Managing multiple related npm packages can be challenging, especially when they share core logic. Initially, using separate repositories seemed clean, but as packages grew, it became cumbersome. Every core fix required updating three repositories, and npm link often malfunctioned, leading to hours of debugging. Versions drifted, and without scopes, package relationships were unclear.

Adopting a monorepo structure significantly eased these issues. npm workspaces alone provided a robust solution, eliminating the need for special tools. Core fixes now require just one pull request, and local development is streamlined with auto-linking. Centralized version management and shared configuration files reduce errors and duplication.

This approach is ideal for packages that frequently change together, such as core libraries with framework bindings. However, for independent packages with different release cycles, separate repositories might be better. Tools like Changesets can automate version updates and publishing, ensuring dependency consistency and reducing manual errors.

For developers considering a monorepo, starting with npm workspaces is advisable. As needs grow, integrating tools like pnpm or Changesets can further enhance efficiency. This structured approach not only simplifies management but also ensures that related packages evolve cohesively.