AGENTS.md is a text file in a project folder that tells AI coding agents how to work in that project.
Example
The file says: “Run tests with npm test, write comments in English, never change the /config folder.”
For pros
AGENTS.md is an open, simple Markdown format with no required fields that many coding tools read. It complements the README with notes for agents. For recurring tasks, skills (SKILL.md) are a good addition.