Replace personal fork (rltakashige/mlx-jaccl-fix-small-recv) with the org-owned fork (exo-explore/mlx) on the pipe-sidechannel branch. This branch contains the C++ SideChannel pipe mode that provides the MLX_JACCL_PIPE_IN/MLX_JACCL_PIPE_OUT env var support needed by the JACCL pipe relay. Co-Authored-By: Claude Opus 4.6 <[email protected]>