Commitments

All interactive components are operable via keyboard alone.
All form controls expose aria-invalid and aria-describedby when errored.
All overlays manage focus: trap on open, restore on close.
All animations respect prefers-reduced-motion.
Automated axe scans run against every component in CI; violations fail the build.

Keyboard support

Component	Keys
`Dialog`	`Esc` closes, `Tab` cycles within the dialog
`Tabs`	`←`/`→` or `↑`/`↓` moves focus, `Home`/`End` jumps
`RadioGroup`	Arrow keys move focus + selection; only one tab stop per group
`DropdownMenu`	Arrow keys navigate items, type-ahead, `Enter` activates, `Esc` closes
`Select`	Arrow keys + type-ahead; `Enter` commits, `Esc` cancels
`Slider`	`←`/`→` steps, `Shift`+arrow jumps, `Home`/`End` bounds

Focus management

Dialog traps focus within the modal, locks body scroll, and restores focus to the trigger on close.
Popover and DropdownMenu return focus to the trigger when dismissed.
Tooltip is not focusable — it uses aria-describedby so screen readers announce it without breaking tab order.

Screen readers

Toast differentiates role="alert" (errors) from role="status" (everything else) and sets aria-live politeness levels appropriately.
Alert announces as a region with a semantic title.
FormControl wires id/htmlFor and exposes aria-invalid/aria-describedby for error and helper text.
Icons inside buttons are hidden from screen readers (aria-hidden); the button label is what gets announced.

Reduced motion

Every animation honors prefers-reduced-motion. Spinners, skeletons, carousels, and dialog transitions drop to no-op or instant states when the user opts out.

Testing

Sisyphos UI runs an a11y test on every component via Vitest + @testing-library/react + jest-axe. Contributions that introduce accessibility regressions are blocked by CI.