Claude Code adds AGENTS.md support in v2.1.277, adopting the open agent standard
MicahBerkley · x · 2026-09-19
Anthropic has added AGENTS.md support to Claude Code in version 2.1.277: when no CLAUDE.md is present in a folder, Claude will check for and use AGENTS.md as project instructions, toggleable via /config. This moves coding agents toward a shared project-instruction standard, letting multiple AI tools collaborate on the same repositories. Commenters call it 'code cleanup on a global scale' and see standardization as inevitable.
Related event: Claude Code Adds AGENTS.md Support Starting with v2.1.277(33 posts)→
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