Amber Rose & Blac Chyna Reunite ... Making 'Hoe History'

Amber Rose was forgiveness for Halloween -- she happily welcomed her main chick Blac Chyna back into the fold after all that Future drama.

Chyna posted a photo of the on-again/off-again BFFs cuddling up in their costumes ... the first pic she's posted of them together since bailing on Amber's Slut Walk. Remember, she missed it because she was hanging with Future in D.C.

Now that Future's declaring bachelor status, it looks like all's good with Amber again. BC summed the reunion with another post about "hoe history" and "happiness."

Poetic ...