After sp5 merge with -X theirs, two compile errors needed manual fix: - gpu_her.rs lost the DevicePtrMut trait import - gpu_tlob.rs Fix 20 regression test used the 4-arg adam_step signature before sp5's Pearl 4 added β1/β2/ε params. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>