Individual skill

compose-multiplatform

Use when building one shared Compose UI in Kotlin across Android, iOS, and desktop — commonMain @Composables, expect/actual, source-set placement, native interop, multiplatform ViewModel/navigation/Koin. NOT a single-platform native build (that is kotlin-android / swift-ios), and NOT Dart/Flutter cross-platform UI (that is flutter).

skills/compose-multiplatform/SKILL.md

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Last checked: Nov 6, 2026

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Repository stars (not skill ratings): 548
Repository last updated: Nov 4, 2026
License: MIT

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agent-skills Repository topic
agentic-ai Repository topic
ai-agents Repository topic
ai-coding Repository topic
claude-code Repository topic
cli Repository topic
cline Repository topic
codex Repository topic
coding-assistant Repository topic
cursor Repository topic
kotlin Declared skill tag
kmp Declared skill tag
compose-multiplatform Declared skill tag
cross-platform Declared skill tag
shared-ui Declared skill tag
expect-actual Declared skill tag
ios Declared skill tag
android Declared skill tag
design Derived category
design-interface Derived category

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SKILL.mdcore · 10,748 bytes
SKILL.mdcore · 10,748 bytes
SKILL.mdcore · 10,748 bytes
SKILL.mdcore · 10,748 bytes
evals/README.mddoc · 686 bytes
evals/cases.yamlasset · 3,056 bytes
references/ios-interop.mddoc · 3,297 bytes
references/project-setup.mddoc · 4,002 bytes
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# 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).