Skills
.Work. You
Rest

before-after

Community

Prove your code changes work.

Software Engineering#testing#bug fix#verification#code changes#feature validation#delta proof
Authorcosmix
Version1.0.0
Installs0

System Documentation

What problem does it solve?

This Skill helps you definitively prove that your code changes have the intended effect by capturing system state before and after implementation, preventing regressions and ensuring new features work as expected.

Core Features & Use Cases

  • Delta-Proof Verification: Establishes that a stage actually changed system behavior, not just that the final state is valid.
  • New Feature Validation: Proves a feature didn't exist before and now works correctly.
  • Bug Fix Confirmation: Demonstrates that a bug existed and is now resolved.
  • Behavior Change Tracking: Verifies that old behavior is replaced by new behavior.
  • Use Case: When adding a new API endpoint, use this skill to prove it returned a 404 error before your stage and now returns valid data after.

Quick Start

Use the before-after skill to verify that the new loom check command now works after implementation.

Dependency Matrix

Required Modules

None required

Components

references

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: before-after
Download link: https://github.com/cosmix/loom/archive/main.zip#before-after

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
View Source Repository

Agent Skills Search Helper

Install a tiny helper to your Agent, search and equip skill from 223,000+ vetted skills library on demand.