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1. Commits on Jul 29, 2026

   • Retire wording tied to pre-2.0 milestones (#3211)

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2. Commits on Jul 28, 2026

   • Serve v2 docs at the site root, with permanent per-major paths (#3176)

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   • Remove unused StreamableHTTPTransport.get_session_id() (#3205)

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   • Expose the middleware chain on MCPServer and stop sending unrequested change notifications (#3201)

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   • Fail fast on server-to-client requests in JSON-response mode instead of hanging (#3195)

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   • Remove unused mcpserver.exceptions.ValidationError (#3199)

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   • Gate log notifications on the per-request log-level opt-in at 2026-07-28 (#3198)

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3. Commits on Jul 27, 2026

   • Add mcp.types as a permanent alias for mcp_types (#3190)

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   • Stop answering cancelled requests (#3188)

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   • Split the registration request model from the registered-client record (#3181)

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

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4. Commits on Jul 26, 2026

   • Cache compiled output-schema validators on ClientSession (#3134)

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     jlowin

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     maxisbey

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5. Commits on Jul 25, 2026

   • Replace FileResource.is_binary with an encoding field (#3171)

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   • Narrow message_handler's parameter to notifications and exceptions (#3168)

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   • Remove the unused timeout parameter from OAuthClientProvider (#3165)

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   • Stop advertising MCP_* env vars for MCPServer settings; drop pydantic-settings (#3170)

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   • Remove the deprecated RFC7523OAuthClientProvider (#3169)

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   • Rename scopes= to scope= on the client-credentials OAuth providers (#3166)

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   • Remove Context.client_id (#3167)

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   • Make CacheConfig() the Client cache default and None the off switch (#3164)

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   • Isolate the stdio server's stdin and stdout from handler subprocesses (#3117)

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6. Commits on Jul 24, 2026

   • Serve the 2026-07-28 protocol over stdio: decide the era from the opening request (#3152)

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7. Commits on Jul 23, 2026

   • Align with spec #3002: optional clientInfo, serverInfo in result _meta (#3143)

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8. Commits on Jul 16, 2026

   • Add Streamable HTTP request body limits (#3095)

     Kludex

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9. Commits on Jul 14, 2026

   • Replace httpx and httpx-sse with httpx2 (#2972)

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     Kludex

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     maxisbey

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10. Commits on Jul 10, 2026

    • fix: reject trailing newline in tool-name and URI-template varname validation (#3076)

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      otiscuilei

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11. Commits on Jul 7, 2026

    • Add the client-side subscriptions/listen driver (#3047)

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12. Commits on Jul 6, 2026

    • Extend resolver DI to sampling and roots requests (#3049)

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13. Commits on Jul 2, 2026

    • Make client-side cancellation work over the 2026 transports (#3046)

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14. Commits on Jul 1, 2026

    • Harden the dual-era stream loop's era-lock and rejection semantics (#3040)

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15. Commits on Jun 30, 2026

    • Serve the 2026-07-28 era over stdio and other stream-pair transports (#3038)

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    • Document pydantic.ValidationError in client Raises sections (#3036)

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    • Serve subscriptions/listen with a pluggable event bus (SEP-2575) (#3035)

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    • Validate Mcp-Param-* headers server-side on the 2026-07-28 HTTP path (SEP-2243) (#3033)

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    • Add a client extension API (#3034)

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