Chess Mentor V3 can load chess.js from this folder for offline use.
Run setup-offline.ps1 (Windows) or setup-offline.sh (macOS/Linux) from the app folder.
The setup script downloads chess.js 1.4.0 into vendor/chess.js and Stockfish 18 Lite into engine/.
Without the local chess.js file, the app falls back to the pinned jsDelivr module and requires internet access for that dependency.
