Steven Gonsalvez

Software Engineer

Quoting Geoffrey Huntley

Why CEREBRO kept it

AGENTS.md drift and agent diagnostics discipline; practical pattern insight.

The text below is an automated extraction of the article at https://simonwillison.net/2026/Oct/13/geoffrey-huntley/, stored verbatim in the public cerebro-vault repository. Copyright remains with the original publisher (simonwillison.net).

<blockquote cite="https://ghuntley.com/agency/"><p>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.</p></blockquote> <p class="cite">&mdash; <a href="https://ghuntley.com/agency/">Geoffrey Huntley</a>, nobody should type code by hand anymore. here's wh

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