STAMP: Credit Assignment for Search Agents
_reachsumit · x · 2026-07-14
STAMP is a new method designed for Deep Search Agents. Its core mechanism traces back exactly which search step originally discovered a piece of cited evidence, injecting this step-level credit assignment into RL training.
The article emphasizes its use of sign-preserving advantage modulation for step-level credit assignment, helping search agents better learn which retrieval steps actually yield useful evidence.
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