This is really cool! Do you develop all of Mesh in itself exclusively, or do you still use a regular text editor as well? Either way I can certainly see this as being useful. I starred the project on GitHub and look forward to see what more is to come.

Aside from the SQL support you mentioned wanting to add, and the various todo-items, are you planning on going beyond the spreadsheet concept? For example with some type of node-based interface, like Unreal Engine 4 Blueprints [1], or like the materials editor in Blender [2]? I realize that might be a vague question, heh.

[1]: https://docs.unrealengine.com/en-US/Engine/Blueprints/index....

[2]: https://docs.blender.org/manual/en/latest/editors/shader_edi...