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 nexus-labs-automation/mobile-observability --skill navigation-latencygit clone --depth 1 https://github.com/nexus-labs-automation/mobile-observabilityWrote 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/nexus-labs-automation/mobile-observability/navigation-latency)<a href="https://agentmods.dev/skills/nexus-labs-automation/mobile-observability/navigation-latency"><img src="https://agentmods.dev/badge/skills/nexus-labs-automation/mobile-observability/navigation-latency/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/nexus-labs-automation/mobile-observability/navigation-latency"><img src="https://agentmods.dev/badge/skills/nexus-labs-automation/mobile-observability/navigation-latency.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 | $0.00030 | $0.00371 |
| Opus 5 | $0.00015 | $0.00186 |
| Sonnet 5 | $0.00006 | $0.00074 |
| Haiku 4.5 | $0.00003 | $0.00037 |
Grade A, and why
navigation-latency 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
Navigation Latency
Time from tap to destination screen interactive (TTI).
Phases
TAP → TRANSITION → VIEW_INIT → DATA_LOAD → INTERACTIVE
|_____________________________________________|
Navigation Latency
When to Use
- Tab bar taps
- List item → detail screen
- Deep link → target screen
- Any screen-to-screen transition
Key Thresholds
| Rating | Duration |
|---|---|
| Good | <400ms |
| Acceptable | <1s |
| Poor | >1s |
Measurement Points
onNavigationStart- user taps (source screen)onViewAppear- destination view visibleonContentReady- data loaded, interactive
Implementation
See references/ui-performance.md (Navigation Latency section) for:
- iOS: NavigationLatencyTracker with os_signpost
- Android: Fragment/Activity lifecycle hooks
- React Native: React Navigation listeners
Common Mistakes
- Measuring only view appear (missing data load)
- Not correlating source → destination
- Ignoring warm vs cold screen loads
Related Skills
- See
skills/interaction-latencyfor button/tap response times (vs full screen loads) - Combine with
skills/user-journey-trackingto correlate navigation with user intent
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 · 64 lines · 30 tokens per session scan A 99219f4ee2fc
navigation-latency is a skill published in the GitHub repository nexus-labs-automation/mobile-observability (116 stars, last pushed 19d ago), licensed MIT. It adds 30 tokens to every session and 371 once invoked, about $0.0002 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 2026-08-30.
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