📋 Shared instructions: shared-instructions.md — read first.

Add Native Capability

Generate a one-file typed wrapper under src/native/ for a native device capability that the upstream template already ships. Screens import the wrapper instead of touching Expo modules directly, so the discriminated-union result contract stays consistent across the app.

Hard rules — do NOT cross these lines

1. Never run npx expo install, npm install, or yarn add for a native module. The set of native modules in package.json is fixed by the upstream template. Adding a new one breaks the rewrap pipeline (the customer's binary is built from a pre-built base, not from their package.json).
2. Never edit app.config.js — plugins, ios.infoPlist, android.permissions, or anything else. All native config the template ships is intentional and signed off; arbitrary additions cannot be honored at rewrap time.
3. Never edit package.json dependencies for native modules (anything starting with expo-, react-native-, or that ships an iOS/Android folder). Generic JS-only libraries (e.g., date-fns, zod, @tanstack/react-query) are not native modules and remain fine to install via npx expo install <pkg> from other skills — this rule scopes only to packages with a config plugin or native code.
4. If the requested module isn't actually present in package.json — STOP. That means the upstream template hasn't shipped it yet; do not work around by installing it.

Routing — /add-native is the public entry point

Some capabilities have a dedicated implementation helper that does more than a plain wrapper (camera writes scanner/upload helpers; PDF report/viewer helpers enforce local-vs-HTTPS boundaries; pen has native-control-specific validation). Users should still call /add-native <capability> for native controls. When a dedicated implementation exists, run it internally and do not ask the user to run that helper directly.

Lookup convention: after normalizing the capability, first check the internal-helper map below. For camera, image-picker, barcode-scanner, and qr-scanner, read and execute ${CLAUDE_SKILL_DIR}/add-camera/SKILL.md inside this /add-native invocation. For pdf-report, read and execute ${CLAUDE_SKILL_DIR}/add-pdf-report/SKILL.md. For pdf-viewer, read and execute ${CLAUDE_SKILL_DIR}/add-pdf-viewer/SKILL.md. For pen-input, read and execute ${CLAUDE_SKILL_DIR}/add-pen-input/SKILL.md. For geolocation, read and execute ${CLAUDE_SKILL_DIR}/add-geolocation/SKILL.md. If no helper exists, fall through to this skill's inline wrapper flow.