Function subagentTool

extensions/cli/src/tools/subagent.ts:15–115

()

import { Tool } from "./types.js";

export const subagentTool = async (): Promise<Tool> => {
  const modelServiceState = await serviceContainer.get<ModelServiceState>(
    SERVICE_NAMES.MODEL,
  );

  return {
    ...SUBAGENT_TOOL_META,

    description: generateSubagentToolDescription(modelServiceState),

    parameters: {
      ...SUBAGENT_TOOL_META.parameters,
      properties: {
        ...SUBAGENT_TOOL_META.parameters.properties,
        subagent_name: {
          type: "string",
          description: `The type of specialized agent to use for this task. Available agents: ${
            modelServiceState
              ? getSubagentNames(modelServiceState).join(", ")
              : ""
          }`,
        },
      },
    },

    preprocess: async (args: any) => {
      const { description, subagent_name } = args;

      const agent = getSubagent(modelServiceState, subagent_name);
      if (!agent) {
        throw new Error(
          `Unknown agent type: ${subagent_name}. Available agents: ${getSubagentNames(
            modelServiceState,
          ).join(", ")}`,
        );
      }

      return {
        args,
        preview: [
          {
            type: "text",
            content: `Spawning ${agent.model.name} to: ${description}`,
          },
        ],
      };
    },

    run: async (args: any, context?: { toolCallId: string }) => {
      const { prompt, subagent_name } = args;

      logger.debug("subagent args", { args, context });

      // get agent configuration
      const agent = getSubagent(modelServiceState, subagent_name);
      if (!agent) {
        throw new Error(`Unknown agent type: ${subagent_name}`);
      }