/**
 * progress-tracker.ts
 *
 * Extension: Progress Tracker
 * Triggers: on_session_end
 *
 * Tracks weekly activity across skills and sessions.
 * Surfaces burnout prevention nudges and weekly summaries.
 */
import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
export interface SessionRecord {
    date: string;
    durationMinutes: number;
    skillsUsed: string[];
    topicsWorked: string[];
}
export interface WeeklyStats {
    totalMinutes: number;
    sessionCount: number;
    skillBreakdown: Record<string, number>;
    longestSession: number;
    streak: number;
}
export declare function getBurnoutNudge(sessionDurationMinutes: number, stats: WeeklyStats): string | null;
export declare function buildWeeklySummary(stats: WeeklyStats): string;
export default function (pi: ExtensionAPI): void;
export declare function run(context: {
    sessionDurationMinutes: number;
    skillsUsed: string[];
    topicsWorked?: string[];
}): {
    nudge: string | null;
    weeklySummary: string;
};
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