Developer Ports Cole Medin's Agentic Coding Workflow from Claude Code to Codex

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A developer experimented with adapting a popular agentic coding workflow, originally demonstrated by Cole Medin for Claude Code, to work with OpenAI's Codex in 2026. The original workflow organizes AI-assisted development through an 'AI Layer' in the repository, comprising a PRD, global rules, commands, and reusable Skills. The key adaptation involved converting Claude Code's Markdown-based slash commands into Codex Skills stored in a structured directory under .agents/skills/. A notable difference between the two platforms is that Codex loads only Skill metadata initially, reading full instructions only when needed, which helps conserve context window usage. The developer found that the core value of the methodology lay in its structured principles rather than any specific AI tool, making it transferable across platforms.

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