Method resolveCurrentModelId

packages/acp-adapter/src/server.ts:787–824

* Compute the `currentValue` for the `model` config option when the * caller (either `newSession` or `loadSession`'s fallback path) does * not have a more specific signal. Prefers the harness's configured * `defaultModel`; otherwise falls back to the first listed catalog * alias so the d

()

   * `default_model = ...` sees a breadcrumb in the agent log.
   */
  private async resolveCurrentModelId(): Promise<string> {
    // Minimal-stub harnesses (no `getConfig`) skip the catalog entirely
    // and return the empty string silently. The old code path was the
    // same — `listAvailableModels` used to live behind a
    // `typeof harness.listAvailableModels === 'function'` guard, and we
    // preserve that ergonomic so adapter unit tests with bare-bones
    // stubs don't fire spurious "no models" warnings.
    if (typeof this.harness.getConfig !== 'function') return '';
    try {
      const config = await this.harness.getConfig();
      const declared = config.defaultModel;
      if (typeof declared === 'string' && declared.length > 0) {
        return declared;
      }
    } catch (err) {
      log.warn('acp: harness.getConfig threw during configOptions assembly; falling back', {
        error: err instanceof Error ? err.message : String(err),
      });
      return '';
    }
    try {
      const models = await listModelsFromHarness(this.harness);
      if (models.length === 0) {
        log.warn('acp: harness exposes no models; configOptions will ship an empty model picker');
        return '';
      }
      log.warn(
        'acp: harness has no defaultModel; falling back to first catalog entry for configOptions.currentValue',
        { fallbackModelId: models[0]!.id },
      );
      return models[0]!.id;
    } catch (err) {
      log.warn('acp: listModelsFromHarness threw during configOptions assembly', {
        error: err instanceof Error ? err.message : String(err),
      });
    }
    return '';
  }

  /**
   * Compute the initial value for the `thinking` toggle when