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Petri Lahdelma
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Prompt regression
Glossary
Prompt regression
A drop in output quality after a prompt change.
Why it matters
Business and delivery impact.
Uncontrolled changes break workflows.
How to measure
Proof you can track.
Score delta on evaluation set.
Example
What it looks like in practice.
New prompt produces longer but less accurate specs.
Related
Keep the context connected.
Prompt evaluation
Prompt versioning