Function buildAgentSystemMessage

extensions/cli/src/subagent/executor.ts:34–52

* Build system message for the agent

(
  agent: ModelServiceState,
  services: any,
)

 * Build system message for the agent
 */
async function buildAgentSystemMessage(
  agent: ModelServiceState,
  services: any,
): Promise<string> {
  const baseMessage = services.systemMessage
    ? await services.systemMessage.getSystemMessage(
        services.toolPermissions.getState().currentMode,
      )
    : "";

  const agentPrompt = agent.model?.chatOptions?.baseSystemMessage || "";

  // Combine base system message with agent-specific prompt
  if (agentPrompt) {
    return `${baseMessage}\n\n${agentPrompt}`;
  }

  return baseMessage;
}

/**
 * Execute a subagent in a child session