android-concurrency

android-concurrency is a skill for Claude Code, Codex from HoangNguyen0403/agent-skills-standard. It costs 59 tokens per session (378 once invoked), scanned A, original, MIT.

An Android development guide for writing safe Kotlin coroutines, which are a way to run work without blocking the app, and for observing changing data during the app lifecycle.

In plain words
What is it for?
Use it when writing suspend functions, choosing coroutine scopes, injecting dispatchers, or collecting Flow, StateFlow, and SharedFlow data in Android screens.
Why use it?
It helps prevent work from continuing after a screen is gone, makes background work easier to test, and avoids common coroutine leaks and threading mistakes.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when writing suspend functions, choosing coroutine scopes, injecting dispatchers, or collecting Flow, StateFlow, and SharedFlow data in Android screens.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hoangnguyen0403/agent-skills-standard/android-concurrency
Install

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.

Any agent
npx skills add HoangNguyen0403/agent-skills-standard --skill android-concurrency
Clone the repo
git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for android-concurrency

README.md
[![agentmods](https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/android-concurrency/github.svg)](https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/android-concurrency)
Your own site
<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/android-concurrency"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/android-concurrency/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.

agentmods 80×15 button for android-concurrency

Your own site · 80×15
<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/android-concurrency"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/android-concurrency.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 378 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00059 $0.00378
Opus 5 $0.00030 $0.00189
Sonnet 5 $0.00012 $0.00076
Haiku 4.5 $0.00006 $0.00038

Measured 9d ago against content hash 9ce59f05b769, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

android-concurrency 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 9d 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.

skills/android/android-concurrency/SKILL.md · 51 lines

What it actually says

Android Concurrency Standards

Priority: P0 (CRITICAL)

Implementation Guidelines

Structured Concurrency

  • Scopes: Always use viewModelScope (VM) or lifecycleScope (Activity/Fragment).
  • Dispatchers: INJECT Dispatchers (DispatcherProvider) for testability. not hardcode Dispatchers.IO.

Flow usage

  • Cold Streams: Use Flow for data streams.
  • Hot Streams: Use StateFlow (State) or SharedFlow (Events).
  • Replay: Use SharedFlow with replay only when late subscribers must receive recent events.
  • Collection: Use collectAsStateWithLifecycle() (Compose) or repeatOnLifecycle (Views).

Anti-Patterns

  • No GlobalScope: Use viewModelScope or lifecycleScope — never GlobalScope.
  • No async/await by default: Prefer simple suspend functions; async only for parallel calls.

References

Canonical response anchors

  • Additional task-grounded exact anchors: hardcode
Files

What ships with it

2 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.

Changes

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.

  1. 9d ago First seen · 51 lines · 59 tokens per session scan A 9ce59f05b769

Subscribe to this mod's changes

android-concurrency is a skill published in the GitHub repository HoangNguyen0403/agent-skills-standard (565 stars, last pushed 3d ago), licensed MIT. It adds 59 tokens to every session and 378 once invoked, about $0.0003 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.

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