First off, thanks for taking the time to contribute!
Detailed contributor info can be found in our documentation on https://docs.pmd-code.org/latest/pmd_devdocs_contributing.html.
Pull Requests are welcome. Create them against the main branch.
Building: Make sure, you can build PMD locally. You need Java 11+, then run ./mvnw clean verify.
Guides for using various IDEs are available at https://docs.pmd-code.org/latest/pmd_devdocs_building_general.html.
Code of Conduct: https://github.com/pmd/pmd/blob/main/code_of_conduct.md
Bug Reports / Features: We use the issue tracker on GitHub. Please report new bugs and feature requests at https://github.com/pmd/pmd/issues.
Reporting Security Issues: https://github.com/pmd/pmd/security/advisories/new
Main Documentation: https://docs.pmd-code.org/latest
Questions: There are various channels, on which you can ask questions:
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On StackOverflow: Make sure, to tag your question with "pmd".
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Create a new discussion for your question at https://github.com/pmd/pmd/discussions.
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Ask your question in our Gitter room.
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Ask your question our PMD Guru at Gurubase.