Dependency Upgrade

Master major dependency version upgrades, compatibility analysis, staged upgrade strategies, and comprehensive testing approaches.

Desesbraker Updated Sep 21, 2026 2 repo stars

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Last audited Sep 23, 2026 · commit 1a12a42

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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

# 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npm outdated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yarn outdated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

# See why a package is installed
npm ls package-name
yarn why package-name

# Find duplicate packages
npm dedupe
yarn dedupe

# Visualize dependencies
npx madge --image graph.png src/

Compatibility Matrix

// compatibility-matrix.js
const compatibilityMatrix = {
  'react': {
    '16.x': {
      'react-dom': '^16.0.0',
      'react-router-dom': '^5.0.0',
      '@testing-library/react': '^11.0.0'
    },
    '17.x': {
      'react-dom': '^17.0.0',
      'react-router-dom': '^5.0.0 || ^6.0.0',
      '@testing-library/react': '^12.0.0'
    },
    '18.x': {
      'react-dom': '^18.0.0',
      'react-router-dom': '^6.0.0',
      '@testing-library/react': '^13.0.0'
    }
  }
};

function checkCompatibility(packages) {
  // Validate package versions against matrix
}

Staged Upgrade Strategy

Phase 1: Planning

# 1. Identify current versions
npm list --depth=0

# 2. Check for breaking changes
# Read CHANGELOG.md and MIGRATION.md

# 3. Create upgrade plan
echo "Upgrade order:
1. TypeScript
2. React
3. React Router
4. Testing libraries
5. Build tools" > UPGRADE_PLAN.md

Phase 2: Incremental Updates

# Don't upgrade everything at once!

# Step 1: Update TypeScript
npm install typescript@latest

# Test
npm run test
npm run build

# Step 2: Update React (one major version at a time)
npm install react@17 react-dom@17

# Test again
npm run test

# Step 3: Continue with other packages
npm install react-router-dom@6

# And so on...

Phase 3: Validation

// tests/compatibility.test.js
describe('Dependency Compatibility', () => {
  it('should have compatible React versions', () => {
    const reactVersion = require('react/package.json').version;
    const reactDomVersion = require('react-dom/package.json').version;

    expect(reactVersion).toBe(reactDomVersion);
  });

  it('should not have peer dependency warnings', () => {
    // Run npm ls and check for warnings
  });
});

Breaking Change Handling

Identifying Breaking Changes

# Use changelog parsers
npx changelog-parser react 16.0.0 17.0.0

# Or manually check
curl https://raw.githubusercontent.com/facebook/react/main/CHANGELOG.md

Codemod for Automated Fixes

# React upgrade codemods
npx react-codeshift <transform> <path>

# Example: Update lifecycle methods
npx react-codeshift \
  --parser tsx \
  --transform react-codeshift/transforms/rename-unsafe-lifecycles.js \
  src/

Custom Migration Script

// migration-script.js
const fs = require('fs');
const glob = require('glob');

glob('src/**/*.tsx', (err, files) => {
  files.forEach(file => {
    let content = fs.readFileSync(file, 'utf8');

    // Replace old API with new API
    content = content.replace(
      /componentWillMount/g,
      'UNSAFE_componentWillMount'
    );

    // Update imports
    content = content.replace(
      /import { Component } from 'react'/g,
      "import React, { Component } from 'react'"
    );

    fs.writeFileSync(file, content);
  });
});

Testing Strategy

Unit Tests

// Ensure tests pass before and after upgrade
npm run test

// Update test utilities if needed
npm install @testing-library/react@latest

Integration Tests

// tests/integration/app.test.js
describe('App Integration', () => {
  it('should render without crashing', () => {
    render(<App />);
  });

  it('should handle navigation', () => {
    const { getByText } = render(<App />);
    fireEvent.click(getByText('Navigate'));
    expect(screen.getByText('New Page')).toBeInTheDocument();
  });
});

Visual Regression Tests

// visual-regression.test.js
describe('Visual Regression', () => {
  it('should match snapshot', () => {
    const { container } = render(<App />);
    expect(container.firstChild).toMatchSnapshot();
  });
});

E2E Tests

// cypress/e2e/app.cy.js
describe('E2E Tests', () => {
  it('should complete user flow', () => {
    cy.visit('/');
    cy.get('[data-testid="login"]').click();
    cy.get('input[name="email"]').type('user@example.com');
    cy.get('button[type="submit"]').click();
    cy.url().should('include', '/dashboard');
  });
});

Automated Dependency Updates

Renovate Configuration

// renovate.json
{
  "extends": ["config:base"],
  "packageRules": [
    {
      "matchUpdateTypes": ["minor", "patch"],
      "automerge": true
    },
    {
      "matchUpdateTypes": ["major"],
      "automerge": false,
      "labels": ["major-update"]
    }
  ],
  "schedule": ["before 3am on Monday"],
  "timezone": "America/New_York"
}

Dependabot Configuration

# .github/dependabot.yml
version: 2
updates:
  - package-ecosystem: "npm"
    directory: "/"
    schedule:
      interval: "weekly"
    open-pull-requests-limit: 5
    reviewers:
      - "team-leads"
    commit-message:
      prefix: "chore"
      include: "scope"

Rollback Plan

// rollback.sh
#!/bin/bash

# Save current state
git stash
git checkout -b upgrade-branch

# Attempt upgrade
npm install package@latest

# Run tests
if npm run test; then
  echo "Upgrade successful"
  git add package.json package-lock.json
  git commit -m "chore: upgrade package"
else
  echo "Upgrade failed, rolling back"
  git checkout main
  git branch -D upgrade-branch
  npm install  # Restore from package-lock.json
fi

Common Upgrade Patterns

Lock File Management

# npm
npm install --package-lock-only  # Update lock file only
npm ci  # Clean install from lock file

# yarn
yarn install --frozen-lockfile  # CI mode
yarn upgrade-interactive  # Interactive upgrades

Peer Dependency Resolution

# npm 7+: strict peer dependencies
npm install --legacy-peer-deps  # Ignore peer deps

# npm 8+: override peer dependencies
npm install --force

Workspace Upgrades

# Update all workspace packages
npm install --workspaces

# Update specific workspace
npm install package@latest --workspace=packages/app

Resources

references/semver.md: Semantic versioning guide
references/compatibility-matrix.md: Common compatibility issues
references/staged-upgrades.md: Incremental upgrade strategies
references/testing-strategy.md: Comprehensive testing approaches
assets/upgrade-checklist.md: Step-by-step checklist
assets/compatibility-matrix.csv: Version compatibility table
scripts/audit-dependencies.sh: Dependency audit script

Best Practices

Read Changelogs: Understand what changed
Upgrade Incrementally: One major version at a time
Test Thoroughly: Unit, integration, E2E tests
Check Peer Dependencies: Resolve conflicts early
Use Lock Files: Ensure reproducible installs
Automate Updates: Use Renovate or Dependabot
Monitor: Watch for runtime errors post-upgrade
Document: Keep upgrade notes

Upgrade Checklist

Pre-Upgrade:
- [ ] Review current dependency versions
- [ ] Read changelogs for breaking changes
- [ ] Create feature branch
- [ ] Backup current state (git tag)
- [ ] Run full test suite (baseline)

During Upgrade:
- [ ] Upgrade one dependency at a time
- [ ] Update peer dependencies
- [ ] Fix TypeScript errors
- [ ] Update tests if needed
- [ ] Run test suite after each upgrade
- [ ] Check bundle size impact

Post-Upgrade:
- [ ] Full regression testing
- [ ] Performance testing
- [ ] Update documentation
- [ ] Deploy to staging
- [ ] Monitor for errors
- [ ] Deploy to production

Common Pitfalls

Upgrading all dependencies at once
Not testing after each upgrade
Ignoring peer dependency warnings
Forgetting to update lock file
Not reading breaking change notes
Skipping major versions
Not having rollback plan

---name: dependency-upgrade-2description: Master major dependency version upgrades, compatibility analysis, staged upgrade strategies, and comprehensive testing approaches.---# Dependency UpgradeMaster 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 changesMINOR: New features, backward compatiblePATCH: 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# npmnpm outdatednpm auditnpm audit fix# yarnyarn outdatedyarn audit# Check for major updatesnpx npm-check-updatesnpx npm-check-updates -u # Update package.json```### Analyze Dependency Tree```bash# See why a package is installednpm ls package-nameyarn why package-name# Find duplicate packagesnpm dedupeyarn dedupe# Visualize dependenciesnpx madge --image graph.png src/```## Compatibility Matrix```javascript// compatibility-matrix.jsconst compatibilityMatrix = { 'react': { '16.x': { 'react-dom': '^16.0.0', 'react-router-dom': '^5.0.0', '@testing-library/react': '^11.0.0' }, '17.x': { 'react-dom': '^17.0.0', 'react-router-dom': '^5.0.0 || ^6.0.0', '@testing-library/react': '^12.0.0' }, '18.x': { 'react-dom': '^18.0.0', 'react-router-dom': '^6.0.0', '@testing-library/react': '^13.0.0' } }};function checkCompatibility(packages) { // Validate package versions against matrix}```## Staged Upgrade Strategy### Phase 1: Planning```bash# 1. Identify current versionsnpm list --depth=0# 2. Check for breaking changes# Read CHANGELOG.md and MIGRATION.md# 3. Create upgrade planecho "Upgrade order:1. TypeScript2. React3. React Router4. Testing libraries5. Build tools" > UPGRADE_PLAN.md```### Phase 2: Incremental Updates```bash# Don't upgrade everything at once!# Step 1: Update TypeScriptnpm install typescript@latest# Testnpm run testnpm run build# Step 2: Update React (one major version at a time)npm install react@17 react-dom@17# Test againnpm run test# Step 3: Continue with other packagesnpm install react-router-dom@6# And so on...```### Phase 3: Validation```javascript// tests/compatibility.test.jsdescribe('Dependency Compatibility', () => { it('should have compatible React versions', () => { const reactVersion = require('react/package.json').version; const reactDomVersion = require('react-dom/package.json').version; expect(reactVersion).toBe(reactDomVersion); }); it('should not have peer dependency warnings', () => { // Run npm ls and check for warnings });});```## Breaking Change Handling### Identifying Breaking Changes```bash# Use changelog parsersnpx changelog-parser react 16.0.0 17.0.0# Or manually checkcurl https://raw.githubusercontent.com/facebook/react/main/CHANGELOG.md```### Codemod for Automated Fixes```bash# React upgrade codemodsnpx react-codeshift <transform> <path># Example: Update lifecycle methodsnpx react-codeshift \ --parser tsx \ --transform react-codeshift/transforms/rename-unsafe-lifecycles.js \ src/```### Custom Migration Script```javascript// migration-script.jsconst fs = require('fs');const glob = require('glob');glob('src/**/*.tsx', (err, files) => { files.forEach(file => { let content = fs.readFileSync(file, 'utf8'); // Replace old API with new API content = content.replace( /componentWillMount/g, 'UNSAFE_componentWillMount' ); // Update imports content = content.replace( /import { Component } from 'react'/g, "import React, { Component } from 'react'" ); fs.writeFileSync(file, content); });});```## Testing Strategy### Unit Tests```javascript// Ensure tests pass before and after upgradenpm run test// Update test utilities if needednpm install @testing-library/react@latest```### Integration Tests```javascript// tests/integration/app.test.jsdescribe('App Integration', () => { it('should render without crashing', () => { render(<App />); }); it('should handle navigation', () => { const { getByText } = render(<App />); fireEvent.click(getByText('Navigate')); expect(screen.getByText('New Page')).toBeInTheDocument(); });});```### Visual Regression Tests```javascript// visual-regression.test.jsdescribe('Visual Regression', () => { it('should match snapshot', () => { const { container } = render(<App />); expect(container.firstChild).toMatchSnapshot(); });});```### E2E Tests```javascript// cypress/e2e/app.cy.jsdescribe('E2E Tests', () => { it('should complete user flow', () => { cy.visit('/'); cy.get('[data-testid="login"]').click(); cy.get('input[name="email"]').type('user@example.com'); cy.get('button[type="submit"]').click(); cy.url().should('include', '/dashboard'); });});```## Automated Dependency Updates### Renovate Configuration```json// renovate.json{ "extends": ["config:base"], "packageRules": [ { "matchUpdateTypes": ["minor", "patch"], "automerge": true }, { "matchUpdateTypes": ["major"], "automerge": false, "labels": ["major-update"] } ], "schedule": ["before 3am on Monday"], "timezone": "America/New_York"}```### Dependabot Configuration```yaml# .github/dependabot.ymlversion: 2updates: - package-ecosystem: "npm" directory: "/" schedule: interval: "weekly" open-pull-requests-limit: 5 reviewers: - "team-leads" commit-message: prefix: "chore" include: "scope"```## Rollback Plan```javascript// rollback.sh#!/bin/bash# Save current stategit stashgit checkout -b upgrade-branch# Attempt upgradenpm install package@latest# Run testsif npm run test; then echo "Upgrade successful" git add package.json package-lock.json git commit -m "chore: upgrade package"else echo "Upgrade failed, rolling back" git checkout main git branch -D upgrade-branch npm install # Restore from package-lock.jsonfi```## Common Upgrade Patterns### Lock File Management```bash# npmnpm install --package-lock-only # Update lock file onlynpm ci # Clean install from lock file# yarnyarn install --frozen-lockfile # CI modeyarn upgrade-interactive # Interactive upgrades```### Peer Dependency Resolution```bash# npm 7+: strict peer dependenciesnpm install --legacy-peer-deps # Ignore peer deps# npm 8+: override peer dependenciesnpm install --force```### Workspace Upgrades```bash# Update all workspace packagesnpm install --workspaces# Update specific workspacenpm install package@latest --workspace=packages/app```## Resources- **references/semver.md**: Semantic versioning guide- **references/compatibility-matrix.md**: Common compatibility issues- **references/staged-upgrades.md**: Incremental upgrade strategies- **references/testing-strategy.md**: Comprehensive testing approaches- **assets/upgrade-checklist.md**: Step-by-step checklist- **assets/compatibility-matrix.csv**: Version compatibility table- **scripts/audit-dependencies.sh**: Dependency audit script## Best Practices1. **Read Changelogs**: Understand what changed2. **Upgrade Incrementally**: One major version at a time3. **Test Thoroughly**: Unit, integration, E2E tests4. **Check Peer Dependencies**: Resolve conflicts early5. **Use Lock Files**: Ensure reproducible installs6. **Automate Updates**: Use Renovate or Dependabot7. **Monitor**: Watch for runtime errors post-upgrade8. **Document**: Keep upgrade notes## Upgrade Checklist```markdownPre-Upgrade:- [ ] Review current dependency versions- [ ] Read changelogs for breaking changes- [ ] Create feature branch- [ ] Backup current state (git tag)- [ ] Run full test suite (baseline)During Upgrade:- [ ] Upgrade one dependency at a time- [ ] Update peer dependencies- [ ] Fix TypeScript errors- [ ] Update tests if needed- [ ] Run test suite after each upgrade- [ ] Check bundle size impactPost-Upgrade:- [ ] Full regression testing- [ ] Performance testing- [ ] Update documentation- [ ] Deploy to staging- [ ] Monitor for errors- [ ] Deploy to production```## Common Pitfalls- Upgrading all dependencies at once- Not testing after each upgrade- Ignoring peer dependency warnings- Forgetting to update lock file- Not reading breaking change notes- Skipping major versions- Not having rollback plan

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