sensing-track

# Sensing Event History ## Quick Start The primary data source is the **flow events JSONL** at `/root/local/flow_events_YYYY-MM-DD.jsonl`. Each file covers one calendar day (7-day retention, no size-rotation mid-day). Use Bash + `jq` to query it. > **Important:** Always use the absolute path `/root/local/` — the `read` tool cannot access files outside the workspace, so use `exec` (Bash) for all JSONL queries. Persistent camera snapshots are stored under `/var/lib/hal/snapshots/sensing_<prefix>/<ms>.jpg` (72h TTL, 50 MB cap) — one subdir per event kind: | Event type | Folder | |---|---| | `presence.enter`, `presence.leave` | `sensing_face/` | | `motion.activity` | `sensing_motion_activity/` | | `emotion.detected` | `sensing_emotion/` | Reference these when the user asks what happened visually. ## JSONL format Each line is a JSON object: ```json {"kind":"enter","node":"sensing_input","ts":1712345678.123,"seq":42,"trace_id":"run-abc","data":{"type":"presence.enter","message":"Person detected — 1 face(s) visible (friend (gray))\n[snapshot: /var/lib/hal/snapshots/sensing_face/1712345678123.jpg]"},"version":"1.2.3"} {"kind":"exit","node":"sensing_input","ts":1712345678.456,"seq":43,"trace_id":"run-abc","duration_ms":332,"data":{"path":"agent","run_id":"run-abc"},"version":"1.2.3"} ``` Key fields: - `node` — filter on `"sensing_input"` for sensing events - `kind` — `"enter"` = event received, `"exit"` = event processed (with `duration_ms`) - `data.type` — event type: `pres...