upgrade-packages-js
Skill: Package Upgrade (Cross-Platform)
Safely upgrade JavaScript packages while minimizing breaking change risk, with migration guidance and automated code upgrades.
Non-Negotiables
- Verify JavaScript project first - Stop immediately if not a JS/Node.js project
- Never force upgrade all at once - Upgrade incrementally
- Detect package manager first - npm/pnpm/yarn (including version)
- Never mix package managers - Refuse if lockfiles conflict
- Git safety gate first - Clean repo + new branch before upgrades
- Breaking-change evidence check - For majors, check Releases/CHANGELOG/Migration/Codemods
- For breaking upgrades: migrate code + tests - Apply codemods, implement fixes, add tests
- Check peer dependencies - Ensure compatibility before upgrading
- Check Node.js engine compatibility - Verify target versions support project's Node
- Check ESM/CJS compatibility - Verify module system compatibility
- Test after each major upgrade - Run build and tests
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