Unverified50% confidenceDecision RuleExact time
If both CLAUDE.md and AGENTS.md exist simultaneously, Claude Code gives precedence to CLAUDE.md, and the contents of AGENTS.md are ignored
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/18/2026
First Seen
Valid until: 12/17/2026
Sources
Related Entities
Related Claims
UnverifiedWhen a CLAUDE.md file is not present in a folder, Claude automatically looks for and uses AGENTS.md as the source of project instructions.68% similarUnverifiedClaude Code's compatibility strategy is to read CLAUDE.md first and fall back to AGENTS.md when it is absent.67% similarUnverifiedClaude Code does not support the agents.md standard and only recognizes the claude.md format, while tools such as Cursor, Codex, and Builder.io already support the universal agents.md standard.64% similarUnverifiedIf a developer has already prepared an AGENTS.md for other AI tools, there is no need to additionally create a CLAUDE.md, as Claude Code can directly reuse it64% similarUnverifiedWith the exception of Claude Code, which uses its own claude.md, the vast majority of Agent tools including Cursor, Gemini CLI, Windsurf, and Aider follow the AGENTS.md standard.63% similar
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