AGENTS.md as a project's instructions
Write a project's standing instructions once in AGENTS.md and every chat using the project follows them, with folder-level files adding rules where they apply.
The open standard behind it
What it includes
Bring a repository's rules along
A GitHub repository with an AGENTS.md at its root imports as a project with every file intact, and a new project starts with one written.
Split long rules into files
Mention another file as @path and its text is pulled in, so instructions stay short and a shared piece lives in one place.
Rules that follow the folder
An AGENTS.md inside a folder applies once the agent works on a file there, so specialist rules stay out of unrelated chats.
Pin a project into every chat
Pin a project and it loads in every chat you start, so its instructions apply without picking it again, and an admin can pin it for the team.