Version-sensitive. Every API name, SDK gate and browser-support claim below was verified on 2026-09-08 against primary sources. What against, and when, is in . If that date is old, re-verify before acting on a version number. Compose Motion - Sub-skill Jetpack Compose animation core. Loaded for Android Compose and Compose Multiplatform projects. Concise rules here. Deep-dive in . Baseline: Jetpack Compose 1.12 (1.12.1 current stable, Sep 2026) - i.e. Compose BOM 2026.09.00. Modern stable APIs only - no , no hacks where is correct. Anything below flagged 'Compose 1.x+' is a since marker, not t…