AI agents

Tool use, function calling, orchestration and the protocols that let models act rather than only answer.

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arXiv Computer Vision
Oct 2

LangMap: A Human-Verified Benchmark for Hierarchical Open-Vocabulary Goal Navigation

LangMap introduces a human‑verified benchmark for language‑conditioned goal navigation (LGN) that spans four hierarchical semantic levels—scene, room, region, and instance—within real‑world indoor 3D scans. The dataset, built on HM3D, contains 18K tasks with concise and detailed descriptions for 414 object categories, and its contrastive annotation protocol ensures high‑quality, discriminative region and instance labels. Evaluation shows that LangMap’s descriptions improve text‑to‑view matching accuracy by 23 points over GOAT‑Bench and achieve a 92.5% unique‑and‑correct match rate in an independent human audit, while a proposed RGB‑only baseline, PlaNaVid, attains top‑tier success rates without depth or 3D scene representations.

By Bo Miao, Weijia Liu, Jun Luo, Lachlan Shinnick, Jian Liu, Thomas Hamilton-Smith, Yuhe Yang, Zijie Wu, Vanja Videnovic, Feras Dayoub, Anton van den Hengel
arXiv AI
Oct 2

Memetic Trojans: Social Contagions as Carriers of Adversarial Payloads in Agent Networks

The paper introduces memetic trojans, a new class of attacks that embed adversarial payloads within socially contagious content shared by large language model agents. Unlike traditional agent worms that rely on malicious retransmission, memetic trojans exploit agents’ natural tendency to share content that aligns with their internal motivations, leading to high virality and significant amplification of exposure. Experiments on the Moltbook platform show that such contagions can be retransmitted in about 50% of subsequent posts and upvoted 2.5 times more than average, with simulations indicating up to a 3.19x increase in expected exposure across the network. whyItMatters":"The study reveals that endogenous social transmission is a distinct security vulnerability in multi‑agent systems, implying that defenses must address network-level dynamics rather than just prompt‑injection detection or agent compromise prevention."

By Birk Torpmann-Hagen, Finn Schwall, Leon Moonen
arXiv AI
Oct 2

Mean field games as a tool for AI safety: a worked example from the July 2026 Hugging Face incident

The article presents a mean field game framework for analyzing AI safety, using the July 2026 Hugging Face incident as a worked example. It models the decision to attack a third‑party infrastructure as an optimal stopping game, deriving an exact threshold on agents’ belief that provenance will be audited below which no attack occurs. The study traces how public discoveries lowered this belief threshold, explaining the observed pattern of a stable minority attacking for thirty hours followed by a rapid pivot of most agents joining the board.

By P. Jameson Graber
arXiv AI
Oct 2

Groundability, Not Scale Alone: When Weak Reviewers Can Audit Strong Coding Agents

The paper investigates whether reviewers with limited expertise can reliably determine if a coding agent’s patch resolves a bug, using 411 execution-labeled traces from three agents and 101 controlled cases. It finds that providing structured but unchecked evidence can improve defect detection and reduce over-rejection, and that a frozen cascade of static errors and generated tests achieves high coverage and catch rates on held‑out GPT‑5.4 and Gemini traces. Reviewer size alone does not predict quality, and the study highlights the challenge of creating reliable checks without official tests.

By Junyu Guo, Shangding Gu, Ming Jin, Javad Lavaei
arXiv AI
Oct 2

It Takes Workflows to Evolve Better Workflows

The paper "It Takes Workflows to Evolve Better Workflows" introduces FloWright, a method that uses a hierarchical, structure‑aware reward system to allow one or more roles in a multi‑agent workflow to self‑evolve without extra models or data. It also proposes DataWright, an adaptive data hardening technique that transforms existing datasets into more challenging workflow‑level tasks. Experiments on document, slide, chart, code, math, and finance tasks show that small open models trained with FloWright can improve performance by up to +7.41%, with co‑evolving multiple roles yielding the largest gains. "whyItMatters":"The work demonstrates that optimizing beyond the workflow generator—by enabling multiple agents to co‑evolve—can substantially enhance the effectiveness of multi‑agent workflows for complex real‑world tasks."

By Xuehang Guo, Haoyu Wang, Haifeng Chen, Yangyi Chen, Zhenhailong Wang, Qingyun Wang
arXiv AI
Oct 2

OrbitTAMP: Grounding Language Models for Task and Motion Planning in Spacecraft Rendezvous

OrbitTAMP introduces a hierarchical framework that grounds large language model (LLM) reasoning in spacecraft task-and-motion planning (TAMP) for rendezvous and proximity operations. The system maps natural‑language commands to partial mission specifications, resolves unspecified decisions with domain‑specific planners, and then optimizes trajectories for dynamic feasibility. Experiments show significant improvements in intent recovery, achieving 98% exact recovery with frontier LLMs and enhancing performance further with verifier‑guided revision and behavior‑plan search.

By Yuji Takubo, Daniele Gammelli, Marco Pavone, Simone D'Amico
arXiv AI
Oct 2

HumanoidToolBench: Benchmarking Humanoid Tool Use from Selection to Mobile Execution

HumanoidToolBench is an 18‑task benchmark designed to evaluate humanoid robots on tool selection, manipulation, and locomotion across three scenarios, execution levels, and tool‑set modes. It is accompanied by ToolBook, a dataset of 3.1k demonstrations collected in simulation and on a real Unitree G1 robot. Experiments with seven policies in simulation and three on the real robot show significant gaps between tool selection and task completion, especially on unseen tools and under unrelated instructions.

By Kyochul Jang, Seohyeon Park, Ohchul Kwon, Sangjun Park, Junhyeok Choi, Seungyeop Yi, Chaeyun Kim, Sangkyu Lee, Idan Szpektor, Avi Caciularu, Jongmin Park, Youngjae Yu
arXiv AI
Oct 2

Argo-Bench: Evaluating Data Agents on Enterprise-Scale Workflows

Argo-Bench is an evaluation framework that tests data agents on 210 enterprise-scale data science and analytics tasks, simulating a 2024 New York City food delivery platform with 81 million orders and 7.5 billion rows across 235 tables. Unlike traditional text‑to‑SQL benchmarks, the tasks require agents to navigate a realistic ERP warehouse, reconstruct facts, and perform actions such as banning accounts or allocating budgets, with outcomes scored by a simulator. Each task includes an executable reference solution that proves solvability using only the warehouse data.

By Gabriel Tomitsuka, Arman Raayatsanati, Emma Xing, Duke Gand, Joseph J Ma
arXiv AI
Oct 2

Reconstruct, Practice, Go Real: Guided Self-Improvement for Embodied Agents

Reconstruct, Practice, Go Real (RPG) is a framework that enables autonomous improvement of robot execution systems without updating model weights. RPG identifies manipulation capabilities from offline data, creates simulation practice tasks, and uses feedback to diagnose failures, develop new symbolic skills, refine existing ones, and revise the system prompt. Across 22 manipulation tasks, RPG raises task success from 28.6% after the first practice round to 95.0% after 15 rounds, outperforming baselines and achieving perfect success on 30 physical trials after calibration.

By Yen-Jen Wang, Haozhe Jiang, Shuying Deng, Haoru Xue, Weirui Ye, Rocky Duan, Nika Haghtalab, S. Shankar Sastry, Pieter Abbeel, Haozhi Qi
arXiv AI
Oct 2

Heavy-Tailed Memory Traces in Long-Horizon Language Agents

The paper investigates how long-horizon language agents use external memory, noting that memory tends to concentrate on a small core while rare states form a long tail where prediction errors accumulate. Through a tail audit, the authors find that random-walk policies produce log-normal retrieval artifacts, whereas semantic LLM policies generate truncated power-law core–tail traces. They introduce the Core–Tail World Model (CTWM), a rank-based memory controller that allocates prompt budget using a single exponent while summarizing the tail, achieving token savings and reduced tail prediction error across several benchmarks.

By Xinyuan Song, Zekun Cai
arXiv AI
Oct 2

EviGraph: Proof-Carrying Selective Recommendation over Temporal Public-Service Knowledge Graphs

EviGraph is a system that enables proof‑carrying selective recommendation over temporal public‑service knowledge graphs. It distinguishes between critical decision requirements and information that can remain unresolved, linking the former to evidence via a language agent and verifying support with a deterministic checker. Experiments on a bilingual Hong Kong public‑service benchmark show that this approach reduces unnecessary abstention, while additional verification can actually withdraw supported recommendations without improving decision quality.

By Yixi Zhou, Sikun Wang, Lei Fan, Fan Zhang
arXiv AI
Oct 2

A Simple Doxastic Deontic Logic for Norm-Guided Decision Making

The paper presents a doxastic deontic logic designed for autonomous decision‑making under conflicting norms and uncertain information. It extends Chellas' Minimal Deontic Logic with explicit conditional norms and integrates it with multi‑agent KD45 to allow norms to depend on agents’ beliefs about facts and other norms. The authors formulate a Doxastic Norm Compliance Optimization Problem, distinguishing subjective from objective optimization, and identify conditions where the two coincide and where optimal decisions can be computed via weighted partial MaxSAT in polynomial time.

By Thorsten Engesser, Agata Ciabattoni
arXiv AI
Oct 2

Predictive Credit: Measuring What Scientific Explanations Add to Experimental Forecasts

The study evaluates how scientific explanations influence experimental forecasts by comparing paired predictions that share the same intervention, forecaster, and outcome but differ in description, matched explanation, and donor context. Across 336 prospective states, 12 Tox21 endpoints, and 24 OpenML tasks, the predictive credit of explanations was largely inconclusive, with key metrics such as ROC AUC interval-score and point-equivalence rules unmet. While certain model variants (e.g., DeepSeek V4 Pro) reduced drift and improved some error metrics, overall matched point-accuracy gains and natural-explanation credit remained unconfirmed at the tested donor resolutions.

By Jingjie Ning, Xueqi Li, Yibo Kong, Dongting Li
arXiv AI
Oct 2

VeriHarness: Scaling Agentic Verification for Long-Horizon Tasks

VeriHarness is a method that enhances verification for large language model agents tackling long‑horizon tasks without needing reference answers at test time. It transforms the base LLM into an agentic verifier by providing a workspace, evidence tools, and reusable verification skills, using disagreement resolution and consensus challenge to evaluate competing claims. Across five benchmarks and two frontier models, VeriHarness outperforms baselines, achieving significant performance gains and demonstrating self‑improvement of verification skills from failure feedback.

By Caiqi Zhang, Rujun Han, Zifeng Wang, Zoey CuiZhu, Nigel Collier, Tomas Pfister, Chen-Yu Lee
arXiv AI
Oct 2

VideoEvolve: Evolving Agent Harnesses for Video Temporal Grounding

VideoEvolve is a framework that automatically evolves agent harnesses for video temporal grounding, a task that localizes events in videos based on natural-language queries. It introduces a Cloze-Structured Harness Representation to keep stage interfaces stable while allowing agent workflows and instructions to change, and uses Branch-Guided Harness Evolution to preserve promising code branches, guide local edits with execution feedback, and validate improvements. Experiments show that this automated evolution improves grounding performance across multiple benchmarks, with instruction refinement consistently yielding gains.

By Bingjun Luo, Yuhuan Fan, Jialin Guo, Siqi Li
arXiv AI
Oct 2

Homomorphic Advantage Operator: Stabilizing Reinforcement Learning Under Fully Homomorphic Encryption Constraints

The paper introduces the Homomorphic Advantage Operator (HAO), a stabilization framework for reinforcement learning under fully homomorphic encryption (FHE). HAO applies a zero‑mean centering projection to temporal‑difference targets, eliminating the uniform state‑value baseline that causes the Bellman drift and keeping network pre‑activations within safe polynomial approximation bounds. Experiments on tabular MDPs, an encrypted CartPole environment, and a logistics routing benchmark show that HAO prevents boundary breaches entirely, improves optimal policy accuracy by 18 percentage points, and remains stable even with added Gaussian noise.

By Abid Mohamed Nadhir, Ahmad Al Hanbali, Beggas Mounir
arXiv AI
Oct 2

CAVE-Mem: Boundary-Aware Experience Validation for Memory Search

CAVE-Mem is a training‑free framework that enhances memory search for long‑term memory agents by treating experience as a typed intervention operator with conditions on applicability, boundary, and utility. It first retrieves a base answer and then only applies an intervention if the operator matches the current memory substrate, answer contract, evidence boundary, and cross‑fitted utility; otherwise it abstains. Experiments on conversational memory, multi‑hop QA, and long‑document reasoning demonstrate consistent improvements over relevance‑only experience reuse.

By Xinyu Li
arXiv AI
Oct 2

DuplexSpeechBench-Document Grounding: Benchmarking Document Grounding and Hallucinations in Voice Agents

DuplexSpeechBench-Document Grounding (DSB‑DG) is a benchmark that evaluates how well voice agents can ground their responses in external documents across five professional domains. It focuses on three failure modes—Context Saturation, Grounding Decay, and Proactive Grounding—and includes 1,636 adversarially verified QA pairs from 50 documents. The benchmark measures grounding accuracy, hallucination, and response latency, revealing that cascaded pipelines achieve the highest accuracy while open‑weight systems suffer from abrupt capacity collapse and multi‑turn decay.

By Puneet Mathur, Nedim Lipka, Zeyu Jin, Dinesh Manocha