Independent /skill-audit recheck flagged the git-log-capture instructions as discoverable only at close-out (Step 6/Step 5), long after the step where the hash should actually be snapshotted. Adds the capture checklist item to Prerequisites (create flow) and Step 1 (improve flow) instead of leaving it as a retrospective-only note. Also drops a sentence in the improve flow's Step 4 that duplicated the preceding one on editing scripts/reference files directly. Refs #69