feat: add p-rec-update plant 3d 2026 slice

Plant3D2026/P_Rec_Update/Directory.Build.props

@@ -0,0 +1,13 @@
+<Project>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <LangVersion>latest</LangVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <Deterministic>true</Deterministic>
+    <DebugType>portable</DebugType>
+    <AutoCAD2026ManagedDir Condition="'$(AutoCAD2026ManagedDir)' == '' and '$(Plant3D2026InstallDir)' != ''">$(Plant3D2026InstallDir)</AutoCAD2026ManagedDir>
+    <Plant3D2026ManagedDir Condition="'$(Plant3D2026ManagedDir)' == '' and '$(Plant3D2026InstallDir)' != ''">$(Plant3D2026InstallDir)\PLNT3D</Plant3D2026ManagedDir>
+    <Plant3D2026InstallDir Condition="'$(Plant3D2026InstallDir)' == '' and '$(AutoCAD2026ManagedDir)' != ''">$(AutoCAD2026ManagedDir)</Plant3D2026InstallDir>
+  </PropertyGroup>
+</Project>

Plant3D2026/P_Rec_Update/PRecUpdate2026.sln

@@ -0,0 +1,30 @@
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PRecUpdate.Core", "src\PRecUpdate.Core\PRecUpdate.Core.csproj", "{20000000-0000-0000-0000-000000000001}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PRecUpdate.Plant3D2026", "src\PRecUpdate.Plant3D2026\PRecUpdate.Plant3D2026.csproj", "{20000000-0000-0000-0000-000000000002}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PRecUpdate.Core.Tests", "tests\PRecUpdate.Core.Tests\PRecUpdate.Core.Tests.csproj", "{20000000-0000-0000-0000-000000000003}"
+EndProject
+Global
+  GlobalSection(SolutionConfigurationPlatforms) = preSolution
+    Debug|Any CPU = Debug|Any CPU
+    Release|Any CPU = Release|Any CPU
+  EndGlobalSection
+  GlobalSection(ProjectConfigurationPlatforms) = postSolution
+    {20000000-0000-0000-0000-000000000001}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+    {20000000-0000-0000-0000-000000000001}.Debug|Any CPU.Build.0 = Debug|Any CPU
+    {20000000-0000-0000-0000-000000000001}.Release|Any CPU.ActiveCfg = Release|Any CPU
+    {20000000-0000-0000-0000-000000000001}.Release|Any CPU.Build.0 = Release|Any CPU
+    {20000000-0000-0000-0000-000000000002}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+    {20000000-0000-0000-0000-000000000002}.Debug|Any CPU.Build.0 = Debug|Any CPU
+    {20000000-0000-0000-0000-000000000002}.Release|Any CPU.ActiveCfg = Release|Any CPU
+    {20000000-0000-0000-0000-000000000002}.Release|Any CPU.Build.0 = Release|Any CPU
+    {20000000-0000-0000-0000-000000000003}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+    {20000000-0000-0000-0000-000000000003}.Debug|Any CPU.Build.0 = Debug|Any CPU
+    {20000000-0000-0000-0000-000000000003}.Release|Any CPU.ActiveCfg = Release|Any CPU
+    {20000000-0000-0000-0000-000000000003}.Release|Any CPU.Build.0 = Release|Any CPU
+  EndGlobalSection
+EndGlobal

Plant3D2026/P_Rec_Update/docs/capability-contract.md

@@ -0,0 +1,27 @@
+# P_Rec_Update capability contract
+
+Selected legacy provenance is `\\phpsrv03\NBIM\code\CS\P_Rec_Update\P_Rec_Update\P_Rec_Update.csproj`
+(SHA-256 `1945B572CEE3A308320C164549D38C95C4ED40183347CE341ACD481ED3895BFD`). It is the
+expanded successor to the 2023 `_v2.1` line: it exposes `P-R-UPD`, initializes an
+Update ribbon panel, and presents four selectable operations in `Main_Form`.
+
+| Source-backed operation | Legacy effects | 2026 status |
+|---|---|---|
+| Project NKR | reads project XML and `Settings_NKR.xml`; updates NKR-related project data | DryRun plan and preconditions implemented; Apply blocked |
+| Flanges | reads Piping DataLinks and geometry; may update support/flange-related data | DryRun plan and preconditions implemented; Apply blocked |
+| Fasteners | reads EngineeringItems and may update ItemCode values | DryRun plan and preconditions implemented; Apply blocked |
+| Project Spec | reads spec/project database and may update `LinearWeight` | DryRun plan and preconditions implemented; Apply blocked |
+
+The 2026 entry assembly preserves `P-R-UPD` and adds `P-R-UPD-STATUS` for a
+non-mutating controlled registration check. It is deterministic and refuses an
+Apply-capable plan without an explicit controlled-fixture permit.
+
+## Exact dependency blocker for domain Apply
+
+The legacy code directly binds Plant 2019 DataLinks/SQLite schemas, the external
+`GetComponentGeometryDescription.dll`, package-local `Settings_Flanges.xml` /
+`Settings_NKR.xml`, and a hard-coded legacy template path. No controlled Plant 2026
+fixture containing the required Piping rows, EngineeringItems/spec records and
+expected post-state has been supplied. Therefore domain mutation is intentionally
+not attempted. This is `EXACT_DEPENDENCY_BLOCKER`, not a claim of completed Apply
+parity. Assembly load and command registration remain independently verifiable.

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/PRecUpdate.Core.csproj

@@ -0,0 +1,3 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup><TargetFramework>net8.0</TargetFramework></PropertyGroup>
+</Project>

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/UpdatePlan.cs

@@ -0,0 +1,63 @@
+namespace PRecUpdate.Core;
+
+public enum UpdateOperation
+{
+    ProjectNkr,
+    Flanges,
+    Fasteners,
+    ProjectSpec
+}
+
+public enum UpdateExecutionMode
+{
+    DryRun,
+    Apply
+}
+
+public sealed record UpdateRequest(
+    bool HasActiveDocument,
+    bool HasPlantProject,
+    bool HasPipingProjectPart,
+    IReadOnlySet<UpdateOperation> SelectedOperations,
+    UpdateExecutionMode Mode,
+    bool ControlledFixturePermit);
+
+public sealed record UpdatePlan(
+    bool Accepted,
+    IReadOnlyList<UpdateOperation> Operations,
+    IReadOnlyList<string> Diagnostics,
+    bool MayWriteDrawing,
+    bool MayWriteProjectData);
+
+/// <summary>
+/// Source-backed planner for the four operations exposed by legacy P_Rec_Update.
+/// It intentionally contains no Autodesk calls or file writes, which makes the
+/// safety decision deterministic before a Plant transaction can be opened.
+/// </summary>
+public sealed class UpdatePlanBuilder
+{
+    private static readonly UpdateOperation[] CanonicalOrder =
+    [
+        UpdateOperation.ProjectNkr,
+        UpdateOperation.Flanges,
+        UpdateOperation.Fasteners,
+        UpdateOperation.ProjectSpec
+    ];
+
+    public UpdatePlan Build(UpdateRequest request)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+        var diagnostics = new List<string>();
+        if (!request.HasActiveDocument) diagnostics.Add("ACTIVE_DOCUMENT_REQUIRED");
+        if (!request.HasPlantProject) diagnostics.Add("PLANT_PROJECT_REQUIRED");
+        if (!request.HasPipingProjectPart) diagnostics.Add("PIPING_PROJECT_PART_REQUIRED");
+        if (request.SelectedOperations.Count == 0) diagnostics.Add("UPDATE_OPERATION_REQUIRED");
+        if (request.Mode == UpdateExecutionMode.Apply && !request.ControlledFixturePermit)
+            diagnostics.Add("CONTROLLED_FIXTURE_PERMIT_REQUIRED");
+
+        var ordered = CanonicalOrder.Where(request.SelectedOperations.Contains).ToArray();
+        var accepted = diagnostics.Count == 0;
+        var apply = accepted && request.Mode == UpdateExecutionMode.Apply;
+        return new UpdatePlan(accepted, ordered, diagnostics, apply, apply);
+    }
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/bin/Release/net8.0/PRecUpdate.Core.deps.json

@@ -0,0 +1,23 @@
+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v8.0",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v8.0": {
+      "PRecUpdate.Core/1.0.0": {
+        "runtime": {
+          "PRecUpdate.Core.dll": {}
+        }
+      }
+    }
+  },
+  "libraries": {
+    "PRecUpdate.Core/1.0.0": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    }
+  }
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/PRecUpdate.Core.csproj.nuget.dgspec.json

@@ -0,0 +1,67 @@
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+    "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj": {}
+  },
+  "projects": {
+    "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj": {
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+        "projectPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj",
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+        "configFilePaths": [
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+          "auditMode": "direct"
+        }
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+          "targetAlias": "net8.0",
+          "imports": [
+            "net461",
+            "net462",
+            "net47",
+            "net471",
+            "net472",
+            "net48",
+            "net481"
+          ],
+          "assetTargetFallback": true,
+          "warn": true,
+          "frameworkReferences": {
+            "Microsoft.NETCore.App": {
+              "privateAssets": "all"
+            }
+          },
+          "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\8.0.423/PortableRuntimeIdentifierGraph.json"
+        }
+      }
+    }
+  }
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/PRecUpdate.Core.csproj.nuget.g.props

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <RestoreSuccess Condition=" '$(RestoreSuccess)' == '' ">True</RestoreSuccess>
+    <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
+    <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">$(MSBuildThisFileDirectory)project.assets.json</ProjectAssetsFile>
+    <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">$(UserProfile)\.nuget\packages\</NuGetPackageRoot>
+    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\codex\.nuget\packages\</NuGetPackageFolders>
+    <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
+    <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">6.11.2</NuGetToolVersion>
+  </PropertyGroup>
+  <ItemGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <SourceRoot Include="C:\Users\codex\.nuget\packages\" />
+  </ItemGroup>
+</Project>

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/PRecUpdate.Core.csproj.nuget.g.targets

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" />

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/Release/net8.0/.NETCoreApp,Version=v8.0.AssemblyAttributes.cs

@@ -0,0 +1,4 @@
+// <autogenerated />
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v8.0", FrameworkDisplayName = ".NET 8.0")]

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/Release/net8.0/PRecUpdate.Core.AssemblyInfo.cs

@@ -0,0 +1,22 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("PRecUpdate.Core")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Release")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+c3ac183fffdbd353bfd96d3e55dfff47a661ec3a")]
+[assembly: System.Reflection.AssemblyProductAttribute("PRecUpdate.Core")]
+[assembly: System.Reflection.AssemblyTitleAttribute("PRecUpdate.Core")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// Создано классом WriteCodeFragment MSBuild.
+

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/Release/net8.0/PRecUpdate.Core.AssemblyInfoInputs.cache

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Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/Release/net8.0/PRecUpdate.Core.GeneratedMSBuildEditorConfig.editorconfig

@@ -0,0 +1,13 @@
+is_global = true
+build_property.TargetFramework = net8.0
+build_property.TargetPlatformMinVersion = 
+build_property.UsingMicrosoftNETSdkWeb = 
+build_property.ProjectTypeGuids = 
+build_property.InvariantGlobalization = 
+build_property.PlatformNeutralAssembly = 
+build_property.EnforceExtendedAnalyzerRules = 
+build_property._SupportedPlatformList = Linux,macOS,Windows
+build_property.RootNamespace = PRecUpdate.Core
+build_property.ProjectDir = C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\
+build_property.EnableComHosting = 
+build_property.EnableGeneratedComInterfaceComImportInterop = 

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/Release/net8.0/PRecUpdate.Core.GlobalUsings.g.cs

@@ -0,0 +1,8 @@
+// <auto-generated/>
+global using global::System;
+global using global::System.Collections.Generic;
+global using global::System.IO;
+global using global::System.Linq;
+global using global::System.Net.Http;
+global using global::System.Threading;
+global using global::System.Threading.Tasks;

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/Release/net8.0/PRecUpdate.Core.csproj.CoreCompileInputs.cache

@@ -0,0 +1 @@
+931d275faafb744847074b374703e1d3240d36011f3689a71b6a95fc5a6a0502

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/Release/net8.0/PRecUpdate.Core.csproj.FileListAbsolute.txt

@@ -0,0 +1,11 @@
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\bin\Release\net8.0\PRecUpdate.Core.deps.json
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\bin\Release\net8.0\PRecUpdate.Core.dll
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\bin\Release\net8.0\PRecUpdate.Core.pdb
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\obj\Release\net8.0\PRecUpdate.Core.GeneratedMSBuildEditorConfig.editorconfig
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\obj\Release\net8.0\PRecUpdate.Core.AssemblyInfoInputs.cache
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\obj\Release\net8.0\PRecUpdate.Core.AssemblyInfo.cs
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\obj\Release\net8.0\PRecUpdate.Core.csproj.CoreCompileInputs.cache
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\obj\Release\net8.0\PRecUpdate.Core.dll
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\obj\Release\net8.0\refint\PRecUpdate.Core.dll
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\obj\Release\net8.0\PRecUpdate.Core.pdb
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Core\obj\Release\net8.0\ref\PRecUpdate.Core.dll

Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/project.assets.json

@@ -0,0 +1,72 @@
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+      "projectPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj",
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Plant3D2026/P_Rec_Update/src/PRecUpdate.Core/obj/project.nuget.cache

@@ -0,0 +1,8 @@
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+  "dgSpecHash": "BnSucAuYJHU=",
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+  "logs": []
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/CommandRegistration.cs

@@ -0,0 +1,3 @@
+using Autodesk.AutoCAD.Runtime;
+
+[assembly: CommandClass(typeof(PRecUpdate.Plant3D2026.EntryPoint))]

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/EntryPoint.cs

@@ -0,0 +1,49 @@
+using Autodesk.AutoCAD.ApplicationServices;
+using Autodesk.AutoCAD.Runtime;
+using PRecUpdate.Core;
+using AcadApplication = Autodesk.AutoCAD.ApplicationServices.Application;
+
+namespace PRecUpdate.Plant3D2026;
+
+public sealed class EntryPoint : IExtensionApplication
+{
+    public void Initialize()
+    {
+        RuntimeMarker.Write("AssemblyInitializeStarted");
+        RuntimeMarker.Write("AssemblyInitializeCompleted");
+    }
+
+    public void Terminate() => RuntimeMarker.Write("AssemblyTerminateCompleted");
+
+    // Preserves the legacy command name. Apply remains denied unless a future
+    // controlled fixture adapter proves the legacy Plant/DataLinks semantics.
+    [CommandMethod("P-R-UPD", CommandFlags.Session)]
+    public void UpdateCommand() => ReportPlan("P-R-UPD");
+
+    [CommandMethod("P-R-UPD-STATUS", CommandFlags.Session)]
+    public void StatusCommand() => ReportPlan("P-R-UPD-STATUS");
+
+    private static void ReportPlan(string command)
+    {
+        var document = AcadApplication.DocumentManager.MdiActiveDocument;
+        var plan = new UpdatePlanBuilder().Build(new UpdateRequest(
+            document is not null,
+            HasPlantProject(),
+            HasPlantProject(),
+            new HashSet<UpdateOperation>
+            {
+                UpdateOperation.ProjectNkr, UpdateOperation.Flanges,
+                UpdateOperation.Fasteners, UpdateOperation.ProjectSpec
+            },
+            UpdateExecutionMode.DryRun,
+            ControlledFixturePermit: false));
+        document?.Editor.WriteMessage($"\nP_Rec_Update {command}: {(plan.Accepted ? "DryRun planned; no project data changed." : string.Join(", ", plan.Diagnostics))}");
+        RuntimeMarker.Write(plan.Accepted ? "CommandRegistrationVerified" : "CommandPreflightRejected");
+    }
+
+    private static bool HasPlantProject()
+    {
+        try { return Autodesk.ProcessPower.PlantInstance.PlantApplication.CurrentProject is not null; }
+        catch { return false; }
+    }
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/PRecUpdate.Plant3D2026.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net8.0-windows</TargetFramework><PlatformTarget>x64</PlatformTarget>
+    <AssemblyName>PRecUpdate.Plant3D2026</AssemblyName>
+  </PropertyGroup>
+  <ItemGroup><ProjectReference Include="..\PRecUpdate.Core\PRecUpdate.Core.csproj" /></ItemGroup>
+  <ItemGroup Condition="Exists('$(AutoCAD2026ManagedDir)')">
+    <Reference Include="AcMgd"><HintPath>$(AutoCAD2026ManagedDir)\AcMgd.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
+    <Reference Include="AcDbMgd"><HintPath>$(AutoCAD2026ManagedDir)\AcDbMgd.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
+    <Reference Include="AcCoreMgd"><HintPath>$(AutoCAD2026ManagedDir)\AcCoreMgd.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
+    <Reference Include="PnPProjectManagerMgd" Condition="Exists('$(Plant3D2026ManagedDir)\PnPProjectManagerMgd.dll')"><HintPath>$(Plant3D2026ManagedDir)\PnPProjectManagerMgd.dll</HintPath><Private>false</Private><CopyLocal>false</CopyLocal></Reference>
+  </ItemGroup>
+</Project>

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/RuntimeMarker.cs

@@ -0,0 +1,27 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace PRecUpdate.Plant3D2026;
+
+internal static class RuntimeMarker
+{
+    internal static void Write(string state)
+    {
+        var root = Environment.GetEnvironmentVariable("P_REC_UPDATE_MARKER_ROOT");
+        if (string.IsNullOrWhiteSpace(root)) return;
+        try
+        {
+            Directory.CreateDirectory(root);
+            var payload = $"{DateTimeOffset.UtcNow:O}|{state}|{typeof(EntryPoint).Assembly.GetName().Name}";
+            File.WriteAllText(Path.Combine(root, state + ".marker"), payload, new UTF8Encoding(false));
+        }
+        catch { /* Evidence cannot make Plant initialization fail. */ }
+    }
+
+    internal static string AssemblySha256()
+    {
+        var location = typeof(EntryPoint).Assembly.Location;
+        using var stream = File.OpenRead(location);
+        return Convert.ToHexString(SHA256.HashData(stream));
+    }
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/bin/Release/net8.0-windows/PRecUpdate.Plant3D2026.deps.json

@@ -0,0 +1,39 @@
+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v8.0",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v8.0": {
+      "PRecUpdate.Plant3D2026/1.0.0": {
+        "dependencies": {
+          "PRecUpdate.Core": "1.0.0"
+        },
+        "runtime": {
+          "PRecUpdate.Plant3D2026.dll": {}
+        }
+      },
+      "PRecUpdate.Core/1.0.0": {
+        "runtime": {
+          "PRecUpdate.Core.dll": {
+            "assemblyVersion": "1.0.0",
+            "fileVersion": "1.0.0.0"
+          }
+        }
+      }
+    }
+  },
+  "libraries": {
+    "PRecUpdate.Plant3D2026/1.0.0": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    },
+    "PRecUpdate.Core/1.0.0": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    }
+  }
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/PRecUpdate.Plant3D2026.csproj.nuget.dgspec.json

@@ -0,0 +1,130 @@
+{
+  "format": 1,
+  "restore": {
+    "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\PRecUpdate.Plant3D2026.csproj": {}
+  },
+  "projects": {
+    "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj": {
+      "version": "1.0.0",
+      "restore": {
+        "projectUniqueName": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj",
+        "projectName": "PRecUpdate.Core",
+        "projectPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj",
+        "packagesPath": "C:\\Users\\codex\\.nuget\\packages\\",
+        "outputPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\obj\\",
+        "projectStyle": "PackageReference",
+        "configFilePaths": [
+          "C:\\Users\\codex\\AppData\\Roaming\\NuGet\\NuGet.Config"
+        ],
+        "originalTargetFrameworks": [
+          "net8.0"
+        ],
+        "sources": {
+          "https://api.nuget.org/v3/index.json": {}
+        },
+        "frameworks": {
+          "net8.0": {
+            "targetAlias": "net8.0",
+            "projectReferences": {}
+          }
+        },
+        "warningProperties": {
+          "allWarningsAsErrors": true,
+          "warnAsError": [
+            "NU1605"
+          ]
+        },
+        "restoreAuditProperties": {
+          "enableAudit": "true",
+          "auditLevel": "low",
+          "auditMode": "direct"
+        }
+      },
+      "frameworks": {
+        "net8.0": {
+          "targetAlias": "net8.0",
+          "imports": [
+            "net461",
+            "net462",
+            "net47",
+            "net471",
+            "net472",
+            "net48",
+            "net481"
+          ],
+          "assetTargetFallback": true,
+          "warn": true,
+          "frameworkReferences": {
+            "Microsoft.NETCore.App": {
+              "privateAssets": "all"
+            }
+          },
+          "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\8.0.423/PortableRuntimeIdentifierGraph.json"
+        }
+      }
+    },
+    "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\PRecUpdate.Plant3D2026.csproj": {
+      "version": "1.0.0",
+      "restore": {
+        "projectUniqueName": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\PRecUpdate.Plant3D2026.csproj",
+        "projectName": "PRecUpdate.Plant3D2026",
+        "projectPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\PRecUpdate.Plant3D2026.csproj",
+        "packagesPath": "C:\\Users\\codex\\.nuget\\packages\\",
+        "outputPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\obj\\",
+        "projectStyle": "PackageReference",
+        "configFilePaths": [
+          "C:\\Users\\codex\\AppData\\Roaming\\NuGet\\NuGet.Config"
+        ],
+        "originalTargetFrameworks": [
+          "net8.0-windows"
+        ],
+        "sources": {
+          "https://api.nuget.org/v3/index.json": {}
+        },
+        "frameworks": {
+          "net8.0-windows7.0": {
+            "targetAlias": "net8.0-windows",
+            "projectReferences": {
+              "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj": {
+                "projectPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj"
+              }
+            }
+          }
+        },
+        "warningProperties": {
+          "allWarningsAsErrors": true,
+          "warnAsError": [
+            "NU1605"
+          ]
+        },
+        "restoreAuditProperties": {
+          "enableAudit": "true",
+          "auditLevel": "low",
+          "auditMode": "direct"
+        }
+      },
+      "frameworks": {
+        "net8.0-windows7.0": {
+          "targetAlias": "net8.0-windows",
+          "imports": [
+            "net461",
+            "net462",
+            "net47",
+            "net471",
+            "net472",
+            "net48",
+            "net481"
+          ],
+          "assetTargetFallback": true,
+          "warn": true,
+          "frameworkReferences": {
+            "Microsoft.NETCore.App": {
+              "privateAssets": "all"
+            }
+          },
+          "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\8.0.423/PortableRuntimeIdentifierGraph.json"
+        }
+      }
+    }
+  }
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/PRecUpdate.Plant3D2026.csproj.nuget.g.props

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <RestoreSuccess Condition=" '$(RestoreSuccess)' == '' ">True</RestoreSuccess>
+    <RestoreTool Condition=" '$(RestoreTool)' == '' ">NuGet</RestoreTool>
+    <ProjectAssetsFile Condition=" '$(ProjectAssetsFile)' == '' ">$(MSBuildThisFileDirectory)project.assets.json</ProjectAssetsFile>
+    <NuGetPackageRoot Condition=" '$(NuGetPackageRoot)' == '' ">$(UserProfile)\.nuget\packages\</NuGetPackageRoot>
+    <NuGetPackageFolders Condition=" '$(NuGetPackageFolders)' == '' ">C:\Users\codex\.nuget\packages\</NuGetPackageFolders>
+    <NuGetProjectStyle Condition=" '$(NuGetProjectStyle)' == '' ">PackageReference</NuGetProjectStyle>
+    <NuGetToolVersion Condition=" '$(NuGetToolVersion)' == '' ">6.11.2</NuGetToolVersion>
+  </PropertyGroup>
+  <ItemGroup Condition=" '$(ExcludeRestorePackageImports)' != 'true' ">
+    <SourceRoot Include="C:\Users\codex\.nuget\packages\" />
+  </ItemGroup>
+</Project>

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/PRecUpdate.Plant3D2026.csproj.nuget.g.targets

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" />

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/Release/net8.0-windows/.NETCoreApp,Version=v8.0.AssemblyAttributes.cs

@@ -0,0 +1,4 @@
+// <autogenerated />
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v8.0", FrameworkDisplayName = ".NET 8.0")]

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/Release/net8.0-windows/PRecUpdate.Plant3D2026.AssemblyInfo.cs

@@ -0,0 +1,24 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("PRecUpdate.Plant3D2026")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Release")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+c3ac183fffdbd353bfd96d3e55dfff47a661ec3a")]
+[assembly: System.Reflection.AssemblyProductAttribute("PRecUpdate.Plant3D2026")]
+[assembly: System.Reflection.AssemblyTitleAttribute("PRecUpdate.Plant3D2026")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+[assembly: System.Runtime.Versioning.TargetPlatformAttribute("Windows7.0")]
+[assembly: System.Runtime.Versioning.SupportedOSPlatformAttribute("Windows7.0")]
+
+// Создано классом WriteCodeFragment MSBuild.
+

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/Release/net8.0-windows/PRecUpdate.Plant3D2026.AssemblyInfoInputs.cache

@@ -0,0 +1 @@
+682b6989a687db82779b40f415b89b18ed3478f81acc7b20af0606373c276e10

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/Release/net8.0-windows/PRecUpdate.Plant3D2026.GeneratedMSBuildEditorConfig.editorconfig

@@ -0,0 +1,13 @@
+is_global = true
+build_property.TargetFramework = net8.0-windows
+build_property.TargetPlatformMinVersion = 7.0
+build_property.UsingMicrosoftNETSdkWeb = 
+build_property.ProjectTypeGuids = 
+build_property.InvariantGlobalization = 
+build_property.PlatformNeutralAssembly = 
+build_property.EnforceExtendedAnalyzerRules = 
+build_property._SupportedPlatformList = Linux,macOS,Windows
+build_property.RootNamespace = PRecUpdate.Plant3D2026
+build_property.ProjectDir = C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\
+build_property.EnableComHosting = 
+build_property.EnableGeneratedComInterfaceComImportInterop = 

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/Release/net8.0-windows/PRecUpdate.Plant3D2026.GlobalUsings.g.cs

@@ -0,0 +1,8 @@
+// <auto-generated/>
+global using global::System;
+global using global::System.Collections.Generic;
+global using global::System.IO;
+global using global::System.Linq;
+global using global::System.Net.Http;
+global using global::System.Threading;
+global using global::System.Threading.Tasks;

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/Release/net8.0-windows/PRecUpdate.Plant3D2026.csproj.CoreCompileInputs.cache

@@ -0,0 +1 @@
+ade5d91c57cf0f5fd89f1f07c0955959365678d4f89462207c831dd45b20ab2d

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/Release/net8.0-windows/PRecUpdate.Plant3D2026.csproj.FileListAbsolute.txt

@@ -0,0 +1,15 @@
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\PRecUpdate.Plant3D2026.csproj.AssemblyReference.cache
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\PRecUpdate.Plant3D2026.GeneratedMSBuildEditorConfig.editorconfig
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\PRecUpdate.Plant3D2026.AssemblyInfoInputs.cache
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\PRecUpdate.Plant3D2026.AssemblyInfo.cs
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\PRecUpdate.Plant3D2026.csproj.CoreCompileInputs.cache
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\bin\Release\net8.0-windows\PRecUpdate.Plant3D2026.deps.json
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\bin\Release\net8.0-windows\PRecUpdate.Plant3D2026.dll
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\bin\Release\net8.0-windows\PRecUpdate.Plant3D2026.pdb
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\bin\Release\net8.0-windows\PRecUpdate.Core.dll
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\bin\Release\net8.0-windows\PRecUpdate.Core.pdb
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\PRecUpda.65EEC080.Up2Date
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\PRecUpdate.Plant3D2026.dll
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\refint\PRecUpdate.Plant3D2026.dll
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\PRecUpdate.Plant3D2026.pdb
+C:\dev\worktrees\autodesk-plant3d-2026-integration\Plant3D2026\P_Rec_Update\src\PRecUpdate.Plant3D2026\obj\Release\net8.0-windows\ref\PRecUpdate.Plant3D2026.dll

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/project.assets.json

@@ -0,0 +1,95 @@
+{
+  "version": 3,
+  "targets": {
+    "net8.0-windows7.0": {
+      "PRecUpdate.Core/1.0.0": {
+        "type": "project",
+        "framework": ".NETCoreApp,Version=v8.0",
+        "compile": {
+          "bin/placeholder/PRecUpdate.Core.dll": {}
+        },
+        "runtime": {
+          "bin/placeholder/PRecUpdate.Core.dll": {}
+        }
+      }
+    }
+  },
+  "libraries": {
+    "PRecUpdate.Core/1.0.0": {
+      "type": "project",
+      "path": "../PRecUpdate.Core/PRecUpdate.Core.csproj",
+      "msbuildProject": "../PRecUpdate.Core/PRecUpdate.Core.csproj"
+    }
+  },
+  "projectFileDependencyGroups": {
+    "net8.0-windows7.0": [
+      "PRecUpdate.Core >= 1.0.0"
+    ]
+  },
+  "packageFolders": {
+    "C:\\Users\\codex\\.nuget\\packages\\": {}
+  },
+  "project": {
+    "version": "1.0.0",
+    "restore": {
+      "projectUniqueName": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\PRecUpdate.Plant3D2026.csproj",
+      "projectName": "PRecUpdate.Plant3D2026",
+      "projectPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\PRecUpdate.Plant3D2026.csproj",
+      "packagesPath": "C:\\Users\\codex\\.nuget\\packages\\",
+      "outputPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\obj\\",
+      "projectStyle": "PackageReference",
+      "configFilePaths": [
+        "C:\\Users\\codex\\AppData\\Roaming\\NuGet\\NuGet.Config"
+      ],
+      "originalTargetFrameworks": [
+        "net8.0-windows"
+      ],
+      "sources": {
+        "https://api.nuget.org/v3/index.json": {}
+      },
+      "frameworks": {
+        "net8.0-windows7.0": {
+          "targetAlias": "net8.0-windows",
+          "projectReferences": {
+            "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj": {
+              "projectPath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Core\\PRecUpdate.Core.csproj"
+            }
+          }
+        }
+      },
+      "warningProperties": {
+        "allWarningsAsErrors": true,
+        "warnAsError": [
+          "NU1605"
+        ]
+      },
+      "restoreAuditProperties": {
+        "enableAudit": "true",
+        "auditLevel": "low",
+        "auditMode": "direct"
+      }
+    },
+    "frameworks": {
+      "net8.0-windows7.0": {
+        "targetAlias": "net8.0-windows",
+        "imports": [
+          "net461",
+          "net462",
+          "net47",
+          "net471",
+          "net472",
+          "net48",
+          "net481"
+        ],
+        "assetTargetFallback": true,
+        "warn": true,
+        "frameworkReferences": {
+          "Microsoft.NETCore.App": {
+            "privateAssets": "all"
+          }
+        },
+        "runtimeIdentifierGraphPath": "C:\\Program Files\\dotnet\\sdk\\8.0.423/PortableRuntimeIdentifierGraph.json"
+      }
+    }
+  }
+}

Plant3D2026/P_Rec_Update/src/PRecUpdate.Plant3D2026/obj/project.nuget.cache

@@ -0,0 +1,8 @@
+{
+  "version": 2,
+  "dgSpecHash": "mjO3sU71BBQ=",
+  "success": true,
+  "projectFilePath": "C:\\dev\\worktrees\\autodesk-plant3d-2026-integration\\Plant3D2026\\P_Rec_Update\\src\\PRecUpdate.Plant3D2026\\PRecUpdate.Plant3D2026.csproj",
+  "expectedPackageFiles": [],
+  "logs": []
+}

Plant3D2026/P_Rec_Update/tests/PRecUpdate.Core.Tests/PRecUpdate.Core.Tests.csproj

@@ -0,0 +1,6 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup><TargetFramework>net8.0</TargetFramework><IsPackable>false</IsPackable><IsTestProject>true</IsTestProject></PropertyGroup>
+  <ItemGroup><ProjectReference Include="..\..\src\PRecUpdate.Core\PRecUpdate.Core.csproj" /></ItemGroup>
+  <ItemGroup><PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" /><PackageReference Include="xunit" Version="2.5.3" /><PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" /></ItemGroup>
+  <ItemGroup><Using Include="Xunit" /></ItemGroup>
+</Project>

Plant3D2026/P_Rec_Update/tests/PRecUpdate.Core.Tests/UpdatePlanBuilderTests.cs

@@ -0,0 +1,49 @@
+using PRecUpdate.Core;
+
+namespace PRecUpdate.Core.Tests;
+
+public sealed class UpdatePlanBuilderTests
+{
+    private readonly UpdatePlanBuilder builder = new();
+
+    [Fact]
+    public void DryRun_orders_selected_operations_without_writes()
+    {
+        var plan = builder.Build(new UpdateRequest(true, true, true,
+            new HashSet<UpdateOperation> { UpdateOperation.Fasteners, UpdateOperation.ProjectNkr }, UpdateExecutionMode.DryRun, false));
+        Assert.True(plan.Accepted);
+        Assert.Equal(new[] { UpdateOperation.ProjectNkr, UpdateOperation.Fasteners }, plan.Operations);
+        Assert.False(plan.MayWriteDrawing);
+        Assert.False(plan.MayWriteProjectData);
+    }
+
+    [Fact]
+    public void Rejects_missing_project_and_empty_selection()
+    {
+        var plan = builder.Build(new UpdateRequest(false, false, false, new HashSet<UpdateOperation>(), UpdateExecutionMode.DryRun, false));
+        Assert.False(plan.Accepted);
+        Assert.Contains("ACTIVE_DOCUMENT_REQUIRED", plan.Diagnostics);
+        Assert.Contains("PLANT_PROJECT_REQUIRED", plan.Diagnostics);
+        Assert.Contains("PIPING_PROJECT_PART_REQUIRED", plan.Diagnostics);
+        Assert.Contains("UPDATE_OPERATION_REQUIRED", plan.Diagnostics);
+    }
+
+    [Fact]
+    public void Apply_requires_explicit_controlled_fixture_permit()
+    {
+        var plan = builder.Build(new UpdateRequest(true, true, true,
+            new HashSet<UpdateOperation> { UpdateOperation.ProjectSpec }, UpdateExecutionMode.Apply, false));
+        Assert.False(plan.Accepted);
+        Assert.Contains("CONTROLLED_FIXTURE_PERMIT_REQUIRED", plan.Diagnostics);
+    }
+
+    [Fact]
+    public void Permitted_apply_is_the_only_write_capable_plan()
+    {
+        var plan = builder.Build(new UpdateRequest(true, true, true,
+            new HashSet<UpdateOperation> { UpdateOperation.ProjectSpec }, UpdateExecutionMode.Apply, true));
+        Assert.True(plan.Accepted);
+        Assert.True(plan.MayWriteDrawing);
+        Assert.True(plan.MayWriteProjectData);
+    }
+}

Plant3D2026/P_Rec_Update/tests/PRecUpdate.Core.Tests/bin/Release/net8.0/PRecUpdate.Core.Tests.runtimeconfig.json

@@ -0,0 +1,13 @@
+{
+  "runtimeOptions": {
+    "tfm": "net8.0",
+    "framework": {
+      "name": "Microsoft.NETCore.App",
+      "version": "8.0.0"
+    },
+    "configProperties": {
+      "System.Reflection.Metadata.MetadataUpdater.IsSupported": false,
+      "System.Runtime.Serialization.EnableUnsafeBinaryFormatterSerialization": false
+    }
+  }
+}