Iteration-1 plan for #157 §A+§B: the eager/holistic gate split (extract
edge_kind_check + shared name-resolution helpers + try_bind, all reusing the
engine's gates — no second validator), the GraphSession/Op/replay per-op
surface, build-free unwired/vocabulary introspection, and the acceptance-1
replay-equals-GraphBuilder compile-identity test. The JSON op-list + CLI are
iteration 2. Eight RED-first tasks; struct literals + filter strings verified
against the current tree.
refs #157
Brummel
a5b887a955