Regex Pattern Validator

    2

    Expert regex architect for building, auditing, and optimizing high-performance, ReDoS-safe patterns.

    Free

    0 installsSecurity scanned

    Works with the AI tools you already use

    Claude CodeClaude CodeCursorCursorCodex CLICodex CLIGitHub CopilotGitHub CopilotGemini CLIGemini CLI+20 more

    regex-pattern-validator

    Example session with this skill installed

    Create a regex pattern for a product code that starts with three lowercase letters, a hyphen, and four digits. Include named groups for id and val and check for ReDoS.

    • Read your context and instructions
    • Compiled the regex-pattern-validator
    **Pattern:** ^(?P[a-z]{3})-(?P\d{4})$ **Rating:** SAFE (No nested quantifiers) **Compatibility:** PCRE, Python, Go (Named group syntax differs in JS) **Tests** | Input | Expected | Status | |---|---|---| | abc-1234 | Match | PASS | | ab-123 | No Match | PASS |

    Connects securely to your tools. The creator never sees your data.

    About this skill

    What it does

    The Regex Pattern Validator is a specialized skill for developing, testing, and auditing regular expressions across multiple programming languages. It goes beyond simple string matching by providing deep performance analysis, ReDoS (Regular Expression Denial of Service) protection, and engine-specific compatibility checks.

    Why use this skill

    Writing regex is easy; writing safe, performant, and cross-platform regex is hard. This skill prevents production outages caused by catastrophic backtracking and ensures your patterns work identically in JavaScript, Python, Go, Java, and PCRE. It automates the tedious process of generating comprehensive test tables for happy paths, boundary cases, and malicious inputs.

    Supported Engines & Tools

    • Flavors: Full support for PCRE, JavaScript (ES6+), Python (re/regex), Go (regexp), and Java patterns.
    • Security: Built-in auditing for ReDoS vulnerabilities like nested quantifiers and ambiguous alternations.
    • Codebase Integration: Can scan your entire repository to find and audit existing regex patterns for risks.
    • Library: Access to 30+ production-ready patterns for emails, URLs, semver, and more.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

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    2. 2

      Unzip into your skills folder

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    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

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    Security scanned

    Verified clean 3 months ago

    • Free to download with an account

    Listed3 months ago
    Updated28 days ago

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