Let the agent build the app.
Keep the logic inspectable.
A gallery of working apps where every pricing rule, eligibility check, and policy gate lives in a Leapter Blueprint: a side-effect-free program you can read, render, run, and trace.
Examples
5 working apps. Pick one.
Each example is a Next.js page wired to its own Leapter project. Open one, change inputs, then click Glass Mode to see the logic that ran.
Airline Crew Assignment Validator
Validates crew-to-flight assignments against duty time, rest, qualification, complement, base airport, and monthly hour rules.
validate-crew-scheduleOpenKfz-Steuer Rechner
Berechnet die jährliche deutsche Kfz-Steuer für PKW nach Erstzulassung, Antriebsart, Hubraum, CO2 und Schadstoffklasse.
kfz-steuerOpenKYC Screening
Screen an individual customer and get a risk rating, decision, and explanation.
kyc-screeningOpenSolar Surplus Controller
Decides EV charging power from rooftop solar surplus, with a deadline override when the car must be ready in time.
pv-surplus-chargingOpenWarranty Coverage Classifier
Classifies a product's warranty coverage based on type, age, usage intensity, and premium status.
warranty-coverageOpenThe artifact
Same file. Two views.
Both are the program.
Veritas is a text-based logic format. It validates locally, executes deterministically, and renders as an editable visual Blueprint. Sections carry the intent of a rule alongside its executable body.
Drag the handle on the showcase to compare the two representations. The diagram below replays a real run with the active path lit up — exactly what Glass Mode shows inside every example.
vehicle-tax / regime.logic.vtssection "Pure electric vehicles are tax-exempt" {
"""
Electric vehicles are exempt from annual tax for 10 years
from first registration under § 3d KraftStG. After expiry,
the tax is reduced by 50% (§ 9 (2) KraftStG).
"""
choose {
if (engineType is "electric") {
taxExempt = true;
annualTax = 0;
regime = "ev-exempt";
return;
}
}
}
vehicle-tax / regimePure electric vehicles are tax-exempt
Electric vehicles are exempt from annual tax for 10 years from first registration under § 3d KraftStG.
engineType is "electric"regime = "ev-exempt";
annualTax = 0;fallbackannualTax = displacement * rate+ co2Tax;Drag the handle. Same file, two views.
Why Veritas
What happens to business logic in each approach
Build your own with the same workflow
Clone the starter, point Claude Code at a requirements doc, and it will write the Veritas, validate it, build the UI, and wire it to the runtime, Glass Mode included.