nx_metric_ledger_gate.nx

nx_metric_ledger_gate.nx -- proves the return-and-report primitive's trend mechanics. After the first report of a metric (whose verdict depends on ledger history and is NOT asserted -- idempotent, rule #10), every subsequent assert is deterministic: lower-is-better metrics report BETTER on decrease / WORSE on increase / FLAT on equal, higher-is-better the mirror -- and the ledger row round-trips (ml_prev reads back exactly what ml_report appended). RED on any wrong verdict = the feedback loop itself is broken. expect_exit: 0 license_tier: ORIGINAL