sessions - AI customizations for selfhost

.github/copilot-instructions.md

@@ -24,6 +24,7 @@ Visual Studio Code is built with a layered architecture using TypeScript, web AP
   - `workbench/api/` - Extension host and VS Code API implementation
 - `src/vs/code/` - Electron main process specific implementation
 - `src/vs/server/` - Server specific implementation
+- `src/vs/sessions/` - Agent sessions window, a dedicated workbench layer for agentic workflows (sits alongside `vs/workbench`, may import from it but not vice versa)
 
 The core architecture follows these principles:
 - **Layered architecture** - from `base`, `platform`, `editor`, to `workbench`
@@ -135,6 +136,7 @@ function f(x: number, y: string): void { }
 - Prefer regex capture groups with names over numbered capture groups.
 - If you create any temporary new files, scripts, or helper files for iteration, clean up these files by removing them at the end of the task
 - Never duplicate imports. Always reuse existing imports if they are present.
+- When removing an import, do not leave behind blank lines where the import was. Ensure the surrounding code remains compact.
 - Do not use `any` or `unknown` as the type for variables, parameters, or return values unless absolutely necessary. If they need type annotations, they should have proper types or interfaces defined.
 - When adding file watching, prefer correlated file watchers (via fileService.createWatcher) to shared ones.
 - When adding tooltips to UI elements, prefer the use of IHoverService service.

.github/hooks/hooks.json

@@ -4,7 +4,8 @@
 		"sessionStart": [
 			{
 				"type": "command",
-				"bash": "if [ -f ~/.vscode-worktree-setup ]; then nohup bash -c 'npm ci && npm run compile' > /tmp/worktree-setup-$(date +%Y-%m-%d_%H-%M-%S).log 2>&1 & fi"
+				"bash": "if [ -f ~/.vscode-worktree-setup ]; then nohup bash -c 'npm ci && npm run compile' > /tmp/worktree-setup-$(date +%Y-%m-%d_%H-%M-%S).log 2>&1 & fi",
+				"powershell": "if (Test-Path \"$env:USERPROFILE\\.vscode-worktree-setup\") { $log = \"$env:TEMP\\worktree-setup-$(Get-Date -Format 'yyyy-MM-dd_HH-mm-ss').log\"; $dir = $PWD.Path; Start-Job -ScriptBlock { param($d, $l) Set-Location $d; & { npm ci; if ($LASTEXITCODE -eq 0) { npm run compile } } *> $l } -ArgumentList $dir, $log | Out-Null }"
 			}
 		],
 		"sessionEnd": [

.github/skills/agent-sessions-layout/SKILL.md

@@ -45,28 +45,32 @@ When proposing or implementing changes, follow these rules from the spec:
 4. **New parts go in the right section** — Any new parts should be added to the horizontal branch alongside Chat Bar and Auxiliary Bar
 5. **Preserve no-op methods** — Unsupported features (zen mode, centered layout, etc.) should remain as no-ops, not throw errors
 6. **Handle pane composite lifecycle** — When hiding/showing parts, manage the associated pane composites
-7. **Use agent session parts** — New part functionality goes in the agent session part classes (`SidebarPart`, `AuxiliaryBarPart`, `PanelPart`, `ChatBarPart`), not the standard workbench parts
+7. **Use agent session parts** — New part functionality goes in the agent session part classes (`SidebarPart`, `AuxiliaryBarPart`, `PanelPart`, `ChatBarPart`, `ProjectBarPart`), not the standard workbench parts
 8. **Use separate storage keys** — Agent session parts use their own storage keys (prefixed with `workbench.agentsession.` or `workbench.chatbar.`) to avoid conflicts with regular workbench state
 9. **Use agent session menu IDs** — Actions should use `Menus.*` menu IDs (from `sessions/browser/menus.ts`), not shared `MenuId.*` constants
 
 ## 4. Key Files
 
 | File | Purpose |
 |------|---------|
-| `sessions/LAYOUT.md` | Authoritative specification |
+| `sessions/LAYOUT.md` | Authoritative layout specification |
 | `sessions/browser/workbench.ts` | Main layout implementation (`Workbench` class) |
 | `sessions/browser/menus.ts` | Agent sessions menu IDs (`Menus` export) |
 | `sessions/browser/layoutActions.ts` | Layout actions (toggle sidebar, panel, secondary sidebar) |
 | `sessions/browser/paneCompositePartService.ts` | `AgenticPaneCompositePartService` |
-| `sessions/browser/style.css` | Layout-specific styles |
-| `sessions/browser/parts/` | Agent session part implementations |
+| `sessions/browser/media/style.css` | Layout-specific styles |
+| `sessions/browser/parts/parts.ts` | `AgenticParts` enum |
 | `sessions/browser/parts/titlebarPart.ts` | Titlebar part, MainTitlebarPart, AuxiliaryTitlebarPart, TitleService |
-| `sessions/browser/parts/sidebarPart.ts` | Sidebar part (with footer) |
+| `sessions/browser/parts/sidebarPart.ts` | Sidebar part (with footer and macOS traffic light spacer) |
 | `sessions/browser/parts/chatBarPart.ts` | Chat Bar part |
-| `sessions/browser/widget/` | Agent sessions chat widget |
+| `sessions/browser/parts/auxiliaryBarPart.ts` | Auxiliary Bar part (with run script dropdown) |
+| `sessions/browser/parts/panelPart.ts` | Panel part |
+| `sessions/browser/parts/projectBarPart.ts` | Project Bar part (folder entries, icon customization) |
+| `sessions/contrib/configuration/browser/configuration.contribution.ts` | Sets `workbench.editor.useModal` to `'all'` for modal editor overlay |
 | `sessions/contrib/sessions/browser/sessionsTitleBarWidget.ts` | Title bar widget and session picker |
-| `sessions/contrib/chat/browser/runScriptAction.ts` | Run script contribution |
+| `sessions/contrib/chat/browser/runScriptAction.ts` | Run script split button for titlebar |
 | `sessions/contrib/accountMenu/browser/account.contribution.ts` | Account widget for sidebar footer |
+| `sessions/electron-browser/parts/titlebarPart.ts` | Desktop (Electron) titlebar part |
 
 ## 5. Testing Changes
 

.github/skills/sessions/SKILL.md

@@ -15,8 +15,6 @@ The `src/vs/sessions/` directory contains authoritative specification documents.
 | Layout spec | `src/vs/sessions/LAYOUT.md` | Grid structure, part positions, sizing, CSS classes, API reference |
 | AI Customizations | `src/vs/sessions/AI_CUSTOMIZATIONS.md` | AI customization editor and tree view design |
 | Chat Widget | `src/vs/sessions/browser/widget/AGENTS_CHAT_WIDGET.md` | Chat widget wrapper architecture, deferred session creation, option delivery |
-| AI Customization Mgmt | `src/vs/sessions/contrib/aiCustomizationManagement/browser/SPEC.md` | Management editor specification |
-| AI Customization Tree | `src/vs/sessions/contrib/aiCustomizationTreeView/browser/SPEC.md` | Tree view specification |
 
 If you modify the implementation, you **must** update the corresponding spec to keep it in sync. Update the Revision History table at the bottom of `LAYOUT.md` with a dated entry.
 
@@ -62,44 +60,57 @@ src/vs/sessions/
 ├── AI_CUSTOMIZATIONS.md                    # AI customization design document
 ├── sessions.common.main.ts                 # Common (browser + desktop) entry point
 ├── sessions.desktop.main.ts                # Desktop entry point (imports all contributions)
-├── common/                                 # Shared types and context keys
-│   └── contextkeys.ts                      # ChatBar context keys
+├── common/                                 # Shared types, context keys, and theme
+│   ├── categories.ts                       # Command categories
+│   ├── contextkeys.ts                      # ChatBar and welcome context keys
+│   └── theme.ts                            # Theme contributions
 ├── browser/                                # Core workbench implementation
 │   ├── workbench.ts                        # Main Workbench class (implements IWorkbenchLayoutService)
 │   ├── menus.ts                            # Agent sessions menu IDs (Menus export)
 │   ├── layoutActions.ts                    # Layout toggle actions (sidebar, panel, auxiliary bar)
 │   ├── paneCompositePartService.ts         # AgenticPaneCompositePartService
-│   ├── style.css                           # Layout-specific styles
 │   ├── widget/                             # Agent sessions chat widget
-│   │   ├── AGENTS_CHAT_WIDGET.md           # Chat widget architecture doc
-│   │   ├── agentSessionsChatWidget.ts      # Main wrapper around ChatWidget
-│   │   ├── agentSessionsChatTargetConfig.ts # Observable target state
-│   │   ├── agentSessionsTargetPickerActionItem.ts # Target picker for input toolbar
-│   │   └── media/
-│   └── parts/                              # Workbench part implementations
-│       ├── parts.ts                        # AgenticParts enum
-│       ├── titlebarPart.ts                 # Titlebar (3-section toolbar layout)
-│       ├── sidebarPart.ts                  # Sidebar (with footer for account widget)
-│       ├── chatBarPart.ts                  # Chat Bar (primary chat surface)
-│       ├── auxiliaryBarPart.ts             # Auxiliary Bar (with run script dropdown)
-│       ├── panelPart.ts                    # Panel (terminal, output, etc.)
-│       ├── projectBarPart.ts              # Project bar (folder entries)
-│       ├── agentSessionsChatInputPart.ts   # Chat input part adapter
-│       ├── agentSessionsChatWelcomePart.ts # Welcome view (mascot + target buttons + pickers)
-│       └── media/                          # Part CSS files
+│   │   └── AGENTS_CHAT_WIDGET.md           # Chat widget architecture doc
+│   ├── parts/                              # Workbench part implementations
+│   │   ├── parts.ts                        # AgenticParts enum
+│   │   ├── titlebarPart.ts                 # Titlebar (3-section toolbar layout)
+│   │   ├── sidebarPart.ts                  # Sidebar (with footer for account widget)
+│   │   ├── chatBarPart.ts                  # Chat Bar (primary chat surface)
+│   │   ├── auxiliaryBarPart.ts             # Auxiliary Bar
+│   │   ├── panelPart.ts                    # Panel (terminal, output, etc.)
+│   │   ├── projectBarPart.ts               # Project bar (folder entries)
+│   │   └── media/                          # Part CSS files
+│   └── media/                              # Layout-specific styles
 ├── electron-browser/                       # Desktop-specific entry points
 │   ├── sessions.main.ts                    # Desktop main bootstrap
 │   ├── sessions.ts                         # Electron process entry
 │   ├── sessions.html                       # Production HTML shell
-│   └── sessions-dev.html                   # Development HTML shell
+│   ├── sessions-dev.html                   # Development HTML shell
+│   ├── titleService.ts                     # Desktop title service override
+│   └── parts/
+│       └── titlebarPart.ts                 # Desktop titlebar part
+├── services/                               # Service overrides
+│   ├── configuration/browser/              # Configuration service overrides
+│   └── workspace/browser/                  # Workspace service overrides
+├── test/                                   # Unit tests
+│   └── browser/
+│       └── layoutActions.test.ts
 └── contrib/                                # Feature contributions
     ├── accountMenu/browser/                # Account widget for sidebar footer
-    ├── aiCustomizationManagement/browser/  # AI customization management editor
+    ├── agentFeedback/browser/              # Agent feedback attachments, overlays, hover
     ├── aiCustomizationTreeView/browser/    # AI customization tree view sidebar
+    ├── applyToParentRepo/browser/          # Apply changes to parent repo
     ├── changesView/browser/                # File changes view
     ├── chat/browser/                       # Chat actions (run script, branch, prompts)
     ├── configuration/browser/              # Configuration overrides
-    └── sessions/browser/                   # Sessions view, title bar widget, active session service
+    ├── files/browser/                      # File-related contributions
+    ├── fileTreeView/browser/               # File tree view (filesystem provider)
+    ├── gitSync/browser/                    # Git sync contributions
+    ├── logs/browser/                       # Log contributions
+    ├── sessions/browser/                   # Sessions view, title bar widget, active session service
+    ├── terminal/browser/                   # Terminal contributions
+    ├── welcome/browser/                    # Welcome view contribution
+    └── workspace/browser/                  # Workspace contributions
 ```
 
 ## 4. Layout
@@ -165,18 +176,21 @@ The agent sessions window uses **its own menu IDs** defined in `browser/menus.ts
 
 | Menu ID | Purpose |
 |---------|---------|
-| `Menus.TitleBarLeft` | Left toolbar (toggle sidebar) |
-| `Menus.TitleBarCenter` | Not used directly (see CommandCenter) |
-| `Menus.TitleBarRight` | Right toolbar (run script, open, toggle auxiliary bar) |
+| `Menus.ChatBarTitle` | Chat bar title actions |
 | `Menus.CommandCenter` | Center toolbar with session picker widget |
-| `Menus.TitleBarControlMenu` | Submenu intercepted to render `SessionsTitleBarWidget` |
+| `Menus.CommandCenterCenter` | Center section of command center |
+| `Menus.TitleBarContext` | Titlebar context menu |
+| `Menus.TitleBarLeftLayout` | Left layout toolbar |
+| `Menus.TitleBarSessionTitle` | Session title in titlebar |
+| `Menus.TitleBarSessionMenu` | Session menu in titlebar |
+| `Menus.TitleBarRightLayout` | Right layout toolbar |
 | `Menus.PanelTitle` | Panel title bar actions |
 | `Menus.SidebarTitle` | Sidebar title bar actions |
 | `Menus.SidebarFooter` | Sidebar footer (account widget) |
+| `Menus.SidebarCustomizations` | Sidebar customizations menu |
 | `Menus.AuxiliaryBarTitle` | Auxiliary bar title actions |
 | `Menus.AuxiliaryBarTitleLeft` | Auxiliary bar left title actions |
-| `Menus.OpenSubMenu` | "Open..." split button (Open Terminal, Open in VS Code) |
-| `Menus.ChatBarTitle` | Chat bar title actions |
+| `Menus.AgentFeedbackEditorContent` | Agent feedback editor content menu |
 
 ## 7. Context Keys
 
@@ -187,7 +201,7 @@ Defined in `common/contextkeys.ts`:
 | `activeChatBar` | `string` | ID of the active chat bar panel |
 | `chatBarFocus` | `boolean` | Whether chat bar has keyboard focus |
 | `chatBarVisible` | `boolean` | Whether chat bar is visible |
-
+| `sessionsWelcomeVisible` | `boolean` | Whether the sessions welcome overlay is visible |
 ## 8. Contributions
 
 Feature contributions live under `contrib/<featureName>/browser/` and are registered via imports in `sessions.desktop.main.ts` (desktop) or `sessions.common.main.ts` (browser-compatible).
@@ -199,13 +213,18 @@ Feature contributions live under `contrib/<featureName>/browser/` and are regist
 | **Sessions View** | `contrib/sessions/browser/` | Sessions list in sidebar, session picker, active session service |
 | **Title Bar Widget** | `contrib/sessions/browser/sessionsTitleBarWidget.ts` | Session picker in titlebar center |
 | **Account Widget** | `contrib/accountMenu/browser/` | Account button in sidebar footer |
-| **Run Script** | `contrib/chat/browser/runScriptAction.ts` | Run configured script in terminal |
-| **Branch Chat Session** | `contrib/chat/browser/branchChatSessionAction.ts` | Branch a chat session |
-| **Open in VS Code / Terminal** | `contrib/chat/browser/chat.contribution.ts` | Open worktree in VS Code or terminal |
-| **Prompts Service** | `contrib/chat/browser/promptsService.ts` | Agentic prompts service override |
+| **Chat Actions** | `contrib/chat/browser/` | Chat actions (run script, branch, prompts, customizations debug log) |
 | **Changes View** | `contrib/changesView/browser/` | File changes in auxiliary bar |
-| **AI Customization Editor** | `contrib/aiCustomizationManagement/browser/` | Management editor for prompts, hooks, MCP, etc. |
+| **Agent Feedback** | `contrib/agentFeedback/browser/` | Agent feedback attachments, editor overlays, hover |
 | **AI Customization Tree** | `contrib/aiCustomizationTreeView/browser/` | Sidebar tree for AI customizations |
+| **Apply to Parent Repo** | `contrib/applyToParentRepo/browser/` | Apply changes to parent repo |
+| **Files** | `contrib/files/browser/` | File-related contributions |
+| **File Tree View** | `contrib/fileTreeView/browser/` | File tree view (filesystem provider) |
+| **Git Sync** | `contrib/gitSync/browser/` | Git sync contributions |
+| **Logs** | `contrib/logs/browser/` | Log contributions |
+| **Terminal** | `contrib/terminal/browser/` | Terminal contributions |
+| **Welcome** | `contrib/welcome/browser/` | Welcome view contribution |
+| **Workspace** | `contrib/workspace/browser/` | Workspace contributions |
 | **Configuration** | `contrib/configuration/browser/` | Configuration overrides |
 
 ### 8.2 Service Overrides
@@ -216,6 +235,10 @@ The agent sessions window registers its own implementations for:
 - `IPromptsService` → `AgenticPromptsService` (scopes prompt discovery to active session worktree)
 - `IActiveSessionService` → `ActiveSessionService` (tracks active session)
 
+Service overrides also live under `services/`:
+- `services/configuration/browser/` - configuration service overrides
+- `services/workspace/browser/` - workspace service overrides
+
 ### 8.3 `WindowVisibility.Sessions`
 
 Views and contributions that should only appear in the agent sessions window (not in regular VS Code) use `WindowVisibility.Sessions` in their registration.
@@ -224,12 +247,14 @@ Views and contributions that should only appear in the agent sessions window (no
 
 | File | Purpose |
 |------|---------|
-| `sessions.common.main.ts` | Common entry — imports browser-compatible services, workbench contributions |
-| `sessions.desktop.main.ts` | Desktop entry — imports desktop services, electron contributions, all `contrib/` modules |
+| `sessions.common.main.ts` | Common entry; imports browser-compatible services, workbench contributions |
+| `sessions.desktop.main.ts` | Desktop entry; imports desktop services, electron contributions, all `contrib/` modules |
 | `electron-browser/sessions.main.ts` | Desktop bootstrap |
 | `electron-browser/sessions.ts` | Electron process entry |
 | `electron-browser/sessions.html` | Production HTML shell |
 | `electron-browser/sessions-dev.html` | Development HTML shell |
+| `electron-browser/titleService.ts` | Desktop title service override |
+| `electron-browser/parts/titlebarPart.ts` | Desktop titlebar part |
 
 ## 10. Development Guidelines
 
@@ -243,7 +268,13 @@ Views and contributions that should only appear in the agent sessions window (no
 6. Use agent session part classes, not standard workbench parts
 7. Mark views with `WindowVisibility.Sessions` so they only appear in this window
 
-### 10.2 Layout Changes
+### 10.2 Validating Changes
+
+1. Run `npm run compile-check-ts-native` to run a repo-wide TypeScript compilation check (including `src/vs/sessions/`). This is a fast way to catch TypeScript errors introduced by your changes.
+2. Run `npm run valid-layers-check` to verify layering rules are not violated.
+3. Run tests under `src/vs/sessions/test/` to confirm nothing is broken.
+
+### 10.3 Layout Changes
 
 1. **Read `LAYOUT.md` first** — it's the authoritative spec
 2. Use the `agent-sessions-layout` skill for detailed implementation guidance

.vscode/tasks.json

@@ -225,8 +225,7 @@
 			"windows": {
 				"command": ".\\scripts\\code.bat"
 			},
-			"problemMatcher": [],
-			"inSessions": true
+			"problemMatcher": []
 		},
 		{
 			"label": "Run Dev Sessions",
@@ -238,7 +237,6 @@
 			"args": [
 				"--sessions"
 			],
-			"inSessions": true,
 			"problemMatcher": []
 		},
 		{