# pad_scanner CLAUDE.md

## Branch Strategy

- The main branch is `master`, always kept in a releasable state
- All new feature development must be done on a `dev` branch, created from `master`
- After verification, merge `dev` back into `master`

## App Installation Rules

**Always use `adb install -r` to install the app. Never use `flutter install`.**

`flutter install` uninstalls the old version first, which wipes app configuration (API URL, sound file paths, etc.). `adb install -r` performs an in-place upgrade that preserves all app data.

### Installation Steps

```bash
# 1. Build
flutter build apk --release

# 2. Install (in-place upgrade, preserves config)
adb install -r build/app/outputs/flutter-apk/app-release.apk
```

## Flutter Test Rules

Before running `flutter test`, temporarily remove proxy environment variables for the current shell. The Flutter tester uses a localhost WebSocket, and proxy settings can break that connection with `Invalid WebSocket upgrade request`.

### PowerShell

```powershell
$env:HTTP_PROXY=''
$env:HTTPS_PROXY=''
$env:NO_PROXY='localhost,127.0.0.1,::1'
flutter test
```