merge-trees efficiently combines multiple directory trees into a single output tree. This npm package is ideal for build processes where you need to consolidate assets from various sources. It's particularly useful for merging application code, dependencies (like those from Bower or npm itself), and generated assets, ensuring a streamlined and predictable deployment workflow. Manage overwrite strategies to control how conflicts are resolved when files with the same name exist in multiple input trees, providing greater build customization and reliability.