Ganttdown turns GitHub-Flavored Markdown task lists into beautiful Gantt chart SVGs. No SaaS logins, no drag-and-drop, just write tasks in Markdown you already know, run one command, and get a presentation-ready chart. Single binary, zero dependencies, sub-second execution. Flexible parsing for dates, assignees, and dependencies. Color-coded task status. Dependency validation and arrows. Fully scriptable: pipes, redirects, and CI/CD ready.