Lerna Has a Free API — Here's How to Use It for Monorepo Package Management

Lerna is the original JavaScript monorepo tool, now maintained by Nx. It handles versioning, publishing, and task running for multi-package repositories. Getting Started npx lerna init lerna.json Configuration { "$schema" : "node_modules/lerna/schemas/lerna-schema.json" , "version" : "independent" , "npmClient" : "pnpm" , "useWorkspaces" : true } Running Commands Across Packages # Run build in all packages (topological order) lerna run build # Run tests in parallel lerna run test --parallel # Run only in specific packages lerna run build --scope = @myorg/core --scope = @myorg/utils # Run in changed packages only lerna run build --since = main Versioning # Independent versioning — each package versioned separately lerna version --conventional-commits # Fixed versioning — all packages share same version lerna version patch # Preview changes without committing lerna version --no-push --no-git-tag-version # See what changed lerna changed lerna diff Publishing to npm # Publish all changed p