An Expo app can feel native if every animation runs on the UI thread, every gesture hands its velocity to the spring that finishes it, and you use the system's own sheets instead of drawing your own. In 6pm that means Reanimated 4 worklets, Gesture Handler, Expo Router form sheets, and four kinds of haptic, each used for one job.

6pm is a daily money app. Its core moment, "the close", is a stack of receipt cards you swipe through at 6pm: right to keep, left to edit, down for "not mine". The last card stamps the day CLOSED. If that swipe feels like a web page, the product fails. So our agent contract (the CLAUDE.md at the repo root) opens with this:

Native feel is the product. UI-thread animation only (Reanimated worklets, Gesture Handler). Every state change animates with the prototype's curve. No layout jumps, no blank frames, no JS-thread Animated .

Here is how that rule turns into code.…