Free Lesson
Design Evals That Catch Real Failures
30 min
Aug 31, 2026 5:30 AM
What you'll learn
Read production traces and cluster the failures
Group real errors by cause so you fix categories rather than one-off symptoms
Turn a cluster into a running assertion
Convert an observed failure into a check that runs on every future change.
Validate an LLM judge before trusting it
Test the grader against human labels so its scores mean something.
Why this topic matters
Most teams are running a vibe check and calling it evaluation. Someone tries a fewprompts, it looks fine, it ships. Then it fails in production in a way nobody thought to test.Real evals are built from actual failure traces, not from imagination, and that changesboth what you measure and how much you trust the result.
