semgrep-rule-variant-creator

Port Semgrep rules to target languages with applicability checks and generated tests.

Updated Jun 9, 2026

Search Tags:#code analysis #vulnerability detection #semgrep #language translation #rule porting

Ready to run

npx skills add https://github.com/iiammae/opero --skill semgrep-rule-variant-creator-iiammae

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: semgrep-rule-variant-creator
Source: https://github.com/iiammae/opero/tree/main/.agents/skills/semgrep-rule-variant-creator
Command: npx skills add https://github.com/iiammae/opero --skill semgrep-rule-variant-creator-iiammae

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires semgrep, and includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill streamlines the process of porting existing Semgrep rules to different languages, eliminating the need for manual analysis and rule creation.

Core Features & Use Cases

Language Variant Creation: Converts Semgrep rules for use in specific languages.
Applicability Analysis: Determines if the rule is applicable to the target language.
Test Creation: Generates test cases to ensure rule effectiveness.
Use Case: If you have a rule for a certain vulnerability and need to extend it to, say, Go and Java, this skill automates much of the process.

Quick Start

Create language-specific Semgrep rules from the provided rule for Python and Java.

Frequently Asked Questions about semgrep-rule-variant-creator

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

FAQPage Schema

How do I port a Semgrep rule to a different programming language?▼

To port a Semgrep rule, you translate the existing syntax to match the target language's structure. This process determines rule applicability, generates test cases, and creates translated variants for multi-language vulnerability detection.

Can Semgrep rules detect vulnerabilities across multiple languages automatically?▼

Semgrep rules can detect vulnerabilities across multiple languages by translating existing rule logic. The automation process analyzes applicability to the target language and generates corresponding test cases to ensure accurate code analysis.

What is the best way to translate Python Semgrep rules for Go and Java?▼

The best way to translate Semgrep rules for Go and Java is through automated rule porting. This analyzes the original rule's applicability to the target languages and generates specific test cases to validate the translated vulnerability detection logic.

Do I need to manually create test cases when converting Semgrep rules?▼

You do not need to manually create test cases when converting Semgrep rules. The automated translation process generates test cases as part of the language variant creation to verify that the ported rules function effectively.

Does Semgrep rule porting work for any target programming language?▼

Semgrep rule porting works by first determining applicability to the target language. If the rule's core vulnerability detection logic is structurally compatible with the target language, the translation and test generation process proceeds successfully.

Are there limitations when porting Semgrep rules for multi-language code analysis?▼

Limitations in porting Semgrep rules arise when the original rule's syntax or vulnerability pattern lacks a direct structural equivalent in the target language. The applicability analysis identifies these constraints before attempting any rule translation.