How do I install the Error Handler Gen skill?

Run npx skillmds@latest add demerzels-lab/error-handler-gen in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Error Handler Gen skill do?

Generate error handling middleware for any framework. Use when setting up API error handling. It is listed under Integrations & APIs on SkillMD.

Is Error Handler Gen safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Error Handler Gen?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Error Handler Gen free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Error Handler Gen?

Demerzels-lab (@demerzels-lab) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Error Handler Gen by demerzels-lab — Agent Skill

Name: Error Handler Gen
Author: Demerzels-lab

File contents

Error Handler Generator

Good error handling means custom error classes, proper status codes, and consistent response shapes. This tool generates all of it for your framework.

One command. Zero config. Just works.

Quick Start

npx ai-error-handler express

What It Does

Generates error middleware for your framework
Creates custom error classes (NotFoundError, ValidationError, etc.)
Includes async wrapper to catch promise rejections
Sets up proper HTTP status codes

Usage Examples

# Express middleware
npx ai-error-handler express

# Fastify in JavaScript
npx ai-error-handler fastify -l javascript

# Next.js API routes
npx ai-error-handler nextjs -o lib/errors.ts

# Koa
npx ai-error-handler koa

Best Practices

Don't leak stack traces - only show them in development
Log errors server-side - you need them for debugging
Use error codes - clients can handle specific codes
Be consistent - same error shape everywhere

When to Use This

Starting a new API project
Standardizing error handling across routes
Adding proper error responses to a messy codebase
Setting up error monitoring

Part of the LXGIC Dev Toolkit

This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.

Find more:

GitHub: https://github.com/LXGIC-Studios
Twitter: https://x.com/lxgicstudios
Substack: https://lxgicstudios.substack.com
Website: https://lxgicstudios.com

Requirements

No install needed. Just run with npx. Node.js 18+ recommended. Needs OPENAI_API_KEY environment variable.

npx ai-error-handler --help

How It Works

Generates framework-specific error handling code including custom error classes, middleware, and async wrappers. The output follows best practices for each framework.

License

MIT. Free forever. Use it however you want.

---name: error-handler-gendescription: Generate error handling middleware for any framework. Use when setting up API error handling.---# Error Handler GeneratorGood error handling means custom error classes, proper status codes, and consistent response shapes. This tool generates all of it for your framework.**One command. Zero config. Just works.**## Quick Start```bashnpx ai-error-handler express```## What It Does- Generates error middleware for your framework- Creates custom error classes (NotFoundError, ValidationError, etc.)- Includes async wrapper to catch promise rejections- Sets up proper HTTP status codes## Usage Examples```bash# Express middlewarenpx ai-error-handler express# Fastify in JavaScriptnpx ai-error-handler fastify -l javascript# Next.js API routesnpx ai-error-handler nextjs -o lib/errors.ts# Koanpx ai-error-handler koa```## Best Practices- **Don't leak stack traces** - only show them in development- **Log errors server-side** - you need them for debugging- **Use error codes** - clients can handle specific codes- **Be consistent** - same error shape everywhere## When to Use This- Starting a new API project- Standardizing error handling across routes- Adding proper error responses to a messy codebase- Setting up error monitoring## Part of the LXGIC Dev ToolkitThis is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.**Find more:**- GitHub: https://github.com/LXGIC-Studios- Twitter: https://x.com/lxgicstudios- Substack: https://lxgicstudios.substack.com- Website: https://lxgicstudios.com## RequirementsNo install needed. Just run with npx. Node.js 18+ recommended. Needs OPENAI_API_KEY environment variable.```bashnpx ai-error-handler --help```## How It WorksGenerates framework-specific error handling code including custom error classes, middleware, and async wrappers. The output follows best practices for each framework.## LicenseMIT. Free forever. Use it however you want.

Frequently asked questions

Error Handler Gen