[krsdcbl]

tbh I'm glad, not sure about patching in an extra magic keyword with it's own set of new properties to achieve one specific layout pattern popularized by a jQuery lib in css grid module.

It would have been much cleaner to add "auto-span" utility to grid-column and grid-row that allow to define "overflow snapping" if items are larger than template definitions, with an option for grid-auto-flow to affect packing logic

This draft feels like it's solving a single use case by stacking presets over the grid api instead of exposing tools to achieve that use case