A playbook is what a prompt becomes when you stop storing it in your head. It lives in a workspace, carries your context, your process, and your standards, and agents read it automatically when they enter — nothing pasted, nothing re-explained. I used to have a very good prompt. Twelve hundred words, carefully tuned. My company name, my products, my customer segments, my communication style, the things I care about and the things I don't. I could drop it into any AI session and get usable output in seconds. I also retyped it — or pasted it from a note that was never quite right for today's task — every single session. The prompt was good. The location was wrong. What a Prompt Is (and What It Can't Do) A prompt lives wherever you stored it. Usually that means a note in your project management tool, a sticky in a doc, or the back of your memory. You paste it in when you remember, adapt it for the task at hand, and when the session ends, it's gone. The next session starts clean. This is not a model problem.…