feat: add auto-tab size range fields to CuttingParameters

Add AutoTabMinSize and AutoTabMaxSize properties to enable automatic tab
assignment based on part size. Update CuttingParametersSerializer for
round-trip serialization and add tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

OpenNest.Core/CNC/CuttingStrategy/CuttingParameters.cs

@@ -23,6 +23,9 @@ namespace OpenNest.CNC.CuttingStrategy
 
         public double PierceClearance { get; set; } = 0.0625;
 
+        public double AutoTabMinSize { get; set; }
+        public double AutoTabMaxSize { get; set; }
+
         public Tab TabConfig { get; set; }
         public bool TabsEnabled { get; set; }
 

OpenNest.Tests/CuttingStrategy/CuttingParametersSerializerTests.cs

@@ -0,0 +1,35 @@
+using OpenNest.CNC.CuttingStrategy;
+using OpenNest.Forms;
+
+namespace OpenNest.Tests.CuttingStrategy;
+
+public class CuttingParametersSerializerTests
+{
+    [Fact]
+    public void RoundTrip_PreservesAutoTabFields()
+    {
+        var original = new CuttingParameters
+        {
+            AutoTabMinSize = 0.5,
+            AutoTabMaxSize = 3.0,
+            ExternalLeadIn = new LineLeadIn { Length = 0.25, ApproachAngle = 90 }
+        };
+
+        var json = CuttingParametersSerializer.Serialize(original);
+        var restored = CuttingParametersSerializer.Deserialize(json);
+
+        Assert.Equal(0.5, restored.AutoTabMinSize);
+        Assert.Equal(3.0, restored.AutoTabMaxSize);
+    }
+
+    [Fact]
+    public void Deserialize_MissingAutoTabFields_DefaultsToZero()
+    {
+        var json = "{\"externalLeadIn\":{\"type\":\"None\"},\"externalLeadOut\":{\"type\":\"None\"},\"internalLeadIn\":{\"type\":\"None\"},\"internalLeadOut\":{\"type\":\"None\"},\"arcCircleLeadIn\":{\"type\":\"None\"},\"arcCircleLeadOut\":{\"type\":\"None\"},\"tabsEnabled\":false,\"tabWidth\":0.25,\"pierceClearance\":0.0625}";
+
+        var restored = CuttingParametersSerializer.Deserialize(json);
+
+        Assert.Equal(0.0, restored.AutoTabMinSize);
+        Assert.Equal(0.0, restored.AutoTabMaxSize);
+    }
+}

OpenNest.Tests/OpenNest.Tests.csproj

@@ -27,6 +27,7 @@
     <ProjectReference Include="..\OpenNest.Engine\OpenNest.Engine.csproj" />
     <ProjectReference Include="..\OpenNest.IO\OpenNest.IO.csproj" />
     <ProjectReference Include="..\OpenNest.Posts.Cincinnati\OpenNest.Posts.Cincinnati.csproj" />
+    <ProjectReference Include="..\OpenNest\OpenNest.csproj" />
   </ItemGroup>
 
   <ItemGroup>

OpenNest/Forms/CuttingParametersSerializer.cs

@@ -3,7 +3,7 @@ using System.Text.Json;
 
 namespace OpenNest.Forms
 {
-    internal static class CuttingParametersSerializer
+    public static class CuttingParametersSerializer
     {
         private static readonly JsonSerializerOptions JsonOptions = new()
         {
@@ -23,7 +23,9 @@ namespace OpenNest.Forms
                 ArcCircleLeadOut = ToLeadOutDto(p.ArcCircleLeadOut),
                 TabsEnabled = p.TabsEnabled,
                 TabWidth = p.TabConfig?.Size ?? 0.25,
-                PierceClearance = p.PierceClearance
+                PierceClearance = p.PierceClearance,
+                AutoTabMinSize = p.AutoTabMinSize,
+                AutoTabMaxSize = p.AutoTabMaxSize
             };
             return JsonSerializer.Serialize(dto, JsonOptions);
         }
@@ -44,7 +46,9 @@ namespace OpenNest.Forms
                 ArcCircleLeadOut = FromLeadOutDto(dto.ArcCircleLeadOut),
                 TabsEnabled = dto.TabsEnabled,
                 TabConfig = new NormalTab { Size = dto.TabWidth },
-                PierceClearance = dto.PierceClearance
+                PierceClearance = dto.PierceClearance,
+                AutoTabMinSize = dto.AutoTabMinSize,
+                AutoTabMaxSize = dto.AutoTabMaxSize
             };
         }
 
@@ -109,6 +113,8 @@ namespace OpenNest.Forms
             public bool TabsEnabled { get; set; }
             public double TabWidth { get; set; }
             public double PierceClearance { get; set; }
+            public double AutoTabMinSize { get; set; }
+            public double AutoTabMaxSize { get; set; }
         }
 
         private class LeadInDto