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 noloman/Android-AI-skills --skill kotlin-coroutines-best-practicesgit clone --depth 1 https://github.com/noloman/Android-AI-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/noloman/android-ai-skills/kotlin-coroutines-best-practices)<a href="https://agentmods.dev/skills/noloman/android-ai-skills/kotlin-coroutines-best-practices"><img src="https://agentmods.dev/badge/skills/noloman/android-ai-skills/kotlin-coroutines-best-practices/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/noloman/android-ai-skills/kotlin-coroutines-best-practices"><img src="https://agentmods.dev/badge/skills/noloman/android-ai-skills/kotlin-coroutines-best-practices.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00000 | $0.00295 |
| Opus 5 | $0.00000 | $0.00148 |
| Sonnet 5 | $0.00000 | $0.00059 |
| Haiku 4.5 | $0.00000 | $0.00030 |
Grade A, and why
kotlin-coroutines-best-practices 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 12d 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
name: kotlin-coroutines-best-practices description: Kotlin Coroutines & Flow best practices for Android and KMP projects. user-invocable: true
Kotlin Coroutines & Flow Best Practices
Cross-cutting skill — always activates alongside the project-type-specific skill.
Hard Rules
- No GlobalScope — use scoped coroutines (viewModelScope, lifecycleScope, custom CoroutineScope).
- No blocking calls on Dispatchers.Main.
- Structured concurrency — maintain parent-child job hierarchies.
- Cooperative cancellation — check isActive in long-running loops.
- Never catch CancellationException.
- Never swallow exceptions silently.
- Inject dispatchers — no hardcoded Dispatchers.Main in shared code.
- Prefer Flow over callbacks.
- Test coroutines with TestDispatcher + runTest.
Core Patterns
- StateFlow for UI state, SharedFlow for events.
- stateIn with WhileSubscribed(5_000) for cold-to-hot conversion.
- withContext for dispatcher switching.
- supervisorScope for isolated failure handling.
- flowOn to change upstream dispatcher.
- catch operator for upstream flow errors.
- Prefer callbackFlow over raw Channel for callback interop.
References
- references/structured_concurrency.md
- references/error_handling.md
- references/testing.md
- references/dispatchers.md
- references/flow_types.md
- references/flow_operators.md
- references/channels.md
- references/anti_patterns.md
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 12d ago First seen · 41 lines · 0 tokens per session scan A 3e54239d82c7
kotlin-coroutines-best-practices is a skill published in the GitHub repository noloman/Android-AI-skills (6 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 295 tokens. 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 2026-08-31.
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