Councilman Spade is an animal control nut. Not only does every pet in town have to get a microchip implanted, but those chips have to be encrypted on a per-species basis. Fortunately, you have access to all the encryption keys. (This is a metapuzzle. You'll have to figure out which answers from daily puzzles can be used to solve this one.)
GULDRKN
YWPDRHW
TCLKSOA
YSROFGM
What can you build to win Spade's approval?
Hints: There are no hints for the metapuzzles!