What Should a Navigator Remember? Spatiotemporal Memory for Zero-Shot Vision-Language Navigation
arXiv:2610.38318v1 Announce Type: cross Abstract: Zero-shot vision-and-language navigation (VLN) requires an agent to use past observations without navigation-specific training. We study what information an 8B-scale navigation system should retain and how it should be organized for subsequent decisions. Our agent combines instruction progress, hierarchically compressed observation history anchored to poses, and accumulated geometry in complementary task, temporal, and spatial memories. An 8B ob…