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Error Code Guide

Design consistent error codes using the PREFIX_CATEGORY_NUMBER format for applications and APIs.

70|13|Updated Dec 24, 2025
Search Tags:#debugging#error handling#api design#validation#error codes#http status
One-click install
npx skills add https://github.com/AsiaOstrich/universal-dev-standards --skill error-code-guide
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Error Code Guide
Source: https://github.com/AsiaOstrich/universal-dev-standards/tree/main/.gemini/skills/error-code-guide
Command: npx skills add https://github.com/AsiaOstrich/universal-dev-standards --skill error-code-guide

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers and teams create consistent, understandable, and machine-readable error codes, improving debugging and API design.

Core Features & Use Cases

  • Standardized Format: Enforces a PREFIX_CATEGORY_NUMBER format for error codes.
  • Category Definitions: Provides clear definitions and examples for common error categories (Validation, Business, System, Network, Auth).
  • HTTP Status Mapping: Suggests appropriate HTTP status codes for different error categories.
  • Use Case: When designing a new API endpoint, use this Skill to generate a unique and descriptive error code for a potential validation failure, ensuring it aligns with established project standards.

Quick Start

Generate an error code for an authentication validation failure.

Frequently Asked Questions about Error Code Guide

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I design consistent error codes for an API?▼

API error codes should be mapped to appropriate HTTP status codes based on their category, such as using 400 for Validation errors or 401 for Auth errors, ensuring clients receive accurate HTTP status code responses alongside the specific error code.

What is the PREFIX_CATEGORY_NUMBER format for error handling?▼

Error categories organize failures into distinct groups like Validation, Business, System, Network, and Auth, allowing teams to standardize responses and map them directly to appropriate HTTP status codes for better debugging.

How do I map error categories to HTTP status codes?▼

AI-optimized YAML formats structure error code definitions to be token-efficient, allowing language models to parse and process error handling guidelines and response structures with minimal context consumption.

Does this error code standardization support internationalization strategies?▼

Use this error code standardization when designing new API endpoints or refactoring existing applications to ensure validation failures and business logic errors align with established project standards for clarity.

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