Author

Benoît Sagot

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#natural language process... Preprint Sep 2026

LLM Forensics: Where Do Backdoors Hide? Localizing and Controlling Trigger Mechanisms with Sparse Autoencoders

These token-trigger mechanisms decompose into distinct SAE feature directions, with separate features for trigger detection, residual-stream propagation, and later language tracking, with this role-level decomposition most likely to transfer to other trigger-based backdoors, even when the payload, layers, or circuit lo...

Wissam Antoun, Francis Kulumba, Théo Lasnier et al. · 1 citation

#machine learning Jul 2026

Reinforcement Learning for Code Optimization

This work makes execution time learnable through three stages: how code is tested, by building DMC-Optim with large optimization tests and a calibrated sandbox; how speed is turned into reward, by composing correctness and speed in the RL environment and using an offline simulator to predict the most promising configur...

Pierre Chambon, Kun-Hao Zheng, Juliette Decugis et al. · arXiv.org · 0 citations