Function truncateOutput

packages/opencode-atomic-hooks/src/handlers/tool.ts:287–294

(output: string | undefined)

 * @returns Object with optional `tool_output` field
 */
export function truncateOutput(output: string | undefined): { tool_output?: string } {
  if (!output) return {}

  const trimmed = output.substring(0, MAX_TOOL_OUTPUT_LENGTH)
  if (trimmed.length === 0) return {}

  return { tool_output: trimmed }
}