Antigravity 초안

ExcelKv.Core/SchemaRegistry.cs

@@ -0,0 +1,23 @@
+using System.Collections.Generic;
+
+namespace ExcelKv.Core;
+
+// --- Schema Middleware ---
+public class SchemaRegistry
+{
+    private Dictionary<string, HashSet<string>> _knownSchemas = new();
+
+    public void RegisterSchema(string namespaceKey, List<string> newColumns)
+    {
+        if (!_knownSchemas.ContainsKey(namespaceKey))
+        {
+            _knownSchemas[namespaceKey] = new HashSet<string>();
+            foreach (var col in newColumns) _knownSchemas[namespaceKey].Add(col);
+        }
+        else
+        {
+            var existing = _knownSchemas[namespaceKey];
+            foreach (var col in newColumns) if (!existing.Contains(col)) existing.Add(col);
+        }
+    }
+}