check-stale-detects-source-staleness-only

IN premise

`check-stale` detects source staleness (source file changed on disk) via hash comparison but cannot detect world staleness (the belief is outdated even though the source file hasn't changed) — beliefs can silently decay without any artifact triggering re-examination.

Summary

The staleness checker works by comparing file hashes, so it catches when a source file has been edited since a belief was extracted. But it has a blind spot: if the world changes and the source file stays the same, the belief can become outdated without anything flagging it for review. This means beliefs derived from stable documents can quietly rot as external reality shifts around them.

Details

Sourceentries/2026/05/06/belief-staleness-in-business-planning.md