Show HN: Jevper – the Jev interface on top of any OpenAI-compatible model

The Jev interface — state in, typed questions ( noul , choice , score ) out, answers carrying probabilities and confidence — on top of any OpenAI-compatible model.

Same call as typesafe-sdk , different backend: point jevper at a hosted LLM or a self-hosted llama.cpp server and code written for Jev keeps working, unchanged.

It does not call the hosted TypeSafe API and does not depend on typesafe-sdk or openai at runtime — the client object is duck-typed. Any object exposing responses.create or chat.completions.create works, including a self-hosted llama.cpp server.

jevper is an independent implementation of the documented System One wire format. It is not affiliated with, endorsed by, or supported by TypeSafe AI — questions about the API itself belong in their docs .