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May 28, 2026
The next MCP spec drops session IDs, removes the initialize handshake, and turns Extensions, Tasks, and MCP Apps into first-class citizens. It's the largest revision since launch — and it contains breaking changes. Here's every change, why it exists, and what you have to migrate before July 28, 2026.

April 14, 2026
MCP shipped with JSON-RPC over HTTP. That works beautifully for demos and small integrations — but it crashes into enterprises that run gRPC everywhere. Google is contributing a gRPC transport to MCP, with pluggable transports landing in the SDK. Here's what actually changes, what doesn't, and when the switch is worth making.