Tip: Maintain Both AGENTS.md and CLAUDE.md for Cross-Tool Agent Portability
Codex Knowledge Base·medium signal
Codex CLI reads `AGENTS.md` as its project-level instruction file while Claude Code reads `CLAUDE.md`; teams running both should keep the two in sync (or symlink) so agent guidance is honored regardless of which tool a contributor uses. With Devin Desktop now hosting Codex, Claude Agent, OpenCode, Junie, and Gemini CLI side by side via ACP, instruction-file fragmentation is a real risk. Standardize the canonical content in one file and mirror it to avoid drift between agents.