Tailwind CSS Animated is an npm library that extends Tailwind CSS with a comprehensive set of animation utilities and 19 predefined keyframe animations. It provides utility classes for animation duration, delay, direction, iteration count, timing function, fill mode, play state, and composition, plus ready-to-use animations such as wiggle, shake, fade, flip, jump, and rotate. The package is dual-version: it ships a CSS-first implementation using Tailwind v4's @utility and @theme directives (src/utilities/*.css, src/index.css), alongside a legacy JavaScript plugin (src/compat/*.js, src/index.js) that works with Tailwind v3's plugin API. The architecture cleanly separates the v4 CSS utilities from the v3 compatibility layer, sharing a single theme definition in src/compat/theme.js.