Expired60% confidenceFactTime unknown
The claude.md file (or its open-source equivalent agents.md) is applicable to tools such as Claude Code, OpenCode, Zest, Cursor, and Codex.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
6/2/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 8/31/2026(expired)
Sources
Related Entities
Related Claims
UnverifiedDifferent tools use different rule file names: Claude uses CLAUDE.md, while tools such as OpenCode use AGENT.md.77% similarUnverifiedClaude Code uses the CLAUDE.md file to carry project-level rules, while Codex uses the agents.md file.76% similarUnverifiedThe claude.md file is the core configuration file for Claude Code projects and should include the tech stack, project structure, code style conventions, and prohibited items.73% similarUnverifiedplanning-with-files claims, through the SKILL.md standard, to interoperate with 60+ agent tools, including Claude Code, Codex CLI, Cursor, Kiro, and OpenCode.73% similarUnverifiedOpenCode's init command writes to an AGENTS.md file, which is nearly identical to Claude Code's CLAUDE.md mechanism.72% similar
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