Rodney Lafuente-Mercado
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126
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ML×1AI×1
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2026
ARCA: Adapter-Residual Credit Assignment When Token Signals Degenerate
The paper introduces ARCA, a novel credit assignment method that measures token salience directly from the adapter's residual hidden state, addressing the degeneracy of standard intrinsic signals when using low-rank fine-tuning like LoRA.
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