error-handling

Implement Go error handling patterns with context wrapping and sentinel errors.

1|Updated Mar 5, 2026
One-click install
npx skills add https://github.com/baphled/dotopencode --skill error-handling-baphled
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: error-handling
Source: https://github.com/baphled/dotopencode/tree/main/skills/error-handling
Command: npx skills add https://github.com/baphled/dotopencode --skill error-handling-baphled

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses the challenge of managing and propagating errors effectively in software development, ensuring applications are more stable and maintainable.

Core Features & Use Cases

  • Error Wrapping: Adds context to errors without losing the original cause.
  • Sentinel Errors: Defines specific error values for predictable error conditions.
  • Custom Error Types: Allows for structured error data when more detail is needed.
  • Panic/Recover Boundaries: Manages unexpected panics at defined points, typically API edges.
  • Use Case: When a database operation fails, this skill helps wrap the original database error with information about the specific service operation that triggered it, making debugging much easier.

Quick Start

Use the error-handling skill to explain the difference between errors.Is and errors.As.

Frequently Asked Questions about error-handling

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

FAQPage Schema
How do I implement robust error handling patterns in Go?

Implement robust error handling by using error wrapping to add context, defining sentinel errors for predictable conditions, and creating custom error types for structured data. This ensures clear propagation and stable application behavior.

What is the difference between errors.Is and errors.As in Go?

errors.Is checks if an error matches a specific sentinel value, while errors.As extracts and casts an error into a custom error type. Both navigate wrapped error chains to identify underlying causes.

How do I add context to a database error without losing the original cause?

Add context to a database error by using error wrapping techniques, which annotate the original failure with service operation details while preserving the underlying cause for easier debugging.

When should I use panic and recover boundaries in my application?

Use panic and recover boundaries at defined points like API edges to manage unexpected panics. This prevents application crashes and maintains resilience during unpredictable runtime failures.

Are these error handling patterns language-agnostic or specific to Go?

The strategies are language-agnostic concepts applicable to software development generally, but they provide a primary focus on Go idioms and specific built-in error mechanisms.

What is a sentinel error and when do I need it?

A sentinel error is a predefined error value used for predictable error conditions. You need it when you must check if a specific failure occurred, such as a record not found.