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Appllama App Design Skill

A rigorous playbook for designing and shipping Expo/React Native screens that feel truly native, verified by simulator screen recordings.

Design & UIAdvanced★ 2,444⑂ 119AI score 9/10Last updated: Sep 6, 2026

What it does

  • Enforces native fidelity laws for an Expo + Expo Router + TypeScript stack: semantic colors in both themes, SF Symbols, borderCurve: 'continuous', platform type ramps, safe-area handling, haptics as punctuation, product-grade number formatting.
  • Codifies navigation semantics: push vs replace vs dismissTo, choosing modal / formSheet / fullScreenModal / transparentModal, guarding one-way doors (sign-in, onboarding, purchase) with Stack.Protected, and defining what back does on iOS and Android.
  • Anti-slop rules with a mechanical pre-flight count: one accent hue, one grey family, one radius scale, zero emoji in chrome, no unjustified gradients.
  • Motion laws: a frequency gate (high-frequency interactions get platform defaults only), sub-300ms strong ease-out timing, springs that inherit gesture velocity, Reanimated worklets on the UI thread, Reduce Motion support.
  • Also covers state architecture (TanStack Query, Zustand, MMKV), perceived performance (FlashList, skeletons, expo-image), and an image-asset generation pipeline, with depth split into five references/ docs.
  • A mandatory simulator loop: record the whole flow via xcrun simctl io booted recordVideo, watch it twice (feel, then frame-by-frame) hunting dropped frames, wrong-theme flashes, and layout jumps.

Who it's for

  • Expo / React Native developers and indie app builders.
  • Anyone whose AI-generated screens keep looking like a template.
  • Teams without a designer aiming for top-of-store UI polish.

Examples

  1. "Design the onboarding" → research reference patterns first, then land the final step with replace + Stack.Protected so back can't re-enter onboarding.
  2. "Polish this paywall" → run the anti-slop pre-flight (one accent, one radius scale, no emoji), then verify light/dark and Dynamic Type XL in the simulator.
  3. "The bottom sheet feels stiff" → hand release velocity into a spring with detents, and confirm cancel-mid-drag behavior in the recording.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/Appllama/appllama-skills/HEAD/skills/appllama-app-design-skill/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the skills/appllama-app-design-skill folder from the GitHub repo Appllama/appllama-skills into my ~/.claude/skills/appllama-app-design-skill/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/Appllama/appllama-skills.git && mkdir -p ~/.claude/skills && cp -r appllama-skills/skills/appllama-app-design-skill ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open your terminal.
  2. Clone the repo: git clone https://github.com/Appllama/appllama-skills.git
  3. Create the skills folder: mkdir -p ~/.claude/skills
  4. Copy the skill: cp -r appllama-skills/skills/appllama-app-design-skill ~/.claude/skills/
  5. Confirm the references/ markdown files came along with it.
  6. Restart Claude Code, then try a prompt like "make this screen feel native".
  7. Optional: connect the Appllama MCP for reference-screen research, and install Xcode's iOS Simulator so the motion verification pass can actually run.
View source on GitHub ↗License: MIT