Anthropic adds support for the AGENTS.md instructions spec to Claude Code; OpenAI contributed AGENTS.md to the Agentic AI Foundation last year (Thomas Claburn/The Register)
Anthropic has added support for the AGENTS.md instructions specification to Claude Code, a move that surprised the developer community. This specification, which helps pass instructions to AI agents, was contributed by OpenAI to the Agentic AI Foundation last year. This integration by Anthropic is seen as a relief for developers, addressing compatibility issues between rival AI mechanisms.
This marks the first time Anthropic has supported a rival's mechanism for AI agent instructions, unlike its previous independent development approach.
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PublishedOffset at this time: UTC+0Sep 19, 2026, 01:40 UTC
IngestedOffset at this time: UTC+0Sep 19, 2026, 02:00 UTC
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Thomas Claburn / The Register:
Anthropic adds support for the AGENTS.md instructions spec to Claude Code; OpenAI contributed AGENTS.md to the Agentic AI Foundation last year — Devs cheer relief from compatibility headache — Anthropic on Friday surprised the developer community by supporting rival OpenAI's mechanism for passing marching orders to AI agents.