Plans the Federation v1 mission: cross-instance data federation between Mosaic Stack gateways with asymmetric trust (home gateway sees blended A+B at session time; work gateway sees only its own tenants), mTLS via X.509 / Step-CA for auth, multi-tenant RBAC with no cross-user leakage, and no data persistence across the boundary. - docs/federation/PRD.md — 16-section product requirements (v1 locked) - docs/federation/MILESTONES.md — 7-milestone decomposition with per-milestone acceptance test tables across unit/integration/E2E layers - docs/federation/MISSION-MANIFEST.md — mission scope, success criteria, milestone table linked to issues #460-#466 - docs/federation/TASKS.md — FED-M1 decomposed into 12 tasks; M2-M7 deferred to per-milestone planning to avoid speculative decomposition Refs: #460 #461 #462 #463 #464 #465 #466 Co-Authored-By: Claude Opus 4.7 <[email protected]>