Stabilize patch apply status enum values

Author: KSemenenko

AGENTS.md

@@ -208,6 +208,7 @@ If no new rule is detected -> do not update the file.
 - Read `AGENTS.md` and relevant docs before editing code.
 - Keep API behavior aligned with actual Gemini CLI contracts first; TypeScript SDK mapping may be used only as an optional historical reference, not as a blocker for C# SDK design.
 - For `ManagedCode.GeminiSharpSDK`, do not import Codex-specific behavior, docs, or assumptions into implementation or tests unless the user explicitly asks for cross-SDK comparison; keep Gemini fixes grounded in real Gemini CLI behavior.
+- Do not involve Copilot-specific workflows, assignments, or assumptions in this repository unless the user explicitly asks for them; handle review and fix work directly in the repo.
 - Maintain GitHub workflow health (`.github/workflows`).
 
 **Ask first:**

GeminiSharpSDK.Tests/Unit/ThreadEventParserTests.cs

@@ -78,6 +78,18 @@ public async Task Parse_ParsesFileChangeItemStartedWithInProgressStatus()
         await Assert.That(fileChange.Changes[0].Kind).IsEqualTo(PatchChangeKind.Add);
     }
 
+    [Test]
+    public async Task PatchApplyStatus_PublicNumericValues_RemainStable()
+    {
+        var completed = (int)PatchApplyStatus.Completed;
+        var failed = (int)PatchApplyStatus.Failed;
+        var inProgress = (int)PatchApplyStatus.InProgress;
+
+        await Assert.That(completed).IsEqualTo(0);
+        await Assert.That(failed).IsEqualTo(1);
+        await Assert.That(inProgress).IsEqualTo(2);
+    }
+
     [Test]
     public async Task Parse_ThrowsForUnsupportedEventType()
     {

GeminiSharpSDK/Models/Items.cs

@@ -25,9 +25,9 @@ public enum PatchChangeKind
 
 public enum PatchApplyStatus
 {
-    InProgress,
-    Completed,
-    Failed,
+    Completed = 0,
+    Failed = 1,
+    InProgress = 2,
 }
 
 public enum McpToolCallStatus