A very nice feature. It needs still some extra-scripting due to missing the cooking recipes where to use the resources gathered so it's 50% plug & play, but a very useful resource for anyone who wish to spend some time implementing new things.
I recommend to script also the fact that you need another kind of hatchet (named tree hatchet) to turn boards into logs while the std hatchetwith a small script modification should have been enough and more rpg like to handle all.
Very cool the harvest tool menu with all his features.