/**
 * Debug artifact saving for pi-omni-compact.
 *
 * When enabled, saves compaction input/output as timestamped JSON files
 * for post-mortem analysis of bad compactions.
 */
export interface CompactionDebugData {
    model: string;
    input: string;
    systemPrompt: string;
    output?: string;
    error?: string;
    timestamp: string;
}
/**
 * Save compaction debug artifacts to disk.
 * No-ops when disabled. Swallows all write errors.
 */
export declare function saveCompactionDebug(enabled: boolean, data: CompactionDebugData, debugDir?: string): void;
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