Installation

Composeum publishes three artifacts:

tech.lucam.composeum:preview-annotation:0.3.0
tech.lucam.composeum:preview-runtime:0.3.0
tech.lucam.composeum:preview-ksp:0.3.0

Recommended split:

• Add preview-annotation to every module that declares previews.
• Add preview-ksp to those same modules with ksp(...).
• Add preview-runtime only to the Android app or internal tools module that hosts the browser.

Preview-declaring module

plugins {
    id("com.google.devtools.ksp")
}

dependencies {
    implementation("tech.lucam.composeum:preview-annotation:0.3.0")
    ksp("tech.lucam.composeum:preview-ksp:0.3.0")
}

No KSP arguments are required for the default path. Composeum generates GeneratedPreviewRegistry under <first preview package>.generated.

Browser host module

dependencies {
    implementation("tech.lucam.composeum:preview-runtime:0.3.0")
}

Target support

• Stable and recommended: Android hosting via ComposeumBrowserActivity
• Stable: preview declarations from shared commonMain consumed by Android builds
• Experimental: wasm/browser hosting and opt-in Android Studio @Preview import
• Unsupported today: iOS and desktop-native browser hosts

Android-only APIs:

• ComposeumBrowserActivity
• Android ComposeumBrowser(...) overload
• DataStoreSettingsStorage
• @ViewPreview

Shared APIs:

• @ComposePreview
• @PreviewParam
• PreviewGroup
• PreviewRegistry
• Common ComposeumBrowser(...) overload