See how it works
Follow a visual map from what a customer does to the code and services that respond.
Plain-English and technical viewsNo code knowledge needed
Understand the app you built—without learning to read code.
VCAIST turns an unfamiliar project into a plain-English map, safe business controls, and early warnings you can actually understand.
✓Your project stays yours✓No automatic code changes
VYour app control roomGPT-5.6 Sol
S
✓
ShopSpring is connected27 source files checked
LIVE SANDBOXTry an order change
Customer pays$140.01
!VCAIST FOUNDA zero-item order pays the customer
Explained in plain English
✓
Safe to tryNo live data affected
4
Controls foundReady to explore
YOUR FIRST FIVE MINUTES
Four steps from “I’m afraid to touch it” to “I understand this.”
Click each step to see what VCAIST does and what you stay in control of.
STEP 1 OF 4 · START HERE
Choose where your app lives
Point VCAIST at a local folder or GitHub repository. Your original project stays untouched.
◷About 30 secondsWHAT VCAIST IS FOR
Your app, translated into decisions.
VCAIST keeps technical detail available without making you start there.
Compare two applications
Keep your current interface visible while browsing every page of another app you choose.
Side-by-side page carouselsFind surprises early
Review business errors, input limits, abuse controls, authorization, payments, and resilience in one understandable risk list.
Behavior and system-design safetyINTERACTIVE PRACTICE APP
Ready to see the moment it clicks?
Use a safe financial demo to change a price, watch revenue move, and discover why a zero-item order accidentally creates negative money.
Launch the financial demo No setup required · About 3 minutes · Nothing can breakTHE MOMENT TO LOOK FOR1 issue
!
A zero-item order pays the customer
Move the order quantity to zero and watch VCAIST explain the real pricing defect.
Expected$0.00 or moreActual−$6.99