Initial commit: AIGame Unity client with URP, HybridCLR, YooAsset and tooling.

Co-authored-by: Cursor <cursoragent@cursor.com>

AIClient/Packages/com.unity.pipeline/Tests~/Runtime/AttachByPathFixture.cs

@@ -0,0 +1,22 @@
+using UnityEngine;
+
+namespace Unity.Pipeline.Tests.Runtime
+{
+    /// <summary>
+    /// CLI-224 fixture: an already-compiled MonoBehaviour used to exercise attach_script's --script
+    /// (asset path) addressing — the command resolves the backing class from the .cs asset via
+    /// MonoScript.GetClass(), so an agent can pass the create_script assetPath directly.
+    ///
+    /// It deliberately lives in the RUNTIME test assembly (Unity.Pipeline.Tests.Runtime, all-platforms),
+    /// NOT the editor test assembly: Unity refuses AddComponent for a MonoBehaviour whose dedicated
+    /// MonoScript belongs to an editor-only assembly, so a real attach must target a runtime script —
+    /// which also matches how agents author scripts under Assets/. The class name matches the file name
+    /// (Unity requires that for a single-type script to be addable).
+    /// </summary>
+    class AttachByPathFixture : MonoBehaviour
+    {
+        [SerializeField] private int m_Value;
+
+        public int Value => m_Value;
+    }
+}