Give Jev a typed choice
Send the current state with a Choice question, such as which event resource a guest needs.
TypeSafe Jev × QRGen / Workflow example
From a decision to a destination.
Jev makes a structured choice. Your application maps it to a trusted URL. QRGen turns that URL into a code people can scan. Three clear steps connect an AI decision to a real-world action.
Workflow / 001Input → action
01 / STATEWhat does this person need?
02 / JEVChoose a route
03 / QRGENShow a QR
Typed choiceApproved URLScannable output
Why these tools fit
Let the model decide.
Let code define where.
TypeSafe describes Jev as a System One model that returns typed values and probabilities for decisions such as choosing, scoring, and routing. QRGen accepts the destination your code selects and returns a QR image. The URL list stays in your application, so the model only chooses among routes you define.
A practical pattern
A reliable handoff has three parts.
Select an approved URL
Use the returned choice and confidence in your own logic. Map allowed choices to known destinations.
Create the QR image
URL-encode the chosen destination and call QRGen’s public image endpoint for PNG or SVG.
Preview the QRGen handoff
One decision. One place to go.
Switch between sample event routes to see how an application can turn an approved destination into a QR code.
Sample decision / Guest needs
Approved destinationhttps://qrgenapp.com/blog/event-checkin-qr/This preview switches sample routes locally; it does not send a request to Jev. In a real workflow, Jev supplies the typed choice and your server performs the mapping.
Server-side example
Connect the typed choice to QRGen.
Keep the TypeSafe API key on your server. If the choice is uncertain, pause for review. Otherwise, look up the matching URL and give QRGen the final destination. Jev is currently available through TypeSafe’s early access program.
Based on TypeSafe’s quick start and QRGen’s API reference. Read the Jev announcement.
Example / JavaScript on your serverJev → QRGen
const guestMessage = 'Where do I check in?';
const destinations = {
checkin: 'https://qrgenapp.com/blog/event-checkin-qr/',
schedule: 'https://qrgenapp.com/calendar/',
contact: 'https://qrgenapp.com/vcard/'
};
const response = await fetch('https://api.typesafe.ai/v1/systemone', {
method: 'POST',
headers: {
Authorization: `Bearer ${process.env.TYPESAFE_API_KEY}`,
'Content-Type': 'application/json'
},
body: JSON.stringify({
model: 'jev-latest',
state: guestMessage,
questions: {
route: {
type: 'choice',
instructions: 'Which event resource does this guest need?',
criteria: {
checkin: 'Check-in or event entry',
schedule: 'Times and agenda',
contact: 'Organizer contact details'
}
}
}
})
});
if (!response.ok) throw new Error('Jev request failed');
const { answers } = await response.json();
const { choice, confidence } = answers.route;
if (confidence < 0.7) throw new Error('Send decision for review');
const destination = destinations[choice];
if (!destination) throw new Error('Unknown route');
const qrUrl = `https://qrgenapp.com/api/qr?data=${encodeURIComponent(destination)}&size=512`;
console.log(qrUrl);Build your next handoff