Officer's session records are in memory and die with `pm2 restart officer`, while the agent is a PM2
peer and keeps generating. `adoptOrphanedSession` rebuilds a binding — but only when a browser
reconnects to a session *by id*, which you can only do if you already knew the id. So a session that
survived a restart was invisible, and nothing could answer "what is running right now".
`claude:list` returns each live session with `isGenerating` and `pendingTasks` — the same two fields the
agent's own `armIdle` consults before collecting a session, so a caller can tell "busy" from "merely
open" the way it does. Surfaced as `GET /chat/live`, which sits beside `/chat/sessions`: those are
transcripts on disk, these are the ones with a process behind them.
`getActiveSessionKeys` is replaced rather than joined. It returned bare keys, could not distinguish a
session mid-turn from one merely open, and had never been called by anything.
`listLiveClaudeSessions` fails toward EMPTY, where `isClaudeGenerating` beside it fails toward alive.
The asymmetry is deliberate: not knowing there means leaving a spinner up, and not knowing here would
mean inventing sessions.
Step 2 of docs/chat-session-lifetime.md.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>