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 georgekhananaev/claude-skills-vault --skill web-qualitygit clone --depth 1 https://github.com/georgekhananaev/claude-skills-vaultWrote 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/georgekhananaev/claude-skills-vault/web-quality)<a href="https://agentmods.dev/skills/georgekhananaev/claude-skills-vault/web-quality"><img src="https://agentmods.dev/badge/skills/georgekhananaev/claude-skills-vault/web-quality/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/georgekhananaev/claude-skills-vault/web-quality"><img src="https://agentmods.dev/badge/skills/georgekhananaev/claude-skills-vault/web-quality.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 | $0.00054 | $0.00484 |
| Opus 5 | $0.00027 | $0.00242 |
| Sonnet 5 | $0.00011 | $0.00097 |
| Haiku 4.5 | $0.00005 | $0.00048 |
Grade A, and why
web-quality 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 9d 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
Web Quality Skills
Comprehensive web quality optimization based on Google Lighthouse guidelines and Core Web Vitals.
Available Sub-Skills
| Skill | File | Triggers |
|---|---|---|
| Web Quality Audit | web-quality-audit-SKILL.md | "audit", "quality review", "lighthouse" |
| Performance | performance-SKILL.md | "speed up", "optimize", "load time" |
| Core Web Vitals | core-web-vitals-SKILL.md | "LCP", "INP", "CLS", "Core Web Vitals" |
| Accessibility | accessibility-SKILL.md | "a11y", "WCAG", "accessible" |
| SEO | seo-SKILL.md | "SEO", "meta tags", "search" |
| Best Practices | best-practices-SKILL.md | "security", "best practices", "modern" |
Key Thresholds
Core Web Vitals (Good):
- LCP: 2.5s or less
- INP: 200ms or less
- CLS: 0.1 or less
Performance Budgets:
- Total page weight: < 1.5 MB
- JavaScript: < 300 KB
- CSS: < 100 KB
Lighthouse Targets:
- Performance: 90+
- Accessibility: 100
- Best Practices: 95+
- SEO: 95+
Source
What ships with it
6 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.
- 9d ago First seen · 47 lines · 54 tokens per session scan A 8c2a1e8848b0
web-quality is a skill published in the GitHub repository georgekhananaev/claude-skills-vault (28 stars, last pushed 1mo ago), licensed MIT. It adds 54 tokens to every session and 484 once invoked, about $0.0003 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 2026-09-03.
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