nx_wflow_capture_gate.nx

nx_wflow_capture_gate.nx -- R8b STDOUT-CAPTURE gate: exec-organ channel `connector>varname` pipes the child organ's stdout (bounded 480B, newlines to spaces, trailing space trim, LOUD over-cap) into the run variable plane -- a step's OUTPUT becomes later steps' INPUT (the full Zapier dataflow shape). Proves: captured value lands as WFVAR and substitutes into the next step's arg; capture only on exit 0; plain connector (no >) captures nothing (back-compat); load refuses empty connector or empty var. TWO forks. license_tier: ORIGINAL expect_exit: 0