This is an ESLint plugin and configuration package developed by Joyent to enforce JavaScript coding standards similar to those used with `jsstyle` and JavaScript Lint in their Manta and Triton projects. It's designed for developers working on Joyent repositories who want to maintain consistent code style and catch potential issues through ESLint's configurable linting rules. The plugin provides pre-configured style and lint rules that can be easily integrated into projects via package.json and Makefile configurations.