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 HoangNguyen0403/agent-skills-standard --skill android-legacy-navigationgit clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standardWrote 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/hoangnguyen0403/agent-skills-standard/android-legacy-navigation)<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/android-legacy-navigation"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/android-legacy-navigation/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/hoangnguyen0403/agent-skills-standard/android-legacy-navigation"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/android-legacy-navigation.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 | $0.00049 | $0.00308 |
| Opus 5.5 | $0.00020 | $0.00123 |
| Sonnet 5.5 | $0.00010 | $0.00062 |
| Haiku 4.5 | $0.00005 | $0.00031 |
Grade A, and why
android-legacy-navigation 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.
What it actually says
Android Legacy Navigation Standards
Priority: P1 (HIGH)
1. Set Up Single-Activity Architecture
- Use one Host Activity with
NavHostFragment. - Enable SafeArgs plugin — MANDATORY for passing data between fragments.
See XML graph & SafeArgs examples for NavHostFragment setup.
2. Manage Navigation Graphs
- Nested Graphs: Modularize
navigation/resources (e.g.,nav_auth.xml,nav_main.xml) to keep graphs readable. - Deep Links: Define explicit
<deepLink>in graph, not AndroidManifest intent filters.
3. Navigate with SafeArgs
See XML graph & SafeArgs examples for type-safe navigation usage.
Anti-Patterns
- No Raw String Bundle Keys: Use SafeArgs generated type-safe classes.
- No Manual Fragment commit(): Use NavController for all navigation.
References
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.
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 · 41 lines · 49 tokens per session scan A a0e7329c4594
android-legacy-navigation is a skill published in the GitHub repository HoangNguyen0403/agent-skills-standard (582 stars, last pushed today), licensed MIT. It adds 49 tokens to every session and 308 once invoked, about $0.0002 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 2026-09-03.
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