scan-code-accessibility-figma

scan-code-accessibility-figma — axe-core + JSDOM scan of HTML

Run axe-core (Deque's accessibility engine) against an HTML string using JSDOM. This is the code side of the accessibility story: it checks the markup your Figma-to-code workflow produced. It pairs with lint-design-figma (design side) to cover both ends.

Not a use_figma skill. This runs in plain Node — no Figma file, no Plugin API. axe-core owns the rule database; this skill never invents rules.

Skill boundaries

• Design-side visual a11y (contrast, focus rings, target size, color-only) → use lint-design-figma. Those rules are intentionally disabled here.
• Per-component design scorecard → use audit-accessibility-figma.
• Design-vs-code parity → use check-design-parity-figma (feed it the codeSpec.accessibility this scan can emit).
• This skill does not use use_figma, so the figma-use conventions do not apply.

Why visual rules are disabled

JSDOM provides a DOM but no layout engine and no computed visual styles — there is nothing to measure pixels or rendered colors against. So axe's visual rules would always be "incomplete" or wrong. The scan disables them explicitly:

• color-contrast and color-contrast-enhanced — need rendered colors.
• link-in-text-block — needs surrounding text layout.
• target-size — needs rendered box dimensions.

Everything structural/semantic (ARIA, roles, names, labels, alt, headings, landmarks, lang, dup IDs, tabindex, ~50 rules total) runs normally. For the visual half, run lint-design-figma on the design.

Usage

1. Install deps once (in this skill's scripts/ dir):

   cd scripts && npm install
   

   Installs axe-core and jsdom.
2. Run the scan against an HTML file or an inline string:

   node scan.mjs path/to/component.html
   node scan.mjs --html '<button>Save</button>'
   

   Optional flags:
   • --tags wcag22aa — filter to a WCAG tag set (wcag2a, wcag2aa, wcag21aa, wcag22aa, best-practice). Repeatable / comma-separated.
   • --context '#my-component' — scope the scan to a CSS selector.
   • --include-passing — include counts of passing / incomplete / inapplicable rules.
   • --map-to-codespec — also emit a codeSpecAccessibility object (semantic element, role, aria-label, focusVisible, keyboard interactions, disabled/error support) ready to drop into check-design-parity-figma's codeSpec.accessibility.
3. Read the JSON on stdout: violations grouped by rule with severity (critical/warning/info from axe impact), wcagTags, helpUrl, and up to 10 offending nodes each, plus a summary.

A bare HTML fragment is auto-wrapped in <!DOCTYPE html><html lang="en">…<body>… before scanning.

Output shape

{
  "engine": "axe-core", "version": "4.x", "mode": "jsdom-structural",
  "note": "JSDOM mode: structural/semantic checks only. Visual rules disabled — use lint-design-figma.",
  "categories": [ { "rule": "button-name", "severity": "critical", "count": 1, "description": "...", "wcagTags": ["wcag2a","wcag412"], "helpUrl": "...", "nodes": [ { "html": "...", "target": ["button"], "failureSummary": "..." } ] } ],
  "summary": { "critical": 1, "warning": 0, "info": 0, "total": 1 }
}

Severity mapping: axe critical/serious → critical, moderate → warning, minor → info.