Method instantiateAgent

packages/agent-core/src/session/index.ts:795–836

(
    id: string,
    homedir: string,
    type: AgentType,
    config: Partial<AgentOptions> = {},
    parentAgentId: string | null = null,
  )

  }

  private instantiateAgent(
    id: string,
    homedir: string,
    type: AgentType,
    config: Partial<AgentOptions> = {},
    parentAgentId: string | null = null,
  ): Agent {
    const parentAgent = parentAgentId !== null ? this.getReadyAgent(parentAgentId) : undefined;
    const cwd = parentAgent?.config.cwd ?? this.toolKaos.getcwd();
    let agent!: Agent;
    agent = new Agent({
      ...config,
      type,
      kaos: this.toolKaos.withCwd(cwd),
      toolServices: this.options.toolServices,
      config: this.options.config,
      homedir,
      // Session-level, shared across agents: originals persisted for
      // compression captions live with the session, not the agent.
      mediaOriginalsDir: sessionMediaOriginalsDir(this.options.homedir),
      skills: this.skills,
      rpc: proxyWithExtraPayload(this.rpc, { agentId: id }),
      modelProvider: this.options.providerManager,
      hookEngine: config.hookEngine ?? this.hookEngine,
      subagentHost: config.subagentHost ?? new SessionSubagentHost(this, id),
      mcp: this.mcp,
      permission: this.permissionOptions(parentAgentId, config.permission),
      telemetry: this.telemetry,
      log: this.log.createChild({ agentId: id }),
      pluginSessionStarts: type === 'main' ? this.options.pluginSessionStarts : undefined,
      pluginCommands: type === 'main' ? this.options.pluginCommands : undefined,
      experimentalFlags: this.experimentalFlags,
      additionalDirs: parentAgent?.getAdditionalDirs() ?? this.additionalDirs,
      systemPromptContextProvider: () =>
        prepareSystemPromptContext(
          this.systemContextKaos(agent.kaos.getcwd()),
          this.options.kimiHomeDir,
          { additionalDirs: agent.getAdditionalDirs() },
        ),
    });
    return agent;
  }

  private permissionOptions(
    parentAgentId: string | null,