Simon Willison (@simon@simonwillison.net)
You can try that out yourself by launching a Codespace using this link:
https://codespaces.new/simonw/codespaces-llm?quickstart=1
Notes on how I got this working: https://simonwillison.net/2025/Aug/13/codespaces-llm/ - plus a detailed TIL on using devcontainer.json to configure Codespaces: https://til.simonwillison.net/github/codespaces-devcontainers