chore: release v4.0.0 - sync 550+ skills and restructure docs

skills/wcag-audit-patterns/SKILL.md

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+---
+name: wcag-audit-patterns
+description: Conduct WCAG 2.2 accessibility audits with automated testing, manual verification, and remediation guidance. Use when auditing websites for accessibility, fixing WCAG violations, or implementing accessible design patterns.
+---
+
+# WCAG Audit Patterns
+
+Comprehensive guide to auditing web content against WCAG 2.2 guidelines with actionable remediation strategies.
+
+## Use this skill when
+
+- Conducting accessibility audits
+- Fixing WCAG violations
+- Implementing accessible components
+- Preparing for accessibility lawsuits
+- Meeting ADA/Section 508 requirements
+- Achieving VPAT compliance
+
+## Do not use this skill when
+
+- You need legal advice or formal certification
+- You only want a quick automated scan without manual verification
+- You cannot access the UI or source for remediation work
+
+## Instructions
+
+1. Run automated scans (axe, Lighthouse, WAVE) to collect initial findings.
+2. Perform manual checks (keyboard navigation, focus order, screen reader flows).
+3. Map each issue to a WCAG criterion, severity, and remediation guidance.
+4. Re-test after fixes and document residual risk and compliance status.
+
+Refer to `resources/implementation-playbook.md` for detailed patterns, checklists, and templates.
+
+## Safety
+
+- Avoid claiming legal compliance without expert review.
+- Keep evidence of test steps and results for audit trails.
+
+## Resources
+
+- `resources/implementation-playbook.md` for detailed patterns, checklists, and templates.