export declare const GATE_CACHE_FILE = "gate-cache.json";
export interface GateCacheEntry {
    key: string;
    /** Wall-clock seconds the original green run took (reported as savings on a hit). */
    seconds: number;
    at: string;
}
/** sha256 of the file's bytes, or "<label>:none" when it does not exist — an
 *  absent quarantine list / TIA map is a stable, distinct key component. */
export declare function hashFileOrAbsent(file: string, label: string): string;
/** Affected-gate key — covers EVERY input that selects or scopes tests: the
 *  candidate tree, the base tree (affected-selection diffs against
 *  MQ_AFFECTED_BASE), the gate command string, the quarantine file content, and
 *  the TIA map content (when a map exists it changes which tests run). */
export declare function affectedGateKey(parts: {
    candidateTree: string;
    baseTree: string;
    command: string;
    quarantineHash: string;
    tiaMapHash: string;
}): string;
/** Full-gate key — selection inputs do not apply: tree + command + quarantine. */
export declare function fullGateKey(parts: {
    tree: string;
    command: string;
    quarantineHash: string;
}): string;
export declare function lookupGateCache(mqDir: string, key: string): GateCacheEntry | null;
/** Record a GREEN result. Green-only is enforced by the API — red/timeout results
 *  have no entry point here. Size-capped: oldest entries beyond maxEntries are
 *  pruned; maxEntries <= 0 disables the cache. Atomic write (tmp + rename) so a
 *  concurrent daemon/poller writer never leaves a torn file; a lost write race
 *  drops one entry at worst (this is a cache, not a ledger). */
export declare function recordGateCache(mqDir: string, entry: GateCacheEntry, maxEntries: number): void;
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