<objective Make an application usable by people who rely on keyboards and assistive technology, and prove it with tests that run in CI. A button that passes can still be unreachable by keyboard; a page with zero axe violations can still be impossible to operate with a screen reader. Automated tools catch 30-40% of accessibility issues — this skill covers the automated scan plus the keyboard, screen reader, and ARIA-state testing that catch the other 60-70%. </objective Discovery Questions Check first — if it exists, use it as the foundation and skip anything already answered. Requirements and…