During November 2025, Adrian Pena focused on enhancing user guidance within the openai/codex repository by updating documentation to recommend GPT-5.1 Codex as the preferred model for coding tasks. Adrian revised the FAQ using Markdown, ensuring that users are directed toward the latest supported AI model. The work centered on clear, traceable documentation changes rather than code or bug fixes, emphasizing accuracy and alignment with product messaging. By leveraging strong documentation skills, Adrian improved the onboarding experience for developers seeking model recommendations. The scope was targeted and low-risk, reflecting a depth of attention to detail in maintaining up-to-date technical resources.