Function carry_flush_kernel 

pub fn carry_flush_kernel(gpu: &dyn GpuBackend) -> KernelHandle

2026-10-01: The fold of pending rows (gdn_carry_flush), or under the exact verify the model directory’s twin (gdn_exact_carry_flush), which every directory with the exact twins defines: one whose strided decode clamps the state after each update folds with the same clamp. Shared by the layer’s fold and the model’s (model-engine gdn_carry.rs).