feat(cli): Antigravity run mode

Adds Antigravity as a sixth CLI backend alongside Claude Code, shell, OpenCode,
Codex and Gemini, following the existing pluggable-resolver pattern.

- `utils/antigravity-cli-resolver.ts` resolves the CLI, mirroring the other
  resolvers; `GET /api/antigravity/status` reports availability and path.
- `ANTIGRAVITY_*` joins the `ALLOWED_ENV_PREFIXES` allowlist in schemas.ts, so
  env overrides stay CLI-scoped rather than blanket-forwarded.
- Session, tmux-manager, mux-interface and types carry the new mode; secrets are
  injected via socket-scoped `tmux setenv`, never on the spawn command line, so
  the mode requires tmux with no direct PTY fallback like the other external CLIs.
- Frontend: Run-dropdown entry, agent-type option, `ag` tab badge and toolbar
  colours. `runAntigravity()` routes remote/docker cases through
  `POST /api/quick-start` and skips the local status probe for them.

Tests: test/antigravity-mode.test.ts, plus run-mode-ui and system-routes coverage.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/config/dependency-registry.ts

@@ -98,6 +98,14 @@ export const DEPENDENCY_REGISTRY: ToolDependency[] = [
     usedBy: ['Gemini sessions'],
     resolvers: [{ match: ALL, resolver: { kind: 'path', bins: ['gemini'], versionArg: '--version' } }],
   },
+  {
+    id: 'antigravity',
+    label: 'Antigravity CLI',
+    category: 'core',
+    required: false,
+    usedBy: ['Antigravity sessions'],
+    resolvers: [{ match: ALL, resolver: { kind: 'path', bins: ['agy'], versionArg: '--version' } }],
+  },
   {
     id: 'libreoffice',
     label: 'LibreOffice',

src/docker-hosts.ts

@@ -143,6 +143,7 @@ export function defaultDockerCommandForMode(mode: SessionMode): string {
     opencode: 'exec opencode',
     codex: 'exec codex',
     gemini: 'exec gemini',
+    antigravity: 'exec agy',
   };
   return commands[mode as DockerCommandMode] || commands.shell;
 }

src/mux-interface.ts

@@ -17,6 +17,7 @@ import type {
   CodexConfig,
   EffortLevel,
   GeminiConfig,
+  AntigravityConfig,
   SessionRemote,
   SessionDocker,
 } from './types.js';
@@ -74,6 +75,7 @@ export interface CreateSessionOptions {
   openCodeConfig?: OpenCodeConfig;
   codexConfig?: CodexConfig;
   geminiConfig?: GeminiConfig;
+  antigravityConfig?: AntigravityConfig;
   /** When restoring after reboot, resume a previous Claude conversation by its session ID */
   resumeSessionId?: string;
   /** Extra env vars exported before launching the CLI (e.g., CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS). Ephemeral — not written to disk. */
@@ -102,6 +104,7 @@ export interface RespawnPaneOptions {
   openCodeConfig?: OpenCodeConfig;
   codexConfig?: CodexConfig;
   geminiConfig?: GeminiConfig;
+  antigravityConfig?: AntigravityConfig;
   /** Resume a previous Claude conversation when respawning */
   resumeSessionId?: string;
   /** Extra env vars exported before launching the CLI (preserved across respawns). */

src/remote-hosts.ts

@@ -68,6 +68,7 @@ export function defaultRemoteCommandForMode(mode: SessionMode): string {
     opencode: 'exec opencode',
     codex: 'exec codex',
     gemini: 'exec gemini',
+    antigravity: 'exec agy',
   };
   return commands[mode as RemoteCommandMode] || commands.shell;
 }

src/session.ts

@@ -49,6 +49,7 @@ import {
   type CodexConfig,
   type EffortLevel,
   type GeminiConfig,
+  type AntigravityConfig,
   type SessionRemote,
   type SessionDocker,
 } from './types.js';
@@ -140,7 +141,7 @@ const NEWLINE_SPLIT_PATTERN = /\r?\n/;
 
 /** True for external-CLI run modes (non-Claude) that use their own TUI and output format. */
 export function isExternalCliMode(mode: SessionMode): boolean {
-  return mode === 'opencode' || mode === 'codex' || mode === 'gemini';
+  return mode === 'opencode' || mode === 'codex' || mode === 'gemini' || mode === 'antigravity';
 }
 
 function getModeLabel(mode: SessionMode): string {
@@ -151,6 +152,8 @@ function getModeLabel(mode: SessionMode): string {
       return 'Codex';
     case 'gemini':
       return 'Gemini';
+    case 'antigravity':
+      return 'Antigravity';
     case 'shell':
       return 'Shell';
     case 'claude':
@@ -403,6 +406,8 @@ export class Session extends EventEmitter {
   private _codexConfig: CodexConfig | undefined;
   // Gemini configuration (only for mode === 'gemini')
   private _geminiConfig: GeminiConfig | undefined;
+  // Antigravity configuration (only for mode === 'antigravity')
+  private _antigravityConfig: AntigravityConfig | undefined;
   private _resumeSessionId: string | undefined;
 
   // Ephemeral env overrides (e.g., CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS). Exported by tmux
@@ -489,6 +494,8 @@ export class Session extends EventEmitter {
       codexConfig?: CodexConfig;
       /** Gemini configuration (only for mode === 'gemini') */
       geminiConfig?: GeminiConfig;
+      /** Antigravity configuration (only for mode === 'antigravity') */
+      antigravityConfig?: AntigravityConfig;
       /** Resume a previous Claude conversation (used after server reboot) */
       resumeSessionId?: string;
       /** Extra env vars exported to the CLI at spawn time (no disk persistence) */
@@ -562,6 +569,11 @@ export class Session extends EventEmitter {
       this._geminiConfig = config.geminiConfig;
     }
 
+    // Apply Antigravity configuration
+    if (config.antigravityConfig) {
+      this._antigravityConfig = config.antigravityConfig;
+    }
+
     // Apply env overrides (exported at spawn, not persisted to disk).
     // Legacy migration: pre-0.7.2 carried effort as the CLAUDE_CODE_EFFORT_LEVEL env var,
     // which hard-locks /effort switching. Extract it into _effort (--settings soft default)
@@ -1111,6 +1123,7 @@ export class Session extends EventEmitter {
       openCodeConfig: this._openCodeConfig,
       codexConfig: this._codexConfig,
       geminiConfig: this._geminiConfig,
+      antigravityConfig: this._antigravityConfig,
       resumeSessionId: this._resumeSessionId,
       effort: this._effort,
       // COD-118: runtime-only — surfaced so the frontend can require explicit user
@@ -1276,9 +1289,9 @@ export class Session extends EventEmitter {
         cols: ptyCols,
         rows: ptyRows,
         cwd: resolveMuxAttachCwd(this.workingDir, this._remote, this._docker),
-        // COD-75: codex/gemini get COLORTERM=truecolor — mirrors buildEnvExports()
+        // COD-75: codex/gemini/antigravity get COLORTERM=truecolor — mirrors buildEnvExports()
         // in tmux-manager.ts so the attach client and the tmux session agree.
-        env: buildMuxAttachEnv(this.mode === 'codex' || this.mode === 'gemini'),
+        env: buildMuxAttachEnv(this.mode === 'codex' || this.mode === 'gemini' || this.mode === 'antigravity'),
       });
     } catch (spawnErr) {
       console.error(`[Session] Failed to spawn PTY for ${options.spawnErrLabel}:`, spawnErr);
@@ -1343,6 +1356,7 @@ export class Session extends EventEmitter {
       openCodeConfig: this._openCodeConfig,
       codexConfig: this._codexConfig,
       geminiConfig: this._geminiConfig,
+      antigravityConfig: this._antigravityConfig,
       resumeSessionId: this._resumeSessionId,
       envOverrides: this._envOverrides,
       effort: this._effort,
@@ -1515,6 +1529,7 @@ export class Session extends EventEmitter {
             openCodeConfig: this._openCodeConfig,
             codexConfig: this._codexConfig,
             geminiConfig: this._geminiConfig,
+            antigravityConfig: this._antigravityConfig,
             resumeSessionId: this._resumeSessionId,
             envOverrides: this._envOverrides,
             effort: this._effort,
@@ -1596,6 +1611,10 @@ export class Session extends EventEmitter {
       if (this.mode === 'gemini') {
         throw new Error('Gemini sessions require tmux. Direct PTY fallback is not supported.');
       }
+      // Antigravity sessions require tmux for env override injection via setenv
+      if (this.mode === 'antigravity') {
+        throw new Error('Antigravity sessions require tmux. Direct PTY fallback is not supported.');
+      }
       try {
         // Pass --session-id to use the SAME ID as the Codeman session
         // This ensures subagents can be directly matched to the correct tab

src/tmux-manager.ts

@@ -43,6 +43,7 @@ import {
   type CodexConfig,
   type EffortLevel,
   type GeminiConfig,
+  type AntigravityConfig,
   type SessionRemote,
   type SessionDocker,
   type DockerCommandMode,
@@ -69,6 +70,7 @@ import {
   resolveOpenCodeDir,
   resolveCodexDir,
   resolveGeminiDir,
+  resolveAntigravityDir,
 } from './utils/index.js';
 import type {
   TerminalMultiplexer,
@@ -682,6 +684,34 @@ function buildGeminiCommand(config?: GeminiConfig): string {
   return parts.join(' ');
 }
 
+/**
+ * Build the Antigravity CLI (agy) command with appropriate flags.
+ *
+ * Unlike gemini's yolo default, `--dangerously-skip-permissions` is only added
+ * when the config explicitly asks for it (the frontend sends it for parity with
+ * Codeman's Claude default; the multi-user clamp strips it for non-granted owners,
+ * and an ABSENT config stays at agy's own prompting default — safe like Codex).
+ */
+function buildAntigravityCommand(config?: AntigravityConfig): string {
+  const parts = ['agy'];
+
+  if (config?.dangerouslySkipPermissions) {
+    parts.push('--dangerously-skip-permissions');
+  }
+
+  if (config?.model) {
+    const safeModel = /^[a-zA-Z0-9._\-/]+$/.test(config.model) ? config.model : undefined;
+    if (safeModel) parts.push('--model', safeModel);
+  }
+
+  if (config?.resumeConversationId) {
+    const safeId = /^[a-zA-Z0-9._-]+$/.test(config.resumeConversationId) ? config.resumeConversationId : undefined;
+    if (safeId) parts.push('--conversation', safeId);
+  }
+
+  return parts.join(' ');
+}
+
 /**
  * Build the spawn command for any session mode.
  * Shared by createSession() and respawnPane() to avoid duplication.
@@ -709,6 +739,7 @@ export function buildSpawnCommand(options: {
   openCodeConfig?: OpenCodeConfig;
   codexConfig?: CodexConfig;
   geminiConfig?: GeminiConfig;
+  antigravityConfig?: AntigravityConfig;
   resumeSessionId?: string;
   effort?: EffortLevel;
 }): string {
@@ -739,6 +770,9 @@ export function buildSpawnCommand(options: {
   if (options.mode === 'gemini') {
     return buildGeminiCommand(options.geminiConfig);
   }
+  if (options.mode === 'antigravity') {
+    return buildAntigravityCommand(options.antigravityConfig);
+  }
   return '$SHELL';
 }
 
@@ -917,6 +951,8 @@ function appendResumeFlag(modeCommand: string, mode: SessionMode, resumeId: stri
       return `${modeCommand} --resume ${resumeId}`;
     case 'codex':
       return `${modeCommand} resume ${resumeId}`;
+    case 'antigravity':
+      return `${modeCommand} --conversation ${resumeId}`;
     default:
       return modeCommand; // shell / opencode: no resume
   }
@@ -1485,8 +1521,10 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
     const exports = [
       'export LANG=en_US.UTF-8',
       'export LC_ALL=en_US.UTF-8',
-      mode === 'codex' || mode === 'gemini' ? 'export COLORTERM=truecolor' : 'unset COLORTERM',
-      ...(mode === 'codex' || mode === 'gemini' ? ['unset NO_COLOR'] : []),
+      mode === 'codex' || mode === 'gemini' || mode === 'antigravity'
+        ? 'export COLORTERM=truecolor'
+        : 'unset COLORTERM',
+      ...(mode === 'codex' || mode === 'gemini' || mode === 'antigravity' ? ['unset NO_COLOR'] : []),
       // Stamp each Codex pane with a unique originator so the response-viewer
       // can locate THIS pane's rollout exactly — codex writes the value into
       // session_meta.originator of every rollout it creates. Without it,
@@ -1569,6 +1607,10 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       const dir = resolveGeminiDir();
       return { pathExport: dir ? `export PATH="${dir}:$PATH" && ` : '', dir };
     }
+    if (mode === 'antigravity') {
+      const dir = resolveAntigravityDir();
+      return { pathExport: dir ? `export PATH="${dir}:$PATH" && ` : '', dir };
+    }
     return { pathExport: '', dir: null };
   }
 
@@ -1616,6 +1658,7 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       openCodeConfig,
       codexConfig,
       geminiConfig,
+      antigravityConfig,
       resumeSessionId,
       envOverrides,
       effort,
@@ -1667,6 +1710,11 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
     if (mode === 'gemini' && !cliDir) {
       throw new Error('Gemini CLI not found. Install with: npm install -g @google/gemini-cli');
     }
+    if (mode === 'antigravity' && !cliDir) {
+      throw new Error(
+        'Antigravity CLI not found. Install with: curl -fsSL https://antigravity.google/cli/install.sh | bash'
+      );
+    }
 
     const envExportsStr = this.buildEnvExports(sessionId, muxName, mode).join(' && ');
 
@@ -1679,6 +1727,7 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       openCodeConfig,
       codexConfig,
       geminiConfig,
+      antigravityConfig,
       resumeSessionId,
       effort,
     });
@@ -1901,6 +1950,7 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       openCodeConfig,
       codexConfig,
       geminiConfig,
+      antigravityConfig,
       resumeSessionId,
       envOverrides,
       effort,
@@ -1938,6 +1988,7 @@ export class TmuxManager extends EventEmitter implements TerminalMultiplexer {
       openCodeConfig,
       codexConfig,
       geminiConfig,
+      antigravityConfig,
       resumeSessionId,
       effort,
     });

src/types/session.ts

@@ -8,12 +8,13 @@
  * - SessionConfig — creation-time config (id, workingDir, createdAt)
  * - SessionOutput — captured stdout/stderr/exitCode
  * - SessionStatus — 'idle' | 'busy' | 'stopped' | 'error'
- * - SessionMode — 'claude' | 'shell' | 'opencode' | 'codex' | 'gemini' (which CLI backend)
+ * - SessionMode — 'claude' | 'shell' | 'opencode' | 'codex' | 'gemini' | 'antigravity' (which CLI backend)
  * - ClaudeMode — CLI permission mode ('dangerously-skip-permissions' | 'auto' | 'normal' | 'allowedTools')
  * - SessionColor — visual differentiation color
  * - OpenCodeConfig — OpenCode-specific settings (model, autoAllowTools, continueSession)
  * - CodexConfig — Codex (OpenAI CLI)-specific settings (model, resumeSessionId)
  * - GeminiConfig — Gemini CLI-specific settings (model, approvalMode, resumeSession)
+ * - AntigravityConfig — Antigravity CLI (agy) settings (model, dangerouslySkipPermissions, resumeConversationId)
  *
  * Cross-domain relationships:
  * - SessionState.respawnConfig embeds RespawnConfig (respawn domain)
@@ -42,9 +43,12 @@ export type SessionStatus = 'idle' | 'busy' | 'stopped' | 'error';
 export type ClaudeMode = 'dangerously-skip-permissions' | 'auto' | 'normal' | 'allowedTools';
 
 /** Session mode: which CLI backend a session runs */
-export type SessionMode = 'claude' | 'shell' | 'opencode' | 'codex' | 'gemini';
+export type SessionMode = 'claude' | 'shell' | 'opencode' | 'codex' | 'gemini' | 'antigravity';
 
-export type RemoteCommandMode = Extract<SessionMode, 'shell' | 'claude' | 'opencode' | 'codex' | 'gemini'>;
+export type RemoteCommandMode = Extract<
+  SessionMode,
+  'shell' | 'claude' | 'opencode' | 'codex' | 'gemini' | 'antigravity'
+>;
 
 /**
  * Advanced SSH connection options shared by RemoteHost and SessionRemote.
@@ -150,7 +154,10 @@ export interface RemoteSessionInfo {
 // into the same long-lived container. See `docs/docker-cases-plan.md`.
 
 /** Which CLI backends a Docker case can run (same set as remote). */
-export type DockerCommandMode = Extract<SessionMode, 'shell' | 'claude' | 'opencode' | 'codex' | 'gemini'>;
+export type DockerCommandMode = Extract<
+  SessionMode,
+  'shell' | 'claude' | 'opencode' | 'codex' | 'gemini' | 'antigravity'
+>;
 
 /** Container engine. Docker and Podman differ in the uid/userns + host-gateway alias. */
 export type DockerEngine = 'docker' | 'podman';
@@ -312,6 +319,16 @@ export interface GeminiConfig {
   resumeSession?: string;
 }
 
+/** Antigravity CLI (agy) session configuration */
+export interface AntigravityConfig {
+  /** Model identifier. Passed via --model. */
+  model?: string;
+  /** Auto-approve all tool permission requests (passes --dangerously-skip-permissions). Absent = agy's default prompting. */
+  dangerouslySkipPermissions?: boolean;
+  /** Resume a previous conversation by ID (passed via --conversation). */
+  resumeConversationId?: string;
+}
+
 /**
  * Configuration for creating a new session
  */
@@ -453,6 +470,8 @@ export interface SessionState {
   codexConfig?: CodexConfig;
   /** Gemini-specific configuration (only for mode === 'gemini') */
   geminiConfig?: GeminiConfig;
+  /** Antigravity-specific configuration (only for mode === 'antigravity') */
+  antigravityConfig?: AntigravityConfig;
   /** Claude conversation session ID to resume after reboot (set by restore script) */
   resumeSessionId?: string;
   /** Claude CLI effort level (soft default via --settings, switchable in-session via /effort) */

src/utils/antigravity-cli-resolver.ts

@@ -0,0 +1,65 @@
+/**
+ * @fileoverview Resolve the Antigravity CLI (`agy`) binary across common install paths.
+ *
+ * Mirrors gemini-cli-resolver.ts. Google's installer (antigravity.google/cli/install.sh)
+ * places the binary at ~/.local/bin/agy; the other locations cover manual installs.
+ *
+ * @module utils/antigravity-cli-resolver
+ */
+
+import { execSync } from 'node:child_process';
+import { existsSync } from 'node:fs';
+import { dirname, join } from 'node:path';
+import { homedir } from 'node:os';
+import { EXEC_TIMEOUT_MS } from '../config/exec-timeout.js';
+
+/** Common directories where the Antigravity CLI binary may be installed */
+const ANTIGRAVITY_SEARCH_DIRS = [
+  join(homedir(), '.local', 'bin'),
+  join(homedir(), '.antigravity', 'bin'),
+  '/usr/local/bin',
+  join(homedir(), 'bin'),
+];
+
+/** Cached directory containing the agy binary (empty string = searched but not found) */
+let _antigravityDir: string | null = null;
+
+/**
+ * Finds the directory containing the `agy` binary.
+ * Checks `which agy` first, then falls back to common install locations.
+ *
+ * @returns Directory path, or null if not found
+ */
+export function resolveAntigravityDir(): string | null {
+  if (_antigravityDir !== null) return _antigravityDir || null;
+
+  try {
+    const result = execSync('which agy', {
+      encoding: 'utf-8',
+      timeout: EXEC_TIMEOUT_MS,
+    }).trim();
+    if (result && existsSync(result)) {
+      _antigravityDir = dirname(result);
+      return _antigravityDir;
+    }
+  } catch {
+    // agy not in PATH, will check common locations
+  }
+
+  for (const dir of ANTIGRAVITY_SEARCH_DIRS) {
+    if (existsSync(join(dir, 'agy'))) {
+      _antigravityDir = dir;
+      return _antigravityDir;
+    }
+  }
+
+  _antigravityDir = '';
+  return null;
+}
+
+/**
+ * Check if the Antigravity CLI is available on the system.
+ */
+export function isAntigravityAvailable(): boolean {
+  return resolveAntigravityDir() !== null;
+}

src/utils/index.ts

@@ -30,3 +30,4 @@ export { findClaudeDir, getAugmentedPath, getClaudeCliVersion } from './claude-c
 export { resolveOpenCodeDir } from './opencode-cli-resolver.js';
 export { resolveCodexDir, isCodexAvailable } from './codex-cli-resolver.js';
 export { resolveGeminiDir, isGeminiAvailable } from './gemini-cli-resolver.js';
+export { resolveAntigravityDir, isAntigravityAvailable } from './antigravity-cli-resolver.js';

src/web/public/app.js

@@ -1984,7 +1984,7 @@ class CodemanApp {
       // Render conversation thread
       const mode = this.sessions.get(this.activeSessionId)?.mode;
       const agentLabel =
-        mode === 'codex' ? 'Codex' : mode === 'gemini' ? 'Gemini' : mode === 'opencode' ? 'OpenCode' : 'Claude';
+        mode === 'codex' ? 'Codex' : mode === 'gemini' ? 'Gemini' : mode === 'antigravity' ? 'Antigravity' : mode === 'opencode' ? 'OpenCode' : 'Claude';
       body.innerHTML = '';
       for (const msg of messages) {
         const div = document.createElement('div');
@@ -3545,7 +3545,7 @@ class CodemanApp {
           <span class="tab-status ${status}" aria-hidden="true"></span>
           <span class="tab-info">
             <span class="tab-name-row">
-              ${mode === 'shell' ? '<span class="tab-mode shell" aria-hidden="true">sh</span>' : mode === 'opencode' ? '<span class="tab-mode opencode" aria-hidden="true">oc</span>' : mode === 'codex' ? '<span class="tab-mode codex" aria-hidden="true">cx</span>' : mode === 'gemini' ? '<span class="tab-mode gemini" aria-hidden="true">gm</span>' : ''}
+              ${mode === 'shell' ? '<span class="tab-mode shell" aria-hidden="true">sh</span>' : mode === 'opencode' ? '<span class="tab-mode opencode" aria-hidden="true">oc</span>' : mode === 'codex' ? '<span class="tab-mode codex" aria-hidden="true">cx</span>' : mode === 'gemini' ? '<span class="tab-mode gemini" aria-hidden="true">gm</span>' : mode === 'antigravity' ? '<span class="tab-mode antigravity" aria-hidden="true">ag</span>' : ''}
               <span class="tab-name" data-session-id="${id}">${(() => { const p = parseSessionPrefix(name); return p && p.suffix ? '<span class="tab-prefix">' + escapeHtml(p.prefix) + '</span><span class="tab-suffix">: ' + escapeHtml(p.suffix) + '</span>' : escapeHtml(name); })()}</span>
               <span class="tab-detached-badge" aria-hidden="true">detached</span>
             </span>
@@ -4630,7 +4630,9 @@ class CodemanApp {
           ? 'Kill Tmux & Codex'
           : session.mode === 'gemini'
             ? 'Kill Tmux & Gemini'
-            : 'Kill Tmux & Claude Code';
+            : session.mode === 'antigravity'
+              ? 'Kill Tmux & Antigravity'
+              : 'Kill Tmux & Claude Code';
     }
 
     document.getElementById('closeConfirmModal').classList.add('active');

src/web/public/i18n.js

@@ -103,6 +103,7 @@
     'Run Claude Code': '运行 Claude Code',
     'Run OpenCode': '运行 OpenCode',
     'Run Gemini': '运行 Gemini',
+    'Run Antigravity': '运行 Antigravity',
     'Run Shell': '运行 Shell',
     'Select AI backend': '选择 AI 后端',
     'Create New Case': '新建案例',

src/web/public/index.html

@@ -464,6 +464,9 @@
               <button class="run-mode-option" data-mode="gemini" onclick="app.setRunMode('gemini')">
                 <span class="run-mode-dot gemini"></span>Gemini
               </button>
+              <button class="run-mode-option" data-mode="antigravity" onclick="app.setRunMode('antigravity')">
+                <span class="run-mode-dot antigravity"></span>Antigravity
+              </button>
               <div class="run-mode-sep"></div>
               <button class="run-mode-option" data-mode="shell" onclick="app.setRunMode('shell')">
                 <span class="run-mode-dot shell"></span>Terminal / Shell
@@ -733,6 +736,7 @@
                 <option value="opencode">OpenCode</option>
                 <option value="codex">Codex</option>
                 <option value="gemini">Gemini</option>
+                <option value="antigravity">Antigravity</option>
               </select>
             </div>
             <div class="form-row"><label>Working Directory</label><input type="text" id="schWorkingDir" placeholder="/absolute/path"></div>

src/web/public/mobile.css

@@ -839,6 +839,20 @@ html.mobile-init .file-browser-panel {
     border-color: rgba(96, 165, 250, 0.5);
   }
 
+  /* Antigravity mode colors on mobile */
+  .btn-toolbar.btn-run.mode-antigravity,
+  .btn-toolbar.btn-run-gear.mode-antigravity {
+    background: #0b2b33;
+    border-color: rgba(34, 211, 238, 0.3);
+    color: #cffafe;
+  }
+
+  .btn-toolbar.btn-run.mode-antigravity:active,
+  .btn-toolbar.btn-run-gear.mode-antigravity:active {
+    background: #0e7490;
+    border-color: rgba(34, 211, 238, 0.5);
+  }
+
   /* Run mode dropdown menu — positioned above toolbar on mobile */
   .run-mode-menu {
     bottom: 100%;
@@ -2286,6 +2300,12 @@ html:is([data-skin="paper-gray"], [data-skin="solarized-light"], [data-skin="cat
   color: #ffffff;
 }
 
+html:is([data-skin="paper-gray"], [data-skin="solarized-light"], [data-skin="catppuccin-latte"], [data-skin="rose-pine-dawn"]) :is(.btn-toolbar.btn-run.mode-antigravity, .btn-toolbar.btn-run-gear.mode-antigravity) {
+  background: linear-gradient(135deg, #0e7490, #0891b2);
+  border-color: #155e75;
+  color: #ffffff;
+}
+
 html:is([data-skin="paper-gray"], [data-skin="solarized-light"], [data-skin="catppuccin-latte"], [data-skin="rose-pine-dawn"]) .btn-toolbar.btn-run-gear {
   border-left-color: var(--control-border-hover) !important;
 }

src/web/public/panels-ui.js

@@ -426,7 +426,7 @@ Object.assign(CodemanApp.prototype, {
 
   _buildCommandPaletteNewSessionItem(query = '') {
     const mode = this.runMode || this._runMode || 'claude';
-    const labels = { claude: 'Claude', opencode: 'OpenCode', codex: 'Codex', gemini: 'Gemini' };
+    const labels = { claude: 'Claude', opencode: 'OpenCode', codex: 'Codex', gemini: 'Gemini', antigravity: 'Antigravity' };
     const caseName = this._findCommandPaletteCaseMatch(query) || document.getElementById('quickStartCase')?.value || 'testcase';
     return {
       id: 'new-session',

src/web/public/session-ui.js

@@ -370,7 +370,7 @@ Object.assign(CodemanApp.prototype, {
     this._renderSessionTabsImmediate?.();
   },
 
-  /** Run using the selected mode (Claude Code, OpenCode, Codex, or Gemini) */
+  /** Run using the selected mode (Claude Code, OpenCode, Codex, Gemini, or Antigravity) */
   async run() {
     if (this._runInFlight) return;
 
@@ -394,6 +394,9 @@ Object.assign(CodemanApp.prototype, {
       if (mode === 'gemini') {
         return await this.runGemini();
       }
+      if (mode === 'antigravity') {
+        return await this.runAntigravity();
+      }
       if (mode === 'shell') {
         return await this.runShell();
       }
@@ -503,7 +506,7 @@ Object.assign(CodemanApp.prototype, {
       gearBtn.className = `btn-toolbar btn-run-gear mode-${mode}`;
     }
     if (label) {
-      label.textContent = mode === 'opencode' ? 'Run OC' : mode === 'codex' ? 'Run CX' : mode === 'gemini' ? 'Run GM' : mode === 'shell' ? 'Run SH' : 'Run';
+      label.textContent = mode === 'opencode' ? 'Run OC' : mode === 'codex' ? 'Run CX' : mode === 'gemini' ? 'Run GM' : mode === 'antigravity' ? 'Run AG' : mode === 'shell' ? 'Run SH' : 'Run';
     }
   },
 
@@ -1076,6 +1079,57 @@ Object.assign(CodemanApp.prototype, {
     }
   },
 
+  async runAntigravity() {
+    const caseName = document.getElementById('quickStartCase').value || 'testcase';
+    // Remote/docker cases run agy on the OTHER side — skip the local status probe and the
+    // local-only config/env below (quick-start rejects them for remote cases).
+    const _runLoc = (this.cases || []).find(c => c.name === caseName)?.location;
+    const isRemote = _runLoc === 'remote' || _runLoc === 'docker';
+
+    this.terminal.clear();
+    this.terminal.writeln(`\x1b[1;32m Starting Antigravity session in ${caseName}...\x1b[0m`);
+    this.terminal.writeln('');
+    this.terminal.focus();
+
+    try {
+      if (!isRemote) {
+        const statusRes = await fetch('/api/antigravity/status');
+        const status = (await statusRes.json()).data;
+        if (!status.available) {
+          this.terminal.writeln('\x1b[1;31m Antigravity CLI not found.\x1b[0m');
+          this.terminal.writeln('\x1b[90m Install with: curl -fsSL https://antigravity.google/cli/install.sh | bash\x1b[0m');
+          return;
+        }
+      }
+
+      const envOverrides = this.buildEnvOverrides(this.getCaseSettings(caseName), this.loadAppSettingsFromStorage());
+      const res = await fetch('/api/quick-start', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          caseName,
+          mode: 'antigravity',
+          sessionName: `w${this._nextCaseSessionStartNumber(caseName)}-${caseName}`,
+          ...(isRemote ? {} : {
+            antigravityConfig: { dangerouslySkipPermissions: true },
+            ...(Object.keys(envOverrides).length > 0 ? { envOverrides } : {}),
+          }),
+        })
+      });
+      const data = await res.json();
+      if (!data.success) throw new Error(data.error || 'Failed to start Antigravity');
+      await this._ensureCreatedSessionVisible(data.data.sessionId, data.data.session);
+
+      if (data.data.sessionId) {
+        await this.selectSession(data.data.sessionId);
+      }
+
+      this.terminal.focus();
+    } catch (err) {
+      this.terminal.writeln(`\x1b[1;31m Error: ${err.message}\x1b[0m`);
+    }
+  },
+
 
   // ═══════════════════════════════════════════════════════════════
   // Session Options Modal
@@ -1088,7 +1142,7 @@ Object.assign(CodemanApp.prototype, {
     this.editingSessionId = sessionId;
 
     // Reset to an appropriate tab — Summary for external CLIs (Respawn/Ralph are Claude-only)
-    const isAltMode = session.mode === 'opencode' || session.mode === 'codex' || session.mode === 'gemini';
+    const isAltMode = session.mode === 'opencode' || session.mode === 'codex' || session.mode === 'gemini' || session.mode === 'antigravity';
     this.switchOptionsTab(isAltMode ? 'summary' : 'respawn');
 
     // Update respawn status display and buttons
@@ -1118,7 +1172,7 @@ Object.assign(CodemanApp.prototype, {
     }
 
     // Hide Claude-specific options for external CLI sessions
-    const isExternalCli = session.mode === 'opencode' || session.mode === 'codex' || session.mode === 'gemini';
+    const isExternalCli = session.mode === 'opencode' || session.mode === 'codex' || session.mode === 'gemini' || session.mode === 'antigravity';
     const claudeOnlyEls = document.querySelectorAll('[data-claude-only]');
     claudeOnlyEls.forEach(el => { el.style.display = isExternalCli ? 'none' : ''; });
 
@@ -2538,6 +2592,8 @@ Object.defineProperty(CodemanApp.prototype, 'runMode', {
   },
   set(mode) {
     this._runMode =
-      mode === 'opencode' || mode === 'codex' || mode === 'gemini' || mode === 'claude' ? mode : 'claude';
+      mode === 'opencode' || mode === 'codex' || mode === 'gemini' || mode === 'antigravity' || mode === 'claude'
+        ? mode
+        : 'claude';
   },
 });

src/web/public/styles.css

@@ -328,7 +328,8 @@ html:is([data-skin="paper-gray"], [data-skin="solarized-light"], [data-skin="cat
   .search-filter-chip.active,
   .search-badge-session,
   .history-view-all-btn,
-  .session-tab .tab-mode.gemini
+  .session-tab .tab-mode.gemini,
+  .session-tab .tab-mode.antigravity
 ) {
   color: var(--accent-d);
 }
@@ -2115,6 +2116,11 @@ body.solo-mode .btn-lifecycle-log {
   color: #8ab4f8;
 }
 
+.session-tab .tab-mode.antigravity {
+  background: rgba(34, 211, 238, 0.2);
+  color: #22d3ee;
+}
+
 /* Timer Banner - Compact */
 .timer-banner {
   display: flex;
@@ -4199,6 +4205,22 @@ body.touch-device .terminal-container .xterm .xterm-helper-textarea {
   color: #eff6ff;
 }
 
+/* Antigravity mode colors */
+.btn-toolbar.btn-run.mode-antigravity,
+.btn-toolbar.btn-run-gear.mode-antigravity {
+  background: linear-gradient(135deg, #0b2b33 0%, #0e7490 55%, #0891b2 100%);
+  border-color: rgba(34, 211, 238, 0.5);
+  color: #cffafe;
+  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.06);
+}
+.btn-toolbar.btn-run.mode-antigravity:hover,
+.btn-toolbar.btn-run-gear.mode-antigravity:hover {
+  background: linear-gradient(135deg, #124450 0%, #0891b2 55%, #06b6d4 100%);
+  box-shadow: 0 0 12px rgba(34, 211, 238, 0.35), 0 2px 8px rgba(8, 145, 178, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.08);
+  border-color: rgba(103, 232, 249, 0.6);
+  color: #ecfeff;
+}
+
 /* Dropdown menu */
 .run-mode-menu {
   display: none;
@@ -4258,6 +4280,7 @@ body.touch-device .terminal-container .xterm .xterm-helper-textarea {
 .run-mode-dot.opencode { background: #10b981; }
 .run-mode-dot.codex { background: #a855f7; }
 .run-mode-dot.gemini { background: #8ab4f8; }
+.run-mode-dot.antigravity { background: #22d3ee; }
 .run-mode-dot.shell { background: #94a3b8; }
 
 /* Phone-only Enter button (see index.html). Hidden by default at every width;

src/web/routes/session-routes.ts

@@ -19,6 +19,7 @@ import {
   type SessionColor,
   type CodexConfig,
   type GeminiConfig,
+  type AntigravityConfig,
 } from '../../types.js';
 import { Session, isAltScreenStripMode } from '../../session.js';
 import { SseEvent } from '../sse-events.js';
@@ -282,25 +283,35 @@ export function _resetPasteRateBuckets(): void {
 
 /**
  * Security (multi-user §6.3): the Claude-only permission-mode downgrade does not
- * cover the other CLIs' bypass switches. Codex `--dangerously-bypass-approvals-and-sandbox`
- * and Gemini `--approval-mode yolo` disable the safety classifier the non-granted-user
- * downgrade is meant to keep on, so clamp them for a non-granted owner. buildGeminiCommand
- * defaults an ABSENT approvalMode to yolo, so the gemini config must be MATERIALIZED
- * (auto_edit) even when the request sent none. No-op in single-user mode / for a granted
+ * cover the other CLIs' bypass switches. Codex `--dangerously-bypass-approvals-and-sandbox`,
+ * Gemini `--approval-mode yolo`, and Antigravity `--dangerously-skip-permissions` disable
+ * the safety classifier the non-granted-user downgrade is meant to keep on, so clamp them
+ * for a non-granted owner. buildGeminiCommand defaults an ABSENT approvalMode to yolo, so
+ * the gemini config must be MATERIALIZED (auto_edit) even when the request sent none.
+ * Antigravity is like Codex: an ABSENT config already defaults safe (no bypass flag), so
+ * only a sent config needs the flag forced off. No-op in single-user mode / for a granted
  * owner (canUsernameRunPrivilegedCommands returns true when !isMultiUserMode()).
  */
 async function clampExternalCliBypassForOwner(
   owner: string | undefined,
   codexConfig: CodexConfig | undefined,
-  geminiConfig: GeminiConfig | undefined
-): Promise<{ codexConfig: CodexConfig | undefined; geminiConfig: GeminiConfig | undefined }> {
+  geminiConfig: GeminiConfig | undefined,
+  antigravityConfig: AntigravityConfig | undefined
+): Promise<{
+  codexConfig: CodexConfig | undefined;
+  geminiConfig: GeminiConfig | undefined;
+  antigravityConfig: AntigravityConfig | undefined;
+}> {
   const granted = await canUsernameRunPrivilegedCommands(owner);
-  if (granted) return { codexConfig, geminiConfig };
-  // Non-granted: force codex bypass off (only meaningful when a config was sent) and
-  // materialize gemini to auto_edit (clamps an explicit 'yolo' and the yolo default).
+  if (granted) return { codexConfig, geminiConfig, antigravityConfig };
+  // Non-granted: force codex/antigravity bypass off (only meaningful when a config was
+  // sent) and materialize gemini to auto_edit (clamps an explicit 'yolo' and the yolo default).
   const clampedCodex = codexConfig ? { ...codexConfig, dangerouslyBypassApprovals: false } : codexConfig;
   const clampedGemini: GeminiConfig = { ...(geminiConfig ?? {}), approvalMode: 'auto_edit' };
-  return { codexConfig: clampedCodex, geminiConfig: clampedGemini };
+  const clampedAntigravity = antigravityConfig
+    ? { ...antigravityConfig, dangerouslySkipPermissions: false }
+    : antigravityConfig;
+  return { codexConfig: clampedCodex, geminiConfig: clampedGemini, antigravityConfig: clampedAntigravity };
 }
 
 export function registerSessionRoutes(
@@ -414,6 +425,7 @@ export function registerSessionRoutes(
       body.mode !== 'opencode' &&
       body.mode !== 'codex' &&
       body.mode !== 'gemini' &&
+      body.mode !== 'antigravity' &&
       body.envOverrides &&
       Object.keys(body.envOverrides).length > 0 &&
       (workingDir.startsWith(CASES_DIR + '/') || workingDir.startsWith(managedCasesBase + '/'));
@@ -480,6 +492,15 @@ export function registerSessionRoutes(
         );
       }
     }
+    if (body.mode === 'antigravity') {
+      const { isAntigravityAvailable } = await import('../../utils/antigravity-cli-resolver.js');
+      if (!isAntigravityAvailable()) {
+        return createErrorResponse(
+          ApiErrorCode.OPERATION_FAILED,
+          'Antigravity CLI not found. Install with: curl -fsSL https://antigravity.google/cli/install.sh | bash'
+        );
+      }
+    }
 
     // Pre-validate resumeSessionId: check that the conversation file actually exists
     // in Claude's projects directory. If not, skip resume to avoid confusing
@@ -521,18 +542,20 @@ export function registerSessionRoutes(
           ? body.codexConfig?.model
           : mode === 'gemini'
             ? body.geminiConfig?.model
-            : mode !== 'shell'
-              ? modelConfig?.defaultModel || undefined
-              : undefined;
+            : mode === 'antigravity'
+              ? body.antigravityConfig?.model
+              : mode !== 'shell'
+                ? modelConfig?.defaultModel || undefined
+                : undefined;
     const claudeModeConfig = await ctx.getClaudeModeConfig();
     // Section 6.3: force non-granted users to a classifier-guarded mode.
     const effectiveClaudeMode = await resolveClaudeModeForUsername(claudeModeConfig.claudeMode, owner);
-    // Section 6.3: clamp Codex/Gemini bypass switches for a non-granted owner (no-op single-user/granted).
-    const { codexConfig: gatedCodexConfig, geminiConfig: gatedGeminiConfig } = await clampExternalCliBypassForOwner(
-      owner,
-      body.codexConfig,
-      body.geminiConfig
-    );
+    // Section 6.3: clamp Codex/Gemini/Antigravity bypass switches for a non-granted owner (no-op single-user/granted).
+    const {
+      codexConfig: gatedCodexConfig,
+      geminiConfig: gatedGeminiConfig,
+      antigravityConfig: gatedAntigravityConfig,
+    } = await clampExternalCliBypassForOwner(owner, body.codexConfig, body.geminiConfig, body.antigravityConfig);
     const terminalHistoryConfig = await ctx.getTerminalHistoryConfig();
     const session = new Session({
       workingDir,
@@ -547,6 +570,7 @@ export function registerSessionRoutes(
       openCodeConfig: mode === 'opencode' ? body.openCodeConfig : undefined,
       codexConfig: mode === 'codex' ? gatedCodexConfig : undefined,
       geminiConfig: mode === 'gemini' ? gatedGeminiConfig : undefined,
+      antigravityConfig: mode === 'antigravity' ? gatedAntigravityConfig : undefined,
       resumeSessionId: validatedResumeId,
       envOverrides: body.envOverrides,
       effort: body.effort,
@@ -760,11 +784,12 @@ export function registerSessionRoutes(
 
     try {
       // Auto-detect completion phrase from CLAUDE.md BEFORE starting (only if globally enabled and not explicitly disabled by user)
-      // Ralph tracker is not supported for opencode / codex / gemini sessions
+      // Ralph tracker is not supported for opencode / codex / gemini / antigravity sessions
       if (
         session.mode !== 'opencode' &&
         session.mode !== 'codex' &&
         session.mode !== 'gemini' &&
+        session.mode !== 'antigravity' &&
         ctx.store.getConfig().ralphEnabled &&
         !session.ralphTracker.autoEnableDisabled
       ) {
@@ -1943,6 +1968,7 @@ export function registerSessionRoutes(
       openCodeConfig,
       codexConfig,
       geminiConfig,
+      antigravityConfig,
       envOverrides,
       effort,
     } = parseBody(QuickStartSchema, req.body);
@@ -1988,6 +2014,7 @@ export function registerSessionRoutes(
         modelOverride !== undefined ||
         codexConfig ||
         geminiConfig ||
+        antigravityConfig ||
         openCodeConfig
       ) {
         return createErrorResponse(
@@ -2018,6 +2045,7 @@ export function registerSessionRoutes(
         effort ||
         codexConfig ||
         geminiConfig ||
+        antigravityConfig ||
         openCodeConfig
       ) {
         return createErrorResponse(
@@ -2110,6 +2138,17 @@ export function registerSessionRoutes(
         }
       }
 
+      // Check Antigravity availability if requested
+      if (mode === 'antigravity') {
+        const { isAntigravityAvailable } = await import('../../utils/antigravity-cli-resolver.js');
+        if (!isAntigravityAvailable()) {
+          return createErrorResponse(
+            ApiErrorCode.OPERATION_FAILED,
+            'Antigravity CLI not found. Install with: curl -fsSL https://antigravity.google/cli/install.sh | bash'
+          );
+        }
+      }
+
       // Resolve case path: check linked-cases registry first, then fall back to CASES_DIR.
       // This mirrors the behaviour of resolveCasePath() in case-routes so that linked
       // external project directories are honoured by quick-start just like regular case routes.
@@ -2156,8 +2195,8 @@ export function registerSessionRoutes(
         writeFileSync(join(resolvedCasePath, 'CLAUDE.md'), claudeMd);
 
         // Write .claude/settings.local.json with hooks for desktop notifications
-        // (Claude-specific — OpenCode, Codex, and Gemini use their own systems)
-        if (mode !== 'opencode' && mode !== 'codex' && mode !== 'gemini') {
+        // (Claude-specific — OpenCode, Codex, Gemini, and Antigravity use their own systems)
+        if (mode !== 'opencode' && mode !== 'codex' && mode !== 'gemini' && mode !== 'antigravity') {
           await writeHooksConfig(resolvedCasePath);
         }
 
@@ -2177,7 +2216,14 @@ export function registerSessionRoutes(
     // Scaffold hooks (+ a CLAUDE.md) if MISSING so in-container permission prompts and
     // hook-idle detection fire (decision: wire hooks now). Never clobbers an existing
     // configured project. Skipped for external CLIs (they use their own systems).
-    if (docker && docker.hooksEnabled && mode !== 'opencode' && mode !== 'codex' && mode !== 'gemini') {
+    if (
+      docker &&
+      docker.hooksEnabled &&
+      mode !== 'opencode' &&
+      mode !== 'codex' &&
+      mode !== 'gemini' &&
+      mode !== 'antigravity'
+    ) {
       try {
         if (!existsSync(join(resolvedCasePath, 'CLAUDE.md'))) {
           const templatePath = await ctx.getDefaultClaudeMdPath();
@@ -2206,6 +2252,7 @@ export function registerSessionRoutes(
       mode !== 'opencode' &&
       mode !== 'codex' &&
       mode !== 'gemini' &&
+      mode !== 'antigravity' &&
       !remote &&
       envOverrides &&
       Object.keys(envOverrides).length > 0
@@ -2224,17 +2271,19 @@ export function registerSessionRoutes(
           ? codexConfig?.model
           : mode === 'gemini'
             ? geminiConfig?.model
-            : mode !== 'shell'
-              ? qsModelConfig?.defaultModel || undefined
-              : undefined;
+            : mode === 'antigravity'
+              ? antigravityConfig?.model
+              : mode !== 'shell'
+                ? qsModelConfig?.defaultModel || undefined
+                : undefined;
     const qsClaudeModeConfig = await ctx.getClaudeModeConfig();
     const qsEffectiveClaudeMode = await resolveClaudeModeForUsername(qsClaudeModeConfig.claudeMode, owner);
-    // Section 6.3: clamp Codex/Gemini bypass switches for a non-granted owner (no-op single-user/granted).
-    const { codexConfig: qsGatedCodexConfig, geminiConfig: qsGatedGeminiConfig } = await clampExternalCliBypassForOwner(
-      owner,
-      codexConfig,
-      geminiConfig
-    );
+    // Section 6.3: clamp Codex/Gemini/Antigravity bypass switches for a non-granted owner (no-op single-user/granted).
+    const {
+      codexConfig: qsGatedCodexConfig,
+      geminiConfig: qsGatedGeminiConfig,
+      antigravityConfig: qsGatedAntigravityConfig,
+    } = await clampExternalCliBypassForOwner(owner, codexConfig, geminiConfig, antigravityConfig);
     const qsTerminalHistoryConfig = await ctx.getTerminalHistoryConfig();
     const session = new Session({
       workingDir: resolvedCasePath,
@@ -2250,6 +2299,7 @@ export function registerSessionRoutes(
       openCodeConfig: mode === 'opencode' ? openCodeConfig : undefined,
       codexConfig: mode === 'codex' ? qsGatedCodexConfig : undefined,
       geminiConfig: mode === 'gemini' ? qsGatedGeminiConfig : undefined,
+      antigravityConfig: mode === 'antigravity' ? qsGatedAntigravityConfig : undefined,
       envOverrides,
       effort,
       remote,

src/web/routes/system-routes.ts

@@ -374,7 +374,7 @@ export function registerSystemRoutes(
   });
 
   // ═══════════════════════════════════════════════════════════════
-  // CLI Integrations (OpenCode, Codex, Gemini)
+  // CLI Integrations (OpenCode, Codex, Gemini, Antigravity)
   // ═══════════════════════════════════════════════════════════════
 
   // ========== OpenCode ==========
@@ -405,6 +405,16 @@ export function registerSystemRoutes(
     };
   });
 
+  // ========== Antigravity ==========
+
+  app.get('/api/antigravity/status', async () => {
+    const { isAntigravityAvailable, resolveAntigravityDir } = await import('../../utils/antigravity-cli-resolver.js');
+    return {
+      available: isAntigravityAvailable(),
+      path: resolveAntigravityDir(),
+    };
+  });
+
   // ═══════════════════════════════════════════════════════════════
   // State & Lifecycle (cleanup, lifecycle log, stats)
   // ═══════════════════════════════════════════════════════════════

src/web/schemas.ts

@@ -86,7 +86,7 @@ export const FilesystemPreviewQuerySchema = z.object({
 // ========== Env Var Allowlist ==========
 
 /** Allowlisted env var key prefixes */
-const ALLOWED_ENV_PREFIXES = ['CLAUDE_CODE_', 'OPENCODE_', 'CODEX_', 'GEMINI_', 'GOOGLE_'];
+const ALLOWED_ENV_PREFIXES = ['CLAUDE_CODE_', 'OPENCODE_', 'CODEX_', 'GEMINI_', 'GOOGLE_', 'ANTIGRAVITY_'];
 
 /** Env var keys that are always blocked (security-sensitive) */
 const BLOCKED_ENV_KEYS = new Set([
@@ -116,7 +116,7 @@ const safeEnvOverridesSchema = z
     },
     {
       message:
-        'envOverrides contains blocked or disallowed env var keys. Only CLAUDE_CODE_*, OPENCODE_*, CODEX_*, GEMINI_*, and GOOGLE_* keys are allowed.',
+        'envOverrides contains blocked or disallowed env var keys. Only CLAUDE_CODE_*, OPENCODE_*, CODEX_*, GEMINI_*, GOOGLE_*, and ANTIGRAVITY_* keys are allowed.',
     }
   );
 
@@ -206,9 +206,26 @@ const GeminiConfigSchema = z
   })
   .optional();
 
+/** Schema for Antigravity CLI (agy)-specific configuration */
+const AntigravityConfigSchema = z
+  .object({
+    model: z
+      .string()
+      .max(100)
+      .regex(/^[a-zA-Z0-9._\-/]+$/)
+      .optional(),
+    dangerouslySkipPermissions: z.boolean().optional(),
+    resumeConversationId: z
+      .string()
+      .max(100)
+      .regex(/^[a-zA-Z0-9._-]+$/)
+      .optional(),
+  })
+  .optional();
+
 export const CreateSessionSchema = z.object({
   workingDir: safePathSchema.optional(),
-  mode: z.enum(['claude', 'shell', 'opencode', 'codex', 'gemini']).optional(),
+  mode: z.enum(['claude', 'shell', 'opencode', 'codex', 'gemini', 'antigravity']).optional(),
   name: z.string().max(100).optional(),
   envOverrides: safeEnvOverridesSchema,
   /** Claude CLI effort level (soft default via --settings, switchable in-session via /effort) */
@@ -220,6 +237,7 @@ export const CreateSessionSchema = z.object({
   openCodeConfig: OpenCodeConfigSchema,
   codexConfig: CodexConfigSchema,
   geminiConfig: GeminiConfigSchema,
+  antigravityConfig: AntigravityConfigSchema,
   /** Resume a previous Claude conversation by its session ID (used for reboot recovery) */
   resumeSessionId: z
     .string()
@@ -328,6 +346,7 @@ const RemoteCommandOverridesSchema = z
     opencode: z.string().min(1).max(300).optional(),
     codex: z.string().min(1).max(300).optional(),
     gemini: z.string().min(1).max(300).optional(),
+    antigravity: z.string().min(1).max(300).optional(),
   })
   .strict()
   .optional();
@@ -600,10 +619,11 @@ export const QuickStartSchema = z.object({
    *  a real host dir, so the settings file crosses the bind mount); rejected for
    *  remote cases (the file would be written on the WRONG machine). */
   modelOverride: z.string().max(50).optional(),
-  mode: z.enum(['claude', 'shell', 'opencode', 'codex', 'gemini']).optional(),
+  mode: z.enum(['claude', 'shell', 'opencode', 'codex', 'gemini', 'antigravity']).optional(),
   openCodeConfig: OpenCodeConfigSchema,
   codexConfig: CodexConfigSchema,
   geminiConfig: GeminiConfigSchema,
+  antigravityConfig: AntigravityConfigSchema,
   envOverrides: safeEnvOverridesSchema,
   /** Claude CLI effort level (soft default via --settings, switchable in-session via /effort) */
   effort: effortLevelSchema,
@@ -957,7 +977,7 @@ const noNewlines = (v: string) => !/[\r\n]/.test(v);
 /** Shared field shape for creating/updating a scheduled job. */
 const CronJobBaseSchema = z.object({
   name: z.string().min(1).max(200),
-  agentType: z.enum(['claude', 'shell', 'opencode', 'codex', 'gemini']),
+  agentType: z.enum(['claude', 'shell', 'opencode', 'codex', 'gemini', 'antigravity']),
   workingDir: safePathSchema,
   launchCommand: z.string().max(2000).refine(noNewlines, 'launchCommand must be a single line').optional(),
   promptMode: z.enum(['inline_text', 'prompt_file_path']),

src/web/server.ts

@@ -2461,6 +2461,7 @@ export class WebServer extends EventEmitter {
               openCodeConfig: muxSession.mode === 'opencode' ? savedState?.openCodeConfig : undefined,
               codexConfig: muxSession.mode === 'codex' ? savedState?.codexConfig : undefined,
               geminiConfig: muxSession.mode === 'gemini' ? savedState?.geminiConfig : undefined,
+              antigravityConfig: muxSession.mode === 'antigravity' ? savedState?.antigravityConfig : undefined,
               envOverrides: savedEnvOverrides,
               effort: savedState?.effort,
               attachmentHistory: savedAttachmentHistory,