The remaining task descriptions implied that downstream concerns
(StorageIdentityProvider, irpc service layer, agent services, multi-node
deployment) already exist. Updated to clearly distinguish:
- spec-update-server: Phase 1 ships ConfigIdentityProvider, not irpc auth
- spec-update-call-protocol: Phase 1 is local dispatch only; irpc and remote
dispatch are contracted for later. Agent services are downstream concerns.
- spec-update-overview: Note which crates exist now vs which are Phase 2+ contracts
- review-spec-foundation: Add phase boundary check to acceptance criteria