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 instrumentation-planninggit 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/instrumentation-planning)<a href="https://agentmods.dev/skills/nexus-labs-automation/mobile-observability/instrumentation-planning"><img src="https://agentmods.dev/badge/skills/nexus-labs-automation/mobile-observability/instrumentation-planning/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/instrumentation-planning"><img src="https://agentmods.dev/badge/skills/nexus-labs-automation/mobile-observability/instrumentation-planning.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 | $0.00031 | $0.00520 |
| Opus 5 | $0.00015 | $0.00260 |
| Sonnet 5 | $0.00006 | $0.00104 |
| Haiku 4.5 | $0.00003 | $0.00052 |
Grade A, and why
instrumentation-planning 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
Instrumentation Planning
Strategic guidance for what to measure using Jobs-to-be-Done framework.
Core Question
For each user job, ask:
- Did it complete? → completion rate
- How long? → duration (p50, p95, p99)
- What failed? → error type, context
- Did they give up? → drop-off rate
Priority Tiers
| Tier | Focus | Examples |
|---|---|---|
| 1 | Crashes & errors | Crash reporting, error boundaries |
| 2 | User context | User ID, session ID, device info |
| 3 | Performance | App start, screen load, network |
| 4 | Breadcrumbs | Navigation, user actions |
| 5 | Business metrics | Funnels, feature usage |
Implementation Order
Day 1: Crash reporting + User context
Week 1: Breadcrumbs + Release tracking
Week 2: Performance spans
Month 1: Business metrics
Future-Proofing
Use OTel-compatible span/attribute names now (zero cost, easier migration later):
http.request.methodnotmethodui.screen.loadnotscreenLoadapp.start.coldnotcoldStart
See references/otel-mobile.md for full naming conventions.
Anti-Patterns
- Measure everything (noise, battery drain)
- Skip symbolication (unreadable crashes)
- Block main thread for telemetry
- Log PII in breadcrumbs
Implementation
See references/instrumentation-patterns.md for:
- Detailed 5-tier checklist
- Span naming conventions
- Sampling strategies
- Testing checklist
See references/jtbd.md for full Jobs-to-be-Done framework.
Related Skills
- See
skills/user-journey-trackingfor implementing JTBD instrumentation - See
skills/crash-instrumentationfor Tier 1 (crashes) - See
skills/symbolication-setupfor Tier 1 (readable stack traces)
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 · 76 lines · 31 tokens per session scan A 56c38dce3e80
instrumentation-planning is a skill published in the GitHub repository nexus-labs-automation/mobile-observability (116 stars, last pushed 19d ago), licensed MIT. It adds 31 tokens to every session and 520 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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