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<Subnautica2>/
├── BepInEx/
│   ├── core/
│   ├── plugins/
│   │   └── DeepSynergy/
│   │       ├── DeepSynergy.dll
│   │       └── libs/
│   └── config/
│       ├── synergy_profile.json
│       └── session_config.xml
└── Subnautica2.exe

{
  "session_name": "Ocean Explorers",
  "max_players": 4,
  "difficulty_scale": "adaptive",
  "resource_multiplier": 1.0,
  "oxygen_consumption": 1.0,
  "creature_spawn_divider": 1,
  "enable_pvp": false,
  "friendly_fire": false,
  "shared_blueprints": true,
  "ping_locations_shared": true,
  "time_of_day_sync": "host",
  "voice_chat_integration": "none",
  "network": {
    "port": 25000,
    "max_latency_ms": 200,
    "reconnect_timeout_s": 30,
    "stun_server": "stun:stun.l.google.com:19302"
  },
  "api_integration": {
    "openai": {
      "enabled": false,
      "api_key_env": "OPENAI_API_KEY",
      "model": "gpt-4",
      "role": "narrator"
    },
    "claude": {
      "enabled": false,
      "api_key_env": "ANTHROPIC_API_KEY",
      "model": "claude-3-sonnet-20240229",
      "role": "lore_engine"
    }
  },
  "locale": "en-US",
  "debug_mode": false
}

{
  "network": {
    "port": 25000,
    "max_latency_ms": 200,
    "reconnect_timeout_s": 30,
    "stun_server": "stun:stun.l.google.com:19302",
    "use_relay": false,
    "encryption": true
  }
}

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using BepInEx;
using BepInEx.IL2CPP;
using HarmonyLib;
using UnityEngine;

namespace DeepSynergy
{
    [BepInPlugin(GUID, Name, Version)]
    public class DeepSynergyPlugin : BasePlugin
    {
        public const string GUID = "com.deepsynergy.subnautica2";
        public const string Name = "Deep Synergy Multiplayer";
        public const string Version = "1.0.0";

        private SessionManager _sessionManager;
        private StateSync _stateSync;

        public override void Load()
        {
            Log.LogInfo("Loading Deep Synergy...");
            
            // Load configuration
            var config = ConfigLoader.LoadProfile();
            
            // Initialize core systems
            _sessionManager = new SessionManager(config);
            _stateSync = new StateSync(config);
            
            // Apply Harmony patches
            var harmony = new Harmony(GUID);
            harmony.PatchAll();
            
            Log.LogInfo("Deep Synergy loaded successfully");
        }
    }
}

using DeepSynergy.Core;
using System;

namespace DeepSynergy.Session
{
    public class SessionManager
    {
        private SynergyConfig _config;
        private WebRTCChannel _channel;

        public SessionManager(SynergyConfig config)
        {
            _config = config;
        }

        public string CreateSession()
        {
            var sessionCode = GenerateSessionCode();
            _channel = new WebRTCChannel(_config.Network);
            
            _channel.OnPeerConnected += HandlePeerConnect;
            _channel.OnDataReceived += HandleStateUpdate;
            
            _channel.StartHost(_config.Network.Port);
            
            Console.WriteLine($"Session created: {sessionCode}");
            return sessionCode;
        }

        public bool JoinSession(string sessionCode)
        {
            _channel = new WebRTCChannel(_config.Network);
            
            _channel.OnConnected += () => {
                Console.WriteLine("Connected to session");
                SyncInitialState();
            };
            
            return _channel.Connect(sessionCode);
        }

        private void HandleStateUpdate(byte[] data)
        {
            var update = StateUpdate.Deserialize(data);
            _stateSync.ApplyUpdate(update);
        }

        private string GenerateSessionCode()
        {
            var guid = Guid.NewGuid();
            return $"{guid.ToString().Substring(0, 4).ToUpper()}-" +
                   $"{guid.ToString().Substring(4, 4).ToUpper()}-" +
                   $"{guid.ToString().Substring(8, 4).ToUpper()}";
        }
    }
}

using System.Security.Cryptography;
using System.Text;

namespace DeepSynergy.Sync
{
    public class InventorySync
    {
        private Dictionary<string, InventoryState> _playerInventories;
        
        public string ComputeMerkleRoot(InventoryState inventory)
        {
            var hashes = new List<string>();
            
            foreach (var item in inventory.Items.OrderBy(i => i.Id))
            {
                var itemData = $"{item.Id}:{item.Quantity}:{item.Metadata}";
                hashes.Add(ComputeHash(itemData));
            }
            
            return BuildMerkleTree(hashes);
        }

        public void SyncInventory(string playerId, InventoryState state)
        {
            var localHash = ComputeMerkleRoot(state);
            var remoteHash = RequestRemoteHash(playerId);
            
            if (localHash != remoteHash)
            {
                // Resolve conflict using timestamp authority
                var resolvedState = ConflictResolver.Resolve(
                    state, 
                    GetRemoteState(playerId)
                );
                
                ApplyInventoryState(playerId, resolvedState);
                BroadcastUpdate(playerId, resolvedState);
            }
        }

        private string ComputeHash(string data)
        {
            using (var sha256 = SHA256.Create())
            {
                var bytes = Encoding.UTF8.GetBytes(data);
                var hash = sha256.ComputeHash(bytes);
                return BitConverter.ToString(hash).Replace("-", "");
            }
        }

        private string BuildMerkleTree(List<string> hashes)
        {
            if (hashes.Count == 1) return hashes[0];
            
            var newLevel = new List<string>();
            for (int i = 0; i < hashes.Count; i += 2)
            {
                var combined = i + 1 < hashes.Count 
                    ? hashes[i] + hashes[i + 1] 
                    : hashes[i];
                newLevel.Add(ComputeHash(combined));
            }
            
            return BuildMerkleTree(newLevel);
        }
    }
}

using System.Net.Http;
using System.Text.Json;
using System.Threading.Tasks;

namespace DeepSynergy.AI
{
    public class NarrativeEngine
    {
        private readonly HttpClient _client;
        private readonly string _apiKey;
        private readonly string _model;

        public NarrativeEngine(string apiKeyEnv, string model)
        {
            _apiKey = Environment.GetEnvironmentVariable(apiKeyEnv);
            _model = model;
            _client = new HttpClient();
        }

        public async Task<string> GenerateNarration(string context)
        {
            if (string.IsNullOrEmpty(_apiKey))
            {
                return "API key not configured";
            }

            var request = new
            {
                model = _model,
                messages = new[]
                {
                    new { role = "system", content = "You are a narrator for a co-op ocean survival game. Generate brief, atmospheric journal entries based on player actions." },
                    new { role = "user", content = $"Context: {context}" }
                },
                max_tokens = 150,
                temperature = 0.7
            };

            _client.DefaultRequestHeaders.Clear();
            _client.DefaultRequestHeaders.Add("Authorization", $"Bearer {_apiKey}");

            var response = await _client.PostAsJsonAsync(
                "https://api.openai.com/v1/chat/completions", 
                request
            );

            var result = await response.Content.ReadAsStringAsync();
            var json = JsonDocument.Parse(result);
            
            return json.RootElement
                .GetProperty("choices")[0]
                .GetProperty("message")
                .GetProperty("content")
                .GetString();
        }
    }
}

namespace DeepSynergy.Scaling
{
    public class DifficultyScaler
    {
        private SynergyConfig _config;
        private int _playerCount;

        public void UpdatePlayerCount(int count)
        {
            _playerCount = count;
            
            if (_config.DifficultyScale == "adaptive")
            {
                AdjustGameParameters();
            }
        }

        private void AdjustGameParameters()
        {
            // Scale creature spawns inversely with player count
            var creatureMultiplier = 1.0f / (_playerCount * _config.CreatureSpawnDivider);
            Game.CreatureSpawner.SetGlobalMultiplier(creatureMultiplier);
            
            // Scale resource availability
            var resourceMultiplier = _config.ResourceMultiplier * 
                Mathf.Lerp(1.0f, 1.5f, (_playerCount - 1) / 7f);
            Game.ResourceManager.SetMultiplier(resourceMultiplier);
            
            // Adjust oxygen consumption (more players = slightly more efficient)
            var oxygenEfficiency = _config.OxygenConsumption * 
                Mathf.Lerp(1.0f, 0.85f, (_playerCount - 1) / 7f);
            Game.Player.SetOxygenConsumption(oxygenEfficiency);
        }
    }
}

// Host workflow
var session = new SessionManager(config);
var sessionCode = session.CreateSession();
Console.WriteLine($"Share code: {sessionCode}");

// Client workflow
var session = new SessionManager(config);
session.JoinSession("9B2A-4C7D-E8F1");

// Graceful disconnect
session.Disconnect();

// Send state update
var update = new StateUpdate
{
    Timestamp = DateTime.UtcNow.Ticks,
    PlayerId = localPlayerId,
    Type = UpdateType.InventoryChange,
    Data = SerializeInventory()
};
_channel.Broadcast(update.Serialize());

// Receive and apply update
_channel.OnDataReceived += (data) => {
    var update = StateUpdate.Deserialize(data);
    if (ConflictResolver.ShouldApply(update))
    {
        ApplyStateUpdate(update);
    }
};

try
{
    session.JoinSession(sessionCode);
}
catch (SessionNotFoundException)
{
    Console.WriteLine("Session not found. Check code.");
}
catch (NetworkTimeoutException)
{
    Console.WriteLine("Connection timeout. Check firewall/NAT.");
}
catch (VersionMismatchException ex)
{
    Console.WriteLine($"Mod version mismatch: {ex.Message}");
}

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Check for conflicting mods:
```bash

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Check config:
```json
{
  "api_integration": {
    "openai": {
      "enabled": true,
      "api_key_env": "OPENAI_API_KEY",  // Must match env var name
      "model": "gpt-4"
    }
  }
}

{
  "creature_spawn_divider": 2  // Halves creature count
}

StateSync.SetUpdateInterval(100);  // ms, default 50

{
  "api_integration": {
    "openai": { "enabled": false },
    "claude": { "enabled": false }
  }
}

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// Override default scaling in plugin
public class CustomScaler : DifficultyScaler
{
    protected override float CalculateCreatureMultiplier(int players)
    {
        // Custom formula: exponential reduction
        return Mathf.Pow(0.8f, players - 1);
    }
}

// Implement host migration on disconnect
_channel.OnHostDisconnected += () => {
    var survivingPeer = _peers.OrderBy(p => p.Latency).First();
    if (survivingPeer.Id == localPlayerId)
    {
        PromoteToHost();
    }
};

private void PromoteToHost()
{
    _channel.BecomeHost();
    BroadcastFullState();
}

// Sync blueprint unlocks
Game.BlueprintManager.OnUnlock += (blueprint) => {
    if (_config.SharedBlueprints)
    {
        var update = new StateUpdate
        {
            Type = UpdateType.BlueprintUnlock,
            Data = Encoding.UTF8.GetBytes(blueprint.Id)
        };
        _channel.Broadcast(update.Serialize());
    }
};

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