Commands & Data guides — page 2

Enchantments became datapack JSON, so a custom one needs no mod. Here is the file shape, the effect components that actually do something, and how to make it obtainable.

The four numbers after the position are not a direction. Here is what delta and speed do, why count=0 behaves completely differently, and how to aim a particle.

A head stores a skin snapshot, not a live link. Here is the profile component, why an old head shows the wrong skin, and how UUID lookup fits in.

A shaped recipe that will not craft usually has its key wrong or its pattern padded. Here is the JSON, the tag trick that collapses eight recipes into one, and how to test.

Most scoreboard tutorials only use dummy. The built-in criteria track deaths, blocks mined and custom stats with no commands at all — here is the full shape.

An id is not always what the item is called, and a block id is not the same as its item id. The naming rules, the renames that break old commands, and where states fit.

Section-sign codes still work in some places and are ignored in others. Here is the full table, the hex syntax that replaced them, and which contexts accept what.

A bossbar survives restarts and a title does not. Here is the create-then-modify pattern, the fade timings people set backwards, and how to drive a progress bar.

Datapack dialogs give you a proper window with inputs and buttons. Here is the JSON shape, how a button runs a command, and how it compares to the book-menu hack.

Two ways to move a camera in vanilla — a ticking teleport function, or the timeline registry. What each is good for, and the smoothing that stops it looking robotic.