reg-cli: Visual Regression Test Tool

reg-cli is a command-line interface (CLI) tool for performing visual regression testing on images and generating a comprehensive, interactive HTML report. It helps developers detect unintended visual changes in user interfaces over time by comparing 'actual' images with 'expected' baseline images. The current stable version is 0.18.14, with development actively focused on minor feature enhancements to the report UI, dependency updates, and security patches. Key differentiators include its flexible image comparison logic with adjustable thresholds, support for parallel processing, and the ability to generate reports from pre-existing JSON data. It requires Node.js v18 or newer for execution, ensuring compatibility with modern JavaScript environments. It is primarily used via its CLI but also exposes a programmatic API for integration into custom build workflows.