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The Roots team has unveiled WP Composer, a new open source Composer repository for WordPress plugins and themes. The launch on March 16 follows closely on the heels of WP Engine’s acquisition of WPackagist, a widely-used Composer repository that mirrors the WordPress.org plugin and theme directories.
WP Composer is positioned as an alternative solution for developers who rely on Composer to manage dependencies in WordPress projects. According to Roots creator Ben Word, the repository aims to offer a free, community-driven option amid growing interest in Composer-based workflows for WordPress development.
WP Engine’s acquisition of WPackagist, announced just days earlier, has drawn attention to the strategic importance of Composer in modern WordPress site management. WPackagist has long been a staple for developers seeking a streamlined way to integrate plugins and themes directly into Composer-based projects. With WP Composer, Roots is signaling a commitment to open source principles in this space.
Why WP Composer Matters
The WordPress ecosystem has seen a steady rise in the adoption of Composer for dependency management, especially among agencies and developers building complex sites. Composer simplifies the process of managing third-party plugins and themes, reducing manual updates and potential conflicts. WP Composer enters a landscape where WPackagist has historically dominated, offering a similar service but with an explicit commitment to open source.

Roots has long been associated with developer-centric tools, such as Sage and Bedrock, that emphasize modern practices in WordPress development. WP Composer aligns with this philosophy, providing a tool that complements their existing stack while remaining accessible to the broader community.
Implications for Developers
WP Composer’s launch raises questions about the future of Composer repositories in WordPress. With WP Engine now controlling WPackagist, some developers may worry about potential changes to access, cost, or governance. WP Composer offers an alternative that could ensure continued availability of a free and open source repository.

Agencies and developers dependent on Composer workflows should evaluate WP Composer as part of their strategy. While the repository is new and may lack the maturity of WPackagist, its open source nature could make it an attractive option for those prioritizing transparency and community stewardship.
What To Do
- Developers: Explore WP Composer’s repository and documentation to assess compatibility with your existing Composer workflows.
- Agencies: Consider adopting WP Composer for client projects that prioritize open source solutions.
- Site Operators: Monitor developments around WPackagist and WP Composer to ensure your dependency management remains uninterrupted.