Accessing Sprite mesh from editor script

Hi, I really appreciated the introduction of the Edit Outline feature in Sprite Editor. Unfortunately, I need to adjust hundreds of sprites, and doing it manually it's just insane.

Is it possible (or is it planned to be so) to access/modify/define Sprite meshes ("outline") using Editor scripts? (or, just in case it's not possibile at all, anyone knows when tight packed sprites will be working in canvas rendering as well?)

Thanks! :)