> ## Documentation Index
> Fetch the complete documentation index at: https://docs.b3os.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Enhanced Design System and Billing API

Improved design system tooling with visual testing and added billing invoice functionality to the API.

_April 19, 2026 · Feature_

This release brings improvements to both the design system and billing capabilities.

## Design System Enhancements

- Added visual regression testing to catch UI changes automatically
- Improved design-to-code workflow with better tooling integration
- Enhanced button component with comprehensive testing coverage
- Added linting rules to maintain consistent styling patterns

## Billing API Updates

- New invoice endpoints for retrieving billing information
- Support for invoice amounts, payment status, and due dates
- Enhanced currency and payment tracking capabilities

Back to [Changelog](/changelog).