01
Build adaptive Compose interfaces
Create reusable composables, state holders, navigation, theming, previews, accessibility semantics, and layouts that adjust across phones, tablets, and foldables.
Modern Android workflow
CategoryMobile Development
Codex Skills for Android Development
Codex Skills for Android Development help Codex build Kotlin features, Jetpack Compose interfaces, layered app architecture, automated tests, Gradle changes, and release checks with the whole Android project in view. Download the skills and adapt them to your modules, libraries, devices, and engineering standards.
KotlinJetpack ComposeApp architectureGradle
01
02
03
04
05
06
07
08
09
02
03
04
05
06
07
08
09
task: add saved articles
inspect:
- UI state
- repository layer
- navigation tests
verify: Gradle + emulatorAndroid changes cross lifecycles and layers
A screen can look correct and still fail when the device rotates, reconnects, or restores state.
Android apps run across different screen sizes, configurations, process lifecycles, resource limits, and network conditions. Feature work often touches Compose, ViewModels, repositories, persistence, navigation, manifests, dependency injection, Gradle, and tests.
These skills give Codex an Android-specific process for tracing state and events through the application, respecting module boundaries, and verifying behavior beyond the happy path.
What the downloadable skills can do
What Codex Skills for Android Development can help Codex deliver
02
Work within layered app architecture
Keep UI, data, and optional domain responsibilities clear while using repositories, ViewModels, coroutines, flows, and dependency injection consistently.
03
Handle persistence and offline behavior
Connect network and local data sources, define a single source of truth, preserve important state, and make errors or synchronization visible to users.
04
Test and prepare Android builds
Add unit, Compose UI, navigation, and integration checks, then verify Gradle tasks, build variants, manifests, shrinking, and release requirements.
An Android-aware build loop
Trace the feature through UI state, data, lifecycle, and build configuration
Codex first maps the modules, architecture, dependencies, source sets, build variants, and test setup. The implementation plan then follows the way the app already moves data and events.
workflow.statusREADY
Context → Plan → Work → Verify
01
Inspect modules and architecture
Find the UI toolkit, navigation, state holders, repositories, data sources, dependency injection, Gradle conventions, and app entry points.
02
Model state and events
Define observable UI state, user events, data ownership, lifecycle behavior, loading, errors, retries, and restoration before wiring the screen.
03
Implement across the right layers
Keep Android framework dependencies contained, reuse existing abstractions, and avoid placing data or business rules directly in UI components.
04
Run Android-specific checks
Compile relevant variants, run unit and device tests, check navigation and configuration changes, and review performance-sensitive Compose code.
Useful across Android projects
Adapt the skills to the toolkit and app shape you already use
Modern guidance can coexist with established code. The skill should follow the project’s current architecture unless a migration is explicitly requested.
Jetpack Compose apps
Build state-driven screens, reusable composables, adaptive navigation, previews, semantics, and Compose UI tests.
View-based applications
Work with activities, fragments, XML layouts, ViewModels, navigation, lifecycle handling, and gradual Compose adoption.
Data-heavy apps
Coordinate repositories, Room, network services, caching, synchronization, pagination, background work, and offline-first behavior.
Multi-module projects
Respect module APIs, dependency direction, build logic, feature boundaries, test fixtures, and shared platform code.
Common Android assignments
Use the skills for new features, hard bugs, and release work
Each task starts from the project’s Android version, architecture, modules, and supported devices.
01Build a Jetpack Compose feature
02Add ViewModel state and event handling
03Connect Room and a network data source
04Implement offline-first synchronization
05Debug lifecycle or configuration issues
06Add navigation and Compose UI tests
07Update Gradle dependencies safely
08Prepare a release build and checklist
A strong fit
Who Is This For?
These skills are for developers who want Codex to reason about Android-specific architecture, lifecycle, devices, and build tooling.
Android developers
Use Codex for Kotlin features, Compose UI, architecture changes, debugging, testing, and Gradle work inside real applications.
Mobile product teams
Turn feature requirements into Android implementation plans that cover state, devices, accessibility, and failure modes.
Teams modernizing legacy apps
Plan incremental moves toward Compose or layered architecture without pretending the existing View code does not exist.
Independent app builders
Keep small applications organized as they grow across persistence, background work, testing, and Play release requirements.
Good to know:
The skills improve implementation discipline, but device testing, security review, Play policy compliance, signing, and release approval still need direct human ownership.
Add the Android workflow to Codex
Installation Guide
Install the skills inside one Android repository or make the workflow available across multiple mobile projects.
Download and extract the Android skills
Keep each SKILL.md file with its Gradle checks, Android references, test guidance, and supporting scripts.
Choose project or personal scope
Use a repository skill for app-specific modules and commands, or the user location for a reusable Android workflow.
Add the app’s technical profile
Record Kotlin and Android versions, Compose usage, architecture, modules, build variants, supported devices, and required Gradle tasks.
Open Codex at the Android project root
Codex detects installed skills automatically. Restart Codex if the skill does not appear.
Start with a bounded Android task
Name the feature, affected module, UI toolkit, state behavior, data needs, supported form factors, and required tests.
Before you download
Frequently Asked Questions
Answers about Kotlin, Compose, existing apps, device tests, Gradle, and release work.
Do the skills require Jetpack Compose?+
No. They support modern Compose projects and existing View-based applications. The workflow follows the current codebase unless you request a migration.
Can they work with a multi-module Android project?+
Yes. Add module boundaries, dependency rules, shared build logic, and test commands so Codex can plan changes without collapsing the architecture.
Do they cover Kotlin coroutines and Flow?+
Yes. The workflow can guide asynchronous work, lifecycle-aware collection, state exposure, cancellation, threading, and tests based on the project’s conventions.
Can Codex run emulator or device tests?+
It can when the environment provides the emulator, device, commands, and permission. The skills also distinguish local unit tests from instrumented and Compose UI tests.
Will the skills publish an app to Google Play?+
They can help prepare builds and release checks, but signing credentials, policy review, store listings, and the final production release need authorized human control.
Build for the Android system around the screen
Give Codex an Android workflow that respects state, architecture, devices, tests, and Gradle.
Adaptive interfaces. Clear data ownership. Better lifecycle handling. Builds you can verify.