feat: Add GitHub Copilot SDK provider integration (#661)

* feat: add GitHub Copilot SDK provider integration

Adds comprehensive GitHub Copilot SDK provider support including:
- CopilotProvider class with CLI detection and OAuth authentication check
- Copilot models definition with GPT-4o, Claude, and o1/o3 series models
- Settings UI integration with provider tab, model configuration, and navigation
- Onboarding flow integration with Copilot setup step
- Model selector integration for all phase-specific model dropdowns
- Persistence of enabled models and default model settings via API sync
- Server route for Copilot CLI status endpoint

https://claude.ai/code/session_01D26w7ZyEzP4H6Dor3ttk9d

* chore: update package-lock.json

https://claude.ai/code/session_01D26w7ZyEzP4H6Dor3ttk9d

* refactor: rename Copilot SDK to Copilot CLI and use GitHub icon

- Update all references from "GitHub Copilot SDK" to "GitHub Copilot CLI"
- Change install command from @github/copilot-sdk to @github/copilot
- Update CopilotIcon to use official GitHub Octocat logo
- Update error codes and comments throughout codebase

Co-Authored-By: Claude <noreply@anthropic.com>

* fix: update Copilot model definitions and add dynamic model discovery

- Update COPILOT_MODEL_MAP with correct models from CLI (claude-sonnet-4.5,
  claude-haiku-4.5, claude-opus-4.5, claude-sonnet-4, gpt-5.x series, gpt-4.1,
  gemini-3-pro-preview)
- Change default Copilot model to copilot-claude-sonnet-4.5
- Add model caching methods to CopilotProvider (hasCachedModels,
  clearModelCache, refreshModels)
- Add API routes for dynamic model discovery:
  - GET /api/setup/copilot/models
  - POST /api/setup/copilot/models/refresh
  - POST /api/setup/copilot/cache/clear

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* refactor: use @github/copilot-sdk instead of direct CLI calls

- Install @github/copilot-sdk package for proper SDK integration
- Rewrite CopilotProvider to use SDK's CopilotClient API
- Use client.createSession() for session management
- Handle SDK events (assistant.message, tool.execution_*, session.idle)
- Auto-approve permissions for autonomous agent operation
- Remove incorrect CLI flags (--mode, --output-format)
- Update default model to claude-sonnet-4.5

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: add Copilot and Gemini model support to model resolver

- Import isCopilotModel and isGeminiModel from types
- Add explicit checks for copilot- and gemini- prefixed models
- Pass through Copilot/Gemini models unchanged to their providers
- Update resolver documentation to list all supported providers

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: pass working directory to Copilot SDK and reduce event noise

- Create CopilotClient per execution with correct cwd from options.cwd
- This ensures the CLI operates in the correct project directory, not the
  server's current directory
- Skip assistant.message_delta events (they create excessive noise)
- Only yield the final assistant.message event which has complete content
- Clean up client on completion and error paths

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: simplify Copilot SDK execution with sendAndWait

- Use sendAndWait() instead of manual event polling for more reliable
  execution
- Disable streaming (streaming: false) to simplify response handling
- Increase timeout to 10 minutes for agentic operations
- Still capture tool execution events for UI display
- Add more debug logging for troubleshooting
- This should fix the "invalid_request_body" error on subsequent calls

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: allow Copilot model IDs with claude-, gemini-, gpt- prefixes

Copilot's bare model IDs legitimately contain prefixes like claude-,
gemini-, gpt- because those are the actual model names from the
Copilot CLI (e.g., claude-sonnet-4.5, gemini-3-pro-preview, gpt-5.1).

The generic validateBareModelId function was incorrectly rejecting
these valid model IDs. Now we only check that the copilot- prefix
has been stripped by the ProviderFactory.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* feat: enable real-time streaming of tool events for Copilot

- Switch back to streaming mode (streaming: true) for real-time events
- Use async queue pattern to bridge SDK callbacks to async generator
- Events are now yielded as they happen, not batched at the end
- Tool calls (Read, Write, Edit, Bash, TodoWrite, etc.) show in real-time
- Better progress visibility during agentic operations

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* feat: expand Copilot tool name and input normalization

Tool name mapping additions:
- view → Read (Copilot's file viewing tool)
- create_file → Write
- replace, patch → Edit
- run_shell_command, terminal → Bash
- search_file_content → Grep
- list_directory → Ls
- google_web_search → WebSearch
- report_intent → ReportIntent (Copilot-specific planning)
- think, plan → Think, Plan

Input normalization improvements:
- Read/Write/Edit: Map file, filename, filePath → file_path
- Bash: Map cmd, script → command
- Grep: Map query, search, regex → pattern

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: convert git+ssh to git+https in package-lock.json

The @electron/node-gyp dependency was resolved with a git+ssh URL
which fails in CI environments without SSH keys. Convert to HTTPS.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: address code review feedback for Copilot SDK provider

- Add guard for non-text prompts (vision not yet supported)
- Clear runtime model cache on fetch failure
- Fix race condition in async queue error handling
- Import CopilotAuthStatus from shared types
- Fix comment mismatch for default model constant
- Add auth-copilot and deauth-copilot routes
- Extract shared tool normalization utilities
- Create base model configuration UI component
- Add comprehensive unit tests for CopilotProvider
- Replace magic strings with constants
- Add debug logging for cleanup errors

* fix: address CodeRabbit review nitpicks

- Fix test mocks to include --version check for CLI detection
- Add aria-label for accessibility on refresh button
- Ensure default model checkbox always appears checked/enabled

* fix: address CodeRabbit review feedback

- Fix test mocks by creating fresh provider instances after mock setup
- Extract COPILOT_DISCONNECTED_MARKER_FILE constant to common.ts
- Add AUTONOMOUS MODE comment explaining auto-approval of permissions
- Improve tool-normalization with union types and null guards
- Handle 'canceled' (American spelling) status in todo normalization

* refactor: extract copilot connection logic to service and fix test mocks

- Create copilot-connection-service.ts with connect/disconnect logic
- Update auth-copilot and deauth-copilot routes to use service
- Fix test mocks for CLI detection:
  - Mock fs.existsSync for CLI path validation
  - Mock which/where command for CLI path detection

---------

Co-authored-by: Claude <noreply@anthropic.com>

apps/ui/src/store/setup-store.ts

@@ -79,6 +79,22 @@ export interface GeminiCliStatus {
   error?: string;
 }
 
+// Copilot SDK Status
+export interface CopilotCliStatus {
+  installed: boolean;
+  version?: string | null;
+  path?: string | null;
+  auth?: {
+    authenticated: boolean;
+    method: string;
+    login?: string;
+    host?: string;
+  };
+  installCommand?: string;
+  loginCommand?: string;
+  error?: string;
+}
+
 // Codex Auth Method
 export type CodexAuthMethod =
   | 'api_key_env' // OPENAI_API_KEY environment variable
@@ -137,6 +153,7 @@ export type SetupStep =
   | 'codex'
   | 'opencode'
   | 'gemini'
+  | 'copilot'
   | 'github'
   | 'complete';
 
@@ -169,6 +186,9 @@ export interface SetupState {
   // Gemini CLI state
   geminiCliStatus: GeminiCliStatus | null;
 
+  // Copilot SDK state
+  copilotCliStatus: CopilotCliStatus | null;
+
   // Setup preferences
   skipClaudeSetup: boolean;
 }
@@ -206,6 +226,9 @@ export interface SetupActions {
   // Gemini CLI
   setGeminiCliStatus: (status: GeminiCliStatus | null) => void;
 
+  // Copilot SDK
+  setCopilotCliStatus: (status: CopilotCliStatus | null) => void;
+
   // Preferences
   setSkipClaudeSetup: (skip: boolean) => void;
 }
@@ -241,6 +264,8 @@ const initialState: SetupState = {
 
   geminiCliStatus: null,
 
+  copilotCliStatus: null,
+
   skipClaudeSetup: shouldSkipSetup,
 };
 
@@ -316,6 +341,9 @@ export const useSetupStore = create<SetupState & SetupActions>()((set, get) => (
   // Gemini CLI
   setGeminiCliStatus: (status) => set({ geminiCliStatus: status }),
 
+  // Copilot SDK
+  setCopilotCliStatus: (status) => set({ copilotCliStatus: status }),
+
   // Preferences
   setSkipClaudeSetup: (skip) => set({ skipClaudeSetup: skip }),
 }));