feat: Add Google Gemini CLI support

README.md

@@ -1,9 +1,15 @@
 # Happy
 
-Code on the go controlling claude code from your mobile device.
+Code on the go controlling AI coding assistants from your mobile device.
 
 Free. Open source. Code anywhere.
 
+## Supported AI Assistants
+
+- **Claude Code** (Anthropic) - `happy` or `happy claude`
+- **Codex** (OpenAI) - `happy codex`
+- **Gemini CLI** (Google) - `happy gemini` ✨ NEW
+
 ## Installation
 
 ```bash
@@ -12,19 +18,31 @@ npm install -g happy-coder
 
 ## Usage
 
+### Claude Code (Default)
 ```bash
 happy
 ```
 
+### OpenAI Codex
+```bash
+happy codex
+```
+
+### Google Gemini CLI
+```bash
+happy gemini
+```
+
 This will:
-1. Start a Claude Code session
+1. Start an AI coding session
 2. Display a QR code to connect from your mobile device
-3. Allow real-time session sharing between Claude Code and your mobile app
+3. Allow real-time session sharing between the AI and your mobile app
 
 ## Commands
 
 - `happy auth` – Manage authentication
-- `happy codex` – Start Codex mode
+- `happy codex` – Start Codex mode (OpenAI)
+- `happy gemini` – Start Gemini mode (Google)
 - `happy connect` – Store AI vendor API keys in Happy cloud
 - `happy notify` – Send a push notification to your devices
 - `happy daemon` – Manage background service
@@ -34,7 +52,7 @@ This will:
 
 - `-h, --help` - Show help
 - `-v, --version` - Show version
-- `-m, --model <model>` - Claude model to use (default: sonnet)
+- `-m, --model <model>` - Model to use (e.g., sonnet, gemini-2.5-pro)
 - `-p, --permission-mode <mode>` - Permission mode: auto, default, or plan
 - `--claude-env KEY=VALUE` - Set environment variable for Claude Code (e.g., for [claude-code-router](https://github.com/musistudio/claude-code-router))
 - `--claude-arg ARG` - Pass additional argument to Claude CLI
@@ -53,7 +71,9 @@ This will:
   - Required by `eventsource-parser@3.0.5`, which is required by
   `@modelcontextprotocol/sdk`, which we used to implement permission forwarding
   to mobile app
-- Claude CLI installed & logged in (`claude` command available in PATH)
+- For Claude: Claude CLI installed & logged in (`claude` command available in PATH)
+- For Codex: OpenAI Codex CLI installed
+- For Gemini: Gemini CLI installed (`npm install -g @google/gemini-cli`) & authenticated with Google account
 
 ## License
 

src/claude/utils/startHappyServer.ts

@@ -23,7 +23,7 @@ export async function startHappyServer(client: ApiSessionClient) {
                 summary: title,
                 leafUuid: randomUUID()
             });
-            
+
             return { success: true };
         } catch (error) {
             return { success: false, error: String(error) };
@@ -48,7 +48,7 @@ export async function startHappyServer(client: ApiSessionClient) {
     }, async (args) => {
         const response = await handler(args.title);
         logger.debug('[happyMCP] Response:', response);
-        
+
         if (response.success) {
             return {
                 content: [
@@ -72,6 +72,34 @@ export async function startHappyServer(client: ApiSessionClient) {
         }
     });
 
+    // Add notify_user tool
+    mcp.registerTool('notify_user', {
+        description: 'Send a notification message to the user on their mobile device',
+        title: 'Notify User',
+        inputSchema: {
+            message: z.string().describe('The message to send to the user'),
+            level: z.enum(['info', 'warning', 'error']).optional().describe('Notification level'),
+        },
+    }, async (args) => {
+        try {
+            // Send as a session event/message
+            client.sendSessionEvent({
+                type: 'message',
+                message: `📱 [IDE Notification] ${args.level ? `[${args.level.toUpperCase()}] ` : ''}${args.message}`
+            });
+
+            return {
+                content: [{ type: 'text', text: `Notification sent to user device: "${args.message}"` }],
+                isError: false,
+            };
+        } catch (error) {
+            return {
+                content: [{ type: 'text', text: `Failed to send notification: ${String(error)}` }],
+                isError: true,
+            };
+        }
+    });
+
     const transport = new StreamableHTTPServerTransport({
         // NOTE: Returning session id here will result in claude
         // sdk spawn to fail with `Invalid Request: Server already initialized`
@@ -101,9 +129,12 @@ export async function startHappyServer(client: ApiSessionClient) {
         });
     });
 
+    // Write URL to a file so other tools can find it easily if needed, or just log it
+    // For now, we rely on the main process logging it
+
     return {
         url: baseUrl.toString(),
-        toolNames: ['change_title'],
+        toolNames: ['change_title', 'notify_user'],
         stop: () => {
             logger.debug('[happyMCP] Stopping server');
             mcp.close();

src/gemini/index.ts

@@ -0,0 +1,7 @@
+/**
+ * Gemini module exports
+ */
+
+export { runGemini, type GeminiStartOptions } from './runGemini';
+export * from './types';
+export * from './sdk';