Song Jae-kyung, a first-generation developer known for creating Nexus: The Kingdom of the Winds, Lineage, and ArcheAge and currently an advisor at NEXUS, released a solo-developed MMORPG titled 'Open MMO' on GitHub on the 20th. The project features a structure where AI agents and human players connect via the same protocol, making it impossible for the server to distinguish between them, and uses a 'Vibe Coding' approach where the developer delegates coding tasks to AI. The core design philosophy is the 'equivalence of AI agents and humans,' with agents forced to connect via the exact same WebSocket protocol as humans. The game follows classic Ultima-style MMORPG conventions, featuring a 32km × 32km procedurally generated world, a quarter-view 3D perspective, seven character classes, and a dice-based stat distribution system. Song Jae-kyung, who introduced himself as an "unemployed person resting at home," said this is the first project he has created in 30 years without the burden of calculating commercial viability, and it serves as a record from someone witnessing the phase where AI has begun to replace human intellectual labor. He started working on it last August and has spent about seven months on it, excluding time off.