A quote from Geoffrey Huntley
Simon Willison’s Weblog
Newsletter
13th October 2026
If the agent isn't using my diagnostics library, I could introspect and update AGENTS.md, but there's still a delta, and it'll drift. Instead, I write a pre-commit hook that checks the git diff for direct calls to observability modules that bypass my diagnostics module. Boom: fail the commit, inject a prompt telling the agent to use the diagnostics library. All of a sudden it's ten out of ten.
— Geoffrey Huntley, nobody should type code by hand anymore. here's what's left.
Recent articles
Hello Python 3.15, goodbye 3.10, and now I can use 3.11 - 12th October 2026
A new feature for my blog, built using my voice - 9th October 2026
Claude Haiku 5.5 - 7th October 2026
We're going to need default hard budget caps on pretty much everything - 3rd October 2026
This is a quotation collected by Simon Willison, posted on 13th October 2026.
git 57
ai 2,276
generative-ai 2,018
llms 1,984
coding-agents 257
geoffrey-huntley 4
agentic-engineering 65
Disclosures
Colophon
©
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026