Liquid Prompt is a feature-rich, adaptive shell prompt for Bash and Zsh. It dynamically displays contextual information such as VCS status (Git, Mercurial, Subversion, Fossil, Bazaar), system load, battery level, temperature, Wi-Fi signal, and more. The prompt is highly configurable via environment variables, config files, themes, and presets. The architecture is a monolithic shell script (~5000 lines) with a theme engine that allows custom prompt layouts. It includes a comprehensive test suite using shunit2, CI across 20+ shell versions, and extensive documentation. The codebase is actively maintained with regular releases and deprecation paths for older features.