dependency-upgrade

# Dependency Upgrade Master major dependency version upgrades, compatibility analysis, staged upgrade strategies, and comprehensive testing approaches. ## Do not use this skill when - The task is unrelated to dependency upgrade - You need a different domain or tool outside this scope ## Instructions - Clarify goals, constraints, and required inputs. - Apply relevant best practices and validate outcomes. - Provide actionable steps and verification. - If detailed examples are required, open `resources/implementation-playbook.md`. ## Use this skill when - Upgrading major framework versions - Updating security-vulnerable dependencies - Modernizing legacy dependencies - Resolving dependency conflicts - Planning incremental upgrade paths - Testing compatibility matrices - Automating dependency updates ## Semantic Versioning Review ``` MAJOR.MINOR.PATCH (e.g., 2.3.1) MAJOR: Breaking changes MINOR: New features, backward compatible PATCH: Bug fixes, backward compatible ^2.3.1 = >=2.3.1 <3.0.0 (minor updates) ~2.3.1 = >=2.3.1 <2.4.0 (patch updates) 2.3.1 = exact version ``` ## Dependency Analysis ### Audit Dependencies ```bash # npm npm outdated npm audit npm audit fix # yarn yarn outdated yarn audit # Check for major updates npx npm-check-updates npx npm-check-updates -u # Update package.json ``` ### Analyze Dependency Tree ```bash # See why a package is installed npm ls package-name yarn why package-name # Find duplicate packages npm dedupe yarn dedupe # Visualize...