chore(unity): 固定Unity CLI Loop本地包并移除UnitySkills依赖

Client/Packages/io.github.hatayama.uloopmcp/Editor/Api/JsonRpcRequestIdentityValidator.cs

@@ -0,0 +1,63 @@
+using System;
+
+namespace io.github.hatayama.uLoopMCP
+{
+    internal static class JsonRpcRequestIdentityValidator
+    {
+        internal const string ServerSessionChangedMessage = "Unity CLI Loop server session changed. Retry the command.";
+
+        public static void Validate(
+            JsonRpcRequestUloopMetadata metadata,
+            string actualProjectRoot,
+            string actualServerSessionId)
+        {
+            if (metadata == null)
+            {
+                return;
+            }
+
+            if (string.IsNullOrWhiteSpace(metadata.ExpectedProjectRoot))
+            {
+                throw new ParameterValidationException("Invalid x-uloop metadata: expectedProjectRoot is required.");
+            }
+
+            if (string.IsNullOrWhiteSpace(metadata.ExpectedServerSessionId))
+            {
+                throw new ParameterValidationException("Invalid x-uloop metadata: expectedServerSessionId is required.");
+            }
+
+            if (string.IsNullOrWhiteSpace(actualProjectRoot))
+            {
+                throw new ParameterValidationException("Fast project validation is unavailable. Restart Unity CLI Loop and retry.");
+            }
+
+            if (string.IsNullOrWhiteSpace(actualServerSessionId))
+            {
+                throw new ParameterValidationException(ServerSessionChangedMessage);
+            }
+
+            if (!string.Equals(metadata.ExpectedProjectRoot, actualProjectRoot, StringComparison.Ordinal))
+            {
+                throw new ParameterValidationException("Connected Unity instance belongs to a different project.");
+            }
+
+            if (!string.Equals(metadata.ExpectedServerSessionId, actualServerSessionId, StringComparison.Ordinal))
+            {
+                throw new ParameterValidationException(ServerSessionChangedMessage);
+            }
+        }
+
+        internal static bool IsExpectedRetryableFailure(ParameterValidationException exception)
+        {
+            if (exception == null)
+            {
+                return false;
+            }
+
+            return string.Equals(
+                exception.Message,
+                ServerSessionChangedMessage,
+                StringComparison.Ordinal);
+        }
+    }
+}