Jon focused on improving documentation reliability for the fastify/fastify repository during December 2025. He addressed a critical issue by updating a broken JSON Schema documentation link, ensuring developers could access the most current resources. Using Markdown and applying technical writing skills, Jon validated the new documentation path and updated related references to prevent future regressions. He adhered to established commit and message conventions, aligning his work with the project’s documentation quality standards. While no new features were introduced, Jon’s targeted fix enhanced the maintainability and usability of the documentation, reducing potential user support needs and supporting ongoing developer productivity.