Super cool!

I'm completely sold on the canvas layer. Embracing non linearity is such a boon when you're on the ideas stage. When you have verified it though, moving it to another medium (a document, presentation or just code) is often the best choice.

Do you see the canvases created with Spine as "one off" that you discard when you have got your deliverable, or as something living that you keep around?

I'm building a side project for running SQL on a canvas (kavla.dev), so I'm thinking about canvas workflows all the time!