Tailwind CSS PostCSS + Standalone CLI Build

Two non-Vite ways to compile Tailwind : the PostCSS plugin (drops into any bundler that runs PostCSS) and the standalone CLI (a Node script or a single binary, used when there is no bundler at all).

This skill covers BOTH Tailwind v3 and v4 because the package names, config-file shapes, and CSS entry-point syntax all differ between versions. Pick the right combination or compilation silently produces empty CSS.

Companion skills :

• tailwind-impl-build-vite : the Vite plugin path (preferred for SPAs)
• tailwind-impl-config-v3 : the v3 JS-config surface
• tailwind-impl-config-v4 : the v4 CSS-first config surface
• tailwind-core-v3-vs-v4 : every breaking change across the API
• tailwind-errors-build : when builds fail or output is empty