openrewrite/rewrite — Automated mass refactoring of source code.

Description and use

**Brief Summary**
OpenRewrite Rewrite is an open‑source Java library that automates large‑scale, systematic refactoring of source code. With a strong community (3,400+ stars, 500+ forks) and recent activity, it can be used to apply consistent code‑style, API‑migration, or security‑fix transformations across many repositories.

**Value**
Rewrite lets teams codify refactoring rules as reusable recipes, enabling one‑click, repeatable changes that would otherwise require manual, error‑prone edits. This accelerates migration to new libraries, enforces coding standards, and reduces technical debt at scale.

**Practical Adoption Path**

1. **Proof‑of‑concept** – Clone a small, representative module and run the supplied sample recipes to verify that the tool can parse and transform your codebase.
2. **Customize recipes** – Write or extend existing recipes to match your specific migration or linting goals, using the extensive documentation and examples in the README.
3. **Integrate into CI** – Add a Gradle/Maven plugin step that runs Rewrite in a non‑blocking mode (e.g., --dryRun) to generate pull requests or diff reports.
4. **Iterate and expand** – Gradually roll the validated recipes out to additional modules or services, monitoring build health and developer feedback.

**Production Readiness**
The project shows high production readiness: it is actively maintained (last update 2026‑05‑12), has a sizable user base, and is already adopted by several large enterprises for automated migrations. While the integration path isn’t fully documented in the metadata, the available plugins, clear API, and community support make it a solid candidate for a serious pilot, provided the initial setup cost is validated through the small PoC.

Problem

openrewrite/rewrite may be useful when its README and activity match a concrete workflow.

Outcome

High for an OSS candidate: recent activity, adoption, and ecosystem signals are strong enough for a serious pilot.

Evidence

Automated mass refactoring of source code.

Source