feat: add Google Antigravity CLI (agy) as a supported agent

README.md

@@ -45,7 +45,7 @@ Press `n` to create a new pane, type a prompt, pick one or more agents (or none
 dmux creates a tmux pane for each task. Every pane gets its own git worktree and branch so agents work in complete isolation. When a task is done, open the pane menu with `m` and choose Merge to bring it back into your main branch, or Create GitHub PR to push the branch and file a pull request.
 
 - **Worktree isolation** — each pane is a full working copy, no conflicts between agents
-- **Agent support** — Claude Code, Codex, OpenCode, Cline CLI, Gemini CLI, Qwen CLI, Amp CLI, pi CLI, Cursor CLI, Copilot CLI, and Crush CLI
+- **Agent support** — Claude Code, Codex, OpenCode, Cline CLI, Gemini CLI, Qwen CLI, Amp CLI, pi CLI, Cursor CLI, Copilot CLI, Crush CLI, and Antigravity CLI
 - **Goal launches** — optionally start supported agents in goal mode from the initial prompt
 - **Multi-select launches** — choose any combination of enabled agents per prompt
 - **AI naming** — branches and commit messages generated automatically
@@ -87,7 +87,7 @@ dmux can use default branch behavior or let you override branch details when cre
 - tmux 3.0+
 - Node.js 18+
 - Git 2.20+
-- At least one supported agent CLI (for example [Claude Code](https://docs.anthropic.com/en/docs/claude-code), [Codex](https://github.com/openai/codex), [Grok Build](https://docs.x.ai/build/overview), [OpenCode](https://github.com/opencode-ai/opencode), [Cline CLI](https://docs.cline.bot/cline-cli/getting-started), [Gemini CLI](https://github.com/google-gemini/gemini-cli), [Qwen CLI](https://github.com/QwenLM/qwen-code), [Amp CLI](https://ampcode.com/manual), [pi CLI](https://www.npmjs.com/package/@mariozechner/pi-coding-agent), [Cursor CLI](https://docs.cursor.com/en/cli/overview), [Copilot CLI](https://github.com/github/copilot-cli), [Crush CLI](https://github.com/charmbracelet/crush))
+- At least one supported agent CLI (for example [Claude Code](https://docs.anthropic.com/en/docs/claude-code), [Codex](https://github.com/openai/codex), [Grok Build](https://docs.x.ai/build/overview), [OpenCode](https://github.com/opencode-ai/opencode), [Cline CLI](https://docs.cline.bot/cline-cli/getting-started), [Gemini CLI](https://github.com/google-gemini/gemini-cli), [Qwen CLI](https://github.com/QwenLM/qwen-code), [Amp CLI](https://ampcode.com/manual), [pi CLI](https://www.npmjs.com/package/@mariozechner/pi-coding-agent), [Cursor CLI](https://docs.cursor.com/en/cli/overview), [Copilot CLI](https://github.com/github/copilot-cli), [Crush CLI](https://github.com/charmbracelet/crush), [Antigravity CLI](https://github.com/google-antigravity/antigravity-cli))
 - [OpenRouter API key](https://openrouter.ai/) (optional, for AI branch names and commit messages)
 
 ## Documentation

__tests__/agentLaunch.test.ts

@@ -34,6 +34,7 @@ describe('agent launch utils', () => {
     expect(getAgentSlugSuffix('codex')).toBe('codex');
     expect(getAgentSlugSuffix('grok')).toBe('grok-build');
     expect(getAgentSlugSuffix('gemini')).toBe('gemini');
+    expect(getAgentSlugSuffix('antigravity')).toBe('antigravity');
   });
 
   it('returns default-enabled registry agents', () => {
@@ -243,6 +244,13 @@ describe('command builders', () => {
     expect(getSendKeysReadyDelayMs('grok')).toBe(1600);
   });
 
+  it('uses Antigravity interactive prompt mode for initial prompts', () => {
+    expect(getPromptTransport('antigravity')).toBe('option');
+    expect(buildInitialPromptCommand('antigravity', '"fix it"', 'bypassPermissions')).toBe(
+      'agy --dangerously-skip-permissions --prompt-interactive "fix it"'
+    );
+  });
+
   it('builds grok resume command scoped to the current directory', () => {
     expect(buildResumeCommand('grok', 'bypassPermissions')).toBe(
       'grok --continue --always-approve'

docs/src/content/agents.js

@@ -3,7 +3,7 @@ export const meta = { title: 'Agents' };
 export function render() {
   return `
     <h1>Agents</h1>
-    <p class="lead">dmux supports 12 AI coding agents. Each agent is automatically detected if its CLI is installed and available in your PATH.</p>
+    <p class="lead">dmux supports 13 AI coding agents. Each agent is automatically detected if its CLI is installed and available in your PATH.</p>
 
     <h2>Agent Detection</h2>
     <p>dmux automatically detects installed agents by searching:</p>

src/utils/agentLaunch.ts

@@ -24,6 +24,7 @@ export const AGENT_IDS = [
   'cursor',
   'copilot',
   'crush',
+  'antigravity',
 ] as const;
 
 export type AgentName = typeof AGENT_IDS[number];
@@ -351,6 +352,30 @@ export const AGENT_REGISTRY: Readonly<Record<AgentName, AgentRegistryEntry>> = {
     },
     defaultEnabled: false,
   },
+  antigravity: {
+    id: 'antigravity',
+    name: 'Antigravity CLI',
+    shortLabel: 'ag',
+    description: 'Google Antigravity CLI',
+    slugSuffix: 'antigravity',
+    installTestCommand: 'command -v agy 2>/dev/null || which agy 2>/dev/null',
+    commonPaths: [
+      ...homePath('.antigravity/bin/agy'),
+      '/usr/local/bin/agy',
+      '/opt/homebrew/bin/agy',
+      ...homePath('.local/bin/agy'),
+      ...homePath('bin/agy'),
+      ...homePath('.npm-global/bin/agy'),
+    ],
+    promptCommand: 'agy',
+    promptTransport: 'option',
+    promptOption: '--prompt-interactive',
+    permissionFlags: {
+      bypassPermissions: '--dangerously-skip-permissions',
+    },
+    defaultEnabled: false,
+    resumeCommandTemplate: 'agy --continue{permissions}',
+  },
 };
 
 for (const agentId of AGENT_IDS) {

src/utils/paneAttentionHeuristics.ts

@@ -237,6 +237,7 @@ export function hasAgentWorkingIndicators(content: string, agent?: AgentName): b
     case 'amp':
     case 'pi':
     case 'crush':
+    case 'antigravity':
       return lines.some((line) => progressWordPattern.test(line));
     default:
       return lines.some((line) => progressWordPattern.test(line));