app-tester-skill

Build and maintain a navigable graph of any iOS, macOS, tvOS, or Android app's screens. Reads the project's navigation source to understand flows, instruments screen files with structured print logs and accessibility identifiers, then drives flows end-to-end via the `agent-device` CLI — using compact accessibility snapshots (no screenshots needed unless a step fails). Use when: (1) user says "test this", "test it", "test [feature/screen/flow]", "test the [flow] flow", "test all flows", "instrument screens", "update the flow graph", "rebuild the graph", "run flow tests", or "check that [feature] works end to end", (2) after adding or modifying screens or navigation logic, (3) when debugging a broken navigation flow. Works on iOS simulator + device, Android emulator + device, macOS, tvOS, and Android TV through a single CLI surface. SwiftUI / UIKit / Flutter / Expo / React Native are all supported — only the build + instrumentation step is platform-specific; UI driving is unified.