Resolve the conflict between ADR-011 (tags-not-digests) and the security work
(digest pinning) with one coherent rule that respects ADR-011's stateless/stateful
split:
- Stateful → pin `tag@digest` (readable tag + integrity digest): legible diffs AND
tamper-evidence. Snapshots cover broken updates; the digest covers swapped images.
- Stateless → rolling tags (latest/stable); digest-pinning would defeat the rolling
design. Integrity rests on official/verified images + disposability.
Aligned across ADR-011 (decision 2), ADR-004 (image management), ADR-002
(supply-chain row), accepted-risk R1, the service checklist, and TODO 15.6.
TODO 16.7 marked decided.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
sjat
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