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Title: Protocol types for 2026-07-28: superset monolith, committed per-version packages, and wire-method maps by maxisbey · Pull Request #2849 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: Protocol types for 2026-07-28: superset monolith, committed per-version packages, and wire-method maps by maxisbey · Pull Request #2849 · modelcontextprotocol/python-sdk

X Title: Protocol types for 2026-07-28: superset monolith, committed per-version packages, and wire-method maps by maxisbey · Pull Request #2849 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - Protocol types for 2026-07-28: superset monolith, committed per-version packages, and wire-method maps by maxisbey · Pull Request #2849 · modelcontextprotocol/python-sdk

Open Graph Description: Overview Three type sets: mcp.types.v2025_11_25 — generated from the 2025-11-25 schema; serves every version through 2025-11-25 mcp.types.v2026_07_28 — generated from the 2026-07-28 (draft) schema...

X Description: Overview Three type sets: mcp.types.v2025_11_25 — generated from the 2025-11-25 schema; serves every version through 2025-11-25 mcp.types.v2026_07_28 — generated from the 2026-07-28 (draft) schema...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2849

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Protocol types for 2026-07-28: superset monolith, per-version package…https://github.com/modelcontextprotocol/python-sdk/pull/2849/commits/30c9eeb25fab01fd8d23cc322bad9916f16c9683
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Drop dead OpenWireModel; add --frozen to codegen invocations; tighten…https://github.com/modelcontextprotocol/python-sdk/pull/2849/commits/0c6211ed5cf9082e3880ab14bd3734ea02e76375
0c6211ehttps://github.com/modelcontextprotocol/python-sdk/pull/2849/commits/0c6211ed5cf9082e3880ab14bd3734ea02e76375
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Wire per-version validation into ServerRunnerhttps://github.com/modelcontextprotocol/python-sdk/pull/2849/commits/73f1572886e1055d85bfe323a95d779dee94fedb
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June 15, 2026 20:53https://github.com/modelcontextprotocol/python-sdk/pull/2849#event-26778264630
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Serialize spec results through the per-version surface schemahttps://github.com/modelcontextprotocol/python-sdk/pull/2849/commits/b952bdf7d9e2144f23c7fb464a3ab90ea35a66c7
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Permit null in v2026 JSONValue; export all Tasks types from mcp.typeshttps://github.com/modelcontextprotocol/python-sdk/pull/2849/commits/a86fc77a142786b958751dfc18e6fc361e95bb6c
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Drop stale superset-leniency note from ElicitResult.content docstring #2884 https://github.com/modelcontextprotocol/python-sdk/pull/2884
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Resolve protocol version per request and expose it as ctx.protocol_version #2886 https://github.com/modelcontextprotocol/python-sdk/pull/2886
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Multi-version protocol types: complete per-version model packages (candidate 1/3) #2843 https://github.com/modelcontextprotocol/python-sdk/pull/2843
Multi-version protocol types: per-version fact tables (candidate 2/3) #2844 https://github.com/modelcontextprotocol/python-sdk/pull/2844
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Backwards compatibility & version negotiation #2892 https://github.com/modelcontextprotocol/python-sdk/issues/2892
SEP-2106 — JSON Schema 2020-12 + structuredContent #2903 https://github.com/modelcontextprotocol/python-sdk/issues/2903
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Pass json-schema-ref-no-deref conformance scenario (SEP-2106) #2924 https://github.com/modelcontextprotocol/python-sdk/pull/2924
Work through the spec-conformance gaps recorded by the interaction suite #2999 https://github.com/modelcontextprotocol/python-sdk/pull/2999
Implement SEP-1724: Extensions #1555 https://github.com/modelcontextprotocol/python-sdk/issues/1555
Implement SEP-1865: MCP Apps - Interactive User Interfaces for MCP #2791 https://github.com/modelcontextprotocol/python-sdk/issues/2791
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