This is the IBM Carbon Design System monorepo, a comprehensive UI component library and design token system. It provides production-ready React components (via `@carbon/react`) and Lit-based Web Components (via `@carbon/web-components`), along with SCSS styles, icons, pictograms, themes, typography, layout, and motion design tokens. The repository also includes a CLI tool for scaffolding and bundling (`@carbon/cli`), an upgrade utility with jscodeshift codemods for automated version migrations (`@carbon/upgrade`), and a set of shared configurations (ESLint, stylelint, prettier, Jest). The architecture is a multi-package monorepo managed with Yarn workspaces and Lerna, with dedicated build pipelines for icons (via `@carbon/icon-build-helpers`) and design tokens (via Style Dictionary). The system is heavily tested with Jest, Playwright for accessibility and end-to-end tests, and includes Figma code-connect files for design-to-code integration.