So this is the supervest mod!

I like it. But I think the vest should be reproducible. Everything in the game can be reproduced, with the exception of those stupid Alien Hunters weapons. Might I suggest givng the vest really steep fabrication requirements, e.g. 100 supplies, 100 elerium crystals (no elerium cores though; I just don't see the reason why AP ammo requires a EC since its remachined Alien Alloys).

"Added one custom proving grounds project." - You lost me on this one. What is the "item?"

Disregard. I figured it out.

Exactly how does this mod function? Is there a player interface? Is it similar to the dev's "auto-resolve" option? Is there an actual button somewhere that says "resolve mission without actually playing it"?

This is great, creates less reliance on RNG for your tactics so you don't feel like you got cheated on a critical failure.