asof

Ensure temporal awareness and prevent stale file read/write operations by verifying the fresh/stale state of in-context data.

Temporal awareness for Claude. Surfaces freshness verdicts on in-context data — files Read this session, dated content in user prompts, training-cutoff awareness — so stale information doesn't poison fresh reasoning. The hook pre-computes everything in Python; you read pre-computed verdicts and apply them. Never compute date arithmetic in chat — query asof_query if you need a specific gap and the hook hasn't surfaced it.