rev-974 finished its RM-02 review and could not post it: pr-review.sh failed with
'Gitea token not found'. Verified — with MOSAIC_GIT_IDENTITY unset the token does not
resolve; with it set it resolves. The token file was correct throughout.
My own context reset wiped the seat's exported identity and my rehydration brief did not
re-establish it. git config mosaic.gitIdentity is persistent and per-worktree;
MOSAIC_GIT_IDENTITY is ephemeral and per-context. rev-974 works from ~/agent-work with no
git-config fallback, so it had no warning and the loss surfaced only when it next needed
a credential.
Intersection of two banked findings, created by acting on one: D-31 prescribes rotation,
D-11a requires identity coherence, and nothing said rotation is a credential-affecting
operation. The fix for one failure introduced another.
RM-34: rotation must re-establish AND verify seat identity before handing over work.
RM-50: prefer the durable binding (mosaic.gitIdentity in the seat's repo) so identity
survives a reset by construction. Interim: every rehydration brief re-exports identity.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
