/** Verified in-place compression for sealed, non-terminal legacy V1 shards. */
export interface LegacyV1CompressionEntry {
    filename: string;
    path: string;
    bytes_before: number;
    bytes_after: number | null;
    action: "keep" | "would-compress" | "compressed";
    reason: string;
}
export declare function compressSealedLegacyV1Segments(coordRoot: string, opts?: {
    yes?: boolean;
}): Promise<LegacyV1CompressionEntry[]>;
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