feat: add Gemini CLI provider integration (#647)

* feat: add Gemini CLI provider for AI model execution

- Add GeminiProvider class extending CliProvider for Gemini CLI integration
- Add Gemini models (Gemini 3 Pro/Flash Preview, 2.5 Pro/Flash/Flash-Lite)
- Add gemini-models.ts with model definitions and types
- Update ModelProvider type to include 'gemini'
- Add isGeminiModel() to provider-utils.ts for model detection
- Register Gemini provider in provider-factory with priority 4
- Add Gemini setup detection routes (status, auth, deauth)
- Add GeminiCliStatus to setup store for UI state management
- Add Gemini to PROVIDER_ICON_COMPONENTS for UI icon display
- Add GEMINI_MODELS to model-display for dropdown population
- Support thinking levels: off, low, medium, high

Based on https://github.com/google-gemini/gemini-cli

* chore: update package-lock.json

* feat(ui): add Gemini provider to settings and setup wizard

- Add GeminiCliStatus component for CLI detection display
- Add GeminiSettingsTab component for global settings
- Update provider-tabs.tsx to include Gemini as 5th tab
- Update providers-setup-step.tsx with Gemini provider detection
- Add useGeminiCliStatus hook for querying CLI status
- Add getGeminiStatus, authGemini, deauthGemini to HTTP API client
- Add gemini query key for React Query
- Fix GeminiModelId type to not double-prefix model IDs

* feat(ui): add Gemini to settings sidebar navigation

- Add 'gemini-provider' to SettingsViewId type
- Add GeminiIcon and gemini-provider to navigation config
- Add gemini-provider to NAV_ID_TO_PROVIDER mapping
- Add gemini-provider case in settings-view switch
- Export GeminiSettingsTab from providers index

This fixes the missing Gemini entry in the AI Providers sidebar menu.

* feat(ui): add Gemini model configuration in settings

- Create GeminiModelConfiguration component for model selection
- Add enabledGeminiModels and geminiDefaultModel state to app-store
- Add setEnabledGeminiModels, setGeminiDefaultModel, toggleGeminiModel actions
- Update GeminiSettingsTab to show model configuration when CLI is installed
- Import GeminiModelId and getAllGeminiModelIds from types

This adds the ability to configure which Gemini models are available
in the feature modal, similar to other providers like Codex and OpenCode.

* feat(ui): add Gemini models to all model dropdowns

- Add GEMINI_MODELS to model-constants.ts for UI dropdowns
- Add Gemini to ALL_MODELS array used throughout the app
- Add GeminiIcon to PROFILE_ICONS mapping
- Fix GEMINI_MODELS in model-display.ts to use correct model IDs
- Update getModelDisplayName to handle Gemini models correctly

Gemini models now appear in all model selection dropdowns including
Model Defaults, Feature Defaults, and feature card settings.

* fix(gemini): fix CLI integration and event handling

- Fix model ID prefix handling: strip gemini- prefix in agent-service,
  add it back in buildCliArgs for CLI invocation
- Fix event normalization to match actual Gemini CLI output format:
  - type: 'init' (not 'system')
  - type: 'message' with role (not 'assistant')
  - tool_name/tool_id/parameters/output field names
- Add --sandbox false and --approval-mode yolo for faster execution
- Remove thinking level selector from UI (Gemini CLI doesn't support it)
- Update auth status to show errors properly

* test: update provider-factory tests for Gemini provider

- Add GeminiProvider import and spy mock
- Update expected provider count from 4 to 5
- Add test for GeminiProvider inclusion
- Add gemini key to checkAllProviders test

* fix(gemini): address PR review feedback

- Fix npm package name from @anthropic-ai/gemini-cli to @google/gemini-cli
- Fix comments in gemini-provider.ts to match actual CLI output format
- Convert sync fs operations to async using fs/promises

* fix(settings): add Gemini and Codex settings to sync

Add enabledGeminiModels, geminiDefaultModel, enabledCodexModels, and
codexDefaultModel to SETTINGS_FIELDS_TO_SYNC for persistence across sessions.

* fix(gemini): address additional PR review feedback

- Use 'Speed' badge for non-thinking Gemini models (consistency)
- Fix installCommand mapping in gemini-settings-tab.tsx
- Add hasEnvApiKey to GeminiCliStatus interface for API parity
- Clarify GeminiThinkingLevel comment (CLI doesn't support --thinking-level)

* fix(settings): restore Codex and Gemini settings from server

Add sanitization and restoration logic for enabledCodexModels,
codexDefaultModel, enabledGeminiModels, and geminiDefaultModel
in refreshSettingsFromServer() to match the fields in SETTINGS_FIELDS_TO_SYNC.

* feat(gemini): normalize tool names and fix workspace restrictions

- Add tool name mapping to normalize Gemini CLI tool names to standard
  names (e.g., write_todos -> TodoWrite, read_file -> Read)
- Add normalizeGeminiToolInput to convert write_todos format to TodoWrite
  format (description -> content, handle cancelled status)
- Pass --include-directories with cwd to fix workspace restriction errors
  when Gemini CLI has a different cached workspace from previous sessions

---------

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

apps/server/src/routes/setup/index.ts

@@ -24,6 +24,9 @@ import { createDeauthCursorHandler } from './routes/deauth-cursor.js';
 import { createAuthOpencodeHandler } from './routes/auth-opencode.js';
 import { createDeauthOpencodeHandler } from './routes/deauth-opencode.js';
 import { createOpencodeStatusHandler } from './routes/opencode-status.js';
+import { createGeminiStatusHandler } from './routes/gemini-status.js';
+import { createAuthGeminiHandler } from './routes/auth-gemini.js';
+import { createDeauthGeminiHandler } from './routes/deauth-gemini.js';
 import {
   createGetOpencodeModelsHandler,
   createRefreshOpencodeModelsHandler,
@@ -72,6 +75,11 @@ export function createSetupRoutes(): Router {
   router.post('/auth-opencode', createAuthOpencodeHandler());
   router.post('/deauth-opencode', createDeauthOpencodeHandler());
 
+  // Gemini CLI routes
+  router.get('/gemini-status', createGeminiStatusHandler());
+  router.post('/auth-gemini', createAuthGeminiHandler());
+  router.post('/deauth-gemini', createDeauthGeminiHandler());
+
   // OpenCode Dynamic Model Discovery routes
   router.get('/opencode/models', createGetOpencodeModelsHandler());
   router.post('/opencode/models/refresh', createRefreshOpencodeModelsHandler());

apps/server/src/routes/setup/routes/auth-gemini.ts

@@ -0,0 +1,42 @@
+/**
+ * POST /auth-gemini endpoint - Connect Gemini CLI to the app
+ */
+
+import type { Request, Response } from 'express';
+import { getErrorMessage, logError } from '../common.js';
+import * as fs from 'fs/promises';
+import * as path from 'path';
+
+const DISCONNECTED_MARKER_FILE = '.gemini-disconnected';
+
+/**
+ * Creates handler for POST /api/setup/auth-gemini
+ * Removes the disconnection marker to allow Gemini CLI to be used
+ */
+export function createAuthGeminiHandler() {
+  return async (_req: Request, res: Response): Promise<void> => {
+    try {
+      const projectRoot = process.cwd();
+      const automakerDir = path.join(projectRoot, '.automaker');
+      const markerPath = path.join(automakerDir, DISCONNECTED_MARKER_FILE);
+
+      // Remove the disconnection marker if it exists
+      try {
+        await fs.unlink(markerPath);
+      } catch {
+        // File doesn't exist, nothing to remove
+      }
+
+      res.json({
+        success: true,
+        message: 'Gemini CLI connected to app',
+      });
+    } catch (error) {
+      logError(error, 'Auth Gemini failed');
+      res.status(500).json({
+        success: false,
+        error: getErrorMessage(error),
+      });
+    }
+  };
+}

apps/server/src/routes/setup/routes/deauth-gemini.ts

@@ -0,0 +1,42 @@
+/**
+ * POST /deauth-gemini endpoint - Disconnect Gemini CLI from the app
+ */
+
+import type { Request, Response } from 'express';
+import { getErrorMessage, logError } from '../common.js';
+import * as fs from 'fs/promises';
+import * as path from 'path';
+
+const DISCONNECTED_MARKER_FILE = '.gemini-disconnected';
+
+/**
+ * Creates handler for POST /api/setup/deauth-gemini
+ * Creates a marker file to disconnect Gemini CLI from the app
+ */
+export function createDeauthGeminiHandler() {
+  return async (_req: Request, res: Response): Promise<void> => {
+    try {
+      const projectRoot = process.cwd();
+      const automakerDir = path.join(projectRoot, '.automaker');
+
+      // Ensure .automaker directory exists
+      await fs.mkdir(automakerDir, { recursive: true });
+
+      const markerPath = path.join(automakerDir, DISCONNECTED_MARKER_FILE);
+
+      // Create the disconnection marker
+      await fs.writeFile(markerPath, 'Gemini CLI disconnected from app');
+
+      res.json({
+        success: true,
+        message: 'Gemini CLI disconnected from app',
+      });
+    } catch (error) {
+      logError(error, 'Deauth Gemini failed');
+      res.status(500).json({
+        success: false,
+        error: getErrorMessage(error),
+      });
+    }
+  };
+}

apps/server/src/routes/setup/routes/gemini-status.ts

@@ -0,0 +1,79 @@
+/**
+ * GET /gemini-status endpoint - Get Gemini CLI installation and auth status
+ */
+
+import type { Request, Response } from 'express';
+import { GeminiProvider } from '../../../providers/gemini-provider.js';
+import { getErrorMessage, logError } from '../common.js';
+import * as fs from 'fs/promises';
+import * as path from 'path';
+
+const DISCONNECTED_MARKER_FILE = '.gemini-disconnected';
+
+async function isGeminiDisconnectedFromApp(): Promise<boolean> {
+  try {
+    const projectRoot = process.cwd();
+    const markerPath = path.join(projectRoot, '.automaker', DISCONNECTED_MARKER_FILE);
+    await fs.access(markerPath);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+/**
+ * Creates handler for GET /api/setup/gemini-status
+ * Returns Gemini CLI installation and authentication status
+ */
+export function createGeminiStatusHandler() {
+  const installCommand = 'npm install -g @google/gemini-cli';
+  const loginCommand = 'gemini';
+
+  return async (_req: Request, res: Response): Promise<void> => {
+    try {
+      // Check if user has manually disconnected from the app
+      if (await isGeminiDisconnectedFromApp()) {
+        res.json({
+          success: true,
+          installed: true,
+          version: null,
+          path: null,
+          auth: {
+            authenticated: false,
+            method: 'none',
+            hasApiKey: false,
+          },
+          installCommand,
+          loginCommand,
+        });
+        return;
+      }
+
+      const provider = new GeminiProvider();
+      const status = await provider.detectInstallation();
+      const auth = await provider.checkAuth();
+
+      res.json({
+        success: true,
+        installed: status.installed,
+        version: status.version || null,
+        path: status.path || null,
+        auth: {
+          authenticated: auth.authenticated,
+          method: auth.method,
+          hasApiKey: auth.hasApiKey || false,
+          hasEnvApiKey: auth.hasEnvApiKey || false,
+          error: auth.error,
+        },
+        installCommand,
+        loginCommand,
+      });
+    } catch (error) {
+      logError(error, 'Get Gemini status failed');
+      res.status(500).json({
+        success: false,
+        error: getErrorMessage(error),
+      });
+    }
+  };
+}