checkstyle-formatter

checkstyle-formatter is a simple Node.js library for formatting lint results into Checkstyle XML (version 4.3). The current stable version is 1.1.0, with a low release cadence (minor updates as needed). It takes an array of file/message objects and outputs an XML string. Unlike full-featured reporters (e.g., eslint formatters), it leaves reporting details to the user and has zero dependencies. Supports optional 'source' information since v1.1.0. MIT licensed.