Function appendCapped

src/tools/browser/process-registry.ts:46–52

Truncate a buffer from the front, keeping the tail.

(buf: string, chunk: string)

/** Truncate a buffer from the front, keeping the tail. */
function appendCapped(buf: string, chunk: string): string {
  const combined = buf + chunk;
  if (combined.length <= MAX_BUFFER_BYTES) return combined;
  // Drop the oldest 25% to avoid copying on every single line of output.
  const keepFrom = Math.floor(MAX_BUFFER_BYTES * 0.75);
  return '…[earlier output truncated]…\n' + combined.slice(combined.length - keepFrom);
}

export interface StartOptions {
  name: string;