ContactAny questions about Coccinelle may be directed to email@example.com. The mailing list is moderated for non-members. You can subscribe, manage your subscription, or see the archives at https://sympa.inria.fr/sympa/info/cocci. The mailing list is also available through lore.
There is also an IRC channel #cocci on irc.freenode.net. Using the mailing list, however, makes it possible for others to benefit from your questions, both now and in the future.
Contributions are likewise preferred via the mailing list, but can also be submitted on github.