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 agentmods add skills/kouroshez/coding-os/a11ynpx skills add kouroshez/coding-os --skill a11ygit clone --depth 1 https://github.com/kouroshez/coding-osWrote 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/kouroshez/coding-os/a11y)<a href="https://agentmods.dev/skills/kouroshez/coding-os/a11y"><img src="https://agentmods.dev/badge/skills/kouroshez/coding-os/a11y.svg" alt="Measured on agentmods" 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 | $0.00131 | $0.03538 |
| Opus 5 | $0.00066 | $0.01769 |
| Sonnet 5 | $0.00026 | $0.00708 |
| Haiku 4.5 | $0.00013 | $0.00354 |
Grade A, and why
a11y 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 4d 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 — 306 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Accessibility — WCAG 2.2 AA
A practical playbook for making UI usable by people with disabilities. WCAG 2.2 (October 2023, current standard) at AA level is the legal compliance bar in most jurisdictions and the right minimum for any app shipping in 2026.
When to Use This Skill
- Writing or reviewing any screen / component / form / modal.
- Adding interactive UI (buttons, menus, dropdowns, tabs).
- Setting up navigation (skip links, focus trap in modals).
- Choosing colors / typography for the design system.
- Auditing the app before launch.
- Responding to accessibility user feedback / lawsuit risk assessment.
For the cross-platform mobile concerns, see mobile-fundamentals. For component patterns, see react-native-patterns (RN) or frontend-fundamentals (web).
The Four POUR Principles (WCAG)
WCAG organizes everything around four principles. Memorize the acronym; it's the lens for every UI decision.
- Perceivable — Users must be able to perceive the content. Text alternatives for images, captions for video, sufficient color contrast, no info conveyed by color alone.
- Operable — Users must be able to operate the UI. Keyboard accessible, enough time, no seizure-inducing flashes, navigable.
- Understandable — Users must be able to understand the content + UI. Readable language, predictable behavior, helpful error messages.
- Robust — Content works with current AND future assistive tech. Semantic markup, valid code, ARIA used correctly.
Use Native Elements First
The most common a11y mistake: rebuilding a <button> as <div onClick>. The native element ships with:
- Keyboard accessibility (Enter/Space to activate).
- Focus indicator (browser default).
- Role announcement to screen readers ("button").
- Disabled state semantics.
- Form integration (submit, reset).
<!-- WRONG — div + onClick. Loses everything. -->
<div onClick={handleClick}>Save</div>
<!-- RIGHT -->
<button type="button" onClick={handleClick}>Save</button>
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.
- 4d ago First seen · 306 lines · 131 tokens per session scan A 19938fc8aecb
a11y is a skill published in the GitHub repository kouroshez/coding-os (6 stars, last pushed 4d ago), licensed Apache-2.0. It adds 131 tokens to every session and 3,538 once invoked, about $0.0007 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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