I hooked up an MCP server to a MUD and got some pretty amazing results, including Claude Code agents in separate windows chatting with each other and cooperating on building out a new section.
I'd like `mud_or_moo --state-dir ./tmp/some-mud` which stored most things as plain text or maybe SQLite if really necessary? The core of a MUD which was conceptually similar to a wiki-browser against markdown files (ie: room-001.md => exits => room-002.md) is what i'm angling towards, such that _editing and linking_ felt more comfortable and GUI to a human user.
Once i had the core authorship mcp's working, claude itself created the whole world, including an initial tutorial sequence, combat, etc...
I've walked an agent through Home Assistant => Wiki-per-room => Zork-Me! ...and it turns out that the actual Inform Zork engine is pretty terrible but it's fun to say "go north ; look table" (and eventually "turn on ha.light_001" ;-).
The "MUD/MOO" aspect is where it opens interesting options of actually curling out to the home assistant instance, and the just kindof wild fun of making a functional "quest" in the context of your own home (eg: solve a mystery? make dinner? battling another user for the TV remote? :-D)