Datapack Codex

1.21.4 Pre-Release 1 — release journal

What 1.21.4-pre1 changed for data packs, measured against 24w46a, the build before it. Released 2024-11-20; development build — not a release.

💡 No measured change

Same data pack format, same registries. That is the strongest safe-for-data-packs signal a diff can give, and it is still not proof — behaviour changes and bug fixes are invisible to it.

Formats

24w46a1.21.4-pre1
Data pack format60.060.0
Resource pack format45.046.0 moved
Data version41784179

Registries

No registry gained, lost or changed an entry.

The official notes

Read the 1.21.4 Pre-Release 1 article on minecraft.net.

That article's technical changes are grouped under these headings — open it for the detail:

Minecraft Wiki page for 1.21.4-pre1.

In the journal

← 24w46a · All builds · 1.21.4-pre2 →

Sources