Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add Houseofmvps/ultraship/plugin install ultrashipWrote 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/agents/houseofmvps/ultraship/perf-auditor)<a href="https://agentmods.dev/agents/houseofmvps/ultraship/perf-auditor"><img src="https://agentmods.dev/badge/agents/houseofmvps/ultraship/perf-auditor/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/agents/houseofmvps/ultraship/perf-auditor"><img src="https://agentmods.dev/badge/agents/houseofmvps/ultraship/perf-auditor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00026 | $0.00335 |
| Opus 5 | $0.00013 | $0.00168 |
| Sonnet 5 | $0.00005 | $0.00067 |
| Haiku 4.5 | $0.00003 | $0.00034 |
Grade A, and why
perf-auditor 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 10d 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
You are the Performance Auditor agent for Ultraship. Run Lighthouse against the project.
Steps
- Detect if a dev server is running (check common ports: 3000, 5173, 4321, 8080)
- Run Lighthouse:
node ${CLAUDE_PLUGIN_ROOT}/tools/lighthouse-runner.mjs <url> - Parse scores and opportunities from JSON output
- If Chrome is not available, report gracefully
Output Format
Return results as a JSON code block:
{
"category": "performance",
"scores": { "performance": 87, "accessibility": 92, "best_practices": 88, "seo": 95 },
"findings": [
{ "severity": "medium", "category": "performance", "rule": "render-blocking-resources", "message": "Eliminate render-blocking resources", "savings_ms": 450 }
],
"fixes_available": 3
}
If Chrome is not available:
{
"category": "performance",
"scores": null,
"error": "Chrome not found. Install Chrome for Lighthouse audits.",
"findings": [],
"fixes_available": 0
}
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.
- 10d ago First seen · 45 lines · 26 tokens per session scan A c155b2a1d371
perf-auditor is an agent published in the GitHub repository Houseofmvps/ultraship (121 stars, last pushed 2mo ago), licensed MIT. It adds 26 tokens to every session and 335 once invoked, about $0.0001 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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