Welcome to the Workshop on Open Research Infrastructures and Toolkits for 6G (OpenRIT6G), held in conjunction with ACM SIGCOMM 2025 in Coimbra, Portugal

The transition from 5G to 6G calls for a fundamental shift toward AI-driven, programmable, and federated research infrastructures. These infrastructures must support large-scale, reproducible, and practical experimentation, while also fostering small-scale, local innovations aimed at connecting the unconnected. Unlike previous generations, 6G networks are envisioned to integrate AI/ML, cloud-edge continuum, and network automation to enable autonomous management, optimised resource allocation, and intelligent traffic engineering. However, achieving this ambitious vision demands open, vendor-neutral testbeds and software toolkits to facilitate hands-on experimentation and real-world validation of emerging technologies. Recognising this critical need, the OpenRIT6G workshop provides a unique platform for researchers and practitioners to discuss and showcase experimental, AI-driven, and federated 6G testbeds and frameworks. We encourage the exploration of open methodologies, open-source toolkits, federated cloud-edge deployments, multi-domain interoperability, AI-driven network automation, and digital twin-based experimentation. This inaugural event aims to foster collaboration among academia, industry leaders, and open-source communities to accelerate the development of open, reproducible, and scalable research infrastructures that will be pivotal for the evolution towards AI-native, cloud-native, and highly adaptive 6G networks.