/**
 * tokens:stats command - Show token compression statistics from run journals
 *
 * Usage:
 *   babysitter tokens:stats [runId] [--json] [--all] [--runs-dir <dir>]
 *
 * With runId: reads journal for that run, finds COMPRESSION_APPLIED events, prints table
 * With --all: aggregates across all runs in the runs directory
 * With --json: outputs JSON instead of table
 */
export interface CompressionEventData {
    runId: string;
    effectId?: string;
    sessionId?: string;
    layer: "1a" | "1b" | "2" | "3";
    tool: "imptokens" | "rtk" | "open-thetokenco";
    contentType: "user_prompt" | "bash_output" | "agent_task_context" | "task_result" | "process_library_file";
    originalTokens: number;
    compressedTokens: number;
    tokensSaved: number;
    reductionPct: number;
    durationMs?: number;
    model?: string;
    [key: string]: unknown;
}
export interface CompressionEvent {
    type: "COMPRESSION_APPLIED";
    recordedAt: string;
    checksum?: string;
    data: CompressionEventData;
}
export interface JournalEventRaw {
    type: string;
    recordedAt?: string;
    checksum?: string;
    data?: unknown;
}
export interface RunCompressionStats {
    runId: string;
    date: string;
    eventCount: number;
    originalTokens: number;
    compressedTokens: number;
    tokensSaved: number;
    reductionPct: number;
    byLayer: Record<string, LayerStats>;
}
export interface LayerStats {
    eventCount: number;
    originalTokens: number;
    compressedTokens: number;
    tokensSaved: number;
}
export interface AggregateStats {
    totalRuns: number;
    totalEvents: number;
    totalOriginalTokens: number;
    totalCompressedTokens: number;
    totalTokensSaved: number;
    overallReductionPct: number;
    runs: RunCompressionStats[];
}
export interface TokensStatsOptions {
    runId?: string;
    all?: boolean;
    json?: boolean;
    runsDir?: string;
}
export declare function handleTokensStats(options: TokensStatsOptions): Promise<number>;
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