nx_wflow_version_gate.nx

nx_wflow_version_gate.nx -- R12 VERSIONING gate: `@version N` directive in the flows file (loader skips @ directives), every fired run stamps a durable WFVER record, and resume RECORDS version drift (WFVERDRIFT) when a run started under a different definitions version -- resume proceeds (additive semantics) with the drift visible forever. Unversioned defs = no WFVER (back-compat). Draft-test-live = the same loaders behind the CLI verify command (whole-set validation without firing). ZERO forks. license_tier: ORIGINAL expect_exit: 0