2026-07-16 — M6 synthesis, two plan amendments: the oracle audit is keyed by the

2026-07-16 — M6 synthesis, two plan amendments: the oracle audit is keyed by the lifeboat's manifest hash (audit/oracle-<manifest12>.json), not the plan's wall-clock <ts> (no timestamp ever enters a lifeboat artifact); and _provenance.json is never mutated post-pack — each synthesis artifact self-records its mode (deterministic|delegated) instead of the plan's "_provenance records which" (the commit marker stays immutable). Synthesis outputs (principles, press-release, audit/) join the lessons files outside manifest_sha256.