Welcome! Super happy to have you here.
A few things.
First, we have a code of conduct. Don't be a jerk.
We're not keen on vendor-specific stuff in this library, but if there are changes that need to happen in the spec to enable vendor-specific stuff in user code or other extension points, check out the spec.
Any contributions you make are expected to be tested with unit tests. You can validate these work with gradle test, or the automation itself will run them for you when you make a PR.
Your code is supposed to work with Java 11+.
If you think we might be out of date with the spec, you can check that by invoking python spec_finder.py in the root of the repository. This will validate we have tests defined for all of the specification entries we know about.
If you're adding tests to cover something in the spec, use the @Specification annotation like you see throughout the test suites.
Thanks and looking forward to your issues and pull requests.