Syntari / Jev experiment
Decision layer prototype
SYSTEM ONE × GENERATIVE UI

Jev decides.
Syntari renders.

Jev does not generate the interface. It makes small, typed decisions that constrain what Syntari is allowed to build.

state decision UI plan validated interface
Input

Choose a request

01 STATE
User + application context
02 JEV System One
Typed decisions
03 SYNTARI POLICY
Primary
Supporting
Only approved registry components
04 ROUTING

05 SYNTHESIS
IR generated
Registry check Waiting
Validator Waiting
Renderer Waiting
Syntari remains authoritative
Live generator

Watch Syntari build the interface

Ready to generate
Jev What should happen?

Classifies intent, representation, evidence, reasoning and risk.

Syntari registry What is allowed?

Defines valid components, semantics, constraints and composition rules.

LLM What needs reasoning?

Only enters the path when synthesis or explanation is actually required.

Syntari renderer What does the user see?

Validated IR becomes a consistent interface using the design system.