Live preview, running the exact code the prompt carries
Billfold Add A Card
A card being built in front of you, where a drawn preview fills in live as the number, name, expiry and code are typed, the identity colour comes off a swatch row, and validity is computed against length and against the end of the expiry month rather than stored as a flag.
Paste into Claude Code, Cursor or Windsurf. It builds this screen 1:1 in your app.
What the prompt carriesEverything inlined, nothing fetched
- screen.tsx
- written in full, ready to paste
- 613 lines
- Inter
- Regular, Medium, Semi Bold, Bold, Extra Bold
- via @expo-google-fonts
- Integration rules
- ships 1:1, never re-themed to your app
- SDK 52+
The rule this design follows
It ships exactly as previewed: same colors, same type, same copy, same motion. The prompt tells your agent to build that, and not to adapt it to your existing theme.
