From f1a64590d7780068e54de50e367e959e5ed0cc4a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn?= <steinhagen.bjoern@gmail.com>
Date: Sat, 25 Oct 2025 11:59:39 +0200
Subject: [PATCH] chore(models): adds RootCollection

---
 .../Models/Collections/RootCollection.cs      | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 src/Speckle.Sdk/Models/Collections/RootCollection.cs

diff --git a/src/Speckle.Sdk/Models/Collections/RootCollection.cs b/src/Speckle.Sdk/Models/Collections/RootCollection.cs
new file mode 100644
index 00000000..6c9d05d8
--- /dev/null
+++ b/src/Speckle.Sdk/Models/Collections/RootCollection.cs
@@ -0,0 +1,27 @@
+namespace Speckle.Sdk.Models.Collections;
+
+/// <summary>
+/// Root collection that represents the top-level commit object.
+/// Extends Collection to include model-wide properties that apply to the entire model.
+/// </summary>
+[SpeckleType("Speckle.Core.Models.Collections.RootCollection")]
+public class RootCollection : Collection
+{
+  /// <summary>
+  /// Constructor for a root collection.
+  /// </summary>
+  /// <param name="name">The human-readable name of this root collection</param>
+  public RootCollection(string name) : base(name) { }
+
+  /// <summary>
+  /// Model-wide properties that apply to the entire model.
+  /// </summary>
+  /// <remarks>
+  /// These are intended for model-level metadata such as total area, project information, or analysis results.
+  /// </remarks>
+  public Dictionary<string, object?>? properties
+  {
+    get => this["properties"] as Dictionary<string, object?>;
+    set => this["properties"] = value;
+  }
+}