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TNG/ArchUnit

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A Java architecture test library, to specify and assert architecture rules in plain Java

Is TNG/ArchUnit beginner-friendly?

In the last 30 days, TNG/ArchUnit merged 8 of 14 pull requests from outside contributors, and its maintainers usually reply within 1 day. No beginner-friendly issue is open right now; the list below has the other issues we hold for it.

Stars
3.9k
Forks
350
Open beginner issues
0
Indexed issues
161
Avg merge
1d 23h
Merged PRs (30d)
23
Dominant language
Java
License
Apache-2.0
Last GitHub push
Oct 5, 2026
Latest indexed
Oct 7, 2026
Contributing guide
No code of conduct
Beginner labels
help wanted

How to contribute to TNG/ArchUnit

  1. Read the contributing guide first: it says how the maintainers want changes proposed, tested and reviewed.
  2. Your contributions will be published under the project's Apache-2.0 license.
  3. Follow the repository to hear when a new beginner-friendly issue opens, or look through the other issues below.
Beginner friendly Everything
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Issues somebody may already be working on are listed last. List everything by date

  • ASM is not up-to-date
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 60/100

    TNG/ArchUnit#1757 ·

    Maintainers usually reply within 1 day

  • Clean up return types of `HasAnnotations` implementations
    Open
    • Is something wrong?
    breaking change

    Difficulty 5/5 Over a week Newbie friendliness 18/100

    TNG/ArchUnit#1756 ·

    Maintainers usually reply within 1 day

  • Turn `JavaType` and `JavaAnnotatedType` into `sealed interface`s
    Open
    • Is something wrong?
    breaking change

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

    TNG/ArchUnit#1755 ·

    Maintainers usually reply within 1 day

  • Clean up build and test infrastructure when dropping Java 8 (and potentially Java 11) support
    Open
    • Is something wrong?
    breaking change

    Difficulty 4/5 3-5 days Newbie friendliness 22/100

    TNG/ArchUnit#1754 ·

    Maintainers usually reply within 1 day

  • Add reflection to `JavaRecordComponent`
    Open
    • Is something wrong?
    breaking change

    Difficulty 3/5 Half a day Newbie friendliness 62/100

    TNG/ArchUnit#1753 ·

    Maintainers usually reply within 1 day

  • Tracker for ArchUnit v2
    Open
    • Is something wrong?
    breaking change

    Difficulty 5/5 Over a week Newbie friendliness 12/100

    TNG/ArchUnit#1752 ·

    Maintainers usually reply within 1 day

  • Integration tests failures in CI
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1737 · 1 comment ·

    Maintainers usually reply within 1 day

  • add JavaModule
    May be free again Open
    • Is something wrong?

    TNG/ArchUnit#1710 · 1 assignee ·

    Maintainers usually reply within 1 day

  • @PublicAPI should be documented
    May be free again Open
    • Is something wrong?
    enhancement

    TNG/ArchUnit#1701 · 1 assignee ·

    Maintainers usually reply within 1 day

  • Surfacing freeze store size as a signal: a green build is compatible with a growing store
    Open
    • Is something wrong?

    Difficulty 3/5 1-2 days Newbie friendliness 48/100

    TNG/ArchUnit#1700 ·

    Maintainers usually reply within 1 day

  • Not recognized dependency from "when-is" statement since kotlin 2.4.20-Beta2/RC
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1699 · 1 comment ·

    Maintainers usually reply within 1 day

  • gradle 'java-test-fixtures' plugin makes DoNotIncludeJars import option exclude main code
    Open
    • Is something wrong?

    Difficulty 3/5 Half a day Newbie friendliness 57/100

    TNG/ArchUnit#1662 ·

    Maintainers usually reply within 1 day

  • External Validation for ArchUnit Compatibility with Future JDK and Class File Versions
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1634 · 1 comment ·

    Maintainers usually reply within 1 day

  • Use source information from classfile attributes (when available) and expose path
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1623 · 2 comments ·

    Maintainers usually reply within 1 day

  • Use classfile API on JDK 26+
    May be free again Open
    • Is something wrong?
    enhancement on hold

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

    TNG/ArchUnit#1608 · 3 comments ·

    Maintainers usually reply within 1 day

  • Support for graalvm
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1605 · 1 comment ·

    Maintainers usually reply within 1 day

  • Assert on the classes in an ArchModule
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1592 ·

    Maintainers usually reply within 1 day

  • Check that a class has method that...
    Open
    • Is something wrong?

    Difficulty 3/5 1-2 days Newbie friendliness 48/100

    TNG/ArchUnit#1588 · 2 comments ·

    Maintainers usually reply within 1 day

  • Add `JavaClass.Predicates.isInterface()`
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 48/100

    TNG/ArchUnit#1586 ·

    Maintainers usually reply within 1 day

  • In the Onion Architecture/Port Adapter Architecture, it is not necessary to mandate the use of domain services.
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 46/100

    TNG/ArchUnit#1573 ·

    Maintainers usually reply within 1 day

  • Could LayeredArchitectureTest provide a friendlier error message?
    May be free again Open
    • Is something wrong?

    TNG/ArchUnit#1572 · 1 comment · 1 reaction · 1 assignee ·

    Maintainers usually reply within 1 day

  • Freezing violations should include all violations in the store?
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1563 ·

    Maintainers usually reply within 1 day

  • slices() architecture should take a DescribedPredicate<JavaClass>
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1536 · 1 reaction ·

    Maintainers usually reply within 1 day

  • use some kind of pair to define layeredArchitecture.
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1534 · 2 reactions ·

    Maintainers usually reply within 1 day

  • Performance enhancement suggestion: Simplified package matcher that only does a simple "Start with" check for better performance
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1522 ·

    Maintainers usually reply within 1 day

  • modules doesn't respect value as an alias for name issues
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1520 ·

    Maintainers usually reply within 1 day

  • no obvious negation for slices and modules.
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1500 · 1 comment ·

    Maintainers usually reply within 1 day

  • Use an Architecture Decision Record (ADR) as a reason for a ArchRule
    May be free again Open
    • Is something wrong?

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    TNG/ArchUnit#1495 ·

    Maintainers usually reply within 1 day

  • Bad Frozen error messages
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1494 · 1 comment ·

    Maintainers usually reply within 1 day

  • classes implement should respect interface extends
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1482 · 2 comments ·

    Maintainers usually reply within 1 day

  • packages assertions
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1481 ·

    Maintainers usually reply within 1 day

  • support isAbstract.
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1479 · 2 comments ·

    Maintainers usually reply within 1 day

  • Ignore error in layered architecture for specific parameters
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1458 ·

    Maintainers usually reply within 1 day

  • `getAllInvolvedRawTypes()` sometimes returns incorrect type variable bounds
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1449 · 3 comments ·

    Maintainers usually reply within 1 day

  • Add more/better examples for custom rules to the documentation
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1438 · 1 comment · 1 reaction ·

    Maintainers usually reply within 1 day

  • Access to Enum in SwitchCase
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 32/100

    TNG/ArchUnit#1433 · 2 comments ·

    Maintainers usually reply within 1 day

  • Tests fire with always false positive
    Open
    • Is something wrong?

    Difficulty 3/5 1-2 days Newbie friendliness 35/100

    TNG/ArchUnit#1424 · 2 comments ·

    Maintainers usually reply within 1 day

  • `.overridesMethod()` would be nice to have
    Open
    • Is something wrong?

    Difficulty 3/5 1-2 days Newbie friendliness 43/100

    TNG/ArchUnit#1417 · 1 comment ·

    Maintainers usually reply within 1 day

  • How to get parameter type at call time?
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1415 · 2 reactions ·

    Maintainers usually reply within 1 day

  • How to verify that a method is wrapped with try-with-resources?
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1389 · 1 comment ·

    Maintainers usually reply within 1 day

  • Annotations with target TYPE_USE are missing from JavaField instances
    May be free again Open
    • Is something wrong?

    TNG/ArchUnit#1382 · 27 comments · 8 reactions · 1 assignee ·

    Maintainers usually reply within 1 day

  • Studying lambda parameters for a forEach method call
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1379 · 1 comment ·

    Maintainers usually reply within 1 day

  • Missing use case for 'rule to handle more than one test class matching impl class'
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1367 ·

    Maintainers usually reply within 1 day

  • Didn't find rule 'classes should not be final'
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1363 · 4 comments ·

    Maintainers usually reply within 1 day

  • Allow to add test in a project to check if our rules are really applied
    Open
    • Is something wrong?

    Difficulty 2/5 1-3 hours Newbie friendliness 25/100

    TNG/ArchUnit#1348 · 1 comment ·

    Maintainers usually reply within 1 day

  • Enforce test failures based on the priority set
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1337 · 2 comments ·

    Maintainers usually reply within 1 day

  • DEPRECATED_API_SHOULD_NOT_BE_USED has false positive if a user doesn't actually use deprecated features
    Open
    • Is something wrong?

    Difficulty 4/5 3-5 days Newbie friendliness 43/100

    TNG/ArchUnit#1333 · 5 comments ·

    Maintainers usually reply within 1 day

  • Performance: archunit-junit5 may scan complete JDK for `@ArchTest`
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1316 · 5 comments · 1 reaction ·

    Maintainers usually reply within 1 day

  • Feature suggestion: Expose synchronized blocks in core API
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1315 ·

    Maintainers usually reply within 1 day

  • Check access classes only works for some cases
    Open
    • Is something wrong?

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

    TNG/ArchUnit#1311 · 1 comment ·

    Maintainers usually reply within 1 day

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