https://github.com/wildfly/wildfly-core/blob/main/CONTRIBUTING.md has useful content about Issues that is not present in https://github.com/wildfly/wildfly/blob/main/CONTRIBUTING.md.

What's missing is somewhat covered in the linked https://github.com/wildfly/wildfly/blob/main/docs/src/main/asciidoc/_hacking/contributing.adoc but not all, and I think there's value in having it be more prominent.