Jev glossary
Ecosystem
Wire-compatible endpoint
A local server that accepts POST /v1/systemone and returns Choice, Score, or Noul answers in the documented JSON shape.
- Category
- Ecosystem
- Also known as
- None
- Reading time
- 1 min
- Related terms
- 4
- Directory entries
- 6
- Docs
- Not listed
- Added
- 2026-09-28
Definition
Wire compatibility means a client written for TypeSafe can change its host and parse the response. Ollaya, Lichen, Rizzo Flow, verdict, and jevos all advertise that surface. jevos then returns 422 for Choice and Score.
It is not a claim that the probabilities match Jev. Verdict's check is an unmodified jev-ultrafast client. Lichen publishes a JevBench table and says the accuracy edge is not significant. Treat a successful parse as a protocol test.
Tagsapiopen-models
Related terms
Definitions that connect to this one.
Base URLThe host a Jev client calls. Point it at a local System One server and the rest of the request stays the same.EcosystemSystem One endpointThe single HTTP endpoint that evaluates a state against typed questions: POST https://api.typesafe.ai/v1/systemone.API & ModelsLocal decision serverA process on your machine that answers typed questions from local weights, so the state does not leave the host.EcosystemDrop-in model swapPointing an existing Jev client at another model or host without rewriting the question or answer types.API & Models
From the Jev directory
Directory entries that go deeper on this term.
A local daemon that pulls open decision models and serves them on TypeSafe's /v1/systemone, so a Jev client switches hosts with TYPESAFE_BASE_URL.
Jev Models & Reimplementations#community#rust#open-models
Community
ollaya-dev/ollayaRust
ollaya-dev/ollayaRustA local /v1/systemone server that reads label probabilities from a GGUF chat model, with prompt repetition and a confidence shrink toward uniform.
Jev Models & Reimplementations#community#python#open-models
Community
Mushroom-Systems/lichenPython
Mushroom-Systems/lichenPythonA local server that reads next-token probabilities from a fine-tuned Spark model and returns Choice, Score, and Noul answers with zero generated tokens.
Jev Models & Reimplementations#community#python#open-models
Community
Rizzo-AI-Academy/rizzo-flowPython
Rizzo-AI-Academy/rizzo-flowPythonA Python server in front of llama-server that reads one-token label probabilities and exposes them as POST /v1/systemone.
Jev Models & Reimplementations#community#python#open-models
Community
khimaros/verdictPython
khimaros/verdictPythonA local yes/no decision model that speaks Jev's wire format on a laptop CPU, refusing Choice and Score until those question types ship.
Jev Models & Reimplementations#community#python#open-models
Community
feder-cr/jevC++
feder-cr/jevC++A self-hosted System One server: one /v1/systemone contract, a Docker image each for Laya and kev, and a playground where snake, dino, and tetris call that endpoint.
Jev Models & Reimplementations#community#python#local
Community
chaitin/DecisPython
chaitin/DecisPythonFrom the Jev AI model community
Posts from builders shipping with Jev right now.