export declare const EVIDENCE_CHUNK_BYTES = 65536;
export declare const SEARCH_OVERLAP_BYTES = 1024;
export declare function digest(value: string | Uint8Array): string;
export declare function textFilter(text: string): string;
export declare function mayContain(filter: string, query: string): boolean;
/** Negative-only membership filter using the same whole-token keys as discovery. */
export declare function tokenFilter(text: string): string;
export declare function mayContainToken(filter: string | undefined, query: string): boolean;
/** Internal manifest, authenticated by the digest recorded in tool_completed. */
export interface SpillManifest {
    version: 1;
    bytes: number;
    chars?: number;
    chunkBytes: number;
    chunks: {
        sha256: string;
        filter: string;
        tokenFilter?: string;
        characterOffset?: number;
    }[];
}
/** Optional acceleration must not reduce the previously retainable output size. */
export declare function encodeSpillManifest(manifest: SpillManifest): string;
export declare function spillManifest(bytes: Buffer): string;
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