Simon Willison’s Weblog

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Monday, 15th December 2025

2025 Word of the Year: Slop. Slop lost to "brain rot" for Oxford Word of the Year 2024 but it's finally made it this year thanks to Merriam-Webster!

Merriam-Webster’s human editors have chosen slop as the 2025 Word of the Year. We define slop as “digital content of low quality that is produced usually in quantity by means of artificial intelligence.”

# 5:27 pm / definitions, ai, generative-ai, slop, ai-ethics

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

Visit 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 night, purely out of curiosity, I decided to try porting JustHTML from Python to JavaScript with the least amount of effort possible, using Codex CLI and GPT-5.2. It worked beyond my expectations.

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2025 » December

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