diff --git a/Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/LineNumberEditCommands.cs b/Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/LineNumberEditCommands.cs
index 879ca13..288f40a 100644
--- a/Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/LineNumberEditCommands.cs
+++ b/Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/LineNumberEditCommands.cs
@@ -50,6 +50,16 @@ internal static class LineNumberEditCommands
         if (document is null) return;
         try
         {
+            // These legacy editing paths are mutating commands.  Until each
+            // command has a permit that binds its selected owned block and
+            // requested edit, DryRun must remain read-only rather than letting
+            // an editor prompt accidentally commit a transaction.
+            if (!IsApply())
+            {
+                document.Editor.WriteMessage($"\n{command} preview boundary: Apply permit is required; DWG не изменён.");
+                RuntimeDiagnostics.Write("LineNumberEditPreviewCompleted", commandName: command, resultStatus: "ApplyPermitRequired", document: document);
+                return;
+            }
             var options = new PromptEntityOptions($"\n{prompt}");
             options.SetRejectMessage("\nТребуется вхождение блока PXP-LN.");
             options.AddAllowedClass(typeof(BlockReference), true);
@@ -67,4 +77,6 @@ internal static class LineNumberEditCommands
             document.Editor.WriteMessage($"\n{command}: {exception.Message}");
         }
     }
+
+    private static bool IsApply() => string.Equals(Environment.GetEnvironmentVariable("P_REC_ANNOT_RUNTIME_MODE"), "Apply", StringComparison.OrdinalIgnoreCase);
 }
diff --git a/Plant3D2026/P_Rec_Annot/tests/PRecAnnot.Core.Tests/LineNumberEditCommandRegistrationTests.cs b/Plant3D2026/P_Rec_Annot/tests/PRecAnnot.Core.Tests/LineNumberEditCommandRegistrationTests.cs
index 3ec83f2..bc09e63 100644
--- a/Plant3D2026/P_Rec_Annot/tests/PRecAnnot.Core.Tests/LineNumberEditCommandRegistrationTests.cs
+++ b/Plant3D2026/P_Rec_Annot/tests/PRecAnnot.Core.Tests/LineNumberEditCommandRegistrationTests.cs
@@ -53,6 +53,10 @@ public sealed class LineNumberEditCommandRegistrationTests
         Assert.Contains("if (!IsApply())", refresh);
         Assert.Contains("LINE_NUMBER_REFRESH_APPLY_REQUIRES_EXACTLY_ONE_OPERATION", refresh);
         Assert.Contains("LineNumberApplyPermitReader.Validate", refresh);
+
+        var edits = File.ReadAllText(Path.Combine(ProjectRoot, "LineNumberEditCommands.cs"));
+        Assert.Contains("if (!IsApply())", edits);
+        Assert.Contains("Apply permit is required", edits);
         Assert.Contains("PlantLineNumberCandidateReader", refresh);
         Assert.Contains("LineNumberCommandPreviewService", refresh);
         Assert.Contains("ApplyEdits", refresh);