export type { SessionStats, ToolUsageStats } from './session.js';
export type { Insight } from './detectors/index.js';
export { defaultClaudeProjectsRoot } from './walker.js';
export interface ScanResult {
    /** Total cost across all sessions ever recorded, in USD. */
    totalCostUsdAllTime: number;
    /** Total cost across sessions started in the last 7 days, in USD. */
    totalCostUsdLast7Days: number;
    /** Number of .jsonl session files found. */
    filesScanned: number;
    /** Number of sessions (files) parsed. */
    sessionsScanned: number;
    /** All ranked insights, highest savings first. */
    insights: import('./detectors/index.js').Insight[];
    /** Total estimated savings across all insights, in USD. */
    totalSavingsUsd: number;
}
/**
 * Scan the local Claude Code session directory and return a structured result.
 *
 * @param root  Path to the Claude projects root (defaults to ~/.claude/projects).
 *              Pass `undefined` to use the default.
 */
export declare function scan(root?: string): Promise<ScanResult>;
/** Format a ScanResult as a human-readable text summary. */
export declare function formatSummary(result: ScanResult): string;
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