Effect Regex

What problem does it solve?

This Skill helps developers quickly design, test, optimize, and explain regex patterns using a deterministic, AST-based approach. It reduces debugging time, increases correctness across multiple dialects, and automates repetitive regex tasks.

Core Features & Use Cases

• Pattern Building: Generate robust patterns from natural language descriptions with multi-dialect support (JS, RE2, PCRE).
• Pattern Testing: Validate patterns against positive/negative test cases with timeout protection.
• Pattern Optimization: Apply 4 AST transformation passes to reduce complexity and improve performance.
• Pattern Explanation: Produce human-readable explanations that help non-technical stakeholders understand regex logic.
• CLI Integration: Parse CLI command structures and create semantic capture maps for tooling and parsers.
• AI-assisted Generation: Generate AI-driven patterns from examples with optional Claude integration.
• Dialect Conversion: Convert patterns between JavaScript, RE2, and PCRE dialects.

Quick Start

Ask Claude to create a regex for validating email addresses, then test and refine the pattern in the same session:

• Example prompt: "Create a regex to validate email addresses and test it against these examples: user@example.com, user@domain, user@domain.co.uk"