export declare const CODEX_VERSION_PATTERN: RegExp;
export interface CodexJsonlRecordAtOffset {
    value: Record<string, any>;
    offsetBytes: number;
}
export declare function parseCodexJsonlRecords(buffer: Buffer, label: string): CodexJsonlRecordAtOffset[];
export declare function assertExistingCodexRolloutHeader(buffer: Buffer, nativeThreadId: string): string;
/**
 * Persisted anchors must check the history contract without widening their
 * existing thread/version requirements. Older legacy headers can be minimal.
 */
export declare function assertCodexRolloutLegacyHistory(buffer: Buffer): void;
export declare function positiveByteLimit(value: number | undefined, fallback: number, label: string): number;
export declare function safeByteOffset(value: unknown, label: string): number;
type ExactCodexTaskCompleteScan = {
    status: "completed";
    text: string;
    timestamp?: string;
    scannedRecords: number;
    observedTaskCompleteRecords: number;
    observedTurnAbortedRecords: number;
} | {
    status: "aborted";
    reason?: string;
    timestamp?: string;
    scannedRecords: number;
    observedTaskCompleteRecords: number;
    observedTurnAbortedRecords: number;
} | {
    status: "pending";
    scannedRecords: number;
    observedTaskCompleteRecords: number;
    observedTurnAbortedRecords: number;
} | {
    status: "failure";
    code: "invalid_rollout_jsonl" | "duplicate_exact_completion" | "duplicate_exact_abort" | "conflicting_exact_settlement" | "later_turn_started" | "invalid_exact_completion" | "invalid_exact_abort";
    detail: string;
    scannedRecords: number;
    observedTaskCompleteRecords: number;
    observedTurnAbortedRecords: number;
};
export declare function scanExactCodexTaskComplete(text: string, acceptanceId: string): ExactCodexTaskCompleteScan;
export declare function truncateCompletionText(value: string): string;
export declare function exactCodexUserResponseText(content: unknown): string | undefined;
export declare function isRetryableProviderIoError(error: unknown): boolean;
export declare function optionalString(value: unknown): string | undefined;
export declare function fingerprintText(value: string): string;
export declare function isRecord(value: unknown): value is Record<string, any>;
export {};