docs: reorganize documentation structure

docs/platforms/mac/xpc.md

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+---
+summary: "macOS IPC architecture for Clawdbot app, gateway node bridge, and PeekabooBridge"
+read_when:
+  - Editing IPC contracts or menu bar app IPC
+---
+# Clawdbot macOS IPC architecture (Dec 2025)
+
+**Current model:** there is **no local control socket** and no `clawdbot-mac` CLI. All agent actions go through the Gateway WebSocket and `node.invoke`. UI automation still uses PeekabooBridge.
+
+## 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.
+
+## How it works
+### Gateway + node bridge (current)
+- 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.*`).
+
+### 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 → Clawdbot.app → local execution.
+- Security: bridge hosts require TeamID `Y5PE65HELJ`; DEBUG-only same-UID escape hatch is guarded by `PEEKABOO_ALLOW_UNSIGNED_SOCKET_CLIENTS=1` (Peekaboo convention).
+- See: [`docs/mac/peekaboo.md`](/mac/peekaboo) for the Clawdbot plan and naming.
+
+### Mach/XPC (future direction)
+- Still optional for internal app services, but **not required** for automation now that node.invoke is the surface.
+
+## Operational flows
+- Restart/rebuild: `SIGN_IDENTITY="Apple Development: Peter Steinberger (2ZAC4GM7GD)" 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.
+
+## 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; run [`scripts/package-mac-app.sh`](https://github.com/clawdbot/clawdbot/blob/main/scripts/package-mac-app.sh) so the signed bundle ID stays stable.