Worked on the thinking-machines-lab/tinker-cookbook repository to deliver comprehensive API documentation for the Tinker SDK, focusing on new exception classes and management methods for checkpoints and training runs. Applied skills in Python and API design to clarify usage patterns and improve the SDK’s usability for developers. Regenerated the reference documentation to ensure all recent API changes were accurately reflected, supporting better onboarding and ongoing maintenance. Emphasized clear, maintainable documentation and version control practices throughout the process. The work addressed developer experience by making the API more discoverable and easier to integrate, with a technical focus on documentation and Python development.