Function createToolUseSummaryMessage

src/utils/messages.ts:5105–5116

(
  summary: string,
  precedingToolUseIds: string[],
)

 * Tool use summaries provide human-readable progress updates after tool batches complete.
 */
export function createToolUseSummaryMessage(
  summary: string,
  precedingToolUseIds: string[],
): ToolUseSummaryMessage {
  return {
    type: 'tool_use_summary',
    summary,
    precedingToolUseIds,
    uuid: randomUUID(),
    timestamp: new Date().toISOString(),
  }
}

/**
 * Defensive validation: ensure tool_use/tool_result pairing is correct.