BDR-058 + LRN-109. Root cause of the "referenced files absent" finding:
the skills CLI's skillPath only fetches SKILL.md, never sibling
references/scripts/templates dirs. Upstream HEAD matched the already-
recorded lockfile hash exactly (no drift, no tamper) — reinstalled the
full tree at that pinned SHA, detached HEAD so nothing can silently
advance. Reinstall happened outside this repo (~/.agents); this commit
is the only repo-side record. Backup of the old single-file dir kept.
Bastien Chanot
c34ac99882