First time trying to create a kumiko pattern, apparently there are different variations.
So, creating the patterns are pretty simple, especially with snap to grid on. I think most vector programs would perform the same. I expect converting the “tile” to a pattern would be the same too. I think revisions are easier with Cuttle, but that may be due to familiarity.
I did a quick version, I think there are probably a dozen more ways to do it. I realized afterwards you would want a pattern to cut out and had to add a mask to remove the outer border.
The time consuming part would be making it fully parametric. But I think something like this https://www.kumikodesigner.com/ would be possible. It would be interesting to create and label the patterns likw “asa-no-ha” etc…