Function encodeErrorFrame

packages/start-server-core/src/frame-protocol.ts:79–83

(streamId: number, error: unknown)

 * Encodes a raw stream error frame.
 */
export function encodeErrorFrame(streamId: number, error: unknown): Uint8Array {
  const message =
    error instanceof Error ? error.message : String(error ?? 'Unknown error')
  return encodeFrame(FrameType.ERROR, streamId, textEncoder.encode(message))
}

/**
 * Creates a multiplexed ReadableStream from JSON stream and raw streams.