During November 2025, Adrian Pena enhanced the openai/codex repository by updating its documentation to guide users toward the latest GPT-5.1 Codex model for coding tasks. Adrian focused on improving the FAQ section, using Markdown to clearly communicate the recommended model and ensure alignment with current product messaging. The work emphasized traceability, with all changes linked to a specific commit for transparency. No bugs were addressed, as the scope centered on low-risk documentation improvements rather than codebase modifications. Adrian’s contribution demonstrated proficiency in documentation practices and Markdown, delivering targeted guidance to users while maintaining a stable and well-documented repository.