Unverified50% confidenceFactExact time

Codex reads AGENTS.md layer by layer from the project root directory down to the working directory; Claude Code also reads it when there is no CLAUDE.md (v2.1.277 and above).

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

10/14/2026

First Seen

Valid until: 1/12/2027

Sources

Usage Limits on AI Coding Tools Are Becoming a Production Dependency

Related Entities

Codexproduct Claude Codeproduct AGENTS.mdconcept CLAUDE.mdconcept

Related Claims

UnverifiedTools such as Codex/Claude Code typically recognize instructions in AGENTS.md, CLAUDE.md, or README.80% similar UnverifiedBoth Grok Build and Codex read AGENTS.md as the project rules file, while Claude Code primarily reads CLAUDE.md.80% similar UnverifiedClaude Code's official documentation explicitly states that it reads CLAUDE.md, not AGENTS.md.75% similar

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