Screenshotbot is a comprehensive screenshot testing and visual regression tracking service built with Common Lisp. It provides a self-hostable platform that integrates with CI/CD systems to capture, compare, and report on screenshots from mobile and web tests. The system features a multi-tier architecture with a Lisp backend (using Hunchentoot), Bootstrap-based frontend, custom object persistence layer, and extensible plugin architecture for integrations with version control systems (GitHub, GitLab, etc.) and communication platforms (Slack, Email). Key components include SDKs for Android/Firebase integration, a Gradle plugin for Android builds, and a CLI tool for CI workflow integration. The platform includes user authentication, team management, role-based access control, audit logging, and a dashboard for visualizing test results.