safety-net

Write characterization tests to lock down current code behavior before refactoring.

Updated Jun 22, 2026
One-click install
npx skills add https://github.com/skylarsabo/code-ops --skill safety-net-skylarsabo
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: safety-net
Source: https://github.com/skylarsabo/code-ops/tree/main/plugins/rigor/skills/safety-net
Command: npx skills add https://github.com/skylarsabo/code-ops --skill safety-net-skylarsabo

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill ensures your code changes do not inadvertently alter the behavior of your application by characterizing current behavior and creating tests that lock down the current state.

Core Features & Use Cases

  • Behavior Characterization: Capture the current behavior of your code to prevent regressions.
  • Test Suite Creation: Generate a suite of tests to confirm that your code still functions as expected after changes.
  • Use Case: Before refactoring a part of your codebase, use this Skill to ensure that you have tests in place to confirm that the changes did not introduce any unexpected behavior.

Quick Start

Run the safety-net skill on the target code area to generate tests and lock down the current behavior.

Frequently Asked Questions about safety-net

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

FAQPage Schema
What is characterization testing and how does it prevent regressions?

Characterization testing captures and locks down the current observable behavior of your code into a test suite, preventing regressions by ensuring future refactoring does not introduce unexpected changes.

How do I generate a test suite before refactoring low-coverage code?

You generate a test suite by running the safety-net skill on your target code area, which characterizes the current behavior and creates regression guards for safe code changes.

When do I need to lock down code behavior for safe changes?

You need to lock down code behavior before refactoring or fixing low-coverage code areas to protect against regressions and confirm your changes do not alter existing application behavior.

Can I use this approach to improve code stability for existing applications?

Yes, you can use this approach to improve code stability by generating tests that capture the current state of your code, providing a regression guard for future modifications and refactoring.

What are the limitations of relying on characterization tests?

Characterization tests lock down current observable behavior exactly as it exists, meaning they will capture and validate existing bugs alongside intended functionality unless explicitly corrected during later refactoring.