repeng

Why we included this project

repeng is a small Python library that makes representation engineering practical. You wrap a Hugging Face transformer model, build a short dataset of paired statements that differ along a trait you care about, and train a control vector in under a minute. At inference time you apply that vector to steer generation, say making a model answer as if it were more or less 'trippy' or honest. The API stays small, a few classes and a train call, with torch and transformers doing the heavy lifting underneath, so it suits people who want to steer model behavior without building the machinery from scratch. The included notebooks walk through the whole workflow, from dataset construction to vector export.