# openrewrite/rewrite

Automated mass refactoring of source code.

Repository: https://github.com/openrewrite/rewrite
Canonical: https://ross.abutalabs.com/products/rewrite
Homepage: https://docs.openrewrite.org
Language: Java
License: Apache-2.0
License Family: permissive
Topics: java, ast, abstract-syntax-tree, refactoring, refactoring-tools, code-search
Last push: 2026-08-26T20:02:38+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 2304, "days_push": 7, "days_rel": 7, "gap_med": 1.0, "n_releases_24m": 239}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3673, forks 563 (observed 2026-08-28T04:08:13.584771+00:00)

## What it is
OpenRewrite is an open-source automated refactoring ecosystem that parses source code into Lossless Semantic Trees and applies prepackaged recipes to make minimally invasive changes. It supports multiple languages (Java, Kotlin, Groovy, JavaScript/TypeScript, Python, C#) and integrates via Maven and Gradle plugins.

## Use cases
- migrate a Java project to a new framework version
- automatically fix security vulnerabilities across a codebase
- enforce stylistic consistency like static imports
- eliminate technical debt with mass code changes
- write custom refactoring recipes for my team's conventions
- search and transform code via an abstract syntax tree

## When to choose
- you need large-scale, repeatable code migrations or security patches
- you want changes that preserve original formatting
- your project is JVM-based (Maven/Gradle) or uses a supported language

## When to avoid
- you need a one-off manual edit better done in an IDE
- your language or framework has no available recipes
- you need real-time in-editor refactoring rather than batch transformations

## Facets
- artifact type: library
- maturity: active
- function: parser, developer-tools, build-tool, search-engine
- domain: developer-tools, version-control, programming-languages
- platform: jvm, cli, cross-platform
- tags: refactoring, ast, lossless-semantic-trees, code-migration, recipes, static-analysis, technical-debt, framework-migrations, security-fixes, automation

## Member repositories
- openrewrite/rewrite (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:13.584771+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:31:18.109102+00:00, confidence not recorded.
  - readme: https://github.com/openrewrite/rewrite (fetched 2026-08-28T04:08:13.584771+00:00, sha e61aa746d552)
  - homepage: https://docs.openrewrite.org (fetched 2026-08-29T09:25:20.979058+00:00, sha 7a9d5f80c11c)
  - site_page: https://docs.openrewrite.org/running-recipes/getting-started (fetched 2026-08-29T09:25:20.988230+00:00, sha 3c5edcc18e8f)
  - site_page: https://docs.openrewrite.org/changelog (fetched 2026-08-29T09:25:20.990261+00:00, sha 9f5a5d95ce0d)
- Data as of 2026-08-30T08:39:29.467469+00:00.