SCIT (Suffix Cache Interchange Test) can identify which transformer object carries counterfactual computation through causal protocols that construct exact source-recipient counterfactuals and patch cache segments.

We introduce SCIT, the Suffix Cache Interchange Test, a causal protocol that constructs exact source-recipient counterfactuals, patches declared cache segments, and identifies which transformer object carries the counterfactual computation.

http://arxiv.org/abs/2608.27265v1