- start.sh: downloads portable Java 17 + Mojang 1.6.4 server + Legacy
  Fabric 0.19.3 + libraries + BTWCE 3.1.0 mod on first run, then launches
  headless with nogui
- bootstrap.py: idempotent dep downloader (sha1-verified)
- rebuild-launch-jar.py: builds a small manifest-only jar with folded
  Class-Path (Java 17 enforces 72-byte manifest line limit strictly)
- console.sh / stop.sh / backup.sh: helpers
- server.properties: sane defaults (difficulty 2, allow-flight, RCON)
- mods/btwce-3.1.0.jar: upstream Modrinth release (CC-BY-4.0)
- README.md, LICENSE (MIT)