I seem to remember seeing a version of directx 11 sdk that was implemented in directx12 on the microsoft website but I can't seem to find it anymore. Does any one else remember ever seeing this project or was it some kind off fever dream I had? It would be a nice tool for slowly porting my massive amount of directx 11 code to 12 overtime.

Is this what you were looking for?

https://github.com/Microsoft/DirectX-Graphics-Samples/tree/master/Samples/Desktop/D3D1211On12

Sadly no.  What I'm looking for is a directx 12 wrapper with a directx 11 interface.

Pretty sure @ZachBethel is right: https://msdn.microsoft.com/en-us/library/windows/desktop/dn913195(v=vs.85).aspx

Yeah. This is it. Got the impressions this was just for passing buffers back and forth. Thanks all!