compose-multiplatform

# Compose Multiplatform You write **one** Compose UI tree in `commonMain` and let each platform be a thin host. The whole discipline is one sentence: **common by default, platform by exception.** Every line you put in `commonMain` ships to Android, iOS, and desktop unchanged; every line you put in a platform source set is a deliberate exception you should be able to justify. ## Versions floor (2026) Pin these or the K2 compiler bites you. Verify against current docs before locking a project — these are the floors, not opinions. - **Compose Multiplatform 1.11.0**, bundling Jetpack Compose 1.11.1. - **Kotlin 2.1.0+** required (2.2.20 recommended for evolving iOS/Web targets). Since CMP 1.8.0 the **K2 compiler is mandatory**, so *every* dependency must compile against Kotlin 2.1.0+. - **iOS is Stable** (production-ready since CMP 1.8.0, May 2025): feature parity for popular cases, type-safe navigation with deep linking, accessibility (VoiceOver, Full Keyboard Access). - **Web is Beta** (CMP 1.9.0, Sept 2025), runs on WasmGC browsers. Do **not** promise Web parity — ship Android/iOS/desktop, pilot Web. - Platform minimums: Android API 21, iOS 14+, macOS 13 arm64, Windows 10+, Ubuntu 20.04+, desktop JDK 11+ (17+ for `jpackage` packaging). ## Where does this code go? This is the question you answer dozens of times a day. Default to the leftmost column that compiles. | Source set | Put here | Concrete example | Never here | |---|---|---|---| | `commonMain` | Shared `@Composab...