/** Minimal stat surface shared by the secure and platform filesystems. */
interface StatCapableFs {
    stat(path: string): Promise<{
        isFile: boolean;
    }>;
}
/**
 * Resolve the first path in `paths` order that exists as a file, or null.
 * All candidates are stat-probed in parallel; order of `paths` decides the
 * winner, not which probe resolves first.
 */
export declare function findFirstExistingFile(fs: StatCapableFs, paths: string[]): Promise<string | null>;
export {};
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