Kotlin Concurrency Expert

new-silvermoon/awesome-android-agent-skills

This one tackles the messy reality of Kotlin coroutines in Android: ANRs from blocking the main thread, memory leaks from GlobalScope, zombie coroutines outliving their ViewModels, and the deprecated launchWhenStarted pattern that still haunts older codebases. It pushes you toward dispatcher injection for testability, repeatOnLifecycle for safe Flow collection, and proper CancellationException handling. The workflow is triage first, then apply the smallest fix that gets you to structured concurrency without rewriting everything. If you're debugging why your app freezes on rotation or why background work never cancels, this covers the common patterns and anti-patterns with specific before-and-after examples.

skills.sh installs: 684
GitHub stars: 1K
last updated: Aug 21, 2026

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Install

$ npx -y skills add new-silvermoon/awesome-android-agent-skills --skill kotlin-concurrency-expert --agent claude-code

Installs into .claude/skills of the current project.

Files

Kotlin Concurrency Expert

Overview

Review and fix Kotlin Coroutines issues in Android codebases by applying structured concurrency, lifecycle safety, proper scoping, and modern best practices with minimal behavior changes.

Workflow

1. Triage the Issue

Capture the exact error, crash, or symptom (ANR, memory leak, race condition, incorrect state).
Check project coroutines setup: kotlinx-coroutines-android version, lifecycle-runtime-ktx version.
Identify the current scope context (viewModelScope, lifecycleScope, custom scope, or none).
Confirm whether the code is UI-bound (Dispatchers.Main) or intended to run off the main thread (Dispatchers.IO, Dispatchers.Default).
Verify Dispatcher injection patterns for testability.