From d02dfb92e92d44c0ae18e0a69148794835aa594d Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Sun, 8 Mar 2026 15:46:02 -0400
Subject: [PATCH] feat: scaffold OpenNest.Mcp project with session state

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 OpenNest.Mcp/NestSession.cs      | 61 ++++++++++++++++++++++++++++++++
 OpenNest.Mcp/OpenNest.Mcp.csproj | 18 ++++++++++
 OpenNest.Mcp/Program.cs          | 15 ++++++++
 OpenNest.sln                     | 14 ++++++++
 4 files changed, 108 insertions(+)
 create mode 100644 OpenNest.Mcp/NestSession.cs
 create mode 100644 OpenNest.Mcp/OpenNest.Mcp.csproj
 create mode 100644 OpenNest.Mcp/Program.cs

diff --git a/OpenNest.Mcp/NestSession.cs b/OpenNest.Mcp/NestSession.cs
new file mode 100644
index 0000000..2dbd993
--- /dev/null
+++ b/OpenNest.Mcp/NestSession.cs
@@ -0,0 +1,61 @@
+using System.Collections.Generic;
+
+namespace OpenNest.Mcp
+{
+    public class NestSession
+    {
+        public Nest Nest { get; set; }
+        public List<Plate> Plates { get; } = new();
+        public List<Drawing> Drawings { get; } = new();
+
+        public Plate GetPlate(int index)
+        {
+            if (Nest != null && index < Nest.Plates.Count)
+                return Nest.Plates[index];
+
+            var adjustedIndex = index - (Nest?.Plates.Count ?? 0);
+            if (adjustedIndex >= 0 && adjustedIndex < Plates.Count)
+                return Plates[adjustedIndex];
+
+            return null;
+        }
+
+        public Drawing GetDrawing(string name)
+        {
+            if (Nest != null)
+            {
+                foreach (var d in Nest.Drawings)
+                {
+                    if (d.Name == name)
+                        return d;
+                }
+            }
+
+            foreach (var d in Drawings)
+            {
+                if (d.Name == name)
+                    return d;
+            }
+
+            return null;
+        }
+
+        public List<Plate> AllPlates()
+        {
+            var all = new List<Plate>();
+            if (Nest != null)
+                all.AddRange(Nest.Plates);
+            all.AddRange(Plates);
+            return all;
+        }
+
+        public List<Drawing> AllDrawings()
+        {
+            var all = new List<Drawing>();
+            if (Nest != null)
+                all.AddRange(Nest.Drawings);
+            all.AddRange(Drawings);
+            return all;
+        }
+    }
+}
diff --git a/OpenNest.Mcp/OpenNest.Mcp.csproj b/OpenNest.Mcp/OpenNest.Mcp.csproj
new file mode 100644
index 0000000..c99afd8
--- /dev/null
+++ b/OpenNest.Mcp/OpenNest.Mcp.csproj
@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <RootNamespace>OpenNest.Mcp</RootNamespace>
+    <AssemblyName>OpenNest.Mcp</AssemblyName>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\OpenNest.Core\OpenNest.Core.csproj" />
+    <ProjectReference Include="..\OpenNest.Engine\OpenNest.Engine.csproj" />
+    <ProjectReference Include="..\OpenNest.IO\OpenNest.IO.csproj" />
+    <PackageReference Include="ModelContextProtocol" Version="0.*-*" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.*" />
+  </ItemGroup>
+
+</Project>
diff --git a/OpenNest.Mcp/Program.cs b/OpenNest.Mcp/Program.cs
new file mode 100644
index 0000000..c924f9f
--- /dev/null
+++ b/OpenNest.Mcp/Program.cs
@@ -0,0 +1,15 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using ModelContextProtocol.Server;
+using OpenNest.Mcp;
+
+var builder = Host.CreateApplicationBuilder(args);
+
+builder.Services.AddSingleton<NestSession>();
+builder.Services
+    .AddMcpServer()
+    .WithStdioServerTransport()
+    .WithToolsFromAssembly(typeof(Program).Assembly);
+
+var app = builder.Build();
+await app.RunAsync();
diff --git a/OpenNest.sln b/OpenNest.sln
index 6972af1..42a267c 100644
--- a/OpenNest.sln
+++ b/OpenNest.sln
@@ -13,6 +13,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenNest.Gpu", "OpenNest.Gp
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenNest.IO", "OpenNest.IO\OpenNest.IO.csproj", "{1EFCF5FB-7ADE-4044-B55D-60F6F75C3A8B}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenNest.Mcp", "OpenNest.Mcp\OpenNest.Mcp.csproj", "{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -83,6 +85,18 @@ Global
 		{1EFCF5FB-7ADE-4044-B55D-60F6F75C3A8B}.Release|x64.Build.0 = Release|Any CPU
 		{1EFCF5FB-7ADE-4044-B55D-60F6F75C3A8B}.Release|x86.ActiveCfg = Release|Any CPU
 		{1EFCF5FB-7ADE-4044-B55D-60F6F75C3A8B}.Release|x86.Build.0 = Release|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Debug|x64.Build.0 = Debug|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Debug|x86.Build.0 = Debug|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Release|Any CPU.Build.0 = Release|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Release|x64.ActiveCfg = Release|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Release|x64.Build.0 = Release|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Release|x86.ActiveCfg = Release|Any CPU
+		{61CC6F65-8B70-408A-B49A-F4E5F34FFD01}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE