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 tonyghiani/ai-essentials --skill a11y-auditgit clone --depth 1 https://github.com/tonyghiani/ai-essentialsWrote 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/tonyghiani/ai-essentials/a11y-audit)<a href="https://agentmods.dev/skills/tonyghiani/ai-essentials/a11y-audit"><img src="https://agentmods.dev/badge/skills/tonyghiani/ai-essentials/a11y-audit/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/tonyghiani/ai-essentials/a11y-audit"><img src="https://agentmods.dev/badge/skills/tonyghiani/ai-essentials/a11y-audit.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 | $0.00061 | $0.00891 |
| Opus 5.5 | $0.00024 | $0.00356 |
| Sonnet 5.5 | $0.00012 | $0.00178 |
| Haiku 4.5 | $0.00006 | $0.00089 |
Grade A, and why
a11y-audit 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 18d 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 — 69 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Accessibility audit
Order findings by who gets blocked. A keyboard trap stops work entirely; a missing aria-describedby is a degradation.
Blocking defects
Keyboard reachability. Every interactive element must be operable without a mouse.
onClickon adivorspanwith norole,tabIndex, and key handler. Use abutton.- Custom controls that don't handle
EnterandSpace, orEscapeto dismiss. tabIndexgreater than 0, which breaks document order.- Elements hidden from sighted users but still focusable, or the reverse.
Focus management. A modal, flyout, or dialog must move focus in, trap it while open, and return it to the trigger on close. Route changes must move focus to the new content, not leave it on a stale node. Never remove a focus outline without an equally visible replacement.
Accessible name. Every control needs one.
- Icon-only buttons with no
aria-label. - Inputs with no associated
label(a placeholder is not a label). - Links whose text is "here" or "read more" out of context.
- Images that convey meaning with no
alt; decorative images should havealt="".
Semantics. Prefer the native element over ARIA. A button beats role="button". Check heading order for skipped levels, list markup for lists, table markup for tabular data, fieldset/legend for radio and checkbox groups.
Important defects
State communicated visually only. Toggles need aria-pressed or aria-checked. Expandable sections need aria-expanded and aria-controls. Sort direction needs aria-sort. Selected tabs need aria-selected.
Errors and async updates. Form errors must be programmatically tied to the field (aria-describedby, aria-invalid), not just rendered red nearby. Content that appears after an action, a toast, a validation summary, a loaded result, needs a live region or focus move, or a screen-reader user never learns it happened.
Colour and contrast. Text below 4.5:1, or large text below 3:1. Meaning conveyed by colour alone with no icon, text, or pattern. Focus indicators below 3:1 against their background.
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.
- 18d ago Changed 0767337058c1
- 1mo ago First seen · 69 lines · 61 tokens per session scan A 84531129fce4
a11y-audit is a skill published in the GitHub repository tonyghiani/ai-essentials (7 stars, last pushed 19d ago), licensed MIT. It adds 61 tokens to every session and 891 once invoked, about $0.0002 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 2026-08-31.
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