During October 2025, Sarity enhanced the vercel/ai repository by updating its documentation to recommend GPT-5 over GPT-4 for tool calling, reflecting the latest advancements in AI integration. Sarity focused on technical writing and documentation using Markdown, ensuring that guidance aligned with current model capabilities to reduce integration risks and future-proof the project. The work included adding background and summary sections to improve onboarding and ongoing maintenance for developers. By maintaining clear versioned documentation and explicit commit traceability, Sarity’s contribution provided depth in both technical accuracy and maintainability, although the scope was limited to documentation without direct bug fixes.