ESLint Plugin Utils

eslint-plugin-utils is a utility library for building ESLint plugins and custom rules, developed as part of the un-ts monorepo. The current stable version is 0.4.1, released in December 2024, with a focus on compatibility with ESLint flat config and TypeScript. It provides helpers for rule creation, schema validation, and AST traversal, reducing boilerplate for ESLint plugin authors. Key differentiators include first-class TypeScript support with bundled types, dependency on @typescript-eslint/utils for type-safe rule creation, and support for both legacy and flat ESLint configurations. The package follows semver and is updated as part of a monorepo with several related plugins (text, markup, htm).