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Charles Fleming

15 accepted papers

2026

CAR-LoRA: Training Compression-Aware and Robust LoRA Adapters for Evolving LLMs

ICLR 2026poster

The deployment of large language models (LLMs) for specialized tasks on resource-constrained edge devices like smartphones and sensors presents a significant scalability problem. To run on such hardware, these massive models must be compressed using techniques like \emph{quantization or pruning} to…

Cited by 0SourceScholar
2026

Command-V: Training-Free Representation Finetuning Transfer

ICLR 2026poster

Retrofitting large language models (LLMs) with new behaviors typically requires full finetuning or distillation—costly steps that must be repeated for every architecture. In this work, we introduce ⌘V (Command-V), a backpropagation-free behavior transfer method that copies an existing residual repre…

Cited by 0SourcecodeScholar
2026

HiPER: Hierarchical Plan–Execute RL for Multi-Turn LLM Agents

ICML 2026poster

Training LLMs as interactive agents for multi-turn decision-making remains challenging, particularly in long-horizon tasks with sparse and delayed rewards, where agents must execute extended sequences of actions before receiving meaningful feedback. Most existing reinforcement learning (RL) methods …

Cited by 0SourceScholar
2026

Membership Inference Attacks Against Fine-tuned Diffusion Language Models

ICLR 2026poster

Diffusion Language Models (DLMs) represent a promising alternative to autoregressive language models, using bidirectional masked token prediction. Yet their susceptibility to privacy leakage via Membership Inference Attacks (MIA) remains critically underexplored. This paper presents the first system…

Cited by 0SourceScholar
2026

ReTabSyn: Realistic Tabular Data Synthesis via Reinforcement Learning

ICML 2026poster

Deep generative models can help with data scarcity and privacy by producing synthetic training data, but they struggle in low-data, imbalanced tabular settings to fully learn the complex data distribution. We argue that striving for the full joint distribution could be overkill; for greater data eff…

Cited by 0SourceScholar
2026

Scaling Agentic Reinforcement Learning for Tool-Integrated Reasoning in VLMs

CVPR 2026

While recent vision-language models (VLMs) demonstrate strong image understanding, their ability to "think with images," i.e., to reason through multi-step visual interactions, remains limited. We introduce VISTA-Gym, a scalable training environment for incentivizing tool-integrated visual reasoning

Cited by 0SourcecodeScholar
2026

TMS: Trajectory-Mixed Supervision for Reward-Free, On-Policy SFT

ICML 2026poster

Reinforcement Learning (RL) and Supervised Fine-Tuning (SFT) are the two dominant paradigms for enhancing Large Language Model (LLM) performance on downstream tasks. While RL generally preserves broader model capabilities (retention) better than SFT, it comes with significant costs: complex reward e…

Cited by 0SourceScholar
2025

Agents Under Siege: Breaking Pragmatic Multi-Agent LLM Systems with Optimized Prompt Attacks

ACL 2025long

Most discussions about Large Language Model (LLM) safety have focused on single-agent settings but multi-agent LLM systems now create novel adversarial risks because their behavior depends on communication between agents and decentralized reasoning. In this work, we innovatively focus on attacking p…

2025

AssistedDS: Benchmarking How External Domain Knowledge Assists LLMs in Automated Data Science

EMNLP 2025

Large language models (LLMs) have advanced the automation of data science workflows. Yet it remains unclear whether they can critically leverage external domain knowledge as human data scientists do in practice. To answer this question, we introduce AssistedDS (Assisted Data Science), a benchmark de

2025

Just Enough Shifts: Mitigating Over-Refusal in Aligned Language Models with Targeted Representation Fine-Tuning

ICML 2025poster

Safety alignment is crucial for Large Language Models (LLMs) to resist malicious instructions but often results in over-refusals, where benign prompts are unnecessarily rejected, impairing user experience and model utility. To this end, we introduce **ACTOR** (Activation-Based Training for Over-Refu…

Cited by 0SourcePDFScholar
2025

On the Vulnerability of Applying Retrieval-Augmented Generation within Knowledge-Intensive Application Domains

ICML 2025poster

Retrieval-Augmented Generation (RAG) has been empirically shown to enhance the performance of large language models (LLMs) in knowledge-intensive domains such as healthcare, finance, and legal contexts. Given a query, RAG retrieves relevant documents from a corpus and integrates them into the LLMs’…

Cited by 5SourcePDFScholar
2025

Retracing the Past: LLMs Emit Training Data When They Get Lost

EMNLP 2025

The memorization of training data in large language models (LLMs) poses significant privacy and copyright concerns. Existing data extraction methods, particularly heuristic-based divergence attacks, often exhibit limited success and offer limited insight into the fundamental drivers of memorization

Cited by 0SourcePDFScholar
2025

Targeted Forgetting of Image Subgroups in CLIP Models

CVPR 2025poster

Foundation models (FMs) such as CLIP have demonstrated impressive zero-shot performance across various tasks by leveraging large-scale, unsupervised pre-training. However, they often inherit harmful or unwanted knowledge from noisy internet-sourced datasets, compromising their reliability in real-wo…

Cited by 0SourcePDFScholar
2024

Self-Adapting Large Visual-Language Models to Edge Devices across Visual Modalities

ECCV 2024poster

"Recent advancements in Vision-Language (VL) models have sparked interest in their deployment on edge devices, yet challenges in handling diverse visual modalities, manual annotation, and computational constraints remain. We introduce , a novel framework that bridges this gap by seamlessly integrati…