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modelcontextprotocol / csharp-sdk Public

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Add Extensions support to ClientCapabilities and ServerCapabilities (SEP-2133)#1292

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Copilot wants to merge 6 commits intomainmodelcontextprotocol/csharp-sdk:mainfrom

copilot/add-mcp-extensions-supportmodelcontextprotocol/csharp-sdk:copilot/add-mcp-extensions-supportCopy head branch name to clipboard

Conversation Commits6 (6)Checks Files changed

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Add Extensions support to ClientCapabilities and ServerCapabilities (SEP-2133)#1292
Copilot wants to merge 6 commits intomainfrom
copilot/add-mcp-extensions-support

Commits

Commits on Feb 17, 2026

Initial plan
Copilot
committed
Add MCP Extensions support to ClientCapabilities and ServerCapabilities

Copilot
and
stephentoub
committed
Add dedicated Extensions constants to Experimentals class

Copilot
and
stephentoub
committed
Add clarifying documentation for shared diagnostic ID

Copilot
and
stephentoub
committed
Add serialization roundtrip tests for Extensions property and update message

Copilot
and
stephentoub
committed
Split capabilities tests into separate files by type

Copilot
and
stephentoub
committed

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