What is the benefit of testing in a Git Worktree?

It is a lightweight, fast method to test low-risk skills in a separate file structure without the overhead of a full container or virtual machine.

How does the risk-based auto-detection feature work?

It analyzes the skill's capabilities and commands—such as whether it is read-only or requires system permissions—to recommend the most efficient isolation level.

When should I choose VM isolation over Docker?

Choose VM isolation for high-risk skills that perform system configuration changes or deep OS-level operations that require complete kernel isolation.

Does this skill perform functional testing of the skill logic?

No, it focuses on environment compatibility, portability, and side effects rather than the internal functional logic or business rules of the skill.

Skill Isolation Tester

Name: Skill Isolation Tester
Author: cskiro

bycskiro

•

Security & Testing

Validates Claude Code skills in isolated environments to identify hidden dependencies and environment-specific bugs before public release.

Skill Isolation Tester provides a robust framework for developers to proactively test their Claude Code skills across three distinct levels of isolation: Git worktrees for fast iteration, Docker containers for full OS isolation, and Virtual Machines for high-risk system modifications. By automating the setup and cleanup process, it ensures that skills remain portable and leak-proof without requiring manual environment configuration. It includes risk-based mode auto-detection, production-ready test templates, and detailed side-effect reporting, making it an essential tool for maintaining high quality and reliability in skill development.

Key Features

012 GitHub stars

02Automated multi-level isolation including Git Worktree, Docker, and Virtual Machines

03Production-ready test templates for APIs, file manipulation, and Git operations

04Risk-based environment auto-detection for optimal testing speed and safety

05Comprehensive side-effect monitoring to detect orphaned processes or uncleaned files

06Detailed validation reports featuring dependency analysis and overall readiness grades

Use Cases

01Debugging environment-specific crashes that occur on other machines but not on your local setup

02Ensuring automated cleanup routines work correctly to prevent system clutter during skill execution

03Validating a new skill's portability before sharing it with the community or publishing to a repository

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add cskiro/claudex skill-isolation-tester

For use in Claude.ai and ChatGPT

Download Skill