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Error Handler Generator (Grade A) logo

Error Handler Generator (Grade A)Security-tested development skill for Claude AI. Grade A. Generate typed error classes, error handling middleware, and HTTP error mapping following project conventions. Use when the user asks to set u

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Daniel NikulshynReviewed by Daniel Nikulshyn·Updated July 2026

Overview

Error Handler Generator (Grade A) is a security-tested development skill for Claude AI. It generates typed error classes, error handling middleware, and HTTP error mapping following project conventions. The skill is triggered when the user asks to set up error handling, create error classes, or implement error middleware. It involves defining an error hierarchy, creating specific error classes, and setting up error middleware. The error hierarchy is defined by extending the base AppError class, which includes properties such as statusCode, code, and details. Specific error classes, such as ValidationError, AuthenticationError, and NotFoundError, are created by extending the AppError class and adding specific details and error codes. Error middleware is created to handle and map HTTP errors, and is typically used in conjunction with the error classes. The skill follows project conventions and is compatible with various frameworks, including Express, Fastify, and Koa.

Key features

  • Generate typed error classes
  • Create error handling middleware
  • Map HTTP errors following project conventions

Pricing

Model
Free
Category
Skills
Rating
No reviews yet

Use cases

Setting up error handling for a new project

Use the Error Handler Generator to create a comprehensive error handling system with typed error classes and centralized middleware.

Implementing error middleware for an existing project

Trigger the skill to generate error handling middleware and HTTP error mapping following project conventions.

Standardizing error responses across an API

Utilize the Error Handler Generator to create consistent API error responses and typed error classes.

Pros & Cons

Pros

  • Streamlines error handling setup
  • Provides standardized error classes and responses
  • Supports various frameworks like Express, Fastify, and Koa

Cons

  • Requires framework and response envelope format to be identified
  • May need customization for specific project requirements

Reviews

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Q&A

What are the limitations?

The tool requires the framework and response envelope format to be identified and may need customization for specific project requirements.

Asked by Jovana Petrovic · Mar 6, 2026

What frameworks are supported?

The tool supports various frameworks like Express, Fastify, and Koa.

Asked by Mia Andersen · Jan 28, 2026

What are the key features?

The key features include generating typed error classes, creating error handling middleware, and mapping HTTP errors following project conventions.

Asked by Celeste Marchetti · Nov 28, 2025

What does the tool generate?

The Error Handler Generator (Grade A) generates typed error classes, error handling middleware, and HTTP error mapping following project conventions.

Asked by Fumiko Sato · Nov 25, 2025

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