Synthesis Skills Manager

Version 2.7.0 (2026-09-04) deduplicates historical payloads in a SQLite content-addressed archive. Immutable per-version manifests preserve paths, types, modes and metadata; restoration creates independent files. SHA-256 validation covers every payload and manifest, beyond database structure checks. The complete database, including page overhead, stays within the unchanged 512 MiB budget. A verified candidate replaces the store atomically; legacy trees move before deletion only after their complete recovery is verified. Interrupted retirement resumes against the committed version manifest. The archive-aware standalone guardian and supervisor are verified before migration or native refresh. Source integrity includes permissions, not just bytes.

Version 2.6.3 (2026-09-03) makes synchronous historical-cache verification wait up to 120 seconds for the shared transition lock. This covers a complete budgeted historical-root restore and serializes an onboarding completion check behind an ordinary background guardian pass instead of reporting a false release collision. Watch and --once work remain nonblocking; persistent publisher contention still fails closed after the bounded wait.