arXiv AI By Zoe Li

Traceable World State: A Provenance-Aware State Representation and Deterministic Replay Framework for Robotic Systems

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Traceable World State (TWS) is a middleware‑neutral semantic representation that records robotic world states with provenance, including entities, relations, observations, confidence, and revision metadata. TWS snapshots are immutable, support deterministic replay through ordered updates, and use a SHA‑256 hash chain for tamper‑evident logging. Evaluation on Python 3.10‑3.14, BEHAVIOR‑1K tasks, and simulated NVIDIA Unitree G1 trajectories shows TWS passes 38 tests, validates complete state lifecycles, achieves exact terminal‑state replay, and detects all injected corruptions with only a 1.72% storage overhead over plain JSONL.

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By Yiqi Wang, Zhifeng Rao, Jiaqi Zhang, Xiaoyang Li, Zhangkai Wu, Yiqun Duan, Mingkai Zheng, Fei Wang, Shan You, Taotao Cai
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VeriPhy: Agentic Physical Reasoning for World Model Evaluation and Refinement

VeriPhy is an auditable physical‑verification system that evaluates generated video by compiling prompts into typed physical obligations and a statically validated execution plan before any frames are observed. During execution, it gates calls to frozen low‑level experts (e.g., segmentation, tracking, counting, depth, OCR, audio‑event detection) and returns provenance‑carrying evidence records, which are mapped to a three‑valued state (supported, contradicted, unknown) with full traceability. On a 1,500‑clip corpus of human‑annotated flaw records, VeriPhy accounts for 228 failures out of 304, outperforming a published question‑decomposition evaluator that accounts for 164, while also providing auditable evidence for each verdict.