Error Messages

SkillCommunication

Expert skill for designing and implementing high-quality compiler error messages

Use Error Messages in Claude, ChatGPT or Ahel Desktop

Free. Sign in, add Error Messages and connect your AI. About a minute.

Claude ChatGPT Ahel Desktop

Also: Claude Code · Cursor · Codex

Then ask your AI: use the Error Messages skill

Details

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

Account requirements not reviewed. Check the skill instructions before use; ahel provides instructions and does not run this skill.

No other account needed.

Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Error MessagesStart free

What this skill tells your AI

The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/programming-languages/skills/error-messages/SKILL.md and read by ahel’s review.

Overview

Expert skill for designing and implementing high-quality compiler error messages.

Capabilities

Design clear, actionable error message templates
Implement source context display with underlines
Generate fix suggestions and quick fixes
Handle error cascades and suppression
Implement multi-span error annotations
Support machine-readable error output (JSON)
Implement color/styled terminal output
Design error recovery strategies for better diagnostics

Target Processes

error-message-enhancement.js
parser-development.js
type-system-implementation.js
semantic-analysis.js
lsp-server-implementation.js

Dependencies

Elm/Rust error message guidelines

Usage Guidelines

Clarity: Make error messages clear and actionable
Context: Show relevant source code context with precise location
Suggestions: Provide fix suggestions when possible
Cascades: Suppress cascading errors to avoid overwhelming users
Machine-Readable: Support JSON output for tooling integration

Output Schema

{
  "type": "object",
  "properties": {
    "errorFormat": {
      "type": "string",
      "enum": ["human", "json", "sarif"]
    },
    "features": {
      "type": "array",
      "items": { "type": "string" }
    },
    "colorSupport": { "type": "boolean" },
    "generatedFiles": {
      "type": "array",
      "items": { "type": "string" }
    }
  }
}

Signals

GitHub stars: 2k
Forks: 112
Last commit: Sep 2026

Advanced

Item type: skill
Key: error-messages
Source: github.com/a5c-ai/babysitter

github.com/a5c-ai/babysitter