The Myrddin hackers hang out in #myrddin on irc.eigenstate.org. Most design discussion happens there. You can join using your favorite client, or online via kiwi IRC
We also have the myrddin-dev mailing list on eigenstate.org, which is largely used for announcements and design summaries.
The canonical code repository is on https://git.eigenstate.org, but is mirrored on GitHub. We will accept patches on the mailing lists, GitHub pull requests, or snail mail (Please inquire in IRC for the address).
Proposing Libraries for Inclusion
If you've written a library for Myrddin, and you feel like it can be merged with the current standard library, or it is generally useful enough to be shipped along with the compiler, feel free to contact us.
Overall, Myrddin's plan is to ship with a wide variety of "batteries included" libraries, and we'd love to have your code be a part of that.
Updating the site
This website is maintained using markdown, and is stored in git. We accept pull requests for it, and treat it like a wiki.
git clone git://git.eigenstate.org/git//ori/myrsite.git
Should you wish to generate the HTML locally, the site is generated using USSM, and compiled with a mildly customized Markdown compiler, which knows how to generate runnable code snippets. This markdown compiler is available here.