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 rcosteira79/android-skills --skill android-devgit clone --depth 1 https://github.com/rcosteira79/android-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/rcosteira79/android-skills/android-dev)<a href="https://agentmods.dev/skills/rcosteira79/android-skills/android-dev"><img src="https://agentmods.dev/badge/skills/rcosteira79/android-skills/android-dev/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/rcosteira79/android-skills/android-dev"><img src="https://agentmods.dev/badge/skills/rcosteira79/android-skills/android-dev.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00217 | $0.02847 |
| Opus 5.5 | $0.00087 | $0.01139 |
| Sonnet 5.5 | $0.00043 | $0.00569 |
| Haiku 4.5 | $0.00022 | $0.00285 |
Grade A, and why
android-dev 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Android / KMP baseline
House defaults — apply them without reminders or re-derivation; where the project's actual conventions differ, follow the project:
- DI: Hilt + KSP (or
android-skills:koinwhen the project uses Koin). Async: Coroutines/Flow — noLiveDatain new code. JSON:kotlinx.serialization. Images: Coil. - Network/local: Android uses Retrofit/OkHttp + Room; KMP shared uses Ktor + Room or SQLDelight. Retrofit is Android-only — never in a shared module.
- Modules: feature-vertical packages and modules;
:core:modelhas zero Android deps;:feature:*modules never depend on each other. - Errors: mapped to a domain type at the repository boundary — platform exceptions never leak past it; UI state explicitly models loading / success / error (see
android-skills:android-data-layer).
Skill routing
Load the specific skill for the task, always with the fully-qualified android-skills: prefix — never the short name (compose, koin, …).
| For | Load |
|---|---|
Compose detail — stability, remember, modifiers, side effects, lists, animation, navigation |
android-skills:compose |
| M3 UX — touch targets, adaptive/foldable layouts, accessibility & M3-compliance audit | android-skills:android-ux |
Coroutines & Flow — operators, Channel vs SharedFlow, structured concurrency |
android-skills:kotlin-coroutines, android-skills:kotlin-flows |
| Repository / data layer + error model | android-skills:android-data-layer |
| Networking | android-skills:android-retrofit (Android) · android-skills:kmp-ktor (KMP) |
| Paging | android-skills:paging |
| Image loading | android-skills:coil-compose |
| Preferences / typed local storage | android-skills:datastore |
KMP expect/actual boundary design |
android-skills:kmp-boundaries |
| RxJava → Coroutines/Flow migration | android-skills:rxjava-migration |
| Testing | android-skills:android-testing |
| DI with Koin | android-skills:koin |
| Build logic / convention plugins | android-skills:android-gradle-logic |
| Build speed, kapt → KSP | android-skills:gradle-build-performance |
| Debugging — Logcat, crashes, ANRs, profiling | android-skills:android-debugging |
| AOSP / AndroidX source lookup | android-skills:android-source-search |
| Multi-module visibility & module boundaries | android-skills:modularization |
| Platform PDF annotation / page-object editing (API 36.1 / SDK ext 18) | android-skills:pdf-annotations |
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.
- 1mo ago First seen · 166 lines · 217 tokens per session scan A 869a9fe82927
android-dev is a skill published in the GitHub repository rcosteira79/android-skills (159 stars, last pushed 1mo ago), licensed MIT. It adds 217 tokens to every session and 2,847 once invoked, about $0.0009 per session on Opus 5.5. 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 2026-08-30.
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