");\n    let x = 100;\n    if x > 50 {\n        println!(\"Large number\");\n    } else {\n        println!(\"Small number\");\n    }\n}".to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -546,16 +539,16 @@ fn new_function() {
         let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(input);
 
+        assert_no_errors(&parser);
         assert_eq!(actions.len(), 1);
         assert_eq!(
-            actions[0],
+            actions[0].0,
             EditAction::Write {
                 file_path: PathBuf::from("src/main.rs"),
                 content: "fn new_function() {\n    println!(\"This function is being added\");\n}"
                     .to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -573,9 +566,11 @@ fn this_will_be_deleted() {
 
         let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(&input);
+
+        assert_no_errors(&parser);
         assert_eq!(actions.len(), 1);
         assert_eq!(
-            actions[0],
+            actions[0].0,
             EditAction::Replace {
                 file_path: PathBuf::from("src/main.rs"),
                 old: "fn this_will_be_deleted() {\n    println!(\"Deleting this function\");\n}"
@@ -583,12 +578,13 @@ fn this_will_be_deleted() {
                 new: "".to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
 
+        let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(&input.replace("\n", "\r\n"));
+        assert_no_errors(&parser);
         assert_eq!(actions.len(), 1);
         assert_eq!(
-            actions[0],
+            actions[0].0,
             EditAction::Replace {
                 file_path: PathBuf::from("src/main.rs"),
                 old:
@@ -597,7 +593,6 @@ fn this_will_be_deleted() {
                 new: "".to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -613,15 +608,15 @@ fn this_will_be_deleted() {
         let mut parser = EditActionParser::new();
         let actions = parser.parse_chunk(input);
 
-        // Should not create an action when both sections are empty
-        assert_eq!(actions.len(), 0);
-
-        // Check that the NoOp error was added
-        assert_eq!(parser.errors().len(), 1);
-        match parser.errors()[0].kind {
-            ParseErrorKind::NoOp => {}
-            _ => panic!("Expected NoOp error"),
-        }
+        assert_eq!(actions.len(), 1);
+        assert_eq!(
+            actions[0].0,
+            EditAction::Write {
+                file_path: PathBuf::from("src/main.rs"),
+                content: String::new(),
+            }
+        );
+        assert_no_errors(&parser);
     }
 
     #[test]
@@ -642,26 +637,27 @@ fn replacement() {}"#;
 
         let mut parser = EditActionParser::new();
         let actions1 = parser.parse_chunk(input_part1);
+        assert_no_errors(&parser);
         assert_eq!(actions1.len(), 0);
-        assert_eq!(parser.errors().len(), 0);
 
         let actions2 = parser.parse_chunk(input_part2);
         // No actions should be complete yet
+        assert_no_errors(&parser);
         assert_eq!(actions2.len(), 0);
-        assert_eq!(parser.errors().len(), 0);
 
         let actions3 = parser.parse_chunk(input_part3);
         // The third chunk should complete the action
+        assert_no_errors(&parser);
         assert_eq!(actions3.len(), 1);
+        let (action, _) = &actions3[0];
         assert_eq!(
-            actions3[0],
-            EditAction::Replace {
+            action,
+            &EditAction::Replace {
                 file_path: PathBuf::from("src/main.rs"),
                 old: "fn original() {}".to_string(),
                 new: "fn replacement() {}".to_string(),
             }
         );
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -670,28 +666,35 @@ fn replacement() {}"#;
         let actions1 = parser.parse_chunk("src/main.rs\n```rust\n<<<<<<< SEARCH\n");
 
         // Check parser is in the correct state
+        assert_no_errors(&parser);
         assert_eq!(parser.state, State::SearchBlock);
-        assert_eq!(parser.pre_fence_line, b"src/main.rs\n");
-        assert_eq!(parser.errors().len(), 0);
+        assert_eq!(
+            parser.action_source,
+            b"src/main.rs\n```rust\n<<<<<<< SEARCH\n"
+        );
 
         // Continue parsing
         let actions2 = parser.parse_chunk("original code\n=======\n");
+
+        assert_no_errors(&parser);
         assert_eq!(parser.state, State::ReplaceBlock);
-        assert_eq!(parser.old_bytes, b"original code");
-        assert_eq!(parser.errors().len(), 0);
+        assert_eq!(
+            &parser.action_source[parser.old_range.clone()],
+            b"original code"
+        );
 
         let actions3 = parser.parse_chunk("replacement code\n>>>>>>> REPLACE\n```\n");
 
         // After complete parsing, state should reset
+        assert_no_errors(&parser);
         assert_eq!(parser.state, State::Default);
-        assert_eq!(parser.pre_fence_line, b"\n");
-        assert!(parser.old_bytes.is_empty());
-        assert!(parser.new_bytes.is_empty());
+        assert_eq!(parser.action_source, b"\n");
+        assert!(parser.old_range.is_empty());
+        assert!(parser.new_range.is_empty());
 
         assert_eq!(actions1.len(), 0);
         assert_eq!(actions2.len(), 0);
         assert_eq!(actions3.len(), 1);
-        assert_eq!(parser.errors().len(), 0);
     }
 
     #[test]
@@ -745,9 +748,10 @@ fn new_utils_func() {}
 
         // Only the second block should be parsed
         assert_eq!(actions.len(), 1);
+        let (action, _) = &actions[0];
         assert_eq!(
-            actions[0],
-            EditAction::Replace {
+            action,
+            &EditAction::Replace {
                 file_path: PathBuf::from("src/utils.rs"),
                 old: "fn utils_func() {}".to_string(),
                 new: "fn new_utils_func() {}".to_string(),
@@ -756,7 +760,7 @@ fn new_utils_func() {}
         assert_eq!(parser.errors().len(), 1);
         assert_eq!(
             parser.errors()[0].to_string(),
-            "input:8:1: Expected marker \"```\", found '<'".to_string()
+            "input:8:1: Expected marker \"```\", found '<'"
         );
 
         // The parser should continue after an error
@@ -783,64 +787,65 @@ fn new_utils_func() {}
 
             let (chunk, rest) = remaining.split_at(chunk_size);
 
-            actions.extend(parser.parse_chunk(chunk));
+            let chunk_actions = parser.parse_chunk(chunk);
+            actions.extend(chunk_actions);
             remaining = rest;
         }
 
         assert_examples_in_system_prompt(&actions, parser.errors());
     }
 
-    fn assert_examples_in_system_prompt(actions: &[EditAction], errors: &[ParseError]) {
+    fn assert_examples_in_system_prompt(actions: &[(EditAction, String)], errors: &[ParseError]) {
         assert_eq!(actions.len(), 5);
 
         assert_eq!(
-            actions[0],
+            actions[0].0,
             EditAction::Replace {
                 file_path: PathBuf::from("mathweb/flask/app.py"),
                 old: "from flask import Flask".to_string(),
-                new: "import math\nfrom flask import Flask".to_string(),
-            }
-            .fix_lf(),
+                new: line_endings!("import math\nfrom flask import Flask").to_string(),
+            },
         );
 
         assert_eq!(
-            actions[1],
+            actions[1].0,
             EditAction::Replace {
                 file_path: PathBuf::from("mathweb/flask/app.py"),
-                old: "def factorial(n):\n    \"compute factorial\"\n\n    if n == 0:\n        return 1\n    else:\n        return n * factorial(n-1)\n".to_string(),
+                old: line_endings!("def factorial(n):\n    \"compute factorial\"\n\n    if n == 0:\n        return 1\n    else:\n        return n * factorial(n-1)\n").to_string(),
                 new: "".to_string(),
             }
-            .fix_lf()
         );
 
         assert_eq!(
-            actions[2],
+            actions[2].0,
             EditAction::Replace {
                 file_path: PathBuf::from("mathweb/flask/app.py"),
                 old: "    return str(factorial(n))".to_string(),
                 new: "    return str(math.factorial(n))".to_string(),
-            }
-            .fix_lf(),
+            },
         );
 
         assert_eq!(
-            actions[3],
+            actions[3].0,
             EditAction::Write {
                 file_path: PathBuf::from("hello.py"),
-                content: "def hello():\n    \"print a greeting\"\n\n    print(\"hello\")"
-                    .to_string(),
-            }
-            .fix_lf(),
+                content: line_endings!(
+                    "def hello():\n    \"print a greeting\"\n\n    print(\"hello\")"
+                )
+                .to_string(),
+            },
         );
 
         assert_eq!(
-            actions[4],
+            actions[4].0,
             EditAction::Replace {
                 file_path: PathBuf::from("main.py"),
-                old: "def hello():\n    \"print a greeting\"\n\n    print(\"hello\")".to_string(),
+                old: line_endings!(
+                    "def hello():\n    \"print a greeting\"\n\n    print(\"hello\")"
+                )
+                .to_string(),
                 new: "from hello import hello".to_string(),
-            }
-            .fix_lf(),
+            },
         );
 
         // The system prompt includes some text that would produce errors
@@ -860,29 +865,6 @@ fn new_utils_func() {}
         );
     }
 
-    impl EditAction {
-        fn fix_lf(self: EditAction) -> EditAction {
-            #[cfg(windows)]
-            match self {
-                EditAction::Replace {
-                    file_path,
-                    old,
-                    new,
-                } => EditAction::Replace {
-                    file_path: file_path.clone(),
-                    old: old.replace("\n", "\r\n"),
-                    new: new.replace("\n", "\r\n"),
-                },
-                EditAction::Write { file_path, content } => EditAction::Write {
-                    file_path: file_path.clone(),
-                    content: content.replace("\n", "\r\n"),
-                },
-            }
-            #[cfg(not(windows))]
-            self
-        }
-    }
-
     #[test]
     fn test_print_error() {
         let input = r#"src/main.rs
@@ -904,4 +886,20 @@ fn replacement() {}
 
         assert_eq!(format!("{}", error), expected_error);
     }
+
+    // helpers
+
+    fn assert_no_errors(parser: &EditActionParser) {
+        let errors = parser.errors();
+
+        assert!(
+            errors.is_empty(),
+            "Expected no errors, but found:\n\n{}",
+            errors
+                .iter()
+                .map(|e| e.to_string())
+                .collect::<Vec<String>>()
+                .join("\n")
+        );
+    }
 }

crates/assistant_tools/src/edit_files_tool/log.rs

@@ -80,7 +80,7 @@ impl EditToolLog {
         &mut self,
         id: EditToolRequestId,
         chunk: &str,
-        new_actions: &[EditAction],
+        new_actions: &[(EditAction, String)],
         cx: &mut Context<Self>,
     ) {
         if let Some(request) = self.requests.get_mut(id.0 as usize) {
@@ -92,7 +92,9 @@ impl EditToolLog {
                     response.push_str(chunk);
                 }
             }
-            request.parsed_edits.extend(new_actions.iter().cloned());
+            request
+                .parsed_edits
+                .extend(new_actions.iter().cloned().map(|(action, _)| action));
 
             cx.emit(EditToolLogEvent::Updated);
         }

crates/assistant_tools/src/edit_files_tool/replace.rs

@@ -0,0 +1,525 @@
+use language::{BufferSnapshot, Diff, Point, ToOffset};
+use project::search::SearchQuery;
+use util::{paths::PathMatcher, ResultExt as _};
+
+/// Performs an exact string replacement in a buffer, requiring precise character-for-character matching.
+/// Uses the search functionality to locate the first occurrence of the exact string.
+/// Returns None if no exact match is found in the buffer.
+pub async fn replace_exact(old: &str, new: &str, snapshot: &BufferSnapshot) -> Option<Diff> {
+    let query = SearchQuery::text(
+        old,
+        false,
+        true,
+        true,
+        PathMatcher::new(&[]).ok()?,
+        PathMatcher::new(&[]).ok()?,
+        None,
+    )
+    .log_err()?;
+
+    let matches = query.search(&snapshot, None).await;
+
+    if matches.is_empty() {
+        return None;
+    }
+
+    let edit_range = matches[0].clone();
+    let diff = language::text_diff(&old, &new);
+
+    let edits = diff
+        .into_iter()
+        .map(|(old_range, text)| {
+            let start = edit_range.start + old_range.start;
+            let end = edit_range.start + old_range.end;
+            (start..end, text)
+        })
+        .collect::<Vec<_>>();
+
+    let diff = language::Diff {
+        base_version: snapshot.version().clone(),
+        line_ending: snapshot.line_ending(),
+        edits,
+    };
+
+    Some(diff)
+}
+
+/// Performs a replacement that's indentation-aware - matches text content ignoring leading whitespace differences.
+/// When replacing, preserves the indentation level found in the buffer at each matching line.
+/// Returns None if no match found or if indentation is offset inconsistently across matched lines.
+pub fn replace_with_flexible_indent(old: &str, new: &str, buffer: &BufferSnapshot) -> Option<Diff> {
+    let (old_lines, old_min_indent) = lines_with_min_indent(old);
+    let (new_lines, new_min_indent) = lines_with_min_indent(new);
+    let min_indent = old_min_indent.min(new_min_indent);
+
+    let old_lines = drop_lines_prefix(&old_lines, min_indent);
+    let new_lines = drop_lines_prefix(&new_lines, min_indent);
+
+    let max_row = buffer.max_point().row;
+
+    'windows: for start_row in 0..max_row.saturating_sub(old_lines.len() as u32 - 1) {
+        let mut common_leading = None;
+
+        let end_row = start_row + old_lines.len() as u32 - 1;
+
+        if end_row > max_row {
+            // The buffer ends before fully matching the pattern
+            return None;
+        }
+
+        let start_point = Point::new(start_row, 0);
+        let end_point = Point::new(end_row, buffer.line_len(end_row));
+        let range = start_point.to_offset(buffer)..end_point.to_offset(buffer);
+
+        let window_text = buffer.text_for_range(range.clone());
+        let mut window_lines = window_text.lines();
+        let mut old_lines_iter = old_lines.iter();
+
+        while let (Some(window_line), Some(old_line)) = (window_lines.next(), old_lines_iter.next())
+        {
+            let line_trimmed = window_line.trim_start();
+
+            if line_trimmed != old_line.trim_start() {
+                continue 'windows;
+            }
+
+            if line_trimmed.is_empty() {
+                continue;
+            }
+
+            let line_leading = &window_line[..window_line.len() - old_line.len()];
+
+            match &common_leading {
+                Some(common_leading) if common_leading != line_leading => {
+                    continue 'windows;
+                }
+                Some(_) => (),
+                None => common_leading = Some(line_leading.to_string()),
+            }
+        }
+
+        if let Some(common_leading) = common_leading {
+            let line_ending = buffer.line_ending();
+            let replacement = new_lines
+                .iter()
+                .map(|new_line| {
+                    if new_line.trim().is_empty() {
+                        new_line.to_string()
+                    } else {
+                        common_leading.to_string() + new_line
+                    }
+                })
+                .collect::<Vec<_>>()
+                .join(line_ending.as_str());
+
+            let diff = Diff {
+                base_version: buffer.version().clone(),
+                line_ending,
+                edits: vec![(range, replacement.into())],
+            };
+
+            return Some(diff);
+        }
+    }
+
+    None
+}
+
+fn drop_lines_prefix<'a>(lines: &'a [&str], prefix_len: usize) -> Vec<&'a str> {
+    lines
+        .iter()
+        .map(|line| line.get(prefix_len..).unwrap_or(""))
+        .collect()
+}
+
+fn lines_with_min_indent(input: &str) -> (Vec<&str>, usize) {
+    let mut lines = Vec::new();
+    let mut min_indent: Option<usize> = None;
+
+    for line in input.lines() {
+        lines.push(line);
+        if !line.trim().is_empty() {
+            let indent = line.len() - line.trim_start().len();
+            min_indent = Some(min_indent.map_or(indent, |m| m.min(indent)));
+        }
+    }
+
+    (lines, min_indent.unwrap_or(0))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use gpui::prelude::*;
+    use gpui::TestAppContext;
+    use unindent::Unindent;
+
+    #[gpui::test]
+    fn test_replace_consistent_indentation(cx: &mut TestAppContext) {
+        let whole = r#"
+            fn test() {
+                let x = 5;
+                println!("x = {}", x);
+                let y = 10;
+            }
+        "#
+        .unindent();
+
+        let old = r#"
+            let x = 5;
+            println!("x = {}", x);
+        "#
+        .unindent();
+
+        let new = r#"
+            let x = 42;
+            println!("New value: {}", x);
+        "#
+        .unindent();
+
+        let expected = r#"
+            fn test() {
+                let x = 42;
+                println!("New value: {}", x);
+                let y = 10;
+            }
+        "#
+        .unindent();
+
+        assert_eq!(
+            test_replace_with_flexible_indent(cx, &whole, &old, &new),
+            Some(expected.to_string())
+        );
+    }
+
+    #[gpui::test]
+    fn test_replace_inconsistent_indentation(cx: &mut TestAppContext) {
+        let whole = r#"
+            fn test() {
+                if condition {
+                    println!("{}", 43);
+                }
+            }
+        "#
+        .unindent();
+
+        let old = r#"
+            if condition {
+            println!("{}", 43);
+        "#
+        .unindent();
+
+        let new = r#"
+            if condition {
+            println!("{}", 42);
+        "#
+        .unindent();
+
+        assert_eq!(
+            test_replace_with_flexible_indent(cx, &whole, &old, &new),
+            None
+        );
+    }
+
+    #[gpui::test]
+    fn test_replace_with_empty_lines(cx: &mut TestAppContext) {
+        // Test with empty lines
+        let whole = r#"
+            fn test() {
+                let x = 5;
+
+                println!("x = {}", x);
+            }
+        "#
+        .unindent();
+
+        let old = r#"
+            let x = 5;
+
+            println!("x = {}", x);
+        "#
+        .unindent();
+
+        let new = r#"
+            let x = 10;
+
+            println!("New x: {}", x);
+        "#
+        .unindent();
+
+        let expected = r#"
+            fn test() {
+                let x = 10;
+
+                println!("New x: {}", x);
+            }
+        "#
+        .unindent();
+
+        assert_eq!(
+            test_replace_with_flexible_indent(cx, &whole, &old, &new),
+            Some(expected.to_string())
+        );
+    }
+
+    #[gpui::test]
+    fn test_replace_no_match(cx: &mut TestAppContext) {
+        // Test with no match
+        let whole = r#"
+            fn test() {
+                let x = 5;
+            }
+        "#
+        .unindent();
+
+        let old = r#"
+            let y = 10;
+        "#
+        .unindent();
+
+        let new = r#"
+            let y = 20;
+        "#
+        .unindent();
+
+        assert_eq!(
+            test_replace_with_flexible_indent(cx, &whole, &old, &new),
+            None
+        );
+    }
+
+    #[gpui::test]
+    fn test_replace_whole_ends_before_matching_old(cx: &mut TestAppContext) {
+        let whole = r#"
+            fn test() {
+                let x = 5;
+        "#
+        .unindent();
+
+        let old = r#"
+            let x = 5;
+            println!("x = {}", x);
+        "#
+        .unindent();
+
+        let new = r#"
+            let x = 10;
+            println!("x = {}", x);
+        "#
+        .unindent();
+
+        // Should return None because whole doesn't fully contain the old text
+        assert_eq!(
+            test_replace_with_flexible_indent(cx, &whole, &old, &new),
+            None
+        );
+    }
+
+    #[test]
+    fn test_lines_with_min_indent() {
+        // Empty string
+        assert_eq!(lines_with_min_indent(""), (vec![], 0));
+
+        // Single line without indentation
+        assert_eq!(lines_with_min_indent("hello"), (vec!["hello"], 0));
+
+        // Multiple lines with no indentation
+        assert_eq!(
+            lines_with_min_indent("line1\nline2\nline3"),
+            (vec!["line1", "line2", "line3"], 0)
+        );
+
+        // Multiple lines with consistent indentation
+        assert_eq!(
+            lines_with_min_indent("  line1\n  line2\n  line3"),
+            (vec!["  line1", "  line2", "  line3"], 2)
+        );
+
+        // Multiple lines with varying indentation
+        assert_eq!(
+            lines_with_min_indent("    line1\n  line2\n      line3"),
+            (vec!["    line1", "  line2", "      line3"], 2)
+        );
+
+        // Lines with mixed indentation and empty lines
+        assert_eq!(
+            lines_with_min_indent("    line1\n\n  line2"),
+            (vec!["    line1", "", "  line2"], 2)
+        );
+    }
+
+    #[gpui::test]
+    fn test_replace_with_missing_indent_uneven_match(cx: &mut TestAppContext) {
+        let whole = r#"
+            fn test() {
+                if true {
+                        let x = 5;
+                        println!("x = {}", x);
+                }
+            }
+        "#
+        .unindent();
+
+        let old = r#"
+            let x = 5;
+            println!("x = {}", x);
+        "#
+        .unindent();
+
+        let new = r#"
+            let x = 42;
+            println!("x = {}", x);
+        "#
+        .unindent();
+
+        let expected = r#"
+            fn test() {
+                if true {
+                        let x = 42;
+                        println!("x = {}", x);
+                }
+            }
+        "#
+        .unindent();
+
+        assert_eq!(
+            test_replace_with_flexible_indent(cx, &whole, &old, &new),
+            Some(expected.to_string())
+        );
+    }
+
+    #[gpui::test]
+    fn test_replace_big_example(cx: &mut TestAppContext) {
+        let whole = r#"
+            #[cfg(test)]
+            mod tests {
+                use super::*;
+
+                #[test]
+                fn test_is_valid_age() {
+                    assert!(is_valid_age(0));
+                    assert!(!is_valid_age(151));
+                }
+            }
+        "#
+        .unindent();
+
+        let old = r#"
+            #[test]
+            fn test_is_valid_age() {
+                assert!(is_valid_age(0));
+                assert!(!is_valid_age(151));
+            }
+        "#
+        .unindent();
+
+        let new = r#"
+            #[test]
+            fn test_is_valid_age() {
+                assert!(is_valid_age(0));
+                assert!(!is_valid_age(151));
+            }
+
+            #[test]
+            fn test_group_people_by_age() {
+                let people = vec![
+                    Person::new("Young One", 5, "young@example.com").unwrap(),
+                    Person::new("Teen One", 15, "teen@example.com").unwrap(),
+                    Person::new("Teen Two", 18, "teen2@example.com").unwrap(),
+                    Person::new("Adult One", 25, "adult@example.com").unwrap(),
+                ];
+
+                let groups = group_people_by_age(&people);
+
+                assert_eq!(groups.get(&0).unwrap().len(), 1);  // One person in 0-9
+                assert_eq!(groups.get(&10).unwrap().len(), 2); // Two people in 10-19
+                assert_eq!(groups.get(&20).unwrap().len(), 1); // One person in 20-29
+            }
+        "#
+        .unindent();
+        let expected = r#"
+            #[cfg(test)]
+            mod tests {
+                use super::*;
+
+                #[test]
+                fn test_is_valid_age() {
+                    assert!(is_valid_age(0));
+                    assert!(!is_valid_age(151));
+                }
+
+                #[test]
+                fn test_group_people_by_age() {
+                    let people = vec![
+                        Person::new("Young One", 5, "young@example.com").unwrap(),
+                        Person::new("Teen One", 15, "teen@example.com").unwrap(),
+                        Person::new("Teen Two", 18, "teen2@example.com").unwrap(),
+                        Person::new("Adult One", 25, "adult@example.com").unwrap(),
+                    ];
+
+                    let groups = group_people_by_age(&people);
+
+                    assert_eq!(groups.get(&0).unwrap().len(), 1);  // One person in 0-9
+                    assert_eq!(groups.get(&10).unwrap().len(), 2); // Two people in 10-19
+                    assert_eq!(groups.get(&20).unwrap().len(), 1); // One person in 20-29
+                }
+            }
+        "#
+        .unindent();
+        assert_eq!(
+            test_replace_with_flexible_indent(cx, &whole, &old, &new),
+            Some(expected.to_string())
+        );
+    }
+
+    #[test]
+    fn test_drop_lines_prefix() {
+        // Empty array
+        assert_eq!(drop_lines_prefix(&[], 2), Vec::<&str>::new());
+
+        // Zero prefix length
+        assert_eq!(
+            drop_lines_prefix(&["line1", "line2"], 0),
+            vec!["line1", "line2"]
+        );
+
+        // Normal prefix drop
+        assert_eq!(
+            drop_lines_prefix(&["  line1", "  line2"], 2),
+            vec!["line1", "line2"]
+        );
+
+        // Prefix longer than some lines
+        assert_eq!(drop_lines_prefix(&["  line1", "a"], 2), vec!["line1", ""]);
+
+        // Prefix longer than all lines
+        assert_eq!(drop_lines_prefix(&["a", "b"], 5), vec!["", ""]);
+
+        // Mixed length lines
+        assert_eq!(
+            drop_lines_prefix(&["    line1", "  line2", "      line3"], 2),
+            vec!["  line1", "line2", "    line3"]
+        );
+    }
+
+    fn test_replace_with_flexible_indent(
+        cx: &mut TestAppContext,
+        whole: &str,
+        old: &str,
+        new: &str,
+    ) -> Option<String> {
+        // Create a local buffer with the test content
+        let buffer = cx.new(|cx| language::Buffer::local(whole, cx));
+
+        // Get the buffer snapshot
+        let buffer_snapshot = buffer.read_with(cx, |buffer, _cx| buffer.snapshot());
+
+        // Call replace_flexible and transform the result
+        replace_with_flexible_indent(old, new, &buffer_snapshot).map(|diff| {
+            buffer.update(cx, |buffer, cx| {
+                let _ = buffer.apply_diff(diff, cx);
+                buffer.text()
+            })
+        })
+    }
+}

crates/assistant_tools/src/fetch_tool.rs

@@ -0,0 +1,160 @@
+use std::cell::RefCell;
+use std::rc::Rc;
+use std::sync::Arc;
+
+use anyhow::{anyhow, bail, Context as _, Result};
+use assistant_tool::{ActionLog, Tool};
+use futures::AsyncReadExt as _;
+use gpui::{App, AppContext as _, Entity, Task};
+use html_to_markdown::{convert_html_to_markdown, markdown, TagHandler};
+use http_client::{AsyncBody, HttpClientWithUrl};
+use language_model::LanguageModelRequestMessage;
+use project::Project;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy)]
+enum ContentType {
+    Html,
+    Plaintext,
+    Json,
+}
+
+#[derive(Debug, Serialize, Deserialize, JsonSchema)]
+pub struct FetchToolInput {
+    /// The URL to fetch.
+    url: String,
+}
+
+pub struct FetchTool {
+    http_client: Arc<HttpClientWithUrl>,
+}
+
+impl FetchTool {
+    pub fn new(http_client: Arc<HttpClientWithUrl>) -> Self {
+        Self { http_client }
+    }
+
+    async fn build_message(http_client: Arc<HttpClientWithUrl>, url: &str) -> Result<String> {
+        let mut url = url.to_owned();
+        if !url.starts_with("https://") && !url.starts_with("http://") {
+            url = format!("https://{url}");
+        }
+
+        let mut response = http_client.get(&url, AsyncBody::default(), true).await?;
+
+        let mut body = Vec::new();
+        response
+            .body_mut()
+            .read_to_end(&mut body)
+            .await
+            .context("error reading response body")?;
+
+        if response.status().is_client_error() {
+            let text = String::from_utf8_lossy(body.as_slice());
+            bail!(
+                "status error {}, response: {text:?}",
+                response.status().as_u16()
+            );
+        }
+
+        let Some(content_type) = response.headers().get("content-type") else {
+            bail!("missing Content-Type header");
+        };
+        let content_type = content_type
+            .to_str()
+            .context("invalid Content-Type header")?;
+        let content_type = match content_type {
+            "text/html" => ContentType::Html,
+            "text/plain" => ContentType::Plaintext,
+            "application/json" => ContentType::Json,
+            _ => ContentType::Html,
+        };
+
+        match content_type {
+            ContentType::Html => {
+                let mut handlers: Vec<TagHandler> = vec![
+                    Rc::new(RefCell::new(markdown::WebpageChromeRemover)),
+                    Rc::new(RefCell::new(markdown::ParagraphHandler)),
+                    Rc::new(RefCell::new(markdown::HeadingHandler)),
+                    Rc::new(RefCell::new(markdown::ListHandler)),
+                    Rc::new(RefCell::new(markdown::TableHandler::new())),
+                    Rc::new(RefCell::new(markdown::StyledTextHandler)),
+                ];
+                if url.contains("wikipedia.org") {
+                    use html_to_markdown::structure::wikipedia;
+
+                    handlers.push(Rc::new(RefCell::new(wikipedia::WikipediaChromeRemover)));
+                    handlers.push(Rc::new(RefCell::new(wikipedia::WikipediaInfoboxHandler)));
+                    handlers.push(Rc::new(
+                        RefCell::new(wikipedia::WikipediaCodeHandler::new()),
+                    ));
+                } else {
+                    handlers.push(Rc::new(RefCell::new(markdown::CodeHandler)));
+                }
+
+                convert_html_to_markdown(&body[..], &mut handlers)
+            }
+            ContentType::Plaintext => Ok(std::str::from_utf8(&body)?.to_owned()),
+            ContentType::Json => {
+                let json: serde_json::Value = serde_json::from_slice(&body)?;
+
+                Ok(format!(
+                    "```json\n{}\n```",
+                    serde_json::to_string_pretty(&json)?
+                ))
+            }
+        }
+    }
+}
+
+impl Tool for FetchTool {
+    fn name(&self) -> String {
+        "fetch".to_string()
+    }
+
+    fn description(&self) -> String {
+        include_str!("./fetch_tool/description.md").to_string()
+    }
+
+    fn input_schema(&self) -> serde_json::Value {
+        let schema = schemars::schema_for!(FetchToolInput);
+        serde_json::to_value(&schema).unwrap()
+    }
+
+    fn ui_text(&self, input: &serde_json::Value) -> String {
+        match serde_json::from_value::<FetchToolInput>(input.clone()) {
+            Ok(input) => format!("Fetch `{}`", input.url),
+            Err(_) => "Fetch URL".to_string(),
+        }
+    }
+
+    fn run(
+        self: Arc<Self>,
+        input: serde_json::Value,
+        _messages: &[LanguageModelRequestMessage],
+        _project: Entity<Project>,
+        _action_log: Entity<ActionLog>,
+        cx: &mut App,
+    ) -> Task<Result<String>> {
+        let input = match serde_json::from_value::<FetchToolInput>(input) {
+            Ok(input) => input,
+            Err(err) => return Task::ready(Err(anyhow!(err))),
+        };
+
+        let text = cx.background_spawn({
+            let http_client = self.http_client.clone();
+            let url = input.url.clone();
+            async move { Self::build_message(http_client, &url).await }
+        });
+
+        cx.foreground_executor().spawn(async move {
+            let text = text.await?;
+            if text.trim().is_empty() {
+                bail!("no textual content found");
+            }
+
+            Ok(text)
+        })
+    }
+}

crates/assistant_tools/src/fetch_tool/description.md

@@ -0,0 +1 @@
+Fetches a URL and returns the content as Markdown.