OpenAI has already adopted Agent Skills:

- https://community.openai.com/t/skills-for-codex-experimental...

- https://developers.openai.com/codex/skills/

- https://github.com/openai/skills

- https://x.com/embirico/status/2018415923930206718

Yeah but this seems like a bolt-on and not something they train their model to understand at the token level like how they do tool calls. Maybe Anthropic has a token-level skills support (e.g. <SKILL_START>skill prompt<SKILL_END>).