openrewrite/rewrite

Automated mass refactoring of source code.

Stars: 3.7k
Forks: 570
Open beginner issues: 0
Indexed issues: 218
Avg merge: 13h 12m
Merged PRs (30d): 261

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 19, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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218 open issues indexed

GroovyParser - errors on lambda arg without parens Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 75/100

openrewrite/rewrite#8879 · 1 comment · Opened Sep 14, 2026
Extend RemoveRedundantDependencyVersions to also remove redundant dependencyManagement entries managed by an imported BOM Open

Difficulty 3/5 1-2 days Newbie friendliness 70/100

openrewrite/rewrite#8862 · 1 comment · Opened Sep 11, 2026
Moderne CLI mcp `grep`: brace-expansion glob silently returns "No matches found" instead of an error Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

openrewrite/rewrite#8856 · Opened Sep 11, 2026
RPC-backed languages: parsed source files have no FileAttributes Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openrewrite/rewrite#8844 · Opened Sep 10, 2026
ChangePropertyKey + UnfoldProperties produce duplicate-key (invalid) YAML when relocating multiple properties into the same new nested prefix (regression from #8291) Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

openrewrite/rewrite#8838 · Opened Sep 9, 2026
Cannot upgrade to 3.38.0 Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 52/100

openrewrite/rewrite#8792 · 8 comments · Opened Sep 7, 2026
Python: an import normalizer for files mixing `import m` and `from m import x` Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

openrewrite/rewrite#8791 · Opened Sep 6, 2026
UpgradePluginVersion cannot raise a plugin whose version is managed by a parent outside the repository Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

openrewrite/rewrite#8775 · 1 comment · Opened Sep 4, 2026
Python: class decorated with an Any-returning decorator loses its type and its bases Open

Difficulty 4/5 3-5 days Newbie friendliness 68/100

openrewrite/rewrite#8772 · Opened Sep 4, 2026
ChangePackage/ChangeType do not apply to package-info.java Javadoc Open

Difficulty 3/5 1-2 days Newbie friendliness 75/100

openrewrite/rewrite#8731 · 1 comment · Opened Sep 1, 2026
Change preview in moderne.io shows tabs vs spaces substitutions as actual changes whereas generated diffs or PRs do not include those Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openrewrite/rewrite#8722 · Opened Aug 30, 2026
Java parse-to-print idempotence: untyped lambda in super() prints as varprocessBuilder Open

bug java java 25+

Difficulty 3/5 1-2 days Newbie friendliness 68/100

openrewrite/rewrite#8712 · 3 comments · Opened Aug 29, 2026
Refactor JAXB out Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 68/100

openrewrite/rewrite#8669 · Opened Aug 26, 2026
Kotlin recipe DSL: scan/generate phases silently dropped in K2 synthesis Open

kotlin recipe

Difficulty 4/5 3-5 days Newbie friendliness 55/100

openrewrite/rewrite#8657 · 1 comment · 1 reaction · Opened Aug 26, 2026
UpgradeDependencyVersion bumps a shared version property to a version its siblings never published Open

bug maven

openrewrite/rewrite#8656 · 2 comments · 1 assignee · Opened Aug 26, 2026
RemoveUnusedImports throws IndexOutOfBoundsException unfolding a static wildcard import from a package with a capitalized segment Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 92/100

openrewrite/rewrite#8654 · Opened Aug 26, 2026
Most language `Assertions` ignore `TypeValidation` entirely, including `unknown()` Open

enhancement parser

Difficulty 5/5 Over a week Newbie friendliness 42/100

openrewrite/rewrite#8568 · Opened Aug 20, 2026
RecipeRun does not distinguish a fixpoint from an exhausted cycle budget Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

openrewrite/rewrite#8498 · Opened Aug 13, 2026
Gradle ChangeDependency leaves an unversioned dependency when the new coordinates are unmanaged Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

openrewrite/rewrite#8465 · Opened Aug 11, 2026
Renaming coordinates without a newVersion carries the old version over to the new artifact Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

openrewrite/rewrite#8464 · Opened Aug 11, 2026
Renaming a parent's dependencyManagement leaves child modules with a stale MavenResolutionResult Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

openrewrite/rewrite#8463 · Opened Aug 11, 2026
ChangeDependency renames a managed dependency into unmanaged coordinates, leaving it without a version Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

openrewrite/rewrite#8462 · Opened Aug 11, 2026
Go: struct field tags lose information on parse/print Open

go parser

Difficulty 4/5 3-5 days Newbie friendliness 30/100

openrewrite/rewrite#8452 · 1 comment · Opened Aug 11, 2026
ChangeType: nested target types get an import that disagrees with how the reference is written Open

openrewrite/rewrite#8398 · 1 comment · 1 assignee · Opened Aug 5, 2026
Support Java 25 module import declarations (JEP 511) Open

java java 25+ parser

Difficulty 5/5 Over a week Newbie friendliness 35/100

openrewrite/rewrite#8367 · 1 comment · Opened Aug 3, 2026
Maven 4 transitive dependencyManagement changes resolved versions vs. rewrite-maven Open

maven

Difficulty 5/5 Over a week Newbie friendliness 35/100

openrewrite/rewrite#8347 · Opened Jul 29, 2026
Support classifiers on BOMs imported into `<dependencyManagement>` (Maven 4) Open

maven parser

Difficulty 4/5 3-5 days Newbie friendliness 55/100

openrewrite/rewrite#8345 · Opened Jul 29, 2026
ClassCastException: Py.Await wrapped in Py.StatementExpression cannot be cast to Statement on RPC receive Open

bug python

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openrewrite/rewrite#8322 · Opened Jul 24, 2026
ShortenFullyQualifiedTypeReferences drops the qualifier and import for nested types on Kotlin Open

openrewrite/rewrite#8237 · 2 comments · 1 assignee · Opened Jul 10, 2026
rewrite-javascript: quoted string object-literal key mis-typed as numeric J.Literal → NPE / NumberFormatException Open

bug javascript parser

Difficulty 3/5 1-2 days Newbie friendliness 68/100

openrewrite/rewrite#8203 · Opened Jul 9, 2026
Version-less pip recipe install does not upgrade an already-installed package (Python RPC engine) Open

bug python

openrewrite/rewrite#8180 · 2 comments · 1 assignee · Opened Jul 6, 2026
Kotlin and Groovy type attribution gaps behind AttributeValue's degraded classification Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openrewrite/rewrite#8170 · 1 comment · Opened Jul 3, 2026
Gradle 9.x: recipes for new 9.1–9.6 deprecations Open

gradle recipe

Difficulty 4/5 3-5 days Newbie friendliness 45/100

openrewrite/rewrite#7986 · Opened Jun 12, 2026
AddAnnotationProcessor: child with in-reactor parent is silently skipped when only the child passes the precondition Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openrewrite/rewrite#7850 · Opened Jun 1, 2026
Capture package-level annotations from dependency types via a new `JavaType.Package` Open

java parser

Difficulty 5/5 Over a week Newbie friendliness 28/100

openrewrite/rewrite#7721 · Opened May 18, 2026
Extract Maven dependencies/plugin versions as properties Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

openrewrite/rewrite#7654 · Opened May 12, 2026
TabsAndIndents (java): indent-normalisation trips over mixed indents. Open

documentation

openrewrite/rewrite#7579 · 7 comments · 2 assignees · Opened May 6, 2026
Some tests fail with expecting `moderne-gradle-plugin:0.2.1` in Artifactory Open

bug gradle

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

openrewrite/rewrite#7576 · 1 comment · Opened May 5, 2026
RemoveUnusedImports removes required static import for inherited nested type Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

openrewrite/rewrite#7569 · 1 comment · Opened May 5, 2026
JDK26 behaves differently than JDK25 - "There were problems parsing" Open

enhancement parser

Difficulty 5/5 Over a week Newbie friendliness 25/100

openrewrite/rewrite#7554 · 21 comments · Opened May 3, 2026
Why doesn't OpenRewrite fully migrate my code? Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

openrewrite/rewrite#7524 · 4 comments · Opened Apr 29, 2026
Route javac parser diagnostics through DiagnosticListener so logCompilationWarningsAndErrors=false silences all output Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openrewrite/rewrite#7421 · Opened Apr 17, 2026
JavaSourceSetUpdater in dependency recipes breaks rewrite-spring CI Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

openrewrite/rewrite#7367 · 2 comments · Opened Apr 14, 2026
URISyntaxException when resolving parent POM with unresolved `${revision}` placeholder Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

openrewrite/rewrite#7361 · Opened Apr 13, 2026
Jenkins parser does not resolve shared library methods from @Library Open

groovy parser

Difficulty 5/5 Over a week Newbie friendliness 40/100

openrewrite/rewrite#7229 · Opened Apr 1, 2026
Rewrite fails to load `classpath.tsv.gz` resources from additional GAVs of recipes when used as a library Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openrewrite/rewrite#6885 · 6 comments · Opened Mar 5, 2026
mavenProject is required even when testing changes to build.gradle Open

documentation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

openrewrite/rewrite#6881 · 1 comment · Opened Mar 5, 2026
Support Maven 4 versionless parent references (parent inference) Open

maven parser

openrewrite/rewrite#6869 · 1 comment · 1 assignee · Opened Mar 4, 2026
Maven add missing version to a dependency Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

openrewrite/rewrite#6770 · 11 comments · Opened Feb 19, 2026
Add Docker Compose file recipes to rewrite-docker Open

docker recipe

Difficulty 5/5 Over a week Newbie friendliness 30/100

openrewrite/rewrite#6723 · Opened Feb 12, 2026

A short digest of beginner-friendly GitHub issues.