# Dual-loop bounded working memory

The work formalizes a failure mode it calls semantic thrashing, in which append-only working memory keeps accumulating noise and dilutes key evidence, and proposes VideoLoop: an outer multimodal agent explores the video inside a sandboxed filesystem while an inner memory orchestrator retrieves relevant artifacts from an unbounded filesystem and rewrites a bounded working memory after every step; across VideoMME (long), VideoMMMU, and LongVideoBench (long), VideoLoop improves four LVLM backbones in a plug-and-play manner, averaging a 4.2-point gain over baseline on VideoMME (long) and reaching 88.3%, 88.8%, and 80.9% with Gemini 3.1 Pro.

The work formalizes a failure mode it calls semantic thrashing, in which append-only working memory keeps accumulating noise and dilutes key evidence, and proposes VideoLoop: an outer multimodal agent explores the video inside a sandboxed filesystem while an inner memory orchestrator retrieves relevant artifacts from an unbounded filesystem and rewrites a bounded working memory after every step; across VideoMME (long), VideoMMMU, and LongVideoBench (long), VideoLoop improves four LVLM backbones in a plug-and-play manner, averaging a 4.2-point gain over baseline on VideoMME (long) and reaching 88.3%, 88.8%, and 80.9% with Gemini 3.1 Pro.