ART3MIS.CLOUD is an independent research lab operating on Solana mainnet since 2020, from dedicated colocation under SOC 2 and ISO/IEC 27001, as the sole validator in both its datacenter and its ASN. Formalized in 2017, it is a team of five who have worked together for over two decades in cryptography, networking and security. First-hand experience in proof-of-stake consensus design and low-level engineering (Rust/C++) shapes how ART3MIS.CLOUD reasons about validator behaviour at the protocol level, not just operations.