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Yi-Tong Guo

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#artificial intelligence Preprint Sep 2026

When Safety Routing Breaks: Understanding Alignment Fragility under Benign Fine-Tuning

Overall, safety failure is best understood as a disruption of a low-rank output-routing mechanism, and it is shown that LoRA and ASAM mitigate early collapse by suppressing output-side sharpness, but their protection weakens at larger fine-tuning scales.

Yi-Tong Guo, Xiaoyi Chen, Si-Yuan Zhang et al. · 0 citations