linshenkx/prompt-optimizer · error · VariableValueGenerationExecutionError

Template "${templateId}" not found or empty.

Error message

Template "${templateId}" not found or empty.

What it means

The value-generation service renders the built-in template with id 'variable-value-generation' from the template manager. If getTemplate returns nothing or the template has empty content, VariableValueGenerationExecutionError is thrown because the LLM prompt cannot be constructed.

Source

Thrown at packages/core/src/services/variable-value-generation/service.ts:116

   * 验证模型是否存在
   */
  private async validateModel(modelKey: string): Promise<void> {
    const model = await this.modelManager.getModel(modelKey);
    if (!model) {
      throw new VariableValueGenerationModelError(modelKey);
    }
  }

  /**
   * 获取变量值生成模板
   */
  private async getGenerationTemplate(): Promise<Template> {
    const templateId = 'variable-value-generation';

    try {
      const template = await this.templateManager.getTemplate(templateId);
      if (!template?.content) {
        throw new VariableValueGenerationExecutionError(`Template "${templateId}" not found or empty.`);
      }
      return template;
    } catch (error) {
      if (error instanceof VariableValueGenerationError) {
        throw error
      }
      if (typeof (error as any)?.code === 'string') {
        throw toErrorWithCode(error)
      }
      throw new VariableValueGenerationExecutionError(
        `Failed to get template "${templateId}": ${error instanceof Error ? error.message : String(error)}`,
      )
    }
  }

  /**
   * 构建模板上下文
   */

View on GitHub (pinned to 3e677b1d9f)

Solutions

1. Check the template manager for id 'variable-value-generation' and inspect its content
2. Restore/re-import the default template from the library's bundled defaults or reinstall/reseed templates
3. Verify the template storage path/env config used by templateManager is correct
4. If you intentionally customize it, ensure the saved content is non-empty after edits

Example fix

// before
await gen.generate(req); // throws Template "variable-value-generation" not found or empty.

// after
const t = await templateManager.getTemplate('variable-value-generation');
if (!t?.content) {
  await templateManager.saveTemplate({
    id: 'variable-value-generation',
    content: DEFAULT_GENERATION_TEMPLATE_CONTENT, // bundled default
  });
}
await gen.generate(req);

const t = await templateManager.getTemplate('variable-value-generation');
if (!t?.content?.trim()) throw new Error('generation template missing — reseed defaults');

catch (e) { if (e instanceof VariableValueGenerationExecutionError && /not found or empty/.test(e.message)) { await reseedDefaultTemplates(); return gen.generate(req); } throw e; }

When it happens

Trigger: Calling generate() when the template manager has no template named 'variable-value-generation', or the template exists but its content is '' / whitespace.

Common situations: Fresh install where the bundled template was never seeded; user edited/deleted the template in the template manager UI; template storage pointing at a stale/missing directory; template sync migration skipped in an upgrade; empty template file created by a failed write.

Related errors

• Failed to get template "${templateId}": ${error instanceof E
• error instanceof Error ? error.message : String(error)
• Prompt content must not be empty.
• Generation model key must not be empty.
• Variables list must not be empty.

AI-assisted analysis of linshenkx/prompt-optimizer@3e677b1d9f (2026-08-27). Data as JSON: /api/errors/c61f30aba30419d5. Report an issue: GitHub.