We welcome all contributions to the development of NeuroML!
The main place we organise work is through issues, look here for the latest project wide issues: https://github.com/NeuroML/NeuroML2/issues
This project page also lists the main tasks currently being worked on.
To get an overview of the specifications, documentation, libraries for NeuroML see here: https://docs.neuroml.org.
Some NeuroML related issues are also added at: https://github.com/OpenSourceBrain/Contribute/issues.
If you have any other questions, please get in contact with one of the Editorial Board.