A11yKit: End-to-End Type Safety Meets Web Accessibility (WCAG 2.2) Auditing for Full-Stack tRPC Apps

[gstar-byte]

Hi tRPC community!

tRPC delivers unbeatable developer velocity and confidence through end-to-end type safety across client and server boundaries. While tRPC ensures runtime data schemas and RPC procedures never fall out of sync, delivering full-stack quality also means ensuring that the resulting frontend interfaces meet digital accessibility standards (such as WCAG 2.2 AA/AAA, the European Accessibility Act, and ADA requirements).

To make visual and structural accessibility testing just as frictionless and lightweight as type-checking, we built A11yKit — a suite of 15+ browser-based, client-side accessibility utilities.

How A11yKit Helps Full-Stack tRPC Developers:

• 🎨 WCAG 2.2 & APCA Color Contrast Calculators: Test dynamic mutation states, loading skeletons, query error banners, and theme tokens against rigorous readability standards.
• 👁️ Color Vision Deficiency Simulator: Preview your UI under 8 visual impairment models to ensure status badges and data metrics are distinguishable without relying solely on color.
• ⌨️ Keyboard Navigation & Modal Focus Trap Tester: Ensure interactive dialogs, drawer panels, and dropdowns driven by tRPC queries maintain compliant focus order.
• 📱 Touch Target Size Inspector: Verify buttons and action triggers satisfy WCAG 2.2 Criterion 2.5.8 (Target Size minimum 24×24px / 44×44px).
• 🔒 100% Client-Side Privacy / Zero Telemetry: Operates entirely within your local browser using Web Workers. Internal schemas, client state, and proprietary UI copy never leave your machine.

Integration into CI Pipelines:

# Audit build outputs via npx
npx a11ykit-cli audit ./dist

# Or install via Homebrew
brew install gstar-byte/tap/a11ykit

• 🌐 Live Web Toolbox: https://a11ykit.site
• 🤖 GitHub Action: gstar-byte/a11ykit-action

We would love to hear feedback from fellow tRPC developers on what accessibility workflows you find most valuable in production apps!