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typescript-sdk/.changeset/deprecate-client-identity-accessors.md
Felix Weinberger 1823aae891
 Implement MCP 2026-07-28 (#2286) 
Co-authored-by: Matt <77928207+mattzcarey@users.noreply.github.com>
Co-authored-by: Konstantin Konstantinov <KKonstantinov@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
2026-06-26 14:01:10 +01:00

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@modelcontextprotocol/server
patch

Deprecate Server.getClientCapabilities(), Server.getClientVersion() and Server.getNegotiatedProtocolVersion() in favor of the per-request handler context: on 2026-07-28 requests the validated _meta envelope carries the client's identity (ctx.mcpReq.envelope), and instances serving that revision through createMcpHandler are backfilled per request so the accessors keep answering. Behavior on 2025-era connections is unchanged; the accessors remain functional.