Developed and delivered the Unified Tools API for Gemini 3+ in the vercel/ai repository, enabling seamless integration of built-in tools and custom function calls within a single tools array. Leveraging TypeScript and full stack development skills, the work introduced server-side context propagation, allowing tool context to circulate across multiple conversation turns and improving multi-turn accuracy. The implementation maintained backward compatibility with Gemini 2.x models by preserving legacy behavior and adding compatibility checks. This API development effort established a scalable foundation for future tool integrations, reducing developer overhead when composing tool-powered interactions and enhancing the flexibility of Gemini model workflows.