Worked on the fastify/fastify repository to enhance the clarity and professionalism of the Plugin Testing Guidelines documentation. Focused on technical writing and documentation skills, the contribution involved correcting a grammatical error in Write-Plugin.md to remove ambiguity for plugin authors. The update was implemented using Markdown and aligned with the repository’s established documentation standards, supporting more efficient onboarding for new contributors. The work emphasized traceability and accountability through a clear commit message and sign-off, ensuring the change could be easily tracked. No new features were added, but the targeted bug fix improved the overall quality and usability of the documentation.