The Lost Cities – DevTool

The Lost Cities – DevTool

A companion mod for The Lost Cities. Build a pack by building it in Minecraft, open a pack you already have by walking around inside it, and find the mistake in the one you are writing.

It adds no blocks, items, mobs or structures to your world, and nothing it does changes world generation unless you switch on one of the optional fixes.

Downloads

Pick the file that matches your Lost Cities version. Both files are the same mod.

Features

• Builds a whole pack out of what you build in game, from a workshop dimension with a plot for every shape a pack can hold
• Opens a pack you already have, including the Lost Cities default pack, so you can edit it and compile it back out
• Names the building that caused a generation error, and where it is
• Checks your files as they load and reports the file and line number. Nothing is blocked from loading.
• Lets you write comments and trailing commas in your JSON, and use .json5 files
• Shows which building, part and floor the generator picked for a chunk, and looks up palette characters and blocks in both directions
• Carries a pack’s licence with the pack, so credit is not lost in a rebuild
• Keeps a broken file from crashing sphere worlds

Good To Know

• The machine loading the pack needs the mod. Without it, Lost Cities cannot read .json5 files, and .json files with comments or trailing commas fail to load.
• Everything runs on the server. A client install is optional.
• Two fixes for bugs in Lost Cities itself are off by default, because turning one on changes what a seed generates.

Learn More

Every command, argument and flag is written up in The DevTool Commands, and the rest of the Lost Cities Wiki covers the format itself with examples. Three example datapacks build the same small city three different ways.

Credits And Licence

The Lost Cities is created by McJty. DevTool is an unofficial companion mod and is not affiliated with or endorsed by McJty or The Lost Cities.

Released under 0BSD.