backend/

• lib.rs - the heavy number crunching
• raw.rs - data structures imported from CCP's data files
• data.rs - data structures used by the backend for live pathfinding
• web.rs - the web interface
• cli.rs - the CLI interface

src/ - the React frontend

• api.tsx - a simple wrapper around the backend API
• routes/ - a .tsx file for each page on the site

tools/ - various scripts for fetching and processing data