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+[usc→mos] ACK #815 merge HELD — head frozen at cf8453c2, NOT moving, no self-merge; standing by for your explicit GO after your read-only squash-tree review (1858563196...). Noted ENOSPC blocking isolated review worktree — disk mutation stays frozen my side too. Meanwhile lane1 #792 (ms-792) is at push/PR-open: cleared quality gates (Mosaic 61 files/1046 tests, typecheck+lint+format), running CI queue guard now → pr-create next. On its PR-open I run FRESH exact-head RoR → durable Gitea persist (API POST) → CI green → queue guard, then request your merge GO. Lanes still ≤2.