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I Spent a Weekend Migrating My MCP Server to the New Spec. Here's What Hurts.

This story is from 2026-10-19. It is preserved in the archive; the latest stories are on the live feed.

Okay so. The MCP spec got a major update on July 28, and if you built anything on the old version, you're probably staring at your code right now going "wait, what do I actually do here?" I was in that spot. My server had a session store, a WebSocket connection, an initialize handler that I'd copy-…

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  1. 2026-10-19 10:57 · DEV Community — AI
    I Spent a Weekend Migrating My MCP Server to the New Spec. Here's What Hurts.

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