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 klovaaxel/web-a11y-agent-skills --skill web-a11y-web-componentsgit clone --depth 1 https://github.com/klovaaxel/web-a11y-agent-skillsWrote 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/klovaaxel/web-a11y-agent-skills/web-a11y-web-components)<a href="https://agentmods.dev/skills/klovaaxel/web-a11y-agent-skills/web-a11y-web-components"><img src="https://agentmods.dev/badge/skills/klovaaxel/web-a11y-agent-skills/web-a11y-web-components/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/klovaaxel/web-a11y-agent-skills/web-a11y-web-components"><img src="https://agentmods.dev/badge/skills/klovaaxel/web-a11y-agent-skills/web-a11y-web-components.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 | $0.00051 | $0.00239 |
| Opus 5 | $0.00026 | $0.00120 |
| Sonnet 5 | $0.00010 | $0.00048 |
| Haiku 4.5 | $0.00005 | $0.00024 |
Grade A, and why
web-a11y-web-components 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 11d 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 A11y Web Components
Rules
- Make accessible usage the easiest component API.
- Prefer progressive enhancement and useful light DOM fallback.
- Keep semantic reading order correct with slots and DOM order.
- Avoid brittle cross-root ARIA assumptions.
- Validate required labels, titles, and relationships at runtime where useful.
- Test manually because scanners vary in Shadow DOM coverage.
Checklist
Web component checklist
- [ ] Component has usable fallback or failure mode
- [ ] Slot order supports semantic reading order
- [ ] Required accessibility inputs are documented and enforced
- [ ] Focus delegation behavior is intentional
- [ ] ARIA relationships do not depend on unsupported cross-root references
- [ ] Automation is paired with keyboard and screen reader smoke checks
Output
Document component contract, Shadow DOM constraints, focus behavior, and manual verification notes.
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.
- 11d ago First seen · 33 lines · 51 tokens per session scan A 2217094f2afc
web-a11y-web-components is a skill published in the GitHub repository klovaaxel/web-a11y-agent-skills (5 stars, last pushed 4mo ago), licensed MIT. It adds 51 tokens to every session and 239 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 2026-08-31.
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