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What is an AI agent file?
An AI agent file is a plain-text file (.md) that contains everything needed to turn your AI tool into a personal agent: an identity, a memory, safety rails and a 24/7 work rhythm. You paste it into your tool: it installs itself, without a single line of code.
See the 3 ready-to-install agentsidentity: your agent
memory: on
guardrails: on
schedule: 24/7
ready
How it works in practice
The file is written for your AI, not for you. When you paste it into a tool like Claude Code, Codex or Cowork, the tool reads the instructions and runs the installation itself: it creates the files, sets up the memory and starts the agent. You answer two or three questions (your agent's name, its working language) and click “Authorize” when your browser asks. That's it.
Agent file vs prompt vs custom-built agent
A prompt
a one-off instruction. You type it, the AI answers, done. Nothing is installed, nothing keeps running.
A custom-built agent
a program coded from scratch (frameworks like LangChain). Powerful, but you need to be a developer or hire one.
An agent file
the bridge: the power of a 24/7 agent, with the installation effort of a copy-paste. Your AI tool does the developer work.
What's inside the file
The agent's identity: its role, personality and how it talks to you.
Its memory: how it writes down what it learns so it remembers across sessions.
Its guardrails: what it is never allowed to do without your approval.
Its rhythm: the tasks it runs continuously, even while you sleep.
The full install manual for your AI tool, which executes every step for you.
How to install one
Three moves: download the file, open it and copy everything, paste it into your AI tool and press Enter. The guided install takes about two minutes. The step-by-step detail is in our install guide.
See the install guidenever used an agent?
Start free.
The beginner's step-by-step install guide: an AI walks you through it in your language, straight to your inbox.
Frequently asked questions
No. The file is designed so your AI tool runs every command itself. You never touch the terminal: copy, paste, answer three questions.
Tools with terminal access: Claude Code, Codex or Cowork. If you already use one of them, you have everything you need.
The file is plain text: everything it does is readable before installing, and a guardrail blocks destructive commands. The agent never does anything irreversible without your approval.
At AfterHours: €1.99 to €3.99, one-time payment. No subscription: the file is yours.
ChatGPT answers when you talk to it. An installed agent also works when you don't: it has persistent memory, scheduled tasks, and runs 24/7 on your computer.