🗺️ Change Impact Mapper

What it does

The Change Impact Mapper provides a comprehensive "blast radius" analysis of your code changes. By performing static analysis on your diffs or changed files, it identifies exactly which downstream modules, functions, and services depend on the code you modified. It cross-references these findings with existing test suites to pinpoint which areas are safely covered and which are high-risk gaps.

Why use this skill

Manual impact analysis is error-prone and time-consuming. This skill automates the discovery of reverse imports and symbol callers across your repository. Unlike generic AI prompting, this tool uses a dedicated Python-based scanner to ensure accuracy in cross-module dependency mapping for Python and JavaScript/TypeScript projects. It helps you catch breaking changes in downstream dependencies before you even run your CI pipeline.

Supported tools

• Languages: Full support for Python, JavaScript, and TypeScript.
• Frameworks: Works with standard import structures and symbol references.
• Analysis: Static reverse-reference mapping and test coverage correlation.

The Output

You receive a structured report detailing the scope of inspection, specific changed targets, impact findings categorized by severity (flagging high fan-in risks), a list of covering tests, and identified coverage gaps.