Error Messages

SkillCommunication

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

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Then ask your AI: use the Error Messages skill

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