Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add cosmicstack-labs/mercury-agent-skills --skill android-kotlin-patternsgit clone --depth 1 https://github.com/cosmicstack-labs/mercury-agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/cosmicstack-labs/mercury-agent-skills/android-kotlin-patterns)<a href="https://agentmods.dev/skills/cosmicstack-labs/mercury-agent-skills/android-kotlin-patterns"><img src="https://agentmods.dev/badge/skills/cosmicstack-labs/mercury-agent-skills/android-kotlin-patterns.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00029 | $0.00463 |
| Opus 5 | $0.00015 | $0.00231 |
| Sonnet 5 | $0.00006 | $0.00093 |
| Haiku 4.5 | $0.00003 | $0.00046 |
Grade A, and why
android-kotlin-patterns scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Android Kotlin Patterns
Production Android development with Kotlin and Jetpack.
Architecture (Modern Android Dev)
Recommended Stack
- UI: Jetpack Compose with Material 3
- State: ViewModel + StateFlow
- DI: Hilt/Dagger
- DB: Room
- Network: Retrofit + OkHttp
- Async: Coroutines + Flow
- Navigation: Compose Navigation
Project Structure
app/
├── data/
│ ├── local/ (Room DAOs, entities)
│ ├── remote/ (Retrofit APIs, DTOs)
│ └── repository/
├── domain/
│ ├── model/
│ └── usecase/
├── ui/
│ ├── components/
│ ├── screens/
│ └── theme/
└── di/ (Hilt modules)
Jetpack Compose Patterns
State Hoisting
// State flows down, events flow up
@Composable
fun CounterScreen(viewModel: CounterViewModel = hiltViewModel()) {
val state by viewModel.state.collectAsStateWithLifecycle()
CounterContent(
count = state.count,
onIncrement = viewModel::increment
)
}
Performance
- Use
rememberandderivedStateOffor computations LazyColumnfor lists, notColumnwith scrolling- Stable types via
@Immutable/@Stableannotations
Play Store Submission
- Privacy Policy URL set
- App signing key backed up
- In-app reviews integrated
- Crash reporting (Firebase)
- proguard-rules.pro configured
- App bundles (.aab) for distribution
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 70 lines · 29 tokens per session scan A a64b6ec1dfbd
android-kotlin-patterns is a skill published in the GitHub repository cosmicstack-labs/mercury-agent-skills (471 stars, last pushed 14d ago), licensed MIT. It adds 29 tokens to every session and 463 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
wear-compose-m3
Expert guidance for working with Wear OS Compose Material3. Use this skill when creating, updating, or migrating Wear OS projects. This includes the androidx.wear.compose.material3, androidx.wear.compose.foundation, and androidx.wear.compose.navigation3 libraries. Also working with core components such as AppScaffold…
kotlin-tooling-agp9-migration
Migrates Kotlin Multiplatform (KMP) projects to Android Gradle Plugin 9.0+. Handles plugin replacement (com.android.kotlin.multiplatform.library), module splitting, DSL migration, and the new default project structure. Use when upgrading AGP, when build fails due to KMP+AGP incompatibility, or when the user mentions…
agent-flutter-expert
Expert Flutter specialist mastering Flutter 3+ with modern architecture patterns. Specializes in cross-platform development, custom animations, native integrations, and performance optimization with focus on creating beautiful, native-performance applications.
xcode-makefiles
Install strict Xcode Makefile tooling for iOS/macOS projects, including build/run/test scripts with AGENTNAME-based per-agent isolation under build/. Use when a project needs reproducible local CLI builds without full app scaffolding.
tauri-expert
Expert skill for Tauri (v2) development, Rust backend, IPC, and security / Panduan ahli untuk pengembangan Tauri v2, Rust backend, IPC, dan keamanan.
build-iphone-apps
Build professional native iPhone apps in Swift with SwiftUI and UIKit. Full lifecycle - build, debug, test, optimize, ship. CLI-only, no Xcode. Targets iOS 26 with iOS 18 compatibility.