Worked on the mastra-ai/mastra repository to enhance the reliability and compatibility of the CoreToolBuilder, focusing on structured output support for v2 models. Addressed a bug that previously allowed the schema compatibility layer to strip tool schemas, ensuring that model-specific structured outputs and constraints are preserved. Introduced validation tests to confirm that enums and input transformations are correctly handled, which reduces schema-related regressions and improves downstream developer experience. Utilized TypeScript and full stack development skills, with an emphasis on robust testing practices. These changes improved model capability detection and maintained tool schema integrity across evolving model versions and configurations.