Error Message Style Guide

This guide establishes the standard format for validation error messages in the gh-aw codebase. All validation errors should be clear, actionable, and include examples.

Error Message Template

[what's wrong]. [what's expected]. [example of correct usage]

Each error message should answer three questions:

1. What's wrong? - Clearly state the validation error
2. What's expected? - Explain the valid format or values
3. How to fix it? - Provide a concrete example of correct usage

Good Examples

These examples follow the template and provide actionable guidance: