← Field Notes
NOV 24 · Clipped · via Braintrust blog Production DriftEval Set Authoring

Braintrust turns a described failure into test cases and a scorer

Writing the test set was the chore that kept teams iterating by feel. Describing the failure in a sentence and getting rows and a scorer back is the step that turns the chore into a habit.

Read the source ↗ attached to Production Drift →
watching

watching → emerging → established

A candidate behavior, not yet a published pattern. Early signal — worth tracking, not yet worth standardizing on.

7 documented sightings since Aug 2024 — every one traces to a dated source.

See the evidence →

Machine summary of the source

Loop is a chat assistant inside Braintrust. The person describes a failure in plain words, and Loop turns it into dataset rows, a filter over the logs, or a scorer. A September 2026 addition, Patterns, runs Loop on a schedule over production logs and offers to make a scorer from a pattern it found. The comparison view keeps a baseline the person picks and marks each row's change in red or green.

The summary above is generated; the note at the top is the editorial judgment. Primary source ↗