AI RESEARCH
As X, Do Y: How Persona and Task Combine in Instruction-Tuned LLMs
arXiv CS.AI
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ArXi:2605.23147v1 Announce Type: cross Role prompts of the form As X, do Y admit a clean linear decomposition at one specific site in the residual stream: the prompt-to-answer transition -- the last prompt token together with the first two generated tokens -- in an early/mid layer band. There, persona and task contribute through partially orthogonal additive directions.