Where this fits In the channel's exploration of OpenAI's Codex as an “operating system for knowledge work”, agent.md files belong to the practical playbook: rather than restating instructions each time, you capture the real work you hand off so the agent can carry it out — and what you hand off can be turned into reusable skills[^80173b13]. The broader playbook the material recommends is to start with a hard recurring process, teach the agent the actual work, and keep distilling your hand-offs into skills[^80173b13]. - agent.md files are part of the playbook for working with Codex: teach the agent the real work by handing off what you know.- The material connects hand-offs to skills — what you turn over to the agent becomes reusable capability.- The recommended starting point is a hard recurring process, not a toy task.