# Regular expressions (/utils--regex)

/utils--regex is a Claude Code skill in the Code section. Writes, explains and tests regular expressions in your language, with test cases and warnings about ReDoS and flavor differences.

- Web version: https://skills.sgomez.dev/en/s/utils--regex
- Section: [Code](https://skills.sgomez.dev/en/code.md)
- Author: Santiago Gómez de la Torre
- License: MIT
- Source: https://github.com/sgomez-dev/claude-skills/blob/main/skills/utils/regex.md
- Updated 26 Mar 2026

## How to ask for it

- `/utils--regex write a regex to validate email addresses`
- `/utils--regex explain what this regex I found in the code does`
- `/utils--regex test whether this regex correctly matches phone numbers`

## Install

macOS · Linux:

```
curl -fsSL https://raw.githubusercontent.com/sgomez-dev/claude-skills/main/install.sh | bash
```

Windows:

```
irm https://raw.githubusercontent.com/sgomez-dev/claude-skills/main/install.ps1 | iex
```

Claude Code plugin:

```
/plugin marketplace add sgomez-dev/claude-skills
/plugin install utility-skills@claude-skills-collection
```

## Permissions

- Reads: —
- Writes: —
- Runs: —
- Network: No
- Destructive: No

## Author's description

Generate, explain, and test regular expressions

- [How we review this](https://skills.sgomez.dev/en/methodology.md)