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Testing

3 posts

The eval graded the answer key, not the document

An extraction eval stayed green for weeks while users watched their data get mangled. The cause: it graded output against our labels, not against the source.

Sep 02, 20269 min readAi
A teacher's red pen resting on a multiple-choice answer sheet marked all correct, beside the original exam booklet lying open and unread.

The eval was grading a prompt we had deleted

Our record/replay eval could not run for two days and reported green throughout, because the scorer kept grading cached results from a prompt we had deleted.

Sep 02, 20269 min readAi
Eval grading deleted prompt

Three Ways VCR Cassette Recording Lied to Me

Three vcr recording behaviors that never raise an error: the config beats the CLI flag, ambient traffic gets taped, and re-records append instead of replacing.

Jul 15, 20265 min readVcr
Three ways VCR cassette lied to me