During May 2026, this developer delivered a unified callback interface for tool responses in the elevenlabs/packages React Native SDK. They consolidated two separate callbacks into a single onAgentToolResponse function, enabling consumers to access both summary and full payload data through one streamlined interface. The implementation leveraged TypeScript union types and event-driven design to differentiate payloads using a full_tool_result flag, reducing integration complexity and boilerplate for SDK users. Their work focused on improving developer experience and SDK robustness, with no critical bugs reported. Collaboration included co-authoring key changes, utilizing skills in API integration, React Native, and TypeScript throughout the process.