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CLAUDE.md

@@ -18,6 +18,13 @@ The plugin **never directly references TOU Mira types**. All access is via refle
 ### Harmony Patching Strategy
 Uses `[HarmonyPriority(Priority.Low)]` on the `AmongUsClient.OnGameEnd` patch to ensure TOU Mira's `BuildEndGameData()` runs first and populates `EndGameData.PlayerRecords` before the export begins.
 
+### Game Duration Tracking
+The plugin tracks actual gameplay duration (not lobby time) using `GameStartTimePatch`:
+- Patches `ShipStatus.Begin` to capture when the game round starts
+- Stores start time as `Time.time` when gameplay begins
+- Calculates duration as difference between game end time and start time
+- Resets on each game to ensure accurate per-game timing
+
 ### Async Export Pattern
 Export runs in a fire-and-forget Task.Run() to avoid blocking the game UI. The entire export process (reflection, data transformation, API call) happens asynchronously.
 
@@ -63,20 +70,27 @@ If the `AmongUs` environment variable is set, the DLL auto-copies to `$(AmongUs)
 1. `TownOfUsStatsPlugin.Load()` - BepInEx entry point
 2. `TouMiraReflectionBridge.Initialize()` - Find TOU Mira assembly, cache reflection metadata
 3. `VersionCompatibility.CheckVersion()` - Verify TOU Mira version compatibility
-4. `Harmony.PatchAll()` - Apply patches (EndGameExportPatch)
+4. `Harmony.PatchAll()` - Apply patches (EndGameExportPatch, GameStartTimePatch)
+
+### Game Start Flow
+1. **ShipStatus.Begin** fires (game round starts, gameplay begins)
+2. **GameStartTimePatch.OnShipStatusBegin** runs - records `Time.time` as game start time
 
 ### Export Flow (Game End)
 1. **AmongUsClient.OnGameEnd** fires (game ends)
-2. **TOU Mira's patch** runs (High priority) - populates EndGameData.PlayerRecords
+2. **GameStartTimePatch.OnGameEndPrefix** runs - logs game duration
-3. **EndGameExportPatch.Postfix** runs (Low priority) - starts export
+3. **TOU Mira's patch** runs (High priority) - populates EndGameData.PlayerRecords
+4. **EndGameExportPatch.Postfix** runs (Low priority) - starts export
    - Checks for Hide & Seek mode (skip if true)
    - Fires Task.Run() with `StatsExporter.ExportGameStatsAsync()`
-4. **StatsExporter.ExportGameStatsAsync()**
+5. **StatsExporter.ExportGameStatsAsync()**
    - Reads `ApiSet.ini` config
    - Calls reflection bridge methods to collect data
    - Transforms data via `DataTransformer.TransformToExportFormat()`
+     - Uses `GameStartTimePatch.GetGameDuration()` for accurate game time
    - Saves local backup if enabled
    - POSTs to API via `ApiClient.SendToApiAsync()`
+6. **GameStartTimePatch.OnGameEndPostfix** runs - clears game start time for next game
 
 ### Key Reflection Patterns
 
@@ -164,7 +178,7 @@ GameStatsData
 │   ├── Timestamp (UTC)
 │   ├── LobbyCode (e.g., "ABCDEF")
 │   ├── GameMode (Normal/HideNSeek)
-│   ├── Duration (seconds)
+│   ├── Duration (seconds, actual gameplay time from intro end to game end)
 │   └── Map (string)
 ├── Players[] (list)
 │   ├── PlayerId (byte)
@@ -309,3 +323,4 @@ Symbols are extracted **before** text cleaning to preserve information:
 - No compile-time type safety (all reflection is string-based)
 - Breaking changes in TOU Mira require plugin updates
 - Symbol encoding may vary by console/log viewer (e.g., `♥` may display as `ÔÖą` in logs)
+- to memorize

Export/DataTransformer.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
 using TownOfUsStatsExporter.Models;
+using TownOfUsStatsExporter.Patches;
 using UnityEngine;
 
 namespace TownOfUsStatsExporter.Export;
@@ -72,13 +73,16 @@ public static class DataTransformer
 
     private static GameInfoData BuildGameInfo()
     {
+        // Get actual game duration (from intro end to game end) instead of total Time.time
+        var gameDuration = GameStartTimePatch.GetGameDuration();
+
         return new GameInfoData
         {
             GameId = Guid.NewGuid().ToString(),
             Timestamp = DateTime.UtcNow,
             LobbyCode = InnerNet.GameCode.IntToGameName(AmongUsClient.Instance.GameId),
             GameMode = GameOptionsManager.Instance?.CurrentGameOptions?.GameMode.ToString() ?? "Unknown",
-            Duration = Time.time,
+            Duration = gameDuration,
             Map = GetMapName((byte)(GameOptionsManager.Instance?.CurrentGameOptions?.MapId ?? 0)),
         };
     }

Patches/GameStartTimePatch.cs

@@ -0,0 +1,79 @@
+using HarmonyLib;
+using UnityEngine;
+
+namespace TownOfUsStatsExporter.Patches;
+
+/// <summary>
+/// Tracks when the game actually starts (after intro cutscene ends).
+/// This allows calculating actual game duration instead of lobby time.
+/// </summary>
+[HarmonyPatch]
+public static class GameStartTimePatch
+{
+    /// <summary>
+    /// Time when the game started (after intro cutscene), in Unity Time.time format.
+    /// Null if game hasn't started yet.
+    /// </summary>
+    public static float? GameStartTime { get; private set; }
+
+    /// <summary>
+    /// Duration of the last completed game in seconds.
+    /// Set when the game ends, persists until next game starts.
+    /// </summary>
+    public static float LastGameDuration { get; private set; }
+
+    /// <summary>
+    /// Gets the duration of the last completed game in seconds.
+    /// This value is set when the game ends and remains available for async export.
+    /// </summary>
+    public static float GetGameDuration()
+    {
+        return LastGameDuration;
+    }
+
+    /// <summary>
+    /// Patch on ShipStatus.Begin - called when the game round starts.
+    /// This is more reliable than IntroCutscene.OnDestroy as it's always called when gameplay begins.
+    /// </summary>
+    [HarmonyPatch(typeof(ShipStatus), nameof(ShipStatus.Begin))]
+    [HarmonyPostfix]
+    public static void OnShipStatusBegin()
+    {
+        GameStartTime = Time.time;
+        LastGameDuration = 0f; // Reset duration for new game
+        TownOfUsStatsPlugin.Logger.LogInfo($"Game started at Time.time = {GameStartTime.Value:F2}");
+    }
+
+    /// <summary>
+    /// Calculate and store game duration when game ends.
+    /// This runs before the export, so duration is available for async export.
+    /// </summary>
+    [HarmonyPatch(typeof(AmongUsClient), nameof(AmongUsClient.OnGameEnd))]
+    [HarmonyPrefix]
+    public static void OnGameEndPrefix()
+    {
+        if (GameStartTime.HasValue)
+        {
+            LastGameDuration = Time.time - GameStartTime.Value;
+            TownOfUsStatsPlugin.Logger.LogInfo($"Game ended. Duration: {LastGameDuration:F2} seconds ({LastGameDuration / 60:F2} minutes)");
+        }
+        else
+        {
+            LastGameDuration = 0f;
+            TownOfUsStatsPlugin.Logger.LogWarning("Game ended but GameStartTime was not set! Duration will be 0.");
+        }
+    }
+
+    /// <summary>
+    /// Clear game start time after game ends to prepare for next game.
+    /// LastGameDuration is preserved for async export.
+    /// </summary>
+    [HarmonyPatch(typeof(AmongUsClient), nameof(AmongUsClient.OnGameEnd))]
+    [HarmonyPostfix]
+    [HarmonyPriority(Priority.Last)]
+    public static void OnGameEndPostfix()
+    {
+        GameStartTime = null;
+        TownOfUsStatsPlugin.Logger.LogInfo("Game start time cleared (duration preserved for export)");
+    }
+}

TownOfUsStatsExporter.csproj

@@ -8,7 +8,7 @@
         <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
         <Description>Town Of Us Stats Exporter - Standalone plugin for exporting game statistics</Description>
         <RootNamespace>TownOfUsStatsExporter</RootNamespace>
-        <Version>1.0.3</Version>
+        <Version>1.0.4</Version>
         <Authors>ToU Mira Team</Authors>
     </PropertyGroup>
 

TownOfUsStatsPlugin.cs

@@ -32,7 +32,7 @@ public class TownOfUsStatsPlugin : BasePlugin
     /// <summary>
     /// Plugin version.
     /// </summary>
-    public const string PluginVersion = "1.0.3";
+    public const string PluginVersion = "1.0.4";
 
     /// <summary>
     /// Logger instance for the plugin.