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E_{\sigma_{1}}) 0.353 Frobenius (‖ΔW‖F\|\Delta W\|_{F}) 0.097 Leading Singular Value (σ1\sigma_{1}) 0.056 Entropy (HH) 0.042 Detection Performance. We evaluated on a held-out test set of 50 benign adapters (trained on Alpaca, Dolly, GSM, Algoverse AI Research
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Spot poisoned LoRA adapters without running them: a weight-space analysis achieves 97% accuracy in detecting backdoors, even when the trigger is unknown.
