Claude Code adds AGENTS.md fallback for repositories shared across coding agents
Version 2.1.277 reads the open instruction format when CLAUDE.md is absent and previews Anthropic's coming mods system.
By Ryan Merket · Published
Primary source: X
Why it matters
AGENTS.md is becoming shared infrastructure for coding agents. Claude Code's support reduces duplicated repository rules, while the underlying mod previews deeper control over Anthropic's harness.
Anthropic added AGENTS.md support to Claude Code on September 18th, letting the coding agent read a repository's shared instruction file when it cannot find a Claude-specific CLAUDE.md.…
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