diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d047ae1..e6e65aa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v5
         with:
-          dotnet-version: '10.0.x'
+          global-json-file: global.json
 
       - name: Build
         run: dotnet build TuiCode.slnx --configuration Release
@@ -80,7 +80,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v5
         with:
-          dotnet-version: '10.0.x'
+          global-json-file: global.json
 
       - name: AOT publish
         # No trim or AOT warnings: each one is a runtime failure waiting for the code path that hits it.
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index fbae829..dee98ec 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -64,7 +64,7 @@ jobs:
 
       - uses: actions/setup-dotnet@v5
         with:
-          dotnet-version: '10.0.x'
+          global-json-file: global.json
 
       - name: Publish
         shell: bash
diff --git a/AGENTS.md b/AGENTS.md
index 1a59f34..00fcf41 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -12,6 +12,8 @@ Per-feature catalogues ("what works today") don't go in the README — they belo
 
 ## Quick start
 
+Install the .NET SDK 10.0.402 or a newer 10.0 SDK ([download](https://dotnet.microsoft.com/download/dotnet/10.0)). `global.json` refuses anything older, and .NET 11 SDKs: an older SDK's Native AOT compiler crashes on macOS when a Go program starts TuiCode ([dotnet/runtime#132581](https://github.com/dotnet/runtime/issues/132581)). CI installs the SDK `global.json` names.
+
 ```bash
 dotnet build TuiCode.slnx
 dotnet run --project src/TuiCode                       # needs a real terminal
diff --git a/global.json b/global.json
new file mode 100644
index 0000000..6916a33
--- /dev/null
+++ b/global.json
@@ -0,0 +1,7 @@
+{
+  "sdk": {
+    "version": "10.0.402",
+    "rollForward": "latestFeature",
+    "allowPrerelease": false
+  }
+}
diff --git a/tests/TuiCode.Tests/UnsavedEditsHostTests.cs b/tests/TuiCode.Tests/UnsavedEditsHostTests.cs
index da7ddb3..cc5bef9 100644
--- a/tests/TuiCode.Tests/UnsavedEditsHostTests.cs
+++ b/tests/TuiCode.Tests/UnsavedEditsHostTests.cs
@@ -87,21 +87,12 @@ await HostSteps.RunUntilQuit(host,
                 workbench.UnsavedEdits!.Flush();
             },
             () => host.App.InjectKey(Key.Q.WithCtrl),
-            () => Confirm(workbench) is not null,
-            () =>
-            {
-                if (Confirm(workbench)?.FocusedChoice == "Don't save") return true;
-                host.App.InjectKey(Key.Tab);
-                return false;
-            },
-            () => host.App.InjectKey(Key.Enter));
+            () => ConfirmDialogs.Of(workbench) is not null,
+            ConfirmDialogs.Choose(host, workbench, "Don't save"));
 
         Assert.Empty(_fs.Directory.GetFiles(Recovery));
     }
 
-    private static ConfirmView? Confirm(Workbench.Workbench workbench) =>
-        workbench.SubViews.OfType<ConfirmView>().SingleOrDefault();
-
     private Workbench.Workbench BuildWorkbench(RecoveryOwner owner) =>
         new(new SidebarPart(new FileExplorerView()), new EditorPart(), new StatusBarPart(), _workspaces,
             recovery: new RecoveryStore(_fs, Recovery, owner, _ => false));