Function getTaskOutputDelta

src/utils/task/diskOutput.ts:304–330

(
  taskId: string,
  fromOffset: number,
  maxBytes: number = DEFAULT_MAX_READ_BYTES,
)

 * Reads only from the byte offset, up to maxBytes — never loads the full file.
 */
export async function getTaskOutputDelta(
  taskId: string,
  fromOffset: number,
  maxBytes: number = DEFAULT_MAX_READ_BYTES,
): Promise<{ content: string; newOffset: number }> {
  try {
    const result = await readFileRange(
      getTaskOutputPath(taskId),
      fromOffset,
      maxBytes,
    )
    if (!result) {
      return { content: '', newOffset: fromOffset }
    }
    return {
      content: result.content,
      newOffset: fromOffset + result.bytesRead,
    }
  } catch (e) {
    const code = getErrnoCode(e)
    if (code === 'ENOENT') {
      return { content: '', newOffset: fromOffset }
    }
    logError(e)
    return { content: '', newOffset: fromOffset }
  }
}

/**
 * Get output for a task, reading the tail of the file.