Instructions

AGENTS.md

AGENTS.md (Instructions) for coding agents: 2 sources, including docs and a guide for agents, and the files that show a project uses it.

Docs
Guide

Sources

agents.md (opens in a new tab)Docs · agents.md
Copilot repository instructions (opens in a new tab)Guide · docs.github.com/en/copilot/how-tos/configure-custom-instructions/add-repository-instructions

How agents detect AGENTS.md

Any of these in a repository tells an agent the project uses AGENTS.md. How signals work.

FileAGENTS.md
FileCLAUDE.md
File.github/copilot-instructions.md