Purpose

Upgrade Android build tooling in small verified steps while preserving module structure, CI and dependency compatibility.

When to use

• Migrating to AGP 9 or newer Kotlin tooling.
• Fixing Gradle sync errors after an upgrade.
• Modernizing Gradle Kotlin DSL, wrapper or version catalogs.

Inputs to inspect

• settings.gradle.kts
• Root and module build.gradle.kts files
• gradle/libs.versions.toml
• gradle/wrapper/gradle-wrapper.properties
• CI workflow files
• Compose and Firebase BoM usage