#serverless
1 post
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Introducing The Hollow Grid, a multiplayer MUD that runs entirely on Cloudflare Workers and Durable Objects: one Durable Object holds a whole world, WebSocket hibernation lets it sleep at $0 when empty, and a single alarm drives all of time. It is also a small federation, where separate world deployments share one backend Grid (one faction war, one character that travels between worlds) over a service-binding RPC contract. Notes on the design rules that make it testable, the structured event channel that drives the client, a bot, and the tests alike, the cross-Worker bug that taught us how service bindings really behave, and the human-and-AI collaboration that built it.