owner: metal qsa kernels and moe parity harness only. preserve layouts, dispatch contracts, flags, fma order. baseline: copied working tree. test paired memcmp and 12-round median A/B at P=3000,10180,30000; reject any mismatch or repeatable slowdown. GPU tests serialized, each <=15s (cold compile <=20s). no server/full-model access. two confirmation sweeps for neutral/faster candidates. prompt/moe references are tolerance checks, not bitwise checks.