Android Gradle Build Logic

This handles the Gradle build configuration side of Android projects: version catalogs, plugin setup, convention patterns, and AGP compatibility. You'd reach for it when you're wiring up build logic across modules, migrating to catalog-based dependency management, or fixing toolchain issues that break your Android builds. It's scoped deliberately narrow to keep architectural refactors and product features out of scope, which means you won't accidentally mix infrastructure work with behavior changes. The skill validates against two showcase apps, one Compose and one XML based, and knows when to hand off to modernization or CI skills. Solid choice if you want build changes that stay boring and don't sprawl.