backstage/.changeset/eslint-plugin-deprecated-bui-tokens-rule.md

@backstage/eslint-plugin

@backstage/eslint-plugin
patch

Adds a new @backstage/no-deprecated-bui-tokens lint rule that warns when a deprecated @backstage/ui CSS token is referenced in a JavaScript or TypeScript file (including CSS-in-JS patterns and template literals). The rule is included in the recommended config, so plugin authors using plugin:@backstage/recommended will receive warnings automatically when using tokens that have been superseded by the new semantic color families. Note that plain CSS and CSS module files are outside ESLint's scope and are not covered by this rule.