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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.
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
Continue iterative work from the last ACCEPTED result plus only the new requested change, instead of replaying the conversation. Use during long multi-turn editing of a document, config, or code file; when the user says "keep going from what we had", asks for a follow-up change to something already approved, or is near plan/token limits in an iterative session. Saves one integrity-checked accepted result, builds a minimal continuation prompt, and never carries rejected drafts or transcript history forward.
Use this when: my tests keep failing randomly, write tests for this code, tests pass locally but fail in CI, how do I mock an HTTP call, my test suite is too slow, debug a failing test, increase test coverage, how do I test a database query, write e2e tests for a user journey, run load tests against my API, set up a test framework, add TDD to my workflow, pytest, Vitest, evaluate my agent, LLM eval, agent flaky, RAG eval, prompt regression, hallucination test, Pass@N, LLM-as-Judge, trace agent execution, test my LangGraph agent, agent guardrails, eval dataset, mock agent tools, agent cost ceiling
Use this when: my API keeps returning 401 or 403, getting 429 rate limit errors, integrate a third-party API, my requests keep timing out, add retry logic with backoff, design a REST API, handle OAuth2 authentication, paginate API responses, CORS errors blocking my requests, secure API keys properly, build consistent error responses, my webhook isn't receiving events, OpenAPI, JWT, circuit breaker, idempotency key, API versioning, rate limiting, token refresh
Use this when: my pipeline is failing, set up CI, speed up my build, why is CI slow, cache miss every build, automate releases, set up GitHub Actions, self-hosted runner not connecting, fix my build, run jobs in parallel, deploy on every merge, build and push Docker image, my workflow is flaky, release automation, test pipeline locally before pushing, OIDC auth in CI, semantic versioning
Use this when: review my code, what's wrong with this function, find bugs before they hit production, is this code secure, check for SQL injection, my error handling is wrong, find edge cases I missed, improve this messy code, this PR needs a review, catch performance problems, my code might have a security vulnerability, refactor this for readability, is this logic doing the right thing, N+1 query, race condition, resource leak, mutable default args, unhandled promise
Use this when: build a data pipeline, my pipeline is not idempotent, clean messy data, convert CSV to Parquet, my data has duplicates, validate schema at ingestion, pipeline fails on re-run, process files larger than memory, schedule a recurring job, upstream schema changed and broke my pipeline, migrate data between systems, query Parquet without loading it, deduplicate records, batch vs stream processing, DuckDB for analytics, choose an orchestrator, slow pandas pipeline
| 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"]} |
See the AGP 9 migration guide for the major changes, many breaking, in AGP 9 compared to AGP 8.
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.
If AGP is already at 9 or higher, then do the following:
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.
See the guide for detailed information.
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.
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.
If any Android module contains custom BuildConfig fields, see BuildConfig for detailed information.
After the migration, check gradle.properties. Remove the following flags:
Additionally, delete all temporary files you've created.
android.disallowKotlinSourceSets=false to gradle.properties.clean task. This is a waste of time.After migration, verify the following:
./gradlew help succeeds../gradlew build --dry-run succeeds.Paparazzi v2.0.0-alpha04 and lower versions have issues with AGP 9. See references/paparazzi-gradle-9.md for details.
Use the currently available local toolchain for automation-first Android validation:
adb, emulator, repo ./gradlew / ./gradlew.bat, java, python3, node, npm, bun, aapt, aapt2, ghandroid CLI binary, sdkmanager, avdmanager, maestro, apkanalyzer, bundletoolRecommended unattended validation loop:
:core:test, :app:test, :app:assembleDebug, :app:lintadb devices), run connected instrumentation:
:app:connectedDebugAndroidTest.sisyphus/evidence/.ComposeTimeoutExceptionNo compose hierarchies foundNo connected devices, device ... not found)For managed devices where keep-awake cannot be enabled, use a sleep-tolerant loop:
PASS / FAIL / SKIP(no-device)