HA WebSocket source

Status: Later
Milestone: After two-week live test
Spec: Sources §6
Package: external source module

Goal

Subscribe to Home Assistant state_changed events via /api/websocket; emit one journal event per state change.

Interfaces

Source module — Emit(event) per HA state change. Suggested type: homeassistant.state_changed.

Implementation notes

• Module config: HA URL, long-lived access token
• Payload: entity_id, old/new state, attributes
• source: entity_id or domain
• Handle HA reconnect

Acceptance criteria

• [ ] Connects to HA WebSocket API
• [ ] State changes append journal events
• [ ] Reconnects after HA restart

Dependencies

• Blocked by: journal, module runtime

Open questions

• Filter which entities/domains to subscribe to