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Decision Lab: visual System One playground for building decisions, comparing Jev, OpenJEV, Laya, and exploring what-if changes.
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- Updated Sep 2026
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Jev directory
CommunityJev Demos & Experiments
Decision Lab
A local visual playground for System One decision APIs: build Yes/No, Choice and Score decisions, compare hosted Jev, OpenJEV or local Laya on the same input, and watch what-if changes move the answers and probabilities.
- Stars
- 0
- Language
- JavaScript
- License
- MIT
- Reading time
- 2 min
- Published by
- Community
- Author
- Amine-LG
- Last verified
- Oct 2026
Used inJev for Software & DevTools
- Languages
- JavaScript
- Platforms
- Browser
- Capabilities
- Open sourceRuns locally
Highlights
- Build Yes/No, Choice and Score decisions visually, with an optional State field as evidence.
- Compare runs one experiment against several models and surfaces where answers or priorities differ.
- What-if keeps a baseline so you can change evidence or criteria and see exact input and output changes; rerun unchanged to check repeatability.
- Two built-in demos need no API key, but their outputs are simulated, deterministic examples rather than AI predictions.
- Views cover Results, Compare, What-if, Raw and History; hosted Jev, OpenJEV, local Laya or any compatible System One endpoint can be connected.
Watch out
README reviewed 2026-10-17; the captured README stops mid-word, and the repository shows no tests, benchmarks or accuracy numbers, while its demo outputs are explicitly simulated examples, so nothing here proves how a real endpoint will answer.
Questions about this entry
Short answers drawn from the linked project or page.
A local visual playground for System One decision APIs. You build an experiment, inspect the answers and probabilities, compare models on the same input, and change the evidence to see what moves, without reading API responses by hand.
Hosted Jev is one of the models you can compare, alongside OpenJEV, local Laya or another compatible System One endpoint. The repository carries the jev, openjev, system-one and model-comparison topics.
Yes. Two built-in demos let you explore Results, Compare, What-if, Raw and History immediately with no key. Their outputs are simulated, deterministic examples, not AI predictions.
Yes/No, Choice and Score decisions built visually, with an optional State field as evidence. The What-if view then captures a baseline so changes in evidence or criteria can be compared exactly.
One experiment runs against multiple models so you can spot where their answers or priorities differ. The repository description names Jev, OpenJEV and Laya as the comparison targets.
It is a playground, not an evaluation framework: the README shows no tests, benchmarks or accuracy numbers, and the built-in demo outputs are simulated, so real behavior depends on the endpoint you connect.
It is Amine-LG's MIT-licensed JavaScript repository, created and last pushed 2026-09-23 with no stars or forks; it was discovered through the topic:systemone search.
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