CodeKeyboard

A split, column-staggered Android keyboard (IME) for coders, with a matching React Native in-app keyboard.

Two physical layouts, selectable from the app:

Sofle V5 (5×4 + 5 thumb keys)	Ferris Sweep (5×3 + 2 thumb keys)

Column-staggered split layout with ZMK-style layers, home row mods, and thumb layer-holds.

• 5 layers: base, lower, raise, adjust, func
• Hold-tap: home row mods (a/s/d/f/h/j/k/l) and thumb layer-holds
• Tri-layer: hold LWR+RSE simultaneously for ADJ/FUNC (Ferris Sweep)
• Double-tap to LOCK modifiers and layers
• Backspace and Space auto-repeat (400ms initial, 50ms repeat)
• Native IME service with canvas rendering (no WebView)
• React Native in-app keyboard fed layout through a native bridge

Push to master -- GitHub Actions builds app-release.apk automatically.

cd android && ./gradlew assembleRelease

CodeKeyboard/
  src/                   React Native app (Keyboard, Settings, Themes)
  android/app/src/main/java/com/codekeyboard/   Native IME (Kotlin)
    KeyboardLayout.kt      KeyDef, KeyRect, PositionedKey
    KeyboardState.kt       Modifier/layer state machine + hold-tap state
    NativeKeyboardView.kt  Canvas renderer + touch handler
    SofleKeyData.kt        Layer key definitions (5 layers, V5)
    SofleLayoutComputer.kt Geometry calculator
    TapMachine.kt          Double-tap detector
    CodeKeyboardIME.kt     IME service entry point
    CodeKeyboardModule.kt  RN native bridge

• PLAN.md -- full project plan
• GESTURE_ARCHITECTURE.md -- tap/double-tap/hold-tap pipeline
• UX_DESIGN.md -- design decisions