csstree

Parse, validate, extract from, and transform CSS through the css-tree AST in Node scripts. Use when extracting CSS custom properties / design tokens from a stylesheet, validating CSS against W3C specs, walking or linting a stylesheet, renaming selectors, diffing tokens between two files, or doing source-to-source CSS transforms — anything that needs a real CSS parser instead of regex. Triggers: "parse CSS", "extract design tokens / custom properties from CSS", "validate CSS", "css-tree", "CSS AST", "transform a stylesheet".