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1h ago

Anthropic’s Claude Code Adds AGENTS.md Support

The update lets Claude Code fall back to a shared AGENTS.md file to ease cross‑tool setup and can be toggled in the model’s /config settings.

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Overview

  • Claude Code version 2.1.277 includes a built‑in agents‑md mod and the team published the mod’s source code on GitHub so the client can read AGENTS.md files.
  • By default Claude Code will use AGENTS.md only when no project‑level CLAUDE.md is present, and users can change that fallback or load both files through /config.
  • The change removes a common integration hurdle for teams that already use AGENTS.md, cutting the maintenance work of keeping separate project instruction files in sync.
  • The move drew a warm response from developers and peers online, and OpenAI Codex lead Tibo publicly congratulated Anthropic on adopting the standard.
  • AGENTS.md began in OpenAI’s Codex as a machine‑readable 'README for agents,' and while this step broadens cross‑vendor alignment it does not merge separate skill directories or fully unify agent conventions.