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@h4ckernews@mastodon.social · 2 weeks ago

I ported JustHTML from Python to JavaScript with Codex CLI and GPT-5.2 in hours

https://simonwillison.net/2025/Dec/15/porting-justhtml/

#HackerNews #JustHTML #Codex #GPT5 #Programming #JavaScript #Python

Simon Willison’s Weblog

I ported JustHTML from Python to JavaScript with Codex CLI and GPT-5.2 in 4.5 hours

I wrote about JustHTML yesterday—Emil Stenström’s project to build a new standards compliant HTML5 parser in pure Python code using coding agents running against the comprehensive html5lib-tests testing library. Last …

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