AGENTS.md Emerges as Vendor-Neutral Standard to Replace Fragmented AI Context Files

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Developers working across multiple AI coding tools have long had to maintain separate context files like CLAUDE.md, .cursorrules, and .windsurfrules for each agent, creating duplication and drift. AGENTS.md was proposed by Sourcegraph's Amp team as a single, vendor-neutral alternative, and has since gained backing from OpenAI, Google, and the Linux Foundation's Agentic AI Foundation. Over 28 tools and 60,000 open-source repositories reportedly support the format, though those figures are approximate and unaudited. CLAUDE.md remains relevant, particularly for Claude Code users, as native AGENTS.md support in Anthropic's tool is unconfirmed by official documentation. A practical migration path involves renaming CLAUDE.md to AGENTS.md and creating a symlink, allowing both legacy and modern tools to function without disruption.

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