Function formatContextMeter

src/cli/viewport.ts:75–82

(used: number, window: number, barWidth = 10)

 * Returns '' when the window size is unknown (nothing useful to show).
 */
export function formatContextMeter(used: number, window: number, barWidth = 10): string {
  if (!window || window <= 0 || used <= 0) return '';
  const pct = Math.min(100, Math.round((used / window) * 100));
  const filled = Math.min(barWidth, Math.round((pct / 100) * barWidth));
  const bar = '█'.repeat(filled) + '░'.repeat(barWidth - filled);
  const k = (n: number) => (n >= 1000 ? `${(n / 1000).toFixed(n >= 10000 ? 0 : 1)}k` : String(n));
  return `${k(used)}/${k(window)} ${bar} ${pct}%`;
}