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 EliasOulkadi/shokunin --skill performance-profilergit clone --depth 1 https://github.com/EliasOulkadi/shokuninWrote 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/eliasoulkadi/shokunin/performance-profiler)<a href="https://agentmods.dev/skills/eliasoulkadi/shokunin/performance-profiler"><img src="https://agentmods.dev/badge/skills/eliasoulkadi/shokunin/performance-profiler/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/eliasoulkadi/shokunin/performance-profiler"><img src="https://agentmods.dev/badge/skills/eliasoulkadi/shokunin/performance-profiler.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 6 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 55 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 56 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 238 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 192 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 195 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 239 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00118 | $0.02842 |
| Opus 5.5 | $0.00047 | $0.01137 |
| Sonnet 5.5 | $0.00024 | $0.00568 |
| Haiku 4.5 | $0.00012 | $0.00284 |
Grade A, and why
performance-profiler 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 — 305 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Performance Profiler
Find and fix performance issues from frontend to backend. Based on Google Core Web Vitals, Lighthouse, Chrome DevTools, and production patterns from WebPageTest and clinic.js.
Sub-Commands
| Command | Description |
|---|---|
audit |
Run comprehensive performance audit (frontend + backend) |
vitals |
Audit Core Web Vitals specifically (LCP, INP, CLS, TBT) |
lcp |
Optimize Largest Contentful Paint |
inp |
Fix Interaction to Next Paint (long tasks) |
bundle |
Analyze bundle size and split strategy |
backend |
Profile Node.js/Python backend performance |
budget |
Set and verify performance budgets |
Workflow
Step 1: Run Lighthouse audit (exact command)
npx lighthouse https://example.com --preset=desktop --output=html --output-path=./lighthouse-report.html
npx lighthouse https://example.com --preset=desktop --output=json --output-path=./lighthouse.json
Target scores:
| Metric | Target | Severity if missed |
|---|---|---|
| Performance | > 90 | Critical |
| LCP (Largest Contentful Paint) | < 2.5s | Critical |
| INP (Interaction to Next Paint) | < 200ms | Critical |
| CLS (Cumulative Layout Shift) | < 0.1 | Critical |
| TBT (Total Blocking Time) | < 200ms | High |
| FCP (First Contentful Paint) | < 1.8s | Medium |
| Speed Index | < 3.4s | Medium |
Step 2: Fix Core Web Vitals
LCP optimization (exact fixes)
<!-- 1. Preload LCP image -->
<link rel="preload" as="image" href="hero.webp" fetchpriority="high">
<!-- 2. LCP image: no lazy loading -->
<img src="hero.webp" width="1200" height="600" fetchpriority="high" alt="">
<!-- 3. Inline critical CSS in <head> -->
<style>
.hero { display: grid; min-height: 100dvh; }
.hero img { width: 100%; height: auto; aspect-ratio: 2/1; }
</style>
<!-- 4. Defer non-critical CSS -->
<link rel="preload" href="styles.css" as="style" onload="this.onload=null;this.rel='stylesheet'">
<!-- 5. Self-host fonts with font-display: swap -->
@font-face {
font-family: 'Geist';
src: url('/fonts/geist.woff2') format('woff2');
font-display: swap;
}
What ships with it
4 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 · 305 lines · 118 tokens per session scan A c2540d162410
performance-profiler is a skill published in the GitHub repository EliasOulkadi/shokunin (112 stars, last pushed 21d ago), licensed MIT. It adds 118 tokens to every session and 2,842 once invoked, about $0.0005 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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