Does this skill support taint analysis?

Yes, it prioritizes taint mode for data flow vulnerabilities, helping you define sources, sinks, and sanitizers to track untrusted data.

Can I use this to run existing Semgrep rulesets?

No, this skill is specifically designed for creating and optimizing new, custom rules. For running existing rulesets, you should use the standard semgrep skill.

What is the primary goal of the Semgrep Rule Creator skill?

The primary goal is to help users create production-quality Semgrep rules that are accurately tested, optimized, and free from common false positives.

Why does the skill require a test-first approach?

A test-first approach ensures that rules match intended vulnerabilities while ignoring safe code patterns, which is critical for maintaining trust in automated security tools.

How does it handle complex code structures?

The skill utilizes Semgrep's AST dump capability to see exactly how code is parsed, allowing it to create patterns that are resilient to syntactic variations.

Semgrep Rule Creator

Name: Semgrep Rule Creator
Author: trailofbits

bytrailofbits

•

938

•

Seguridad y Pruebas

Generates and optimizes production-quality Semgrep rules for advanced vulnerability detection and security auditing.

The Semgrep Rule Creator skill enables developers and security researchers to build, test, and refine custom Semgrep rules with a high degree of precision. By enforcing a strict test-first methodology and utilizing AST (Abstract Syntax Tree) analysis, this skill helps users create robust detectors for both simple bug patterns and complex data flow vulnerabilities using taint mode. It streamlines the entire development lifecycle—from initial pattern identification to final optimization—ensuring that custom rules minimize false positives while maintaining high performance across large codebases.

Características Principales

01AST-aware pattern matching to handle syntactic variations

02Iterative rule optimization to remove redundant patterns

03Advanced taint-mode configuration for data flow analysis

04938 GitHub stars

05Guided test-first development workflow for reliable rule creation

06Built-in validation for both vulnerable and safe code cases

Casos de Uso

01Developing custom security detectors for proprietary libraries and frameworks

02Enforcing strict coding standards and identifying anti-patterns during CI/CD

03Creating specialized taint-mode rules to prevent injection vulnerabilities

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add trailofbits/skills semgrep-rule-creator

For use in Claude.ai and ChatGPT

Download Skill