Context Handover

Saves session state so the next session can resume without information loss.

State files

.harness/state.json — session lifecycle (read/write):

{
  "version": "1.0",
  "session": { "status": "idle", "started_at": "ISO 8601", "last_session": "ISO 8601" },
  "position": { "phase": "01-discuss", "active_task": "...", "resume_file": "...", "stopped_at": "..." }
}