Function shortErrorStack

src/utils/errors.ts:161–171

(e: unknown, maxFrames = 5)

 * waste context tokens. Keep the full stack in debug logs instead.
 */
export function shortErrorStack(e: unknown, maxFrames = 5): string {
  if (!(e instanceof Error)) return String(e)
  if (!e.stack) return e.message
  // V8/Bun stack format: "Name: message\n    at frame1\n    at frame2..."
  // First line is the message; subsequent "    at " lines are frames.
  const lines = e.stack.split('\n')
  const header = lines[0] ?? e.message
  const frames = lines.slice(1).filter(l => l.trim().startsWith('at '))
  if (frames.length <= maxFrames) return e.stack
  return [header, ...frames.slice(0, maxFrames)].join('\n')
}

/**
 * True if the error means the path is missing, inaccessible, or