Middleware Support for McpServer (Fixes #1238)#1345

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ahammednibras8 wants to merge 22 commits intomodelcontextprotocol:mainfrom

ahammednibras8:feature/1238-mcp-server-middleware

Commits on Dec 26, 2025

style: standardize string literals and formatting in mcp.ts and add to gitignore
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feat: add and types for intercepting requests
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Commits on Dec 27, 2025

feat: add private helper method for handling server requests
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refactor: Wrap and handlers with and add new request-related types
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refactor: update context parameter type to
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feat: Add middleware support to McpServer's call handler
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feat: add method to register middleware functions
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feat: Prevent middleware registration after server connection or initial request processing
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test: Add middleware tests covering execution order, short-circuiting, and error handling
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feat: Prevent multiple calls to in middleware and add a corresponding test
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test: ensure middleware cannot be registered after server connection
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test: add real-world use case tests for middleware covering logging, authentication, and activity aggregation
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test: Add failure mode verification tests for mcpServer middleware and tool handler error propagation
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Commits on Dec 28, 2025