arxiv
PublishedSeptember 18, 2026 at 4:00 AM
Don't Mask the Environment: Observation Supervision Changes How Agents Explore Under RL
Publisher summary· verbatim
arXiv:2609.20715v1 Announce Type: cross Abstract: Agent trajectories record what an agent does and what happens next. Yet standard supervised fine-tuning (SFT) applies loss only to agent-authored action tokens, using environment observations as context but not as prediction targets. We ask whether t
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Originally published on arxiv ↗