/** Forward-only, request-local references. Never rewrite a previous observation.
 * Exact string keys verify equality, not just a digest. The budget bounds retained
 * text and reference metadata; eviction only loses compression opportunities.
 */
export declare class ResponseDedup {
    private readonly seen;
    private bytes;
    replace(text: string, at: string): string;
}
/** Only peel the complete, known Codex transport header. Preserve it on every
 * observation, including exit status. Arbitrary content containing "Output:"
 * is not a transport envelope and must never be split heuristically.
 */
export declare function responseEnvelope(text: string): {
    header: string;
    body: string;
};
/** Patch just one JSON string value, preserving every other lexical byte. An
 * ambiguous duplicate/nested key is deliberately ineligible. JSON parsing is
 * used for validation, never to reserialize large integers or unknown metadata.
 */
export declare function replaceJsonText(text: string, key: 'output' | 'stdout' | 'stderr', value: string): string;
/** The actual functions.exec wire payload wraps shell output in JSON with a
 * changing chunk ID and wall time. Preserve that envelope on every observation.
 */
export declare function responseJsonEnvelope(text: string): string | undefined;
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