3-layer MLP forward (Linear→ELU→Linear→ELU→Linear). Pre-loaded
CudaFunction for graph-capture safety per pearl_no_host_branches_in_captured_graph.
Oracle test verifies bit-for-bit match against numpy reference within
1e-4 tol. Saves h_aux1 and h_aux2 to global memory for backward.
Phase C.3 of SP14 Layer C separate-aux-trunk refactor (plan:
docs/superpowers/plans/2026-05-07-sp14-layer-c-separate-aux-trunk.md).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>