Simon Willison Quotes Geoffrey Huntley on Enforcing Agent Use of a Diagnostics Library

What happened

Simon Willison quotes Geoffrey Huntley describing a pre-commit hook that checks the git diff for direct calls to observability modules that bypass his diagnostics library. When it finds one, the hook fails the commit and injects a prompt telling the agent to use the library. Huntley says the approach makes the agent “ten out of ten.”

The story so far

Geoffrey Huntley described a pre-commit hook that blocks commits when an agent calls observability modules directly instead of using his diagnostics library. In the account quoted by Simon Willison, the hook checks the git diff for those calls, fails the commit when it finds one, and injects a prompt telling the agent to use the library. Huntley said the approach makes the agent “ten out of ten.” That is his assessment of the approach, rather than a demonstrated performance result.

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