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Make the per-version wire packages private (mcp_types._v*) (#3191)

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Max 2026-07-27 22:16:48 +01:00 • committed by GitHub
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docs/migration.md
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@ -175,6 +175,11 @@ continues to re-export the type names at the top level, so `from mcp import Tool
unchanged. Only the `mcp.types` submodule and `mcp.shared.version` were removed. The
package's API reference is at [`mcp_types`](api/mcp_types/index.md).
The supported import surface is `mcp_types`, `mcp_types.jsonrpc`, `mcp_types.methods`, and
`mcp_types.version`. Underscore-prefixed submodules (`mcp_types._types`, and the generated
per-protocol-version packages `mcp_types._v2025_11_25` / `mcp_types._v2026_07_28`) are internal
validators with unstable class names; don't import from them.
**Why:** keeping the wire types in their own package lets tooling and lightweight clients
depend on the protocol schema without pulling in `httpx2`, `starlette`, `uvicorn`, and the
rest of the server/transport stack.