Currently my biggest focus is my MUD Server I'm working on. Allows a developer to create a simple MUD game, (locations, items, combat), but all NPCs are actually just LLM controlled MUD clients.
Uses Server-Sent Events for the client + HTTP post for sending actions. Not a traditional direct TELNET style MUD server, but works well in the modern world.
Definitely not 100% hand-coded, probably only around 30% at this point, as I've had my original code refactored and expanded many times by now. It's taught me a lot about managing the agent in agentic-coding.