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history-hygiene

Record reconciled final outcomes to history.md, not intermediate requests or obsolete claims

.copilot/skills/history-hygiene/SKILL.md

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## Context

History files are cold-start context, not the source of truth for live behavior. Stale or incorrect
entries poison decision-making downstream. A stale-history incident proved that an old history claim
can cause future spawns to repeat a reversed decision. Reconcile an operational claim with current
implementation, workflows, tests, documentation, skills, and applicable decisions before acting on it.

## Patterns

- **Record the final outcome**, not the initial request.
- **Wait for confirmation** before writing to history — don't log intermediate states.
- **If a decision reverses**, update the entry immediately — don't leave stale data.
- **Link authority for operational facts.** Name the current source or workflow when a lesson
  depends on live behavior.