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0xMerl99
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regex-expert

Craft, debug, and explain regular expressions across PCRE, JavaScript, Python, Rust, and Go.

1|Updated Mar 2, 2026
Search Tags:#developer tools#debugging#text processing#pattern matching#regex#regular expressions
One-click install
npx skills add https://github.com/0xMerl99/FangAI --skill regex-expert
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: regex-expert
Source: https://github.com/0xMerl99/FangAI/tree/main/crates/openfang-skills/bundled/regex-expert
Command: npx skills add https://github.com/0xMerl99/FangAI --skill regex-expert

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill simplifies the complex task of creating, debugging, and understanding regular expressions, making them accessible and effective for various programming needs.

Core Features & Use Cases

  • Pattern Crafting: Assists in building precise regex patterns for diverse data matching needs.
  • Debugging & Explanation: Helps identify errors in existing patterns and provides clear, plain-English explanations.
  • Cross-Flavor Support: Offers guidance across multiple regex engines like PCRE, JavaScript, Python, Rust, and Go.
  • Use Case: You need to extract all email addresses from a large text file but are unsure of the correct regex pattern. This Skill can generate a robust pattern, explain its components, and help you test it.

Quick Start

Craft a regular expression to find all valid email addresses in a given text.

Frequently Asked Questions about regex-expert

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write a regular expression to extract email addresses from text?▼

You can craft a precise regular expression for extracting emails by defining a pattern that matches the standard structure of an email address. This Skill helps build robust patterns, explains their components clearly, and assists with testing for accurate text processing.

Why does my regex pattern fail to match across different engines?▼

Regex patterns can fail across different engines due to syntax variations between flavors like PCRE, JavaScript, Python, Rust, and Go. This Skill provides cross-flavor support to debug existing patterns and identify engine-specific errors for deterministic pattern matching.

What is the best way to debug complex regular expressions?▼

The best way to debug complex regular expressions is to break them down and analyze their individual components. This Skill helps identify errors in existing patterns and provides clear, plain-English explanations to clarify how the matching logic operates.

Does this regex pattern work with Python and JavaScript?▼

Regex patterns may behave differently in Python and JavaScript due to engine variations. This Skill offers cross-flavor guidance across PCRE, JavaScript, Python, Rust, and Go to ensure your pattern is compatible and optimized for your specific environment.

How can I optimize a regular expression for large text processing?▼

To optimize a regular expression for large text processing, you must ensure the pattern is deterministic and avoids unnecessary backtracking. This Skill focuses on clarity and optimization to help you build efficient patterns for data validation tasks.

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