Structures Arbiter

I developed it in collaboration with AI.

For port requests and bug reports, please use the CurseForge comments.

Structure Arbiter

Stop structure mods from overlapping each other.

Install a dozen structure mods and you’ll eventually see a fortress cut in half by a village, or a dungeon swallowed by a mineshaft. Structure Arbiter settles these conflicts *before* anything is built, so big structures stay intact and small ones keep their distance.

How it works

Instead of letting every mod stamp blocks over its neighbours, Structure Arbiter looks at where each structure *wants* to go (its bounding box) and decides, per structure, whether it gets to exist:

– Structures are ranked by priority, then by structure ID, so the result never depends on mod load order.
– A structure that would collide with a higher-ranked one is dropped, so the higher-ranked one is never overwritten.
– Decisions depend only on the **world seed and coordinates**, so the same seed gives the same layout wherever you walk.
– The same structure never competes with itself. Each mod’s own spacing rules still apply.

 Features

– Works with structures registered through vanilla structure sets, including most structure mods
– No new blocks, items or world-gen features; it only arbitrates what already generates
– Lightweight lookahead with biome pre-filtering, so adding many mods doesn’t freeze world generation
– Configurable: spacing threshold, margin between structures, excluded mods or structures, lookahead range
– In-game debug tools (OP only):
  – “/arbiter stats” shows what was kept or dropped, and which structures are slow
  – “/arbiter here” lists the structures around you and why each was kept or dropped
  – “/arbiter debug on|off” logs every rejection and its cause
– Verbose JVM debug flag:
  – Add “-Darbiter.debug=true” to your Java launch arguments to output detailed Arbiter logs directly to the launcher console.

 Limitations

– Ring-placed structures (such as strongholds) are not arbitrated.
– Mods that place blocks with custom code, outside the structure system, can’t be seen by the arbiter.
– Dropped structures are removed, not moved. Moving is supported internally but off by default. If you wish to enable the shifting feature, please open “arbiter-common.toml” in your config folder and modify the value of defaultMaxShiftBlocks.

Safe to add to an existing world, but only newly generated chunks are affected.

Early release: feedback and conflict reports are welcome.