Function recommend_for_node 

pub fn recommend_for_node(
    node: &Node,
    table: &DispatchTable,
    criterion: Criterion,
) -> Option<DeviceLocation>

Single-node recommendation. Public so callers that already have a node in hand (e.g. during a custom graph rewrite pass) can ask the dispatch table directly without building the full plan.

SizeClass note (v4). This legacy DispatchTable placement path keys every op — including matmul — on the OUTPUT node’s elem_count() (SizeClass::from_elem_count), which is aspect-blind. The fuel-dispatch ranker and the fuel-core Judge now key matmul on the v4 aspect key (SizeClass::matmul / for_op, (m,n,k) packed). Matching them here needs the contraction dim k, which is only reachable from the input operand shapes — not the output shape this graph-less helper receives — so a matmul lookup against an aspect-keyed profile report misses and falls back to pick_nearest / fallback_device. Reconciling this transitional path (thread the operand shapes and call SizeClass::for_op) is a tracked follow-up; the primary matmul dispatch now flows through the ranker.