Project-M/Assets/_Project/Scripts/Simulation/GameBootstrap.cs

using Unity.Entities;
using Unity.NetCode;
using UnityEngine.Scripting;

namespace ProjectM.Simulation
{
    /// <summary>
    /// Custom Netcode for Entities bootstrap. Subclassing <see cref="ClientServerBootstrap"/>
    /// gives an explicit hook to customize world creation, tick rate, and auto-connect.
    /// For now it reproduces the default behavior: create separate client and server worlds
    /// based on the Multiplayer PlayMode Tools settings, without auto-connecting.
    /// </summary>
    [Preserve]
    public class GameBootstrap : ClientServerBootstrap
    {
        public override bool Initialize(string defaultWorldName)
        {
            // 0 = do not auto-connect; worlds are still created. Set a port later to auto-connect.
            AutoConnectPort = 0;
            CreateDefaultClientServerWorlds();
            return true;
        }
    }
}