The Verifier Already Knows: Turn Pass/Fail Checks Into Training Credit
TL;DR for operators A long-running agent may execute dozens of actions before receiving one final pass/fail result. Applying that same terminal signal across the whole trajectory leaves training with little information about which earlier actions actually contributed to satisfying the task. VICT1 treats an existing programmatic verifier as a source of selective training credit. It decomposes the verifier into explicit checks, determines which checks are relevant to the rollout-level preference, and assigns additional credit only when trajectory evidence links a particular action to one of those checks. When the required evidence is missing or the verifier reconstruction is unreliable, the method falls back to the original outcome-based advantage. ...