hns-lsel-curator

Run session_drain.sh with --inbox pointing to lessons-inbox.jsonl and --state-dir for LSEL state. It acquires a lock, archives any existing clusters.json, then runs drain.sh to filter noise, cluster by event_key, and advance the companion offset.

drain.sh applies a drain-side severity filter before clustering, discarding tool_failure:Bash:UnknownFailure, tool_failure:Bash:SandboxViolation, and any event_key ending in :TimeoutError. The filter runs on read because the inbox writer is outside the loop-writable surfaces.

No. The inbox is append-only and never mutated; a companion offset in drain-offset.json marks consumed stubs. Candidates stage only in clusters.json, and the M1 invariant guarantees zero writes to memory/ feedback files.

session_drain.sh uses a mkdir-based exclusive lock; contention results in a safe no-op with a stderr notice and exit 0. Stale locks older than 120 seconds are reaped, and the hook never blocks session start.

Every session-start drain overwrites clusters.json, including no-op drains that write empty candidates. The wrapper unconditionally archives the prior file to clusters-history/ first, so proposals must read the archived copies, not the live file.

reflect.sh fires when accumulated importance across active feedback_*.md files clears the threshold (default 150) with at least 3 topics, not on a calendar schedule. It synthesizes one principle file and moves originals to memory/_archive/ without deleting them.