error-handler-gen

What This Skill Does

The error-handler-gen skill is a specialized developer tool designed to automate the creation of robust, standardized error-handling infrastructure in backend applications. Instead of manually writing repetitive try-catch blocks and error classes, this tool generates tailored middleware, custom error types (such as NotFoundError, ValidationError, and AuthorizationError), and asynchronous request wrappers. It ensures that your API responses follow a consistent schema, prevents the accidental leaking of sensitive stack traces in production environments, and simplifies the integration of centralized logging. By abstracting away the boilerplate of error management, it allows developers to focus on business logic while maintaining high standards for API reliability.

Installation

To install this skill for use within your OpenClaw agent environment, execute the following command in your terminal:

clawhub install openclaw/skills/skills/lxgicstudios/error-handler-gen

Once installed, the agent gains the capability to execute the error-handler-gen tool using the npx environment. No additional global installations are required, though Node.js 18 or higher is recommended for optimal compatibility.

Use Cases

This skill is indispensable in several scenarios:

1. Scaffolding new backend projects: Quickly set up a production-ready error response pipeline on day one.
2. Refactoring legacy codebases: Standardize messy, fragmented error-handling logic into a single, maintainable middleware layer.
3. Scaling API teams: Ensure that every developer on the team returns the same error shape, making frontend consumption easier and more predictable.
4. Implementing monitoring: Centralize all error catching so you can easily pipe errors to external logging services like Sentry or Datadog.

Example Prompts

1. "Generate a standardized error handling middleware for my new Express.js project, including custom classes for 400, 401, and 404 errors."
2. "I am building a Fastify application using JavaScript. Please create an error-handling setup that includes an async wrapper to catch promise rejections and formats responses consistently."
3. "Set up error handling for my Next.js API routes; make sure the output file is created in the lib directory and follows TypeScript best practices."

Tips & Limitations

To maximize the effectiveness of this skill, ensure that your OPENAI_API_KEY is correctly set in your environment variables, as the generation engine relies on language model processing. While the tool produces excellent boilerplate, always review the generated middleware to ensure it aligns with your specific logging strategy. Remember to toggle your error logging verbosity based on the environment; use the tool's built-in logic to ensure stack traces are hidden from end-users in production while remaining visible during your local development process.