Gradient Routing Generalizes to Unrouted Hack Types
Tests whether gradient routing on visible reward-hack types suppresses unrouted hack types at test time in Qwen3-32B, finding mostly encouraging transfer with several unexplained failures.
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Gradient Routing Localizes and Removes Unintended Behaviors in RL
Proposes GRAFT, which confines weight updates from monitor-flagged reward hacks to a removable adapter, so ablating it prevents hacking, including hacks the monitor cannot detect, in small-scale experiments.