/**
 * ADR-0020: `graph --gate-save` (the `graph:ci` dogfood gate) must HARD-FAIL the
 * step on an error-level finding (core's `isErrorSignal` rung: `critical`/`high`),
 * not exit 0 and lean entirely on the downstream Code Scanning net-new ratchet.
 * These tests pin that exit-code contract for `runGateMode`'s gate-save branch —
 * the graph mirror of `fitness/.../fit-gate-mode.test.ts`.
 *
 * The `signals` array reaching `runGateMode` is the already suppression-filtered
 * (`@graph-ignore`, ADR-0014) `kept` set (see `cli/graph.ts`), so an error-rung
 * signal here is by definition UNSUPPRESSED — exactly what should trip the gate.
 * We drive the verdict directly via the signal set rather than mocking the engine.
 */
export {};
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