Task-by-task docs plan: author ADR-015 and reconcile ADR-001/005/008/009/012,
the new-host and rotate-secrets runbooks, accepted-risks, STATUS, and CLAUDE.md.
Documentation-only; the physical box stays "designed, not built".
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
