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wear-compose-m3

Guidance for Wear OS Compose Material3 (Wear Compose Material 3 / Wear Compose Material3) watch and wearable apps. Covers creating, updating, and migrating projects (Material 2.5 and Horologist migration) using androidx.wear.compose.material3, androidx.wear.compose.foundation, and androidx.wear.compose.navigation3, including AppScaffold, ScreenScaffold, TransformingLazyColumn, ambient mode, and previews.

wear/wear-compose-m3/SKILL.md

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Nov 5, 2026
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Apache-2.0

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## Prerequisites and compatibility

1. **Current Wear OS Compose version in-use:** To find the installed library version, read `gradle/libs.versions.toml` or `build.gradle.kts` directly. Don't run `./gradlew dependencies` or other shell commands to resolve versions.
2. **Wear OS Compose Material3 version:** If an internal tool is available to establish the **latest stable version** `{VERSION}` of `androidx.wear.compose:compose-material3`, use that tool.
   - Otherwise, fetch the [official Maven metadata XML](https://dl.google.com/dl/android/maven2/androidx/wear/compose/compose-material3/maven-metadata.xml) to identify `{VERSION}` (highest number, ignoring `-alpha`, `-beta`, or `-rc`).
3. **Strict compliance:** If a version is listed as stable, you MUST use it, unless overridden by the user. Do not downgrade based on initial "Unresolved reference" errors in the editor or outdated web search results.
4. **Kotlin \& Compose compiler:** Use Kotlin **2.0.0+** with the `org.jetbrains.kotlin.plugin.compose` Gradle plugin.
5. **Min SDK:** Ensure `minSdk` is at least **25**.
6. **Compile SDK \& AGP:** Ensure `compileSdk` and AGP meet the library's AAR metadata floors (`compileSdk >= 35` and `AGP >= 8.6.0` for `1.6.x`; `compileSdk >= 37` and `AGP >= 9.1.0` for `1.7.x`).

## Gotchas

1. **Mandatory sync and validation:** After updating versions in `libs.versions.toml` or `build.gradle.kts`, perform a Gradle sync (or `./gradlew assembleDebug`) before refactoring, and run `./gradlew assembleDebug` after refactoring to verify the build.
2. **Prohibition of guessing (error protocol):** If you encounter an 'Unresolved Reference' or API mismatch after a successful sync, do not attempt to 'fix' it by downgrading the library version.