---
title: "Semgrep Custom Pattern Library"
description: "Builds custom Semgrep rules using the semgrep YAML rule syntax with metavariable-pattern, pattern-either, and taint-mode analysis. Generates rule packs for OWASP Top 10 detection across Python, JavaScript, and Go codebases."
verification: "security_reviewed"
source: "https://github.com/semgrep/semgrep"
category:
  - "Code Quality & Review"
framework:
  - "Claude Agents"
tool_ecosystem:
  github_repo: "semgrep/semgrep"
  github_stars: 14794
---

# Semgrep Custom Pattern Library

Builds custom Semgrep rules using the semgrep YAML rule syntax with metavariable-pattern, pattern-either, and taint-mode analysis. Generates rule packs for OWASP Top 10 detection across Python, JavaScript, and Go codebases.

## Installation

Choose whichever fits your setup:

1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/semgrep-custom-pattern-library/)