Use evals before changing prompts

Treat prompt changes like code changes: measure the behavior before deciding whether the edit helped.

July 9, 2026 · 2 min · Lukas Walter

Stop Guessing – Use Golden Datasets for Prompt Evals

Use a small golden dataset to catch prompt regressions, compare changes against a baseline, and validate model updates before users do.

March 25, 2026 · 2 min · Lukas Walter

Eval-first: Why “It Worked Once” Is Not a Sign of Quality

Why eval-first matters for LLM apps and how to use datasets, scoring rubrics, and CI quality gates to catch regressions early.

February 7, 2026 · 3 min · Lukas Walter