I'm excited to join the editorial board of a new diamond open access journal in mathematical logic:
ZML: Zeitschrift für Mathematische Logik und Grundlagen der Mathematik
The open letter of the editors of ZML can be found online on the webpage.
More on the collective action and an editorial board walk-out that led to the creation of this new journal:
https://blog.tib.eu/2025/04/07/mlq-walk-out/