Viva

Viva generates an oral-style exam from a student's own JavaScript. It makes small, mechanical changes to a function, such as turning < into <= or removing a return. A language model picks the changed versions worth asking about and names the misconception each one probes.

The student sees the changed code and an input, predicts the output, and says how confident they are. Viva then runs both versions and reveals the result. The answer key always comes from executing the code, never from a model's opinion.

The report sorts the answers into four calibration buckets (confidently right, confidently wrong, uncertain and right, uncertain and wrong) and gives a Brier score, so the student can see where their confidence misled them.

Built with: TypeScript, React, Vite, acorn, fast-check, Vercel.

Code: github.com/Enhso/viva