AGENTS.md is a common format for providing instructions to AI coding agents working on a project. Essentially a README file for agents, it has no required fields or formatting other than Markdown, relying on the ability of LLM-based coding agents to interpret human-written, human-readable guidance. Typical uses include tips on using tools in the coding environment, testing instructions and preferred practices for managing commits. While AI tools support various methods for context engineering, the value of AGENTS.md lies in creating a simple convention for a file that acts as a starting point.