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AI IntelligenceSep 20, 2026Practical Tip
Article

Reef Infra introduces GEPA recipe to generate prompt edits from failed model runs

Frontier EditorialSource: Reddit r/PromptEngineering
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Source Brief

Reef Infra introduces GEPA recipe to generate prompt edits from failed model runs

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Practical Tip

1. Identify failed model runs where the LLM struggled with or fought specific prompt instructions.
2. Create a minibatch of these failed traces to serve as a training set for prompt reflection.
3. Use a secondary reflection model to analyze the failures and propose targeted rewrites to the prompt components.
4. Validate the newly edited prompt against the parent prompt on a fresh validation dataset to ensure the changes generalize well.