WCAG Audit Patterns

What Is This

The WCAG Audit Patterns skill is a specialized toolset for auditing web content against the Web Content Accessibility Guidelines (WCAG) 2.2. It provides a structured approach to identifying, categorizing, and remediating accessibility issues. This skill leverages both automated testing and manual verification techniques, ensuring comprehensive coverage of accessibility criteria. It is designed for developers, accessibility specialists, and organizations who need to comply with accessibility standards such as ADA, Section 508, or seek to deliver universally accessible digital experiences.

With this skill, users gain actionable guidance on identifying common accessibility violations, understanding the impact of each issue, and implementing best-practice remediation strategies. The skill also helps teams prepare for legal compliance reviews, internal audits, or voluntary accessibility certifications like VPAT.

Why Use It

Accessibility is a legal, ethical, and usability imperative. Most countries now require digital content to be accessible to all users, including those with disabilities. Failing to meet WCAG 2.2 standards can result in legal action, loss of contracts, or exclusion of users. The WCAG Audit Patterns skill is tailored to help teams:

• Proactively discover and resolve accessibility issues before they escalate
• Ensure ongoing compliance with evolving accessibility regulations
• Improve usability for all users, not just those with disabilities
• Streamline the workflow for remediation with concrete code examples and patterns
• Reduce risk of lawsuits and improve compatibility with assistive technology

By using this skill, organizations can achieve higher levels of accessibility maturity, reduce technical debt, and enhance user trust.

How to Use It

The WCAG Audit Patterns skill follows a structured methodology, combining automated tools with manual inspection and remediation. Here is a typical workflow:

1. Automated Accessibility

Testing

Use automated tools (such as axe-core, Lighthouse, or Pa11y) to scan your website for common WCAG violations. These tools can detect a wide range of issues, including missing alt attributes, insufficient color contrast, and improper heading structures.

Example (Node.js with axe-core):

const { AxePuppeteer } = require('axe-puppeteer');
const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://example.com');
  const results = await new AxePuppeteer(page).analyze();
  console.log(results.violations);
  await browser.close();
})();

2. Manual

Verification

Not all accessibility issues can be caught by automated tests. Manual verification is essential for:

• Keyboard navigability
• Logical reading order
• Proper use of ARIA attributes
• Testing with screen readers (e.g., NVDA, JAWS)

Example Checklist:

• Can all interactive elements be reached and operated via keyboard?
• Are form controls properly labeled?
• Are headings structured hierarchically (h1, h2, h3, etc.)?

3. Pattern-Based

Remediation

After identifying issues, apply the recommended remediation patterns provided by the skill. Each pattern offers examples and code snippets for common problems.

Example: Fixing Missing Alt Text

<!-- BAD: -->
<img src="submit.png">

<!-- GOOD: -->
<img src="submit.png" alt="Submit form">

Example: Adding Keyboard Access to Custom Elements

element.addEventListener('keydown', function(e) {
  if(e.key === 'Enter' || e.key === ' ') {
    // Trigger action
  }
});

4. Documentation and

Reporting

Document all issues found, their severity, and remediation steps. Use structured reports to communicate progress and compliance status.

Example Report Table:

When to Use It

The WCAG Audit Patterns skill is essential in the following scenarios:

• Conducting accessibility audits during development sprints or code reviews
• Fixing WCAG violations reported by automated scans or user feedback
• Implementing accessible design patterns in new components or features
• Preparing for legal reviews, contract requirements, or voluntary accessibility certifications (e.g., VPAT)
• Achieving and maintaining compliance with ADA, Section 508, or other regulations

Important Notes

• Automated tools only detect 30-40% of accessibility issues. Manual review is critical.
• Always test with real assistive technologies and diverse user scenarios.
• Remediation should follow the POUR principles (Perceivable, Operable, Understandable, Robust).
• Prioritize issues based on impact: critical blockers (e.g., missing alt text, no keyboard access) should be addressed first.
• Maintain accessibility as part of your ongoing development workflow, not as a one-time task.
• Regularly update knowledge as WCAG guidelines evolve and new patterns emerge.
• Comprehensive documentation and reporting are vital for audit trails and process improvement.

The WCAG Audit Patterns skill empowers teams to deliver accessible, compliant, and high-quality digital products by providing a clear path from issue identification to remediation, with practical code examples and expert guidance. For more information, refer to the source repository.