error-handler-gen

What This Skill Does

The error-handler-gen skill is a specialized developer utility designed to automate the creation of robust, standardized error-handling infrastructure in modern web backends. Rather than manually writing repetitive try-catch blocks and error middleware, this tool generates production-ready code tailored to your specific framework. It provides custom error classes (such as NotFoundError and ValidationError), ensures consistent JSON response shapes, implements async wrappers for promise rejections, and handles HTTP status code assignment automatically. By leveraging this skill, developers ensure that their API responses are predictable and that stack traces are properly masked in production environments while being logged appropriately server-side.

Installation

To integrate this skill into your environment, use the OpenClaw management command: clawhub install openclaw/skills/skills/lxgicstudios/error-handler

Once installed, you can invoke the tool directly via npx. Note that the generator requires Node.js 18+ and an active OPENAI_API_KEY environment variable to power its generation logic.

Use Cases

This skill is indispensable for:

• Initial project scaffolding: Quickly setting up global error handling on day one.
• Refactoring legacy code: Replacing inconsistent, messy error responses with a unified, professional interface.
• Standardization: Ensuring that all services within a microservices architecture communicate errors in the exact same format.
• Rapid Prototyping: Automating boilerplate so you can focus on core business logic.

Example Prompts

1. "Generate a complete error handling setup for an Express application using TypeScript that includes custom error classes and a centralized middleware function."
2. "I need to implement error handling for a Fastify API; can you use the error-handler-gen skill to create the necessary files in JavaScript?"
3. "Set up global error handling for my Next.js API routes that correctly maps custom errors to appropriate HTTP status codes."

Tips & Limitations

• Tip: Always ensure your production environment has the proper logging middleware connected to the generated error handler to capture telemetry.
• Tip: Use the -o flag to specify your preferred output directory to maintain a clean project structure.
• Limitation: While the tool generates high-quality boilerplate, it cannot automatically determine custom business logic requirements for domain-specific errors. You should manually extend the generated error classes if you need to pass specific metadata or dynamic payloads to your frontend clients.