Leylandii chippings

interesting...in no dig its not seen as an incursion but just plants doing there thing. no spade needed.

 

I think if your planted areas and the paths are at the same level, and there's no physical barrier, it might be a good idea to put one in. Doesn't have to be terribly high, but will give you the scope to add plenty of organic matter to the beds, and therefore benefit the plants themselves.
The paths would also be better separated from that, so if anything was growing more strongly, it would hopefully be less likely to get into the paths as well.

 

When you have used the material for 10 or 20 years please let us know what you have learnt.

 

The bottom half of my raised vegetable bed was leylandii chippings - no problem at all.