Which project environments does the Modernize skill support?

The Modernize skill is specifically scoped for Node.js and TypeScript projects using package managers like npm, yarn, or pnpm.

Does it support pre-release or beta versions?

No, the skill is strictly constrained to stable releases to ensure production reliability and prevent experimental code from entering your project.

What happens if a dependency upgrade breaks my build?

The skill includes a built-in rollback procedure. If any phase fails and cannot be recovered, it restores the baseline package.json and lockfile, re-installs dependencies, and verifies project health.

How does it ensure code quality after an upgrade?

It enforces a minimum 85% test coverage threshold, runs security audits via npm audit, and performs 'spec synchronization' to ensure implementation still matches the project's requirements.

Brownfield Project Modernizer

Name: Brownfield Project Modernizer
Author: jschulte

byjschulte

•

Security & Testing

Automates dependency upgrades, breaking change fixes, and spec synchronization for Node.js and TypeScript projects.

The Modernize skill is a specialized tool for brownfield software projects that automates the transition to modern dependency versions while maintaining architectural integrity. It follows a rigorous seven-phase process that includes baseline capturing, automated upgrades using stable releases, spec-guided breaking change resolution, and validation of test coverage and security. By integrating with existing project specifications, it ensures that behavior remains consistent even as underlying libraries evolve, providing a comprehensive upgrade report and an automated rollback safety net for failed migrations.

Key Features

01Mandatory 85% test coverage enforcement across all modules

02Synchronization of project specifications with updated library behavior

031 GitHub stars

04Automated dependency upgrades to the latest stable releases

05Automated rollback procedures to maintain baseline stability

06Spec-guided resolution of breaking changes and API deprecations

Use Cases

01Aligning technical specifications with code implementations after major library updates

02Upgrading legacy Node.js/TypeScript repositories to current ecosystem standards

03Automating security patch management and dependency audit fixes

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jschulte/claude-plugins modernize

For use in Claude.ai and ChatGPT

Download Skill