Coordinated work: post-review merge go-ahead belongs to the active coordinator/orchestrator session; solo delivery merges without routine confirmation as before. 'No self-merge' means no UNREVIEWED self-merge. Previously this policy existed only as per-host local patches to the preserved ~/.config/mosaic/AGENTS.md (web1 + sb-it-mgr-0-lt rule 38) and was lost from E2E-DELIVERY.md on every framework sync. Shipping it in defaults/AGENTS.md + guides/E2E-DELIVERY.md makes it permanent for fresh installs and upgrades. Policy: Jason, 2026-06-11. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>