Method getPresetParamNames

src/node/services/coderService.ts:675–711

* Get parameter names covered by a preset. * Returns empty set if preset not found (allows creation to proceed without preset params).

(
    templateName: string,
    presetName: string,
    org?: string,
    signal?: AbortSignal
  )

   * Returns empty set if preset not found (allows creation to proceed without preset params).
   */
  private async getPresetParamNames(
    templateName: string,
    presetName: string,
    org?: string,
    signal?: AbortSignal
  ): Promise<Set<string>> {
    try {
      const args = ["templates", "presets", "list", templateName, "--output=json"];
      if (org) args.push("--org", org);
      const stdout = await this.runCoderJsonCommand(args, { signal });

      // Same non-JSON guard as listPresets (CLI prints info message for no presets)
      if (!stdout.trim() || !stdout.trimStart().startsWith("[")) {
        return new Set();
      }

      const raw = JSON.parse(stdout) as Array<{
        TemplatePreset: {
          Name: string;
          Parameters?: Array<{ Name: string }>;
        };
      }>;

      const preset = raw.find((p) => p.TemplatePreset.Name === presetName);
      if (!preset?.TemplatePreset.Parameters) {
        return new Set();
      }

      return new Set(preset.TemplatePreset.Parameters.map((p) => p.Name));
    } catch (error) {
      if (signal?.aborted) {
        throw error;
      }
      log.debug("Failed to get preset param names", { templateName, presetName, error });
      return new Set();
    }
  }

  /**
   * Parse rich parameter data from the Coder API.