OSS-first docs
These docs teach the open system first: contracts, generated surfaces, runtimes, governance, and incremental adoption. Studio shows up as the operating layer on top, not as the source of truth.
Provider-backed knowledge starts from the same `KnowledgeSpaceSpec` and `KnowledgeSourceConfig` surfaces, then adds explicit provider delta and mutation governance evidence before runtime sync begins.
Gmail and Google Drive ingestion should persist `ProviderDeltaSyncState` per source so leases, cursors, webhook channel expiry, provider event IDs, dedupe/idempotency keys, replay checkpoints, and tombstones survive retries.
External mutations should route through `knowledge.mutation.evaluateGovernance` or `@lssm-tech/lib.knowledge/governance` so dry-runs, approval refs, idempotency keys, audit evidence, and outbound-send gates are recorded before provider writes happen.