agp-9-upgrade

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Aktualisiert24. Mai 2026 um 14:10

Use this when: upgrade AGP, migrate Android Gradle Plugin, AGP version upgrade, AGP 9 migration, update build.gradle AGP version, Android build plugin upgrade, gradle plugin compatibility. Upgrades, or migrates, an Android project to use Android Gradle Plugin (AGP) version 9. Do not use this skill for migrating Kotlin Multiplatform (KMP) projects.

Installation

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drewid74

drewid74/ai_skills

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SKILL.md

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name	agp-9-upgrade
description	Use this when: upgrade AGP, migrate Android Gradle Plugin, AGP version upgrade, AGP 9 migration, update build.gradle AGP version, Android build plugin upgrade, gradle plugin compatibility. Upgrades, or migrates, an Android project to use Android Gradle Plugin (AGP) version 9. Do not use this skill for migrating Kotlin Multiplatform (KMP) projects.
license	Complete terms in LICENSE.txt
metadata	{"author":"Google LLC","last-updated":"2026-04-17","keywords":["Android Gradle Plugin 9","AGP 9","AGP Upgrade","AGP Migration","New AGP DSL","Migrate to built-in Kotlin"]}

Migration guide

See the AGP 9 migration guide for the major changes, many breaking, in AGP 9 compared to AGP 8.

Requirements

If the user requests to update or migrate to AGP 9, first check the AGP version used in the project. If it is lower than 9, stop and ask the user to run the AGP Upgrade Assistant in Android Studio to update to the latest stable version of AGP, and confirm when done. The user may also request that this requirement be skipped; if this is the case, you should update the version of AGP to the latest stable version as part of the AGP 9 migration. See the AGP 9 migration guide for how to do this.

Each version of AGP has its own set of compatibilities with other tools, such as Gradle, JDK, and Kotlin. The release notes for each of these versions will include a Compatibility table indicating the minimum versions for these tools.

Do not use this skill for KMP projects, as they are unsupported.

Steps

If AGP is already at 9 or higher, then do the following:

Step 1: Update dependencies

If KSP (com.google.devtools.ksp) is used in the project, ensure it is on version 2.3.6 or higher.

If Hilt is used in the project, ensure it is on version 2.59.2 or higher.

Step 2: Migrate to built-in Kotlin

See the guide for detailed information.

Step 3. Migrate to the new AGP DSL

See the guide for detailed information.

See also gradle-recipes for examples on how to migrate old code to code that is compatible with AGP 9 and the new DSL.

Step 4. Migrate kapt to KSP or legacy-kapt

If KSP (com.google.devtools.ksp) or kapt (org.jetbrains.kotlin.kapt) are used in the project, see KSP, kapt, and legacy-kapt for detailed migration steps.

Step 5. BuildConfig

If any Android module contains custom BuildConfig fields, see BuildConfig for detailed information.

Step 6. Update gradle.properties

After the migration, check gradle.properties. Remove the following flags:

android.builtInKotlin
android.newDsl
android.uniquePackageNames
android.enableAppCompileTimeRClass

Additionally, delete all temporary files you've created.

Guidelines

Never write or run python scripts.
Only search the Gradle dependency cache when inspecting external dependencies, and only as a last resort.
Never add android.disallowKotlinSourceSets=false to gradle.properties.
When verifying changes, don't run the clean task. This is a waste of time.

Verification

After migration, verify the following:

Gradle IDE sync succeeds.
./gradlew help succeeds.
./gradlew build --dry-run succeeds.

Troubleshooting

Paparazzi v2.0.0-alpha04 and lower versions have issues with AGP 9. See references/paparazzi-gradle-9.md for details.

Automated / AI-Assisted Testing Tooling (local baseline)

Use the currently available local toolchain for automation-first Android validation:

Primary tools available: adb, emulator, repo ./gradlew / ./gradlew.bat, java, python3, node, npm, bun, aapt, aapt2, gh
Commonly referenced but currently unavailable in PATH: android CLI binary, sdkmanager, avdmanager, maestro, apkanalyzer, bundletool

Recommended unattended validation loop:

Run deterministic gates each iteration:
- :core:test, :app:test, :app:assembleDebug, :app:lint
If a device is present (adb devices), run connected instrumentation:
- :app:connectedDebugAndroidTest
Persist per-iteration logs and summaries under .sisyphus/evidence/.
Bucket failures by signature (for flaky analysis), especially:
- ComposeTimeoutException
- No compose hierarchies found
- device transport errors (No connected devices, device ... not found)

For managed devices where keep-awake cannot be enabled, use a sleep-tolerant loop:

continue non-device gates every cycle
classify connected runs as PASS / FAIL / SKIP(no-device)
avoid treating temporary device sleep as total run failure.

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name	agp-9-upgrade
description	Use this when: upgrade AGP, migrate Android Gradle Plugin, AGP version upgrade, AGP 9 migration, update build.gradle AGP version, Android build plugin upgrade, gradle plugin compatibility. Upgrades, or migrates, an Android project to use Android Gradle Plugin (AGP) version 9. Do not use this skill for migrating Kotlin Multiplatform (KMP) projects.
license	Complete terms in LICENSE.txt
metadata	{"author":"Google LLC","last-updated":"2026-04-17","keywords":["Android Gradle Plugin 9","AGP 9","AGP Upgrade","AGP Migration","New AGP DSL","Migrate to built-in Kotlin"]}

Migration guide

See the AGP 9 migration guide for the major changes, many breaking, in AGP 9 compared to AGP 8.

Requirements

Do not use this skill for KMP projects, as they are unsupported.

Steps

If AGP is already at 9 or higher, then do the following:

Step 1: Update dependencies

If KSP (com.google.devtools.ksp) is used in the project, ensure it is on version 2.3.6 or higher.

If Hilt is used in the project, ensure it is on version 2.59.2 or higher.

Step 2: Migrate to built-in Kotlin

See the guide for detailed information.

Step 3. Migrate to the new AGP DSL

See the guide for detailed information.

See also gradle-recipes for examples on how to migrate old code to code that is compatible with AGP 9 and the new DSL.

Step 4. Migrate kapt to KSP or legacy-kapt

If KSP (com.google.devtools.ksp) or kapt (org.jetbrains.kotlin.kapt) are used in the project, see KSP, kapt, and legacy-kapt for detailed migration steps.

Step 5. BuildConfig

If any Android module contains custom BuildConfig fields, see BuildConfig for detailed information.

Step 6. Update gradle.properties

After the migration, check gradle.properties. Remove the following flags:

android.builtInKotlin
android.newDsl
android.uniquePackageNames
android.enableAppCompileTimeRClass

Additionally, delete all temporary files you've created.

Guidelines

Never write or run python scripts.
Only search the Gradle dependency cache when inspecting external dependencies, and only as a last resort.
Never add android.disallowKotlinSourceSets=false to gradle.properties.
When verifying changes, don't run the clean task. This is a waste of time.

Verification

After migration, verify the following:

Gradle IDE sync succeeds.
./gradlew help succeeds.
./gradlew build --dry-run succeeds.

Troubleshooting

Paparazzi v2.0.0-alpha04 and lower versions have issues with AGP 9. See references/paparazzi-gradle-9.md for details.

Automated / AI-Assisted Testing Tooling (local baseline)

Use the currently available local toolchain for automation-first Android validation:

Primary tools available: adb, emulator, repo ./gradlew / ./gradlew.bat, java, python3, node, npm, bun, aapt, aapt2, gh
Commonly referenced but currently unavailable in PATH: android CLI binary, sdkmanager, avdmanager, maestro, apkanalyzer, bundletool

Recommended unattended validation loop:

Run deterministic gates each iteration:
- :core:test, :app:test, :app:assembleDebug, :app:lint
If a device is present (adb devices), run connected instrumentation:
- :app:connectedDebugAndroidTest
Persist per-iteration logs and summaries under .sisyphus/evidence/.
Bucket failures by signature (for flaky analysis), especially:
- ComposeTimeoutException
- No compose hierarchies found
- device transport errors (No connected devices, device ... not found)

For managed devices where keep-awake cannot be enabled, use a sleep-tolerant loop:

continue non-device gates every cycle
classify connected runs as PASS / FAIL / SKIP(no-device)
avoid treating temporary device sleep as total run failure.