figma-lint-design

figma-lint-design — WCAG 2.2 + design-system lint over a node tree

Walk a Figma node (or the whole current page) and report accessibility and design-quality problems in one pass. Runs entirely through use_figma, so it works on any Figma plan and inspects the real design (true colors, real auto-layout, actual variant names) rather than generated code.

Why this is unique: the native Figma MCP (get_design_context, get_metadata, etc.) reads designs for code generation but does not lint them. There is no built-in "is this accessible / token-clean?" check on the design side. This skill fills that gap with a faithful port of 14 WCAG 2.2 rules plus 6 design-system/layout rules.

Skill boundaries

• use_figma rules — load the official figma-use skill first; it is the full Figma Plugin API reference. Essentials these scripts rely on: plain JS with top-level await + return (no IIFE, no figma.closePlugin(); console.log is not returned), inputs inlined as const at the top of each script, colors in 0–1 range, load fonts before any text op, await figma.getNodeByIdAsync(...), and atomic errors (a failed script applies nothing — read the error, fix, retry).
• Per-component deep scorecard (state coverage, color-blind sim, 0–100 scores) → use figma-audit-accessibility.
• CODE-side a11y (axe-core over generated HTML) → use figma-scan-code-accessibility.
• Design-vs-code drift → use figma-check-design-parity.

Workflow

1. Pick the scope. Get the target NODE_ID (a frame, component set, or screen) from the user's selection or a URL. Leave it null to lint the entire current page.
2. Pick the rules. RULES defaults to ['all']. Narrow it to a group ('wcag', 'design-system', 'layout') or a specific rule id (e.g. 'wcag-contrast') to cut noise. The full catalog is in references/lint-rules.md.
3. Run scripts/lint-design.js via use_figma (skillNames: "figma-lint-design"). Edit the const inputs at the top first.
4. Triage by severity. The result groups findings by rule, each carrying severity (critical/warning/info) and wcagLevel (a/aa/aaa/best-practice/design-system). Lead with critical (contrast, target size, focus, color-only).
5. Fix + re-lint. Apply fixes (via figma-manage-variables, figma-use, etc.) and re-run the same scope to confirm summary.total dropped. Each finding includes the offending node.id so you can jump straight to it.

Key rules

• Colors are 0–1 floats. Contrast math uses sRGB linearization + relative luminance; the script ships its own helpers (no hex needed for input).
• Background is inferred by walking ancestors for the nearest solid fill (defaults to white). Contrast on semi-transparent fills is flagged approximate: true.
• MAX_DEPTH (default 10) and MAX_FINDINGS (default 100) bound the walk. If truncated is set, narrow the scope or raise the cap.
• WCAG-honest severity: some rules (text size, line height, letter/paragraph spacing) are labelled best-practice, not a hard WCAG failure — see lint-rules.md for the exact reasoning per rule.
• Findings are descriptive, not auto-fixed. Confirm intent before bulk-editing a design.