eslint-plugin

Create custom ESLint plugins and rules using test-driven development. Supports the flat config (ESLint 9+) and legacy config formats. Uses @typescript-eslint/rule-tester for testing. Covers problem, suggestion, and layout rule types, including auto-fixers and type-aware rules that use TypeScript type information. Use this when creating or modifying ESLint rules, plugins, custom linting logic, or authoring auto-fixers.