Glad to hear that you are interested! It will be awesome to see a MACADAM plugin!
Developer documentation is here: https://dev.qiime2.org/latest/
In particular see the tutorials here: https://dev.qiime2.org/latest/tutorials/
That includes a beginner’s tutorial that @cduvallet put together a while back that is useful for anyone tackling their first QIIME 2 plugin!
In addition to announcing the forum and writing a tutorial on this forum, you should also be aware of the q2 Library as a clearing house for hosting information about q2 plugins: https://library.qiime2.org/
And of course get in touch on this forum with any specific questions (or even just more questions about getting started) — e.g., I can imagine you may have questions about appropriate semantic types for the inputs/outputs of MACADAM. Using the
developers channel on this forum would be a great place to get help.