Residual differences between a public base model and its private PEFT adaptation can reveal the adaptation family, rank bucket, and sometimes the exact private checkpoint, but only under known-base, rich-output conditions.
QLoRA: Efficient finetuning of quan- 12 tized LLMs
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When Do PEFT Adaptations Leak Structure? Measuring Black-Box Structural Bounds in Public-Base Model Services
Residual differences between a public base model and its private PEFT adaptation can reveal the adaptation family, rank bucket, and sometimes the exact private checkpoint, but only under known-base, rich-output conditions.