Changelog

1.0.0 — Initial Release

Core

• Launch and manage a second Fabric server as a child JVM process from a single mod
• Automatic role detection — both servers use the same JAR (primary / secondary via system property)
• Graceful shutdown of the secondary when the primary stops or crashes
• Primary PID monitoring on the secondary side — secondary exits automatically if the primary dies

Process Management

• /2core start / stop / restart — control the secondary server in-game or from console
• /2core status — shows running state, uptime, PID, IPC connection, and current config
• /2core cmd <command> — send a command to the secondary server's stdin
• /2core console on|off — toggle live relay of secondary console output to primary
• auto_start — optionally start the secondary automatically on primary startup
• copy_mode (none / launcher / full) — automatic copying of server files into 2core/
• Secondary console output always saved to 2core/logs/console.log

Cross-Server Sync

• /listother — show online players on the other server, available to all players on both sides
• Chat messages, join/leave notifications, and death messages relayed between servers in real time
• /2core chatlink on|off — toggle sync without restarting
• Fully configurable message formats with %player%, %message% placeholders and & color codes

Configuration

• Config file auto-created at 2core/2core.properties on first start
• /2core set <key> <value> — change any config value live without editing the file
• Secondary reads only its relevant config keys — cannot accidentally trigger server launch logic
• IPC port auto-assigned if not set (ipc_port=0)