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penpot-audit-accessibility

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Atualizado9 de julho de 2026 às 08:24

Audit a Penpot design against WCAG 2.1/2.2 AA (optionally AAA) and produce a structured severity report: color contrast, touch/target sizes, text alternatives, heading hierarchy, and keyboard/focus order. Proposes fixes — does not auto-apply. Also serves as the Evaluator in the brief-to-screen loop. Triggers: 'check accessibility', 'accessibility audit', 'WCAG check', 'contrast audit', 'a11y review', 'check color contrast', 'is this accessible'.

Instalação

Instalar com Codex ou Claude Copie este prompt, cole no Codex, Claude ou outro assistente e deixe que ele revise a página da skill e instale para você.

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penpot

penpot/penpot-ai-kit

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Ocupações relacionadasSOC

Baseado na classificação ocupacional SOC

Designers de interfaces web e digitaisInformática e Matemática·SOC 15-1255

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9 arquivos

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name	penpot-audit-accessibility
description	Audit a Penpot design against WCAG 2.1/2.2 AA (optionally AAA) and produce a structured severity report: color contrast, touch/target sizes, text alternatives, heading hierarchy, and keyboard/focus order. Proposes fixes — does not auto-apply. Also serves as the Evaluator in the brief-to-screen loop. Triggers: 'check accessibility', 'accessibility audit', 'WCAG check', 'contrast audit', 'a11y review', 'check color contrast', 'is this accessible'.
disable-model-invocation	false
version	0.2.0
audiences	["design-system","product-designer","design-engineer","migration"]
mode-default	suggest
requires	["shared/penpot-mcp-tool-reference.md","shared/plugin-api-gotchas.md","shared/naming-conventions.md","shared/modes-and-policies.md"]

penpot-audit-accessibility — WCAG AA auditor

1. Title + How it works

penpot-audit-accessibility inspects a design and reports accessibility issues. Every mutation goes through execute_code (this skill only reads); validate visually with export_shape; read structure with penpotUtils.shapeStructure (full tool surface: shared/penpot-mcp-tool-reference.md). It reads the object tree (penpotUtils.shapeStructure/analyzeDescendants), computes WCAG contrast from resolved fills, checks sizes and semantic naming, and emits a severity-ranked report. It proposes; it does not auto-fix.

2. The One Rule That Matters Most

Report, don't silently fix. Every issue gets severity + impact + a concrete fix + confidence. Acceptance criteria (AA contrast, target size) are gates — a screen isn't "done" until they pass.

3. Penpot MCP Tool Reference

Full surface: shared/penpot-mcp-tool-reference.md. Key calls: execute_code with penpotUtils.analyzeDescendants (collect text/colors/sizes), penpot.shapesColors(shapes) if needed; export_shape to capture evidence for the report.

4. Plugin API Essentials

Gotcha numbers refer to shared/plugin-api-gotchas.md:

#1 — read resolved colors from shape.fills/shape.strokes (arrays; items immutable). Text color is the Text shape's fill.
#5 — get dimensions from shape.width/shape.height/shape.bounds (read-only; this skill never resizes).
Heading hierarchy depends on semantic layer names (h1…h6) — if layers are unnamed, recommend penpot-rename-layers first.
Focus/keyboard order is inferred from layout order + interactions; this is heuristic, flag as such.
Verify unfamiliar signatures with penpot_api_info before relying on them.

5. Token-Aware Brief Contract

Context — what's being audited (page/selection/component); product surface.
Objective — single: "audit X against WCAG 2.1 AA" (state AAA if requested).
Inputs — target shapes, conformance level, any known exceptions.
Constraints — read-only; no canvas mutation.
Acceptance Criteria — every interactive element checked; contrast 4.5:1 (normal) / 3:1 (large & UI); targets ≥24×24 (WCAG 2.2; note 44×44 for primary); headings ordered; report complete.

Act as an accessibility specialist.

6. Mandatory Workflow

Phase 0 — Inspection. high_level_overview; collect data with scripts/collectAccessibilityData.js (references/01-inspection.md).

Phase 1 — Contrast. scripts/checkColorContrast.js (references/02-contrast-checks.md) — text vs background, UI component contrast.

Phase 2 — Sizing. scripts/checkTouchTargets.js (references/03-sizing-checks.md) — interactive target sizes.

Phase 3 — Semantics. Heading hierarchy, labels/alt (from semantic names), keyboard/focus order heuristics.

Phase 4 — Report. scripts/generateReport.js (references/04-report-generation.md) — severity-ranked, handoff-ready. ✋ Checkpoint: present findings; if asked to fix, route safe fixes to the owning skill (e.g. penpot-foundations for token swaps) with review.

7. Critical Rules

Read-only; never mutate the canvas in this skill.
Every issue: Severity (High/Med/Low) + Issue + Impact + Fix + Confidence.
Use exact thresholds: 4.5:1 / 3:1; targets ≥24×24 (AA 2.2).
If naming is missing, flag heading-hierarchy checks as unreliable and recommend renaming first.
Mark heuristic checks (keyboard order) as such; don't overstate confidence.
No silent scope cuts — if you sampled, say so.

8. Domain Architecture

Report schema per issue:

{ severity, criterion (e.g. "1.4.3 Contrast"), element, current, required, fix, confidence }

Plus a summary: counts by severity, pass/fail per criterion, and a handoff checklist.

The final report must ALSO be emitted as a JSON object per shared/report-schemas/accessibility-report.schema.json — including the derived highOrMedium count (findings with severity High or Medium; what the brief-to-screen workflow branches on) — and mirrored to the run ledger.

9. Modes & Policies

Default suggest (read-only). Any fix is delegated to the owning skill under Apply-with-review.

10. State Management

Ledger under RUN_ID: phase, issues:[...], sampled. Lightweight; this skill is mostly read.

11. User Checkpoints

After phase	Artifacts	Ask
4 Report	severity report + `export_shape` evidence	Fix now (route to owning skill) or hand off?

12. Naming Conventions

shared/naming-conventions.md — semantic HTML names enable heading-hierarchy and label checks.

13. Anti-Rationalization Table

Excuse	Why it's wrong	Countermeasure (halt)
"Contrast looks fine to me."	Eyeballing isn't WCAG.	Compute the ratio; compare to 4.5:1 / 3:1.
"I'll just fix it myself quietly."	This skill is read-only/advisory.	Report with severity; route fixes to the owning skill with review.
"Targets are probably big enough."	Guessing fails AA 2.2.	Measure width/height; compare to ≥24×24.
"Headings are obvious from size."	Visual size ≠ semantic order.	Check semantic names; if missing, recommend `penpot-rename-layers`.
"Skip keyboard order, hard to tell."	Silent gaps mislead.	Provide a heuristic order and flag confidence explicitly.

14. Helper Code Snippets

// WCAG relative luminance + contrast ratio
function lum(hex){const c=hex.replace('#','');const v=[0,2,4].map(i=>parseInt(c.substr(i,2),16)/255)
  .map(u=>u<=0.03928?u/12.92:Math.pow((u+0.055)/1.055,2.4));return 0.2126*v[0]+0.7152*v[1]+0.0722*v[2];}
function ratio(a,b){const L1=lum(a),L2=lum(b);const hi=Math.max(L1,L2),lo=Math.min(L1,L2);return (hi+0.05)/(lo+0.05);}
return { example: Number(ratio('#101114','#F7F8FA').toFixed(2)) }; // ~ AA pass

15. Reference Resources

WCAG 2.1/2.2 SC 1.4.3 (contrast), 2.5.8 (target size), 1.3.1 (info & relationships), 2.4.3 (focus order).
penpot_api_info('Text'), penpot_api_info('Shape','fills').

16. Supporting Files

references/: 01-inspection.md, 02-contrast-checks.md, 03-sizing-checks.md, 04-report-generation.md. scripts/: collectAccessibilityData.js, checkColorContrast.js, checkTouchTargets.js, generateReport.js.