Download the current runtime.

Build 48.4 is a signed Aurora Nexus hotfix. It is published for real testing, not labelled STABLE. Verify the checksum and the signature before first boot.

Minecraft26.2

Java25

EngineAurora

UpstreamPaper

LicenceGPL-3.0-only

ChannelREL · not STABLE

v26.2-r48.4 · Aurora NexusPublished · not STABLE

26.2Build 48.4 · 24 Oct 2026

The full release jar. Java 25, Minecraft 26.2, Aurora Engine. First boot fetches the externalized libraries and the Mojang server jar, then verifies them.

Download SourbyCraft-26.2-REL.jar SHA-256 file GitHub release

SHA-256 · SourbyCraft-26.2-REL.jar

e3aeba557c7a77afebd796f42f1545a393ed7bf5f2df292e74b180c17acaf347 Matches release manifest

Verify, then run.

verify · macOS / Linux

# 1. Download both files into the same directory.
# 2. Verify the jar before it touches a server.
sha256sum -c SourbyCraft-26.2-REL.jar.sha256

# macOS
shasum -a 256 -c SourbyCraft-26.2-REL.jar.sha256

run · Java 25

java -version   # must report Java 25
java -Xmx4G -jar SourbyCraft-26.2-REL.jar --nogui

Not STABLEBuild 48.4 is a published release, not a stability guarantee. Read the release notes and the compatibility boundary before putting it in front of players.

Everything that ships with the jar.

SourbyCraft-26.2-REL.jar 36 MB · runtime

SHA-256 checksum 91 B

Ed25519 signature 64 B

Release manifest 315 B · policy

Manifest signature 64 B

CycloneDX SBOM 89 KB

The manifest is valid until 21 Jan 2027. Signature verification instructions and the public key location are in the release notes.

Four steps, one boundary.

Verify the download

Compare the checksum with the signed manifest before the jar is executed.

Use Java 25

Older Java runtimes will fail before the server reaches the first tick.

Boot once with network access

The launcher downloads externalized libraries and the Mojang server jar; subsequent starts reuse the local cache.

Read the compatibility boundary

Region threading changes plugin timing. Check the bridge and API notes before installing existing plugins.

Full install notes Understand Aurora

docker-compose.yml · reference

services:
  sourbycraft:
    image: eclipse-temurin:25-jre
    command:
      - java
      - -Xmx4G
      - -jar
      - /srv/server.jar
      - --nogui
    ports:
      - "25565:25565"
    volumes:
      - ./data:/srv
      - ./server.jar:/srv/server.jar:ro
    restart: unless-stopped

Reference only. Copy the release jar to server.jar next to the compose file, pin the Java image, keep the world volume persistent, and do not expose RCON without a firewall rule.