Base UI component migration

Both starter kits now use Base UI as the accessible primitive layer beneath shadcn/ui. The migration covers the shared UI library and the product surfaces that compose it, including authentication, organization management, administration, billing, dialogs, menus, selects, tooltips and responsive navigation.

What changed

• Replaced Radix UI primitive packages with @base-ui/react.
• Updated component composition from Radix-specific asChild behavior to Base UI's render API where required.
• Migrated dialogs, sheets, drawers, menus, popovers, form controls, tabs, tooltips and related interaction state to Base UI contracts.
• Set the shadcn configuration to the Base UI base-nova style so newly added components remain compatible with the shipped component system.
• Preserved Achromatic's existing visual language and direct ownership of the source in components/ui/.

Verification

The release adds focused component coverage and expands Playwright coverage for desktop and mobile navigation, dialogs, menus, selects, checkboxes, radio groups, calendar popovers, CSV export controls and focus restoration. The full Prisma and Drizzle applications were type-checked, built and tested against their production server before release.

Existing projects

New downloads include the migration. Existing projects should treat this as a component-system upgrade rather than replacing individual dependency versions: copy the updated components/ui/ implementations together with their affected call sites, update components.json and remove the old Radix packages only after the application compiles. Review locally customized components before merging because composition props and open-state callbacks changed.

See the theming and component guidance for Pro Prisma or Pro Drizzle.