# Anthropic decides to support OpenAI's markdown instructions spec

<https://www.theregister.com/ai-and-ml/2026/09/18/anthropic-decides-to-support-openais-markdown-instructions-spec/5297588>

- Host: [theregister.com](https://links.thingelstad.xyz/hosts/theregister.com/)
- Saved: September 21, 2026 (2026-09-22T00:57:56Z)
- Record: https://links.thingelstad.xyz/links/121e1e6235df/
- JSON: https://links.thingelstad.xyz/links/121e1e6235df.json

## What Jamie wrote

I get trying to hold onto `CLAUDE.md` as long as possible but I sure am happy to just use `AGENTS.md` everywhere now.

## Facts

- Kind: [Page](https://links.thingelstad.xyz/kinds/page/)

## Appears in

- [WT351: WT351 — Attention Is The Scarce Part](https://weekly.thingelstad.com/archive/351/), Briefly

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## Elsewhere

- Wayback Machine: https://web.archive.org/web/*/https://www.theregister.com/ai-and-ml/2026/09/18/anthropic-decides-to-support-openais-markdown-instructions-spec/5297588