Function formatExecuteResult

packages/core/execution/src/engine.ts:136–191

(
  result: ExecuteResult,
)

    : value;

export const formatExecuteResult = (
  result: ExecuteResult,
): {
  text: string;
  structured: Record<string, unknown>;
  isError: boolean;
} => {
  const resultText =
    result.result != null
      ? typeof result.result === "string"
        ? result.result
        : JSON.stringify(result.result, null, 2)
      : null;

  const logText = result.logs && result.logs.length > 0 ? result.logs.join("\n") : null;

  // `emit()` output is shown to the user, not returned to the model, so a
  // script that only emits comes back with a null result. Acknowledge the
  // emitted items in the envelope so an emit-without-return reads as "output
  // went to the user" rather than a silent void.
  const emitted = result.output?.length ?? 0;
  const emittedNote =
    emitted > 0 ? `${emitted} item${emitted === 1 ? "" : "s"} emitted to the user` : null;
  const emittedField = emitted > 0 ? { emitted } : {};

  if (result.error) {
    const parts = [`Error: ${result.error}`, ...(logText ? [`\nLogs:\n${logText}`] : [])];
    return {
      text: truncate(parts.join("\n"), MAX_PREVIEW_CHARS),
      structured: {
        status: "error",
        error: result.error,
        ...emittedField,
        logs: result.logs ?? [],
      },
      isError: true,
    };
  }

  const resultPart = resultText
    ? truncate(resultText, MAX_PREVIEW_CHARS)
    : emittedNote
      ? `(no return value; ${emittedNote})`
      : "(no result)";
  const parts = [resultPart, ...(logText ? [`\nLogs:\n${logText}`] : [])];
  return {
    text: parts.join("\n"),
    structured: {
      status: "completed",
      result: result.result ?? null,
      ...emittedField,
      logs: result.logs ?? [],
    },
    isError: false,
  };
};

export const formatPausedExecution = (