What is this caterpillar/larva/worm? compost is full of them

[creationsld]

I had the same bugs in my garden on Sunday that I removed as much as I could and today when I looked it was like there were there all over again. I am glad to know that they are harmless. My worm bin also has tons of mites. At the moment the compost is mushy but I am letting the sun bake it in hopes that it will dry up a bit.