GoKawiilClaude Code adds fallback support for AGENTS.md configuration files
Anthropic's Claude Code tool will now read an AGENTS.md file when a project lacks a CLAUDE.md file. This lets developers who already use the AGENTS.md convention for agent instructions get compatible behavior from Claude Code without creating a duplicate configuration file.
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AGENTS.md has been gaining traction as a shared convention across different coding-agent tools, so honoring it reduces friction for teams juggling multiple AI coding assistants. It also signals Anthropic's willingness to support emerging cross-tool standards rather than locking developers into a proprietary-only configuration format.
- Claude Code now falls back to AGENTS.md when CLAUDE.md is absent.
- This eases interoperability for teams using multiple AI coding agents.
- Reflects growing standardization around AGENTS.md as a shared agent config format.
Source: code.claude.com, 2026-09-18
Published there as: “Claude Code now reads AGENTS.md if there is no Claude.md”
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