This article was originally posted on the Rails at Scale blog.
In September, 2020, our team at Shopify released a Ruby gem named Packwerk, a tool to enforce boundaries and modularize Rails applications. Since its release, Packwerk has taken on a life of its own, inspiring blog posts, conference talks, and even an...

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Shopify Engineering

Packwerk is a tool developed by Shopify to enforce boundaries and modularize Rails applications. It helps decouple code and organize it into well-defined packages. However, it has weaknesses and blind spots, such as difficulty in defining packages correctly and resolving violations, and limited tracking of dynamically generated constants. Shopify is rethinking how they organize their monolith, focusing on running code and functional units rather than domains.

A Packwerk Retrospective