Oops, edit because I read no till, not no dig. Got too excited.
I did that for many years in my garden. I formed raised beds out of the soil, and added grass clipping and leaves yearly to the top, and walking paths. It was a wonderful way to garden.
I had to get my knees replaced, so we build raised garden boxes and filled them with all that wonderful soil the worms helped me create.
I always say take care of the worms and they will take care of your plants. Tilling destroys the soil, which is like a living organism, tilling kills the biodiversity that's in your gardens and it needs to rebuild itself after a tilling. Worms are the workhorse of a garden. They aerate, and fertilize plants. Take care of the worms.