The ATRIUM project (Advancing FronTier Research In the Arts and hUManities) aims to strengthen and integrate research infrastructure services across the arts and humanities. A central objective of the project is to support high-quality, cross-disciplinary research by improving how diverse research outputs are evaluated, recognised, and rewarded. This milestone delivers the first version of the ATRIUM Peer Review Framework, a qualitative, criteria-based assessment model designed to address structural biases in traditional research evaluation systems that privilege journal articles and citation-based metrics, while undervaluing critical research contributions such as datasets, models, workflows or software. By building community consensus around a peer review framework, ATRIUM aims to maximise the quality and impact of arts and humanities research in Europe and to recognise a wide variety of research outputs and “behind-the-scenes” work that are necessary for building and maintaining innovative research infrastructures. The first version of the framework defines three sets of evaluation criteria covering: data papers, workflow papers and training materials. All criteria are organised under four stable assessment categories (State of the Art, Content, Form and Accessibility and Reusability), which ensures coherence across output types while allowing output-specific interpretation. Lead Author(s): Françoise Gouzi (DARIAH), Toma Tasovac (BCDH)Co-author(s): Anne Baillot (DARIAH), Sarah Bénière (INRIA), Carol Delmazo (OPERAS), Vicky Garnett (DARIAH) Reviewers: Lulianna van der Lek (CLARIN), Megan Black (DARIAH), Tiziana Lombardo (NET7)