Anthropic's Claude Code, starting from version 2.1.277, has introduced support for AGENTS.md files. This new feature is built upon its mods mechanism, with the relevant source code now accessible to the public. By default, if a CLAUDE.md file is absent, Claude Code will automatically load AGENTS.md. Alternatively, users can utilize the /config command to switch settings, enabling them to load both files or opt to use only CLAUDE.md. AGENTS.md serves as a project description file tailored for AI Agents, a concept initially inspired by OpenAI Codex. This compatibility achievement effectively addresses the challenges of configuration synchronization in cross-tool collaboration, thereby lowering the entry barriers for teams already utilizing AGENTS.md.

Nevertheless, it is important to note that currently, the directories .agents/skills and .claude/skills remain distinct, and compatibility does not equate to full integration. Presently, mainstream AI coding tools are moving towards convergence in project instruction files, holding the potential to further diminish the costs associated with cross-tool migration.