Method resume

packages/agent-core/src/session/index.ts:300–321

()

  }

  async resume(): Promise<{ warning?: string }> {
    await this.skillsReady;
    this.log.info('session resume', { app_version: this.options.appVersion });
    const { agents } = await this.readMetadata();
    this.agents.clear();
    // Only the main agent is needed to reopen the session; subagents replay
    // lazily when an RPC or Agent(resume=...) call asks for their state.
    const { warning } =
      agents['main'] === undefined ? { warning: undefined } : await this.resumeAgent('main');
    // A session migrated from an external tool ships a wire without the
    // `config.update` bootstrap events a natively-created agent writes, so the
    // main agent comes back with an empty system prompt and no tools. Apply the
    // default profile so the resumed session is usable. Native sessions always
    // replay a non-empty system prompt and never enter this branch.
    const main = this.getReadyAgent('main');
    const profile = DEFAULT_AGENT_PROFILES['agent'];
    if (main !== undefined && profile !== undefined && main.config.systemPrompt === '') {
      await this.bootstrapAgentProfile(main, profile);
    }
    await this.triggerSessionStart('resume');
    return { warning };
  }

  async close(): Promise<void> {
    try {