nf-jev
Nextflow plugin exposing Jev noul, choice and score judgments as pipeline functions you can gate on with ordinary operators.
Overview
nf-jev, from the Nextflow organisation, exposes TypeSafe System One judgments as ordinary Nextflow functions. A pipeline builds typed questions as values with noul (is this true?), choice (which one?) and score (how much?), then calls jev(state, questions) to answer them all against one state in one request and gates on the probabilities with plain Nextflow operators.
The README stresses that Jev returns a probability distribution over allowed answers, which a pipeline can branch on, unlike a confidence number a language model invents. Configuration covers provider (TypeSafe or OpenRouter), API key via secrets or environment, a pinned model for reproducible results, endpoint, timeout and an optional cache directory. It is a beta plugin whose function names and answer shapes may change, so versions should be pinned. It suits bioinformatics and data pipelines that need semantic checks, such as flagging text that gives clinical guidance.
What the decision model decides
| Type | Question | Answers |
|---|---|---|
| Yes / no | The text gives clinical guidance. | true · false |
| Choice | Which one? (choice with criteria) | — |
| Score | How much? (score with levels) | — |
How it works
- Enable nf-jev in nextflow.config and set the API key.
- Build questions with noul, choice and score.
- Call jev(state, questions) inside a channel operation.
- Filter or branch on the returned probabilities.
Strengths
- Native Nextflow functions; no glue code.
- Caching and pinned models support reproducibility.
- Supports TypeSafe or OpenRouter.
Caveats
- Beta; API may change without deprecation cycle.
- Requires an API key and network access from the pipeline.
Getting started
Add plugins { id 'nf-jev@0.2.1' } to nextflow.config and export TYPESAFE_API_KEY.At a glance
- Type
- Plugin
- Status
- beta
- Language
- Groovy
- Runtime
- Nextflow plugin
- Has code
- yes
- Has tests
- yes
Use cases and integrations
How curated lists describe it
TypeSafe Jev plugin for example.
hellogumbo/awesome-jev
Frequently asked questions
What functions does nf-jev provide?
noul, choice, score and jev, which answers several questions against one state in one request.
How do I make results reproducible?
Pin a model snapshot and set a cacheDir.
Is it stable?
No, it is beta; pin a version and expect changes.
Related projects
Verifiable coding-agent runtime built on checkable execution graphs, listed with an optional Jev provider for bounded choices like routing.
ServiceproductionTypeScriptAutoGPT agent platform, listed as adding Jev decision blocks for typed routing, filtering, scoring and confidence-gated next actions.
ProjectproductionPythonOpen-source workspace for building, deploying and monitoring AI agents and workflows, listed as integrating TypeSafe System One.
ProjectproductionTypeScriptWorkflow DSL for existing agents that uses Jev for the steps that are decisions and calls an agent only when investigation is needed.
LibrarybetaTypeScriptn8n community node for Jev that adds a typed smart if-statement: choice, score and noul with probabilities in workflows.
ProjectbetaTypeScriptn8n Jev Classification node that branches items by category with a Needs Review branch, plus parallel and batched requests.
ProjectbetaTypeScript