ChainTrain

# ChainTrain 0.3.0 beta — Paper 26.3

This release supports both ordinary and experimental minecart physics automatically.

- Couple up to five carts using iron chains, with one chain consumed per successful connection.
- Drive from the front cart on powered rails without a furnace cart.
- Stop the entire train when its driver leaves the front cart.
- Show vanilla iron-chain models between coupled carts, with no client mod or resource pack.
- Save couplings across server restarts and recover the original native physics when carts are detached.

**Requirements:** Paper for Minecraft 26.3, Java 25. No additional plugin dependencies. Other Minecraft versions and server implementations are not claimed as supported.

**Validation:** 17 automated tests; 1,935 experimental-world checks and 1,759 ordinary-world checks on Paper 26.3-169-46d4834. Server test drivers were artificial players; real-client gameplay and smoothness remain unverified. This is a beta release.

**Install or upgrade:** stop the server; remove older ChainTrain JARs from `plugins`; preserve `plugins/ChainTrain`; add `ChainTrain-0.3.0-paper26.3-beta.jar`; start the server.

Maintained by **vladnow**, licensed under MIT. Code and documentation were largely AI-generated and validated with automated and real-server checks.