Function executeSubagentStartHooks

src/utils/hooks.ts:4091–4111

(
  agentId: string,
  agentType: string,
  signal?: AbortSignal,
  timeoutMs: number = TOOL_HOOK_EXECUTION_TIMEOUT_MS,
)

 * @returns Async generator that yields progress messages and hook results
 */
export async function* executeSubagentStartHooks(
  agentId: string,
  agentType: string,
  signal?: AbortSignal,
  timeoutMs: number = TOOL_HOOK_EXECUTION_TIMEOUT_MS,
): AsyncGenerator<AggregatedHookResult> {
  const hookInput: SubagentStartHookInput = {
    ...createBaseHookInput(undefined),
    hook_event_name: 'SubagentStart',
    agent_id: agentId,
    agent_type: agentType,
  }

  yield* executeHooks({
    hookInput,
    toolUseID: randomUUID(),
    matchQuery: agentType,
    signal,
    timeoutMs,
  })
}

/**
 * Execute pre-compact hooks if configured