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    Claude CodeClaude CodeCursorCursorCodex CLICodex CLIGitHub CopilotGitHub CopilotGemini CLIGemini CLI+20 more

    🗺️ Change Impact Mapper

    1

    The Change Impact Mapper provides a comprehensive "blast radius" analysis of your code changes.

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    🗺️ Change Impact Mapper

    🗺️ Change Impact Mapper

    Example session with this skill installed

    Check the blast radius of my recent changes to the auth validation logic in src/auth/utils.ts.

    • Read your context and instructions
    • Compiled the change impact mapper

    Impact Analysis: src/auth/utils.ts

    Changed Targets: validateSessionToken
    Downstream Impact:

    • [High] src/api/middleware.ts: Imports validation logic (Line 42)
    • [Low] src/cli/debug.ts: Reference found in logger
      Covering Tests: tests/auth_test.ts
      Missed Coverage: No tests found for middleware.ts integration.

    Connects securely to your tools. The creator never sees your data.

    What you get

    Identify all downstream files affected by a function signature changeFlag high-risk changes that lack corresponding test coverageDetect "high fan-in" modules that may cause widespread regressionsAudit the impact of an edit before committing to a shared codebase

    About this skill

    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.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

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    2. 2

      Unzip into your skills folder

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    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

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    Verified clean 3 months ago

    • Passed all security checks, Safe to install

    Listed3 months ago

    What's inside

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