The Jev Playground app

app.py puts the use cases behind a click-through web UI built with Gradio. It's one self-contained file that you can read and copy.

uv sync --extra ui
uv run --extra ui python app.py

Then open http://127.0.0.1:7860.

Tab	What you can do
Playground	Type any text, choose Noul, Choice or Score, write a question and see Jev's answer with probabilities
Email triage	Paste an email and get its category, whether it needs a reply, its urgency, and optionally an LLM draft
SMS scam shield	Paste a text message and get a risk score, a verdict and a plain-words explanation
Code vuln hunter	Paste Python code and see every function checked for vulnerabilities (parsed, never executed)
Guarded agent	Ask a shell agent to do something and watch the guard allow, ask or block each command (dry-run)
Jev vs LLM race	Ask the same yes/no question to both brains and compare the latency

Safe to play with

Every tool in the app is read-only or a dry-run. The guarded agent's shell never executes anything.