BREAKING: starting today in version 2.1.277, Claude Code gains AGENTS.md support. From Thariq from Anthropic: if “there is no CLAUDE.md in a folder, Claude will check for and use AGENTS.md. You can toggle this behavior in /config.”
agents.mdAGENTS.mdAGENTS.md is a simple, open format for guiding coding agents. Think of it as a README for agents.