ADR-011 decision 7 keys derivation on (namespace, identifier), which
separates forks but not collisions inside one namespace. The ecosystem is at
N1, a single implied namespace, and a 2026-08-21 fleet scan finds 20 reused
identifiers across 48 files all inside it. So ADR-011 alone does not satisfy
decision 2's uniqueness prerequisite.
Ruled: C2 derives for live records only; archived records keep frozen minted
identifiers. This reconciles Migration option 2 with the uniqueness
derivation needs, and cuts the remediation surface from 48 files to 11.
Records the two consequences that follow -- un-archiving is a collision
hazard, and derivation is not retroactive -- and why treating a repository as
the namespace was rejected.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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