Celso focused on enhancing developer documentation for the cloudflare/playwright and cloudflare/playwright-mcp repositories, targeting onboarding and integration workflows. Over two months, he updated Markdown-based guides to clarify the experimental status of Playwright on Cloudflare Workers and detailed its browser rendering compatibility. For the MCP project, Celso improved server configuration documentation, introduced a generic server URL placeholder, and created a GIF demonstration to illustrate integration steps with Claude Desktop. He also simplified VSCode setup instructions, reducing friction for new users. His work emphasized technical writing and documentation skills, resulting in more accurate, maintainable, and user-friendly onboarding materials for both projects.