Can you document how to write the JSON dialogue filew for this system? I just installed your system and already I have no idea how to test my own dialogue because I can't understand what's going on in your demo's dialogue files.
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This documentation should help you a bit: https://radmatt.itch.io/godot-3-dialogue-system-documentation. I've updated the docs with a new category (see 8. File Structure).
JSON files are difficult to write by hand, so I made a software for that: https://radmatt.itch.io/dialogue-designer. It it tightly integrated with this dialogue system so there's no need to modify the files by hand.