/**
 * `ruflo cost report` (ADR-508 §2.3): which subagent types and tools spent the
 * money, from the lines the ruflo-mods cost ledger writes to
 * `.claude-flow/cost/attribution.jsonl` (one per session; see
 * plugins/ruflo-mods/hooks/cost/attribution.ts `attributionLine`).
 *
 * The file is project-writable, so every line is validated to a fixed shape;
 * a bad line is skipped and counted, never trusted.
 */
export declare const ATTRIBUTION_PATH = ".claude-flow/cost/attribution.jsonl";
export interface AttributionLine {
    endedAt: number;
    totalUsd: number;
    byAgent: Record<string, number>;
    byTool: Record<string, number>;
    refusals: number;
}
/** One line validated, or undefined. */
export declare function parseAttributionLine(text: string): AttributionLine | undefined;
export interface AttributionReport {
    sessions: number;
    skipped: number;
    totalUsd: number;
    refusals: number;
    byAgent: [string, number][];
    byTool: [string, number][];
}
/** The report over the file's lines, optionally only sessions that ended at or after `since` (ms). */
export declare function summarize(text: string, since?: number): AttributionReport;
/** Reads the project's attribution file; an absent file is an empty report. */
export declare function readAttribution(cwd: string, since?: number): {
    report?: AttributionReport;
    error?: string;
};
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