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base repository: modelcontextprotocol/go-sdk
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head repository: modelcontextprotocol/go-sdk
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compare: issue-193
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  • 1 commit
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Commits on Aug 20, 2025

  1. mcp: replace type struct{} with any for user-defined fields 

    This change adopts a clearer convention:
- any is used for fields where the structure is defined by
the client or server implementer.
- struct{} is reserved for placeholder fields to be defined
by the MCP spec in the future.

The "Experimental" fields in "ClientCapabilities" and
"ServerCapabilities" now use "map[string]any". This allows
clients and servers to negotiate custom capabilities that contain
complex data, rather than being restricted to a simple on/off flag.

The "Metadata" field in "CreateMessageParams" was also changed to
"any" to properly serve its purpose as a flexible container for
server-defined data.
    @h9jiang
    h9jiang committed Aug 20, 2025
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