Maestro/CLAUDE-PATTERNS.md

CLAUDE-PATTERNS.md

Core implementation patterns for the Maestro codebase. For the main guide, see CLAUDE.md.

1. Process Management

Each session runs two processes simultaneously:

• AI agent process (Claude Code, etc.) - spawned with -ai suffix
• Terminal process (PTY shell) - spawned with -terminal suffix

// Session stores both PIDs
session.aiPid       // AI agent process
session.terminalPid // Terminal process

2. Security Requirements

Always use execFileNoThrow for external commands:

import { execFileNoThrow } from './utils/execFile';
const result = await execFileNoThrow('git', ['status'], cwd);
// Returns: { stdout, stderr, exitCode } - never throws

Never use shell-based command execution - it creates injection vulnerabilities. The execFileNoThrow utility is the safe alternative.

3. Settings Persistence

Add new settings in useSettings.ts:

// 1. Add state with default value
const [mySetting, setMySettingState] = useState(defaultValue);

// 2. Add wrapper that persists
const setMySetting = (value) => {
  setMySettingState(value);
  window.maestro.settings.set('mySetting', value);
};

// 3. Load from batch response in useEffect (settings use batch loading)
// In the loadSettings useEffect, extract from allSettings object:
const allSettings = await window.maestro.settings.getAll();
const savedMySetting = allSettings['mySetting'];
if (savedMySetting !== undefined) setMySettingState(savedMySetting);

4. Adding Modals

1. Create component in src/renderer/components/
2. Add priority in src/renderer/constants/modalPriorities.ts
3. Register with layer stack:

import { useLayerStack } from '../contexts/LayerStackContext';
import { MODAL_PRIORITIES } from '../constants/modalPriorities';

const { registerLayer, unregisterLayer } = useLayerStack();
const onCloseRef = useRef(onClose);
onCloseRef.current = onClose;

useEffect(() => {
  if (isOpen) {
    const id = registerLayer({
      type: 'modal',
      priority: MODAL_PRIORITIES.YOUR_MODAL,
      onEscape: () => onCloseRef.current(),
    });
    return () => unregisterLayer(id);
  }
}, [isOpen, registerLayer, unregisterLayer]);

5. Theme Colors

Themes have 13 required colors. Use inline styles for theme colors:

style={{ color: theme.colors.textMain }}  // Correct
className="text-gray-500"                  // Wrong for themed text

6. Multi-Tab Sessions

Sessions support multiple AI conversation tabs:

// Each session has an array of tabs
session.aiTabs: AITab[]
session.activeTabId: string

// Each tab maintains its own conversation
interface AITab {
  id: string;
  name: string;
  logs: LogEntry[];           // Tab-specific history
  agentSessionId?: string;    // Agent session continuity
}

// Tab operations
const activeTab = session.aiTabs.find(t => t.id === session.activeTabId);

7. Execution Queue

Messages are queued when the AI is busy:

// Queue items for sequential execution
interface QueuedItem {
  type: 'message' | 'slashCommand';
  content: string;
  timestamp: number;
}

// Add to queue instead of sending directly when busy
session.executionQueue.push({ type: 'message', content, timestamp: Date.now() });

8. Auto Run

File-based document automation system:

// Auto Run state on session
session.autoRunFolderPath?: string;    // Document folder path
session.autoRunSelectedFile?: string;  // Currently selected document
session.autoRunMode?: 'edit' | 'preview';

// API for Auto Run operations
window.maestro.autorun.listDocuments(folderPath);
window.maestro.autorun.readDocument(folderPath, filename);
window.maestro.autorun.saveDocument(folderPath, filename, content);

Worktree Support: Auto Run can operate in a git worktree, allowing users to continue interactive editing in the main repo while Auto Run processes tasks in the background. When batchRunState.worktreeActive is true, read-only mode is disabled and a git branch icon appears in the UI. See useBatchProcessor.ts for worktree setup logic.

Playbook Assets: Playbooks can include non-markdown assets (config files, YAML, Dockerfiles, scripts) in an assets/ subfolder. When installing playbooks from the marketplace or importing from ZIP files, Maestro copies the entire folder structure including assets. See the Maestro-Playbooks repository for the convention documentation.

playbook-folder/
├── 01_TASK.md
├── 02_TASK.md
├── README.md
└── assets/
    ├── config.yaml
    ├── Dockerfile
    └── setup.sh

Documents can reference assets using {{AUTORUN_FOLDER}}/assets/filename. The manifest lists assets explicitly:

{
  "id": "example-playbook",
  "documents": [...],
  "assets": ["config.yaml", "Dockerfile", "setup.sh"]
}

9. Tab Hover Overlay Menu

AI conversation tabs display a hover overlay menu after a 400ms delay when hovering over tabs with an established session. The overlay includes tab management and context operations:

Menu Structure:

// Tab operations (always shown)
- Copy Session ID (if session exists)
- Star/Unstar Session (if session exists)
- Rename Tab
- Mark as Unread

// Context management (shown when applicable)
- Context: Compact (if tab has 5+ messages)
- Context: Merge Into (if session exists)
- Context: Send to Agent (if session exists)

// Tab close actions (always shown)
- Close (disabled if only one tab)
- Close Others (disabled if only one tab)
- Close Tabs to the Left (disabled if first tab)
- Close Tabs to the Right (disabled if last tab)

Implementation Pattern:

const [overlayOpen, setOverlayOpen] = useState(false);
const [overlayPosition, setOverlayPosition] = useState<{ top: number; left: number } | null>(null);

const handleMouseEnter = () => {
  if (!tab.agentSessionId) return; // Only for established sessions

  hoverTimeoutRef.current = setTimeout(() => {
    if (tabRef.current) {
      const rect = tabRef.current.getBoundingClientRect();
      setOverlayPosition({ top: rect.bottom + 4, left: rect.left });
    }
    setOverlayOpen(true);
  }, 400);
};

// Render overlay via portal to escape stacking context
{overlayOpen && overlayPosition && createPortal(
  <div style={{ top: overlayPosition.top, left: overlayPosition.left }}>
    {/* Overlay menu items */}
  </div>,
  document.body
)}

Key Features:

• Appears after 400ms hover delay (only for tabs with agentSessionId)
• Fixed positioning at tab bottom
• Mouse can move from tab to overlay without closing
• Disabled states with visual feedback (opacity-40, cursor-default)
• Theme-aware styling
• Dividers separate action groups

See src/renderer/components/TabBar.tsx (Tab component) for implementation details.

10. SSH Remote Sessions

Sessions can execute commands on remote hosts via SSH. Critical: There are two different SSH identifiers with different lifecycles:

// Set AFTER AI agent spawns (via onSshRemote callback)
session.sshRemoteId: string | undefined

// Set BEFORE spawn (user configuration)
session.sessionSshRemoteConfig: {
  enabled: boolean;
  remoteId: string | null;      // The SSH config ID
  workingDirOverride?: string;
}

Common pitfall: sshRemoteId is only populated after the AI agent spawns. For terminal-only SSH sessions (no AI agent), it remains undefined. Always use both as fallback:

// WRONG - fails for terminal-only SSH sessions
const sshId = session.sshRemoteId;

// CORRECT - works for all SSH sessions
const sshId = session.sshRemoteId || session.sessionSshRemoteConfig?.remoteId;

This applies to any operation that needs to run on the remote:

• window.maestro.fs.readDir(path, sshId)
• gitService.isRepo(path, sshId)
• Directory existence checks for cd command tracking

Similarly for checking if a session is remote:

// WRONG
const isRemote = !!session.sshRemoteId;

// CORRECT
const isRemote = !!session.sshRemoteId || !!session.sessionSshRemoteConfig?.enabled;