Simon Willison personal blog
I ported JustHTML from Python to JavaScript with Codex CLI and GPT-5.2 in 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 …
- Points
- 278
- HN comments
- 145
- Submissions
- 1
- Cited by
- 6 commenters
Software EngineeringAI & Machine Learning2025
On Hacker News
| Submitted | Title on HN | Points | Comments |
|---|---|---|---|
| Dec 16, 2025 | I ported JustHTML from Python to JavaScript with Codex CLI and GPT-5.2 in hours by pbowyer | 278 | 145 |
Cited in comments
Linked from 13 Hacker News comments by 6 different people, from Dec 2025 to Sep 2026.
Most recent:
- simonw · Sep 5, 2026
- throwaway2037 · May 31, 2026
- simonw · Feb 12, 2026
- gorkaerana · Jan 16, 2026
- theshrike79 · Jan 12, 2026
- simonw · Jan 11, 2026
