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What is the purpose of a CHANGELOG.md file in a Node.js project, and what should typically be included in each entry? What is a monorepo, and what specific tooling (like npm workspaces or Turborepo) helps manage multiple related Node.js packages within a single repository? What is semantic versioning (semver), and how does it inform how a Node.js package's version number should change between releases? How would you set up branch protection rules and required status checks for a Node.js repository to prevent broken code from being merged? What is a pull request template, and how does it help standardize code review in a Node.js team's Git workflow? What is the purpose of an npm 'scripts' section in package.json, and how do custom scripts standardize common project tasks across a team? How would you use Git hooks (like a pre-commit hook via Husky) to enforce code quality checks before code is committed in a Node.js project? How would you structure conventional commit messages in a Node.js project, and how do they enable automated changelog generation? How would you use Git bisect to find the specific commit that introduced a regression in a Node.js application's behavior? How would you configure a Node.js project's package.json to support both being used as a library (imported by others) and having its own development scripts, distinguishing dependencies from devDependencies correctly?
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What is the difference between npm, Yarn, and pnpm as Node.js package managers, and what specific advantage does pnpm offer regarding disk space?

Intermediate

Answer

All three install and manage a project's dependencies from the npm registry, offering broadly similar core functionality, but with different underlying implementations -- pnpm's key differentiator is its content-addressable storage approach, where every version of every package is stored once globally on disk and hard-linked into each project's node_modules, dramatically reducing disk usage and installation time when many projects on the same machine share overlapping dependencies, compared to npm and Yarn (in its default mode) which each duplicate a full copy per project.
# All three achieve a similar end result with different mechanics
npm install
yarn install
pnpm install  # uses a global content-addressable store, hard-linked per project
Real-world example A developer working across a dozen different Node.js projects notices their disk usage drop significantly after switching from npm to pnpm, since previously near-identical dependency trees across projects were each fully duplicated, while pnpm's hard-linking approach stores each unique package version only once.

Common follow-ups: What's the tradeoff or compatibility consideration when switching an existing project from npm to pnpm, given pnpm's stricter node_modules structure?;How does pnpm's approach affect a project's build reproducibility compared to npm or Yarn?

npm & Packages;Performance Optimization & Profiling
All 15 Git & Project Management questions