A specialized CLI utility that generates framework-specific error handling middleware, custom error classes, and async wrappers for modern web APIs.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install error-handler
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install error-handler using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Error Handler Generator?
The Error Handler Generator is a developer-centric tool designed to eliminate the boilerplate involved in setting up production-ready error management. As a key utility within the Openclaw Skills ecosystem, it allows developers to instantly create a consistent error response architecture across various Node.js frameworks. This ensures that every API response follows a predictable shape while protecting sensitive system details from being exposed to the client.
By utilizing this skill, teams can standardize their error handling logic without manual coding, ensuring that custom classes for common scenarios like validation errors or resource-not-found exceptions are implemented correctly from day one. It bridges the gap between raw code and best-practice implementation through automated generation.
Error Handler Generator Use Cases
- Launching a new API project and requiring immediate, robust error architecture.
- Standardizing error response shapes across multiple microservices or routes.
- Migrating a legacy codebase to use proper HTTP status codes and custom error classes.
- Implementing global async wrappers to catch unhandled promise rejections automatically.
- Enhancing API security by ensuring stack traces are only visible in development environments.
How Error Handler Generator Works
- The developer invokes the generator via npx, specifying their target framework (e.g., Express, Fastify, or Next.js).
- The Openclaw Skills logic analyzes the framework's middleware signature and common patterns.
- The tool generates a set of custom error classes that inherit from the base Error object, mapped to specific HTTP status codes.
- A framework-specific middleware function is created to catch thrown errors and format them into a consistent JSON response.
- An optional async wrapper is provided to simplify error propagation in asynchronous route handlers.
- The resulting code is either output to the terminal or saved directly to a specified directory for immediate use.
Error Handler Generator Setup
To use this tool within the Openclaw Skills framework, ensure you have Node.js 18+ installed. You must provide an OpenAI API key via environment variables to power the generation logic.
export OPENAI_API_KEY='your_api_key_here'
npx ai-error-handler <framework>
Error Handler Generator Data Schema & Taxonomy
The generator produces a structured set of files or code blocks that follow this organizational schema:
| Component | Purpose |
|---|---|
| Custom Error Classes | Defines specialized classes like NotFoundError, UnauthorizedError, and ValidationError. |
| API Error Middleware | The central function that catches errors and sends the formatted JSON response. |
| Async Handler | A utility to wrap asynchronous functions to ensure errors reach the middleware. |
| Response Shape | A standardized JSON object containing the status code, message, and optional error code. |
Error Handler Generator Advanced Features
- Support for multiple major frameworks including Express, Fastify, Koa, and Next.js API routes.
- Language flexibility allowing for the generation of both clean JavaScript and type-safe TypeScript code.
- Output path customization using the
-oflag to integrate directly into existing project structures. - Intelligent environment detection to automatically hide stack traces in production builds.
- Zero-config operation as part of the broader Openclaw Skills suite of developer tools.
SKILL.md
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