Any docs about 2D sprite animation format?

Question

Godot is an easy to use game engine. I'm developing a sprite animation tool recently. I want to export sprite animations into Godot. Is there any format docs for sprite animation? (Something like Spriter's scml)

I know there's a way to import animations frame by frame but it doesn't import the timing as well. I have to adjust the timing in godot editor after importing everytime I make changes to the anmation. It's a little tedious workflow.

Comments

I don't know about docs but maybe you can work on spritesheets and use animationplayer to change frames, animations can be saved and loaded as tres files and edited as text (I think all text scenes and resources are in TOML format).