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Motivation and Context
TypeScript projects using moduleResolution: "bundler" (or "node16") cannot resolve type declarations for subpath imports like @modelcontextprotocol/sdk/types or @modelcontextprotocol/sdk/shared/transport. This is because the exports map lacks "types" conditions, so TypeScript doesn't know where to find .d.ts files for these subpaths.
How Has This Been Tested?
Verified that a TypeScript project with moduleResolution: "bundler" can resolve @modelcontextprotocol/sdk/types, @modelcontextprotocol/sdk/shared/transport, and other subpath imports without needing tsconfig.json paths workarounds.
Breaking Changes
None. Adding "types" conditions is purely additive — it enables TypeScript to resolve types that previously required manual paths configuration. Existing setups using typesVersions or explicit paths will continue to work.
Types of changes
Checklist
Additional context
The "types" condition is the modern replacement for "typesVersions" and is recommended by TypeScript for packages using exports. Only the named subpaths (., ./client, ./server) and the catch-all (./) needed updating — the ./validation/ and ./experimental/* entries are covered by the ./* catch-all.