MCP 2026-07-28 removes protocol-level sessions, the required initialization handshake, and Mcp-Session-Id. Before deleting those code paths, find the application state they were hiding. This tutorial builds a dependency scanner, classifies each match by migration risk, and turns the results into a staged rollout checklist.
This is a static audit, not proof that a deployment is compatible. It finds likely legacy assumptions; you still need runtime tests across clients, servers, gateways, and replicas.
What changed?
The official MCP 2026-07-28 changelog makes several changes that affect production architecture:
Mcp-Session-Id is removed from Streamable HTTP.
