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simbridge — remaining work

See CLAUDE.md for architecture, implemented commands, and design decisions.

Daemon

The current CLI is stateless: each invocation shells out directly, and idb_companion is lazy-started and left running. The daemon is the next major milestone.

Daemon responsibilities:

  • Detect running simulators (via simctl)
  • Spawn and manage one idb_companion --udid <udid> process per running simulator
  • Maintain gRPC connections to each companion
  • Route CLI commands to the correct companion
  • Clean up companions when simulators shut down
  • Own the event timeline (simulator boots/shutdowns, app launches, periodic state snapshots)

CLI commands are already structured as thin RPCs to the daemon, so the surface won't change — only the backend wiring.

Event timeline

Record a timeline of simulator-related events:

  • Simulator boot / shutdown
  • App launches
  • Periodic state snapshots / screenshots

Communication with other systems

Use-cases (TBD on push vs. pull architecture):

  1. Remote-control the simulator
  2. Stream the simulator screen
  3. Expose events and control via MCP tools for LLM agents (e.g., record video for one-shot PRs)