# 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.
   - `challenge-001`: October 2025
   - `challenge-002`: November 2025
   - `challenge-003`: December 2025
   - Increment for subsequent months.
- `archive`: (Optional) Use this tag when the challenge is no longer active.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.

## Example Front Matter

```yaml
---
tags:
 - challenge
 - challenge-002
---
```
