Claude Code now falls back to OpenAI’s AGENTS.md instructions

Claude Code version 2.1.277 can now use OpenAI’s AGENTS.md instruction files when a repository has no Claude-specific instructions, reducing duplicated guidance for teams using multiple AI coding tools. Anthropic keeps CLAUDE.md,.claude/CLAUDE.md, and CLAUDE.local.md files authoritative when they exist, making the change a fallback rather than a replacement. Source

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