Simon Willison’s Weblog

19 Eponymous Laws Of Software Development. I normally loathe anything that’s bundled up as a numbered list, but this one is actually really useful.

Posted 18th July 2007 at 12:29 am

Recent articles

Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult - 24th November 2025
sqlite-utils 4.0a1 has several (minor) backwards incompatible changes - 24th November 2025
Olmo 3 is a fully open LLM - 22nd November 2025

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