Function projectMonthly

src/cli/maintain-stats.ts:98–102

(runs: MaintainRun[], nowMs: number)

/** Project the going rate forward: cleanups + minutes saved per month, from the last 28 days. PURE. */
export function projectMonthly(runs: MaintainRun[], nowMs: number): { cleanupsPerMonth: number; minutesPerMonth: number } {
  const since = nowMs - 28 * 86_400_000;
  const recent = runs.filter(r => r.status === 'opened' && r.at && Date.parse(r.at) >= since).length;
  return { cleanupsPerMonth: recent, minutesPerMonth: recent * 5 };
}

export interface MaintainForecast {
  weeklyAvg: number;                               // mean opened/week over the window