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Clawdia macOS IPC architecture

Current model: a local Unix socket connects the node host service to the macOS app for exec approvals + system.run. A clawdia-mac debug CLI exists for discovery/connect checks; agent actions still flow through the Gateway WebSocket and node.invoke. UI automation uses PeekabooBridge.

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Goals

  • Single GUI app instance that owns all TCC-facing work (notifications, screen recording, mic, speech, AppleScript).
  • A small surface for automation: Gateway + node commands, plus PeekabooBridge for UI automation.
  • Predictable permissions: always the same signed bundle ID, launched by launchd, so TCC grants stick.

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How it works

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Gateway + node transport

  • The app runs the Gateway (local mode) and connects to it as a node.
  • Agent actions are performed via node.invoke (e.g. system.run, system.notify, canvas.*).

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Node service + app IPC

  • A headless node host service connects to the Gateway WebSocket.
  • system.run requests are forwarded to the macOS app over a local Unix socket.
  • The app performs the exec in UI context, prompts if needed, and returns output.
Diagram (SCI): 
Agent -> Gateway -> Node Service (WS)
                      |  IPC (UDS + token + HMAC + TTL)
                      v
                  Mac App (UI + TCC + system.run)

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PeekabooBridge (UI automation)

  • UI automation uses a separate UNIX socket named bridge.sock and the PeekabooBridge JSON protocol.
  • Host preference order (client-side): Peekaboo.app → Claude.app → Clawdia.app → local execution.
  • Security: bridge hosts require an allowed TeamID; DEBUG-only same-UID escape hatch is guarded by PEEKABOO_ALLOW_UNSIGNED_SOCKET_CLIENTS=1 (Peekaboo convention).
  • See: PeekabooBridge usage for details.

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Operational flows

  • Restart/rebuild: SIGN_IDENTITY="Apple Development: <Developer Name> (<TEAMID>)" scripts/restart-mac.sh
    • Kills existing instances
    • Swift build + package
    • Writes/bootstraps/kickstarts the LaunchAgent
  • Single instance: app exits early if another instance with the same bundle ID is running.

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Hardening notes

  • Prefer requiring a TeamID match for all privileged surfaces.
  • PeekabooBridge: PEEKABOO_ALLOW_UNSIGNED_SOCKET_CLIENTS=1 (DEBUG-only) may allow same-UID callers for local development.
  • All communication remains local-only; no network sockets are exposed.
  • TCC prompts originate only from the GUI app bundle; keep the signed bundle ID stable across rebuilds.
  • IPC hardening: socket mode 0600, token, peer-UID checks, HMAC challenge/response, short TTL.