diff --git a/multiplayer-next.md b/multiplayer-next.md
index 174861c4..5e4bf741 100644
--- a/multiplayer-next.md
+++ b/multiplayer-next.md
@@ -33,7 +33,7 @@ product policy are in [`docs/MATCHMAKING.md`](docs/MATCHMAKING.md).
   provider-portability ADR ([ADR-001](docs/ADR-001-matchmaking-platform.md));
   measurable launch SLOs are defined in
   [MATCHMAKING-SLOs.md](docs/MATCHMAKING-SLOs.md).
-- [ ] Publish versioned OpenAPI/WebSocket contracts, stable IDs, legal state
+- [x] Publish versioned OpenAPI/WebSocket contracts, stable IDs, legal state
   transitions, revisions and idempotency semantics ([v1 contracts](server/contracts/v1/)).
 - [ ] Add PostgreSQL queue ownership/active-participation fences, durable
   domain migrations/outbox and Redis indexes/TTLs; lost Redis writes must not