diff --git a/AI/CHANGELOG.md b/AI/CHANGELOG.md
index 9dcfd56..f63936f 100644
--- a/AI/CHANGELOG.md
+++ b/AI/CHANGELOG.md
@@ -50,6 +50,13 @@
 - **Impact:** Lesson copy stays on the side panels; timing feedback looks like the level.
 - **Refs:** `TutorialController.cs`, `TreeRhythmController.cs`, `Assets/Scenes/Tutorial.unity`
 
+### Changed — Results QR link carries grade and score
+- **Scope:** component:ResultScreen · integration
+- **What:** The share link now encodes four params (`?start=…&placed=…&grade=…&score=…`). `TreeRunTracker.BuildViewerUrl` takes the final `Grade` and score, `TreeResultQrDisplay.PrepareResultQrCode` takes the run's `RhythmScoreTracker`, and both new query keys are editable on `TreeShareConfig`. Default viewer path moves from `/view` to `/results`.
+- **Why:** The results web page needs the letter grade and numeric score from the link itself, not only the BST sequences.
+- **Impact:** `PrepareResultQrCode` and `BuildViewerUrl` gained parameters; the result screen passes the score tracker it already displays. A missing tracker logs an error and shows the QR fallback instead of an incomplete link. Set `_viewerBaseUrl` per environment on the config asset.
+- **Refs:** `TreeShareConfig.cs`, `TreeRunTracker.cs`, `TreeResultQrDisplay.cs`, `ResultScreenController.cs`, `TreeShareConfig.asset`
+
 ### Fixed — Player-side synthwave reacts to the song again in VS Bot / 2P
 - **Scope:** component:PlayerVsBot
 - **What:** `TwoPlayerGameCoordinator` now pulses P1's synthwave floor from P1 `OnBeat` (P2 already had this) and retargets the shared `AudioFFTAnalyzer` to P1's playing `AudioSource`. P2 `PlaySync` never starts a clip, so the analyzer had been listening to a silent source — hills stayed flat on the human side while the bot side still kicked from its beat wire.
diff --git a/Assets/Integration/TreeResultQrDisplay.cs b/Assets/Integration/TreeResultQrDisplay.cs
index 8902ee6..5218301 100644
--- a/Assets/Integration/TreeResultQrDisplay.cs
+++ b/Assets/Integration/TreeResultQrDisplay.cs
@@ -59,8 +59,12 @@ public void SetTracker(TreeRunTracker tracker)
      * assigns it to the results-screen RawImage. Safe to call once per run;
      * subsequent calls for the same run are no-ops until <see cref="ClearQr"/>.
      * </summary>
+     * <param name="score">
+     * Same tracker the result screen displays; supplies the grade and total
+     * score encoded in the link.
+     * </param>
      */
-    public void PrepareResultQrCode()
+    public void PrepareResultQrCode(RhythmScoreTracker score)
     {
         if (_preparedForCurrentRun)
             return;
@@ -72,6 +76,15 @@ public void PrepareResultQrCode()
             return;
         }
 
+        if (score == null)
+        {
+            Debug.LogError("[TreeResultQrDisplay] Missing RhythmScoreTracker — cannot encode grade and score.");
+            _tracker.FinishLevel();
+            ShowFallback();
+            _preparedForCurrentRun = true;
+            return;
+        }
+
         if (_qrRawImage == null)
         {
             Debug.LogError("[TreeResultQrDisplay] Missing QR RawImage reference.");
@@ -81,7 +94,7 @@ public void PrepareResultQrCode()
         }
 
         _tracker.FinishLevel();
-        _lastUrl = _tracker.BuildViewerUrl();
+        _lastUrl = _tracker.BuildViewerUrl(score.CurrentGrade, score.TotalScore);
         if (string.IsNullOrEmpty(_lastUrl))
         {
             Debug.LogError("[TreeResultQrDisplay] Viewer URL was empty (check TreeShareConfig).");
diff --git a/Assets/Integration/TreeRunTracker.cs b/Assets/Integration/TreeRunTracker.cs
index 49e04f5..c0f73ac 100644
--- a/Assets/Integration/TreeRunTracker.cs
+++ b/Assets/Integration/TreeRunTracker.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using UnityEngine;
 
 /** <summary>
@@ -7,7 +8,8 @@
  *
  * Holds the starting tree's original insertion order plus every value the
  * player successfully places, in placement order. Used by
- * <see cref="TreeResultQrDisplay"/> to build a seemytree viewer URL.
+ * <see cref="TreeResultQrDisplay"/> to build a results viewer URL of the form
+ * <c>?start=…&amp;placed=…&amp;grade=…&amp;score=…</c>.
  *
  * Attach beside <see cref="TreeRhythmController"/> on each GameController.
  * Does not use DontDestroyOnLoad — lives for the GameScene level only.
@@ -123,12 +125,14 @@ public void ResetTracking()
     }
 
     /** <summary>
-     * Builds the seemytree viewer URL for the current run.
+     * Builds the results viewer URL for the current run.
      * Empty placement lists are valid and encode as <c>placed=</c>.
      * Base URL and query names come from <see cref="TreeShareConfig"/>.
      * </summary>
+     * <param name="grade">Final letter grade shown on the result screen.</param>
+     * <param name="score">Final score from <see cref="RhythmScoreTracker.TotalScore"/>.</param>
      */
-    public string BuildViewerUrl()
+    public string BuildViewerUrl(Grade grade, long score)
     {
         if (_shareConfig == null)
         {
@@ -141,12 +145,17 @@ public string BuildViewerUrl()
 
         string startEncoded = Uri.EscapeDataString(startJoined);
         string placedEncoded = Uri.EscapeDataString(placedJoined);
+        string gradeEncoded = Uri.EscapeDataString(grade.ToString());
+        string scoreEncoded = Uri.EscapeDataString(score.ToString(CultureInfo.InvariantCulture));
 
         string baseUrl = _shareConfig.ViewerBaseUrl;
         string startKey = _shareConfig.StartParamName;
         string placedKey = _shareConfig.PlacedParamName;
+        string gradeKey = _shareConfig.GradeParamName;
+        string scoreKey = _shareConfig.ScoreParamName;
 
-        return $"{baseUrl}?{startKey}={startEncoded}&{placedKey}={placedEncoded}";
+        return $"{baseUrl}?{startKey}={startEncoded}&{placedKey}={placedEncoded}" +
+               $"&{gradeKey}={gradeEncoded}&{scoreKey}={scoreEncoded}";
     }
 
     #endregion
diff --git a/Assets/Integration/TreeShareConfig.cs b/Assets/Integration/TreeShareConfig.cs
index 3c31a9b..f00e03e 100644
--- a/Assets/Integration/TreeShareConfig.cs
+++ b/Assets/Integration/TreeShareConfig.cs
@@ -8,9 +8,12 @@
 [CreateAssetMenu(menuName = "Treeformance/TreeShareConfig", fileName = "TreeShareConfig")]
 public class TreeShareConfig : ScriptableObject
 {
+    /** <summary>Used when the asset leaves <c>_viewerBaseUrl</c> blank.</summary> */
+    private const string DefaultViewerBaseUrl = "https://seemytree.netlify.app/results";
+
     [Header("Viewer")]
-    [Tooltip("Base URL for the tree viewer (no query string). Example: https://seemytree.netlify.app/view")]
-    [SerializeField] private string _viewerBaseUrl = "https://seemytree.netlify.app/view";
+    [Tooltip("Base URL for the results viewer (no query string). Example: https://seemytree.netlify.app/results")]
+    [SerializeField] private string _viewerBaseUrl = DefaultViewerBaseUrl;
 
     [Header("Query Parameter Names")]
     [Tooltip("Query key for the starting BST insertion order.")]
@@ -19,10 +22,16 @@ public class TreeShareConfig : ScriptableObject
     [Tooltip("Query key for successful player placements in order.")]
     [SerializeField] private string _placedParamName = "placed";
 
-    /** <summary>Host + path used before <c>?start=…&amp;placed=…</c>.</summary> */
+    [Tooltip("Query key for the final letter grade (SS, S, A, B, C, D, F).")]
+    [SerializeField] private string _gradeParamName = "grade";
+
+    [Tooltip("Query key for the final numeric score.")]
+    [SerializeField] private string _scoreParamName = "score";
+
+    /** <summary>Host + path used before <c>?start=…&amp;placed=…&amp;grade=…&amp;score=…</c>.</summary> */
     public string ViewerBaseUrl =>
         string.IsNullOrWhiteSpace(_viewerBaseUrl)
-            ? "https://seemytree.netlify.app/view"
+            ? DefaultViewerBaseUrl
             : _viewerBaseUrl.TrimEnd('/');
 
     /** <summary>Query parameter name for the starting insertion sequence.</summary> */
@@ -32,4 +41,12 @@ public class TreeShareConfig : ScriptableObject
     /** <summary>Query parameter name for successful placements.</summary> */
     public string PlacedParamName =>
         string.IsNullOrWhiteSpace(_placedParamName) ? "placed" : _placedParamName;
+
+    /** <summary>Query parameter name for the final letter grade.</summary> */
+    public string GradeParamName =>
+        string.IsNullOrWhiteSpace(_gradeParamName) ? "grade" : _gradeParamName;
+
+    /** <summary>Query parameter name for the final numeric score.</summary> */
+    public string ScoreParamName =>
+        string.IsNullOrWhiteSpace(_scoreParamName) ? "score" : _scoreParamName;
 }
diff --git a/Assets/ScriptableObjects/Configs/TreeShareConfig.asset b/Assets/ScriptableObjects/Configs/TreeShareConfig.asset
index 968359e..2bcd262 100644
--- a/Assets/ScriptableObjects/Configs/TreeShareConfig.asset
+++ b/Assets/ScriptableObjects/Configs/TreeShareConfig.asset
@@ -12,6 +12,8 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 12b30bbd212e049eb9d2fa93b78b1a36, type: 3}
   m_Name: TreeShareConfig
   m_EditorClassIdentifier: 
-  _viewerBaseUrl: https://seemytree.netlify.app/view
+  _viewerBaseUrl: https://seemytree.netlify.app/results
   _startParamName: start
   _placedParamName: placed
+  _gradeParamName: grade
+  _scoreParamName: score
diff --git a/Assets/UI/Style1/ResultScreenController.cs b/Assets/UI/Style1/ResultScreenController.cs
index 84782e3..2267dc1 100644
--- a/Assets/UI/Style1/ResultScreenController.cs
+++ b/Assets/UI/Style1/ResultScreenController.cs
@@ -297,7 +297,7 @@ public async UniTask ShowAsync(RhythmScoreTracker score, IMenuInputProvider inpu
             _treeQrDisplay = GetComponent<TreeResultQrDisplay>();
         try
         {
-            _treeQrDisplay?.PrepareResultQrCode();
+            _treeQrDisplay?.PrepareResultQrCode(score);
         }
         catch (Exception ex)
         {