# GitHub Copilot Instructions

**Never use the unicode multiplication symbol (×, U+00D7) in any documentation, code, or markdown.**

Always use a plain lowercase 'x' for dimensions and multiplication.

- WRONG: `25mm × 25mm × 25mm`
- CORRECT: `25mm x 25mm x 25mm`

# Wiki Tagging Standards

All wiki pages should use YAML frontmatter for tagging.

## Challenge Tags
All challenge pages must include the following tags:
- `challenge`: Identifies the page as a challenge.
- `challenge-NNN`: A unique sequential identifier (e.g., `challenge-001`, `challenge-002`).
- `archive`: (Optional) Use this tag when the challenge is no longer active.

## Visibility Tags
- `hidden`: Use this tag to prevent the page from being published to the fargo3d.com website.