OpenAI aren't talking about it yet, but it turns out they've adopted Anthropic's brilliant "skills" mechanism in a big way

Skills are now live in both ChatGPT and their Codex CLI tool, I wrote up some detailed notes on how they work so far here: simonwillison.net/2025/Dec/12/

0

If you have a fediverse account, you can quote this note from your own instance. Search https://fedi.simonwillison.net/users/simon/statuses/115709204111716831 on your instance and quote it. (Note that quoting is not supported in Mastodon.)