We are pleased to announce the launch of Compositionality, a new diamond open-access journal for research using compositional ideas, most notably of a category-theoretic origin, in any discipline. Topics may concern foundational structures, an organizing principle, or a powerful tool. Example areas include but are not limited to: computation, logic, physics, chemistry, engineering, linguistics, and cognition. To learn more about the scope and editorial policies of the journal, please visit our website at www.compositionality-journal.org. Compositionality is the culmination of a long-running discussion by many members of the extended category theory community, and the editorial policies, look, and mission of the journal have yet to be finalized. We would love to get your feedback about our ideas on the forum we have established for this purpose: http://reddit.com/r/compositionality Lastly, the journal is currently receiving applications to serve on the editorial board; submissions are due May 31 and will be evaluated by the members of our steering board: John Baez, Bob Coecke, Kathryn Hess, Steve Lack, and Valeria de Paiva. https://tinyurl.com/call-for-editors We will announce a call for submissions in mid-June. We're looking forward to your ideas and submissions! Best regards, Brendan Fong, Nina Otter, and Joshua Tan http://www.compositionality-journal.org/ [For admin and other information see: http://www.mta.ca/~cat-dist/ ]