He Lives Above Our Compost Pile...

...but I do not know his name.

 For weeks, he's been living in a fine web which he built across the corner of our wooden box (cage? structure? thingamajigger?) at the edge of our garden.  Because spiders don't particularly scare me, I've mostly let him be, although I did throw a bunch of raked-up leaves on top of the compost one evening, and that disturbed his web enough that he rebuilt it in a different corner.  I haven't felt the urge to kill him because I don't think he's hurting anyone, and it's not a place where my little ones could even reach him and possibly get bitten.  I'm not sure why I think of him as a he, but I do.

But the real mystery is...

...what kind of spider is he?  The top photo shows his front side (I think), and the bottom photo shows his other side.  Besides spinning his web, I never see him do much; but he's almost always there when I toss scraps in that pile.

Who are you, Mr. Spider?