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Imprint Reader: From Weight-Update Readout to Behavioral Intervention

The Imprint Reader, trained with Semantic Mount-and-Read Tuning (SaRT), generates natural-language descriptions of frozen weight updates in language models. It demonstrates 2% pass rate for knowledge and 16% for behavior in held-out updates, and improves harmful-prompt refusal and mathematical reasoning through MetaEdit intervention.

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PublishedSeptember 28, 2026Guanxu Chen, Qihao Lin, Jing Shao
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WHY IT MAY MATTER

The Imprint Reader provides a method to interpret model updates and improve behavior through targeted interventions, showing potential for safer and more transparent AI development.

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