Is the output available in Japanese?

Yes, while the internal reasoning is performed in English, all user-facing reports, summaries, and interaction outputs are provided in Japanese.

Can I use this for dependency management?

Yes, it specifically checks for unused packages in your project dependencies using depcheck and proposes their removal if they are not being used.

How does the skill ensure that important code isn't deleted?

The skill categorizes findings by risk level and mandates a full test suite run before and after every single deletion. If any test fails, the change is immediately rolled back.

What specific tools does this skill use to find dead code?

It leverages knip to find unused exports and files, depcheck for unused dependencies, and ts-prune specifically for TypeScript export analysis.

What happens if a deletion breaks my build?

The skill will detect the build or test failure immediately, report the issue, and rollback the deletion to return the codebase to a stable state.

Safe Dead Code Cleanup

Name: Safe Dead Code Cleanup
Author: YuriNakayama

byYuriNakayama

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開発者ツール

Identifies and removes unused code, exports, and dependencies safely using automated test verification.

Safe Dead Code Cleanup is a specialized skill designed to prune technical debt by scanning projects for unused code, redundant TypeScript exports, and forgotten dependencies. By integrating industry-standard tools like knip, depcheck, and ts-prune, it generates a comprehensive risk-assessed report in Japanese. To ensure repository stability, the skill enforces a strict test-driven workflow where every deletion is verified against your existing test suite, with automatic rollbacks if a regression is detected.

主な機能

01Automatic rollback mechanism if tests fail during the cleanup process

020 GitHub stars

03Automated dead code analysis using knip, depcheck, and ts-prune

04Mandatory test-suite verification before and after every code removal

05Risk categorization for deletions (Safe, Caution, and Danger levels)

06Comprehensive Japanese-language reporting for all findings

ユースケース

01Pruning large legacy codebases to improve maintainability and reduce bundle size

02Identifying and removing unused third-party dependencies from package.json

03Cleaning up internal TypeScript exports to maintain a minimal and clean API surface

主な機能

01Automatic rollback mechanism if tests fail during the cleanup process

020 GitHub stars

03Automated dead code analysis using knip, depcheck, and ts-prune

04Mandatory test-suite verification before and after every code removal

05Risk categorization for deletions (Safe, Caution, and Danger levels)

06Comprehensive Japanese-language reporting for all findings

ユースケース

01Pruning large legacy codebases to improve maintainability and reduce bundle size

02Identifying and removing unused third-party dependencies from package.json

03Cleaning up internal TypeScript exports to maintain a minimal and clean API surface