MCP specification: 2025-06-18 revision published
The Model Context Protocol published a new dated spec revision, 2025-06-18. The release note itself lists no changes — it points to a separate changelog page — and warns that SDKs will move to this revision on their own schedules, so clients and servers will be running mixed spec versions and relying on the protocol's version negotiation for compatibility.
PUBLISHED2025-06-18
OBSERVED2026-08-11
AGE1y
SOURCES1
- New dated spec revision
2025-06-18cut. - Concrete changes are not in the release note; they live in the linked
2025-06-18changelog on modelcontextprotocol.io. - SDK adoption is explicitly staggered — the prior revision stays in use indefinitely.
- Cross-version interop is handled by the spec's client/server version negotiation (backwards and forwards compatible).
COMMUNITY
No curated reactions recorded for this event. Facts and takes are kept in separate layers — community context is added by hand, never blended into the record above.