nx_wflow_branch_gate.nx

nx_wflow_branch_gate.nx -- R9 MID-FLOW BRANCHING gate: optional 7th step field `k=v` evaluated against the run VARIABLE plane at execution. Match -> step runs; mismatch OR missing variable -> status=SKIP recorded in the ledger and the flow continues (Zapier-filter semantics, event-sourced). Dash or absent field = always run (every pre-R9 definition stays valid). Proves: the SAME flow branches on event data; var-derived conditions (set-var then branch); load refuses garbage conditions. ZERO forks. license_tier: ORIGINAL expect_exit: 0