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Accessibility audit against WCAG 2.1 AA. Checks semantic HTML, ARIA, keyboard navigation, color contrast, screen reader compatibility.
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Baseado na classificação ocupacional SOC
Use to evaluate the current state of a diamond. Checks theory gates, confidence levels, and recommends next action.
Use when building anything USER-FACING (or with persuasion/retention/cancellation/consent/pricing flows, or that touches vulnerable people) to surface design-level harm the security/privacy/compliance gates miss: dark/deceptive patterns and foreseeable misuse. Assumes the product works as designed and asks who it could harm and whether it is Happier-negative. NUDGE, not a block.
Lint canvas files for staleness, missing fields, inconsistent evidence types, and orphaned references. Run periodically or before major transitions.
Design the smallest viable test to validate or invalidate a critical assumption. Based on Torres's assumption testing framework, organized by Gilad's AFTER model (Assessment → Fact-Finding → Tests → Experiments → Release Results).
Use before any research activity or significant decision. Reviews cognitive biases relevant to the current stage.
Use to evaluate whether current work aligns with Better Value Sooner Safer Happier. Run at diamond completion and periodically.
| name | a11y-check |
| description | Accessibility audit against WCAG 2.1 AA. Checks semantic HTML, ARIA, keyboard navigation, color contrast, screen reader compatibility. |
| metadata | {"instruction_budget":"26","framework_dependency":"mycelium","framework_dependency_note":"This skill is designed to run within the Mycelium framework (https://github.com/haabe/mycelium). Standalone use will skip the canvas state, theory gates, and harness behavior the skill assumes. Install: /plugin install mycelium@haabe-mycelium."} |
Evaluate user-facing work against WCAG 2.1 AA. Accessibility is a design constraint, not a polish step (Downe Principle 11).
| Stack | Tool | Command |
|---|---|---|
| React/Web | axe-core | npx axe <url> or axe-core in tests |
| Any web | Lighthouse | npx lighthouse <url> --only-categories=accessibility |
| Any web | pa11y | npx pa11y <url> |
| CI/CD | axe-linter | Add to CI pipeline |
| Violation | Fix |
|---|---|
| Missing alt text | Add descriptive alt or alt="" for decorative |
| Low color contrast | Increase contrast ratio to 4.5:1 minimum |
| Missing form labels | Add <label for="id"> or aria-label |
| No focus indicator | Add :focus-visible styles, never outline: none |
| Non-semantic buttons | Use <button> not <div onclick> |
| Missing heading hierarchy | Use h1-h6 in order, don't skip levels |
| Auto-playing media | Add pause/stop controls, respect prefers-reduced-motion |
For products handling sensitive user contexts (health, finance, domestic violence, government services), also review trauma-informed design principles in ${CLAUDE_PLUGIN_ROOT}/domains/quality/CLAUDE.md. Source: Hussain (Chayn), built on SAMHSA's 6 Principles (2014).
For information-dense or learning-oriented products, supplement WCAG with the Neurodiversity Design System (neurodiversity.design, Soward). Its 8 principle categories with neurotype-to-UI-element matrix address cognitive accessibility needs that WCAG does not fully cover (e.g., font shapes for dyslexia, number formatting for dyscalculia, animation controls for ADHD).
