Weijian Zhang

I build tools for open-weight models and software that agents can use

Right now I’m building Tuned Tensor, a feedback loop for defining model behaviour, fine-tuning open-weight models, catching regressions, and turning failures into the next dataset.

Recent experiments include a local 2B email-triage model, an autonomous loop for prompt-injection classifiers, and Deeper Level, a chess interface that shows the model’s candidate moves and critique.

Work · Writing · GitHub · Subscribe

recent writing