import type { JournalEvent } from './types.js';
export interface MqStats {
    arrivalsLast24h: number;
    landedTotal: number;
    gateRuns: {
        green: number;
        red: number;
        timeout: number;
    };
    medianGateSeconds: number | null;
    flakesLast7d: number;
    /** D12: gate_cached events — batches that skipped the gate entirely. */
    gateCacheHits: number;
    gateCacheSecondsSaved: number;
    /** D12/D14: poller full-gate runs, split by coverage instrumentation so the
     *  TIA recording overhead stays visible (spec §11). */
    fullGatePlain: {
        runs: number;
        medianSeconds: number | null;
    };
    fullGateInstrumented: {
        runs: number;
        medianSeconds: number | null;
    };
    /** D14: the most recent coverage-map recording, or null when none exists. */
    tiaLastRecorded: {
        at: string;
        tests: number;
        files: number;
    } | null;
}
export declare function computeStats(events: JournalEvent[], now: Date): MqStats;
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