Function weeklyReport

src/cli/maintain-stats.ts:133–150

(runs: MaintainRun[], nowMs: number)

/** Week-over-week self-improvement report from run timestamps. PURE (pass `nowMs`). */
export function weeklyReport(runs: MaintainRun[], nowMs: number): MaintainWeekly {
  const DAY = 86_400_000;
  const inWindow = (r: MaintainRun, from: number, to: number) => {
    const t = r.at ? Date.parse(r.at) : NaN;
    return Number.isFinite(t) && t >= from && t < to;
  };
  const thisWeek = runs.filter(r => inWindow(r, nowMs - 7 * DAY, nowMs));
  const priorWeek = runs.filter(r => inWindow(r, nowMs - 14 * DAY, nowMs - 7 * DAY));
  const opened = thisWeek.filter(r => r.status === 'opened');
  return {
    opened: opened.length,
    blocked: thisWeek.filter(r => r.status === 'blocked').length,
    filesCleaned: opened.reduce((a, r) => a + (r.filesChanged || 0), 0),
    minutesSaved: opened.length * 5,
    priorOpened: priorWeek.filter(r => r.status === 'opened').length,
    openedDelta: opened.length - priorWeek.filter(r => r.status === 'opened').length,
  };
}