Simon Willison’s Weblog

London 2.0 RC 5, Wednesday May 3rd. Last one was a ton of fun, with some great demos.

Posted 18th April 2006 at 2:10 pm

Recent articles

I ported JustHTML from Python to JavaScript with Codex CLI and GPT-5.2 in 4.5 hours - 15th December 2025
JustHTML is a fascinating example of vibe engineering in action - 14th December 2025
OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025

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