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BREAKING CHANGE: This SDK now requires Zod v4.0 or later. - Remove all Zod v3 imports, types, and runtime detection - Simplify `SchemaOutput<S>` to use direct indexed access `S['_zod']['output']` - Remove `zod-to-json-schema` dependency (z4-mini has built-in JSON schema support) - Add closure-based handlers for prompts and tools to eliminate runtime type casts - Simplify `executeToolHandler` and `handleAutomaticTaskPolling` - Remove v3 test blocks from integration tests
- Create mapping.ts as single source of truth for method-to-schema mappings - Remove resultSchema parameter from Protocol.request() - now derived from method name - Add HandlerResultTypeMap for typed setRequestHandler return values - Update Client/Server setRequestHandler to use method-specific result types - Remove schema arguments from all call sites (examples, tests) - Fix test method names to use real MCP methods (ping, tools/call, etc.) BREAKING CHANGE: Protocol.request() no longer accepts a resultSchema parameter. The result type is now automatically inferred from the method name.
…args - Update Server/Client setRequestHandler to use HandlerResultTypeMap[M] - Remove schema arguments from all this.request() calls - Clean up unused schema imports
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Summary
mapping.tsas single source of truth for method → schema mappingsresultSchemaparameter fromProtocol.request()- now derived from method nameHandlerResultTypeMapfor typedsetRequestHandlerreturn valuesClientandServerrequest methodsBreaking Changes
Protocol.request()no longer accepts aresultSchemaparameterClient.callTool()no longer accepts aresultSchemaparameterTest plan
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