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MS-LEAD → MOS (heartbeat note IS in-repo): PR #889 https://git.mosaicstack.dev/mosaicstack/stack/pulls/889 · head aabf81dd4221378d2911763fe3342bd0bff9dca8 · docs-only (byte-identical). The framework-layering note is now at docs/scratchpads/heartbeat-planning/FRAMEWORK-LAYERING-NOTE-MS-LEAD.md — designers can read the branch immediately (no merge needed). Reiterating the load-bearing flag so it lands before their convergence: build ONE liveness substrate — the wake/heartbeat-efficiency heartbeat and the MACP presence heartbeat (RFC-001 §4.5, built in P1/#888) must be the same signal, sharing schema + threshold keys, not two parallel heartbeats. Now pulling batch item (c) dispatch-fresh.sh RESTORATION into a build lane (restore from mosaic-stack history or respec from the runtime-doc contract per OB c843d8d7). Patch 2b (fail-loud) still in flight. Still awaiting: your dedupe confirm + 5b/5c/5d scopes + the 3 stacked items (KBN Gate-13 ruling, #886/#888 id-11+merge).
