xo is a zero-configuration linting tool for JavaScript and TypeScript. It functions as a wrapper for the ESLint engine, providing a set of strict default rules and static analysis to enforce professional coding standards without requiring manual configuration files.
The tool distinguishes itself by providing a zero-config runtime that automatically determines parser settings and linting rules at execution time. It includes a code style formatter to standardize indentation and syntax across all project files.
The project covers automated error correction and source code formatting to eliminate manual cleanup. It provides capabilities for TypeScript static analysis, framework file validation, and the ability to suppress legacy violations to focus enforcement on new code.
Integration features include the ability to generate compatible configurations for editor extensions and support for incorporating linting checks into continuous integration pipelines.