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skill-isolation-tester

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Use PROACTIVELY when validating Claude Code skills before sharing or public release. Automated testing framework using multiple isolation environments (git worktree, Docker containers, VMs) to catch environment-specific bugs, hidden dependencies, and cleanup issues. Includes production-ready test templates and risk-based mode auto-detection. Not for functional testing of skill logic or non-skill code.

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Marketplace

claudex

cskiro/claudex

Plugin

skill-isolation-tester

Repository

cskiro/claudex
1stars

plugins/skill-isolation-tester/skills/skill-isolation-tester/SKILL.md

Last Verified

January 25, 2026

Install Skill

Select agents to install to:

Scope:
npx add-skill https://github.com/cskiro/claudex/blob/main/plugins/skill-isolation-tester/skills/skill-isolation-tester/SKILL.md -a claude-code --skill skill-isolation-tester

Installation paths:

Claude
.claude/skills/skill-isolation-tester/
Powered by add-skill CLI

Instructions

# Skill Isolation Tester

Tests Claude Code skills in isolated environments to ensure they work correctly without dependencies on your local setup.

## When to Use

**Trigger Phrases**:
- "test skill [name] in isolation"
- "validate skill [name] in clean environment"
- "test my new skill in worktree/docker/vm"
- "check if skill [name] has hidden dependencies"

**Use Cases**:
- Test before committing or sharing publicly
- Validate no hidden dependencies on local environment
- Verify cleanup behavior (no leftover files/processes)
- Catch environment-specific bugs

## Quick Decision Matrix

| Request | Mode | Isolation Level |
|---------|------|-----------------|
| "test in worktree" | Git Worktree | Fast, lightweight |
| "test in docker" | Docker | Full OS isolation |
| "test in vm" | VM | Complete isolation |
| "test skill X" (unspecified) | Auto-detect | Based on skill risk |

## Risk-Based Auto-Detection

| Risk Level | Criteria | Recommended Mode |
|------------|----------|------------------|
| Low | Read-only, no system commands | Git Worktree |
| Medium | File creation, bash commands | Docker |
| High | System config changes, VM ops | VM |

## Mode 1: Git Worktree (Fast)

**Best for**: Low-risk skills, quick iteration

**Process**:
1. Create isolated git worktree
2. Install Claude Code
3. Copy skill and run tests
4. Cleanup

**Workflow**: `modes/mode1-git-worktree.md`

## Mode 2: Docker Container (Balanced)

**Best for**: Medium-risk skills, full OS isolation

**Process**:
1. Build/pull Docker image
2. Create container with Claude Code
3. Run skill tests with monitoring
4. Cleanup container and images

**Workflow**: `modes/mode2-docker.md`

## Mode 3: VM (Safest)

**Best for**: High-risk skills, untrusted code

**Process**:
1. Provision VM, take snapshot
2. Install Claude Code
3. Run tests with full monitoring
4. Rollback or cleanup

**Workflow**: `modes/mode3-vm.md`

## Test Templates

Production-ready templates in `test-templates/`:

| Template | Use For |
|--

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