Under the hood · three-part foundation series

How things are done.

Inside the Java server boundary: how an exact-build agent, a connectionless IsoPlayer, and independent world relevance made the project possible.

Foundation series

One idea, taken apart at its boundaries.

Part 01JAVA BOOTSTRAP

Lua Ends Here

True MP NPC began where Project Zomboid's normal Lua modding surface ended: inside the exact Java server build, on the authoritative server thread.

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Part 02PLAYER IDENTITY

The Connection Was Never the Player

The first breakthrough came from separating Project Zomboid's simulated player entity from its network transport, login identity, and connection-owned registries.

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Part 03REPLICATION & WORLD PRESENCE

No Client, Still a World

A connectionless IsoPlayer could be rendered through vanilla packets, but running with zero humans required separating network transport from world relevance as well.

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