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News/ESPO: Error-Structured Prompt Optimization via Diagnose, Diversify, and Stabilize
arxiv
PublishedSeptember 4, 2026 at 4:00 AM

ESPO: Error-Structured Prompt Optimization via Diagnose, Diversify, and Stabilize

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Publisher summary· verbatim

arXiv:2609.04197v1 Announce Type: cross Abstract: Evolutionary prompt optimizers such as GEPA suffer from prompt bloat: each iteration appends rules and caveats, producing prompts up to 3$\times$ longer yet no more accurate. We trace this to three deficiencies - incomplete error observation, limited

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