diff --git a/.gitignore b/.gitignore
index 75b9cad4f..2cbd223f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -109,3 +109,6 @@ tests/_scratch_*
 .nuget-sandbox/
 .dotnet-sandbox/
 .appdata-sandbox/
+
+# Stryker.NET mutation reports (regenerated per run)
+StrykerOutput/
diff --git a/dotnet-tools.json b/dotnet-tools.json
new file mode 100644
index 000000000..bd8661400
--- /dev/null
+++ b/dotnet-tools.json
@@ -0,0 +1,13 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "dotnet-stryker": {
+      "version": "5.0.0",
+      "commands": [
+        "dotnet-stryker"
+      ],
+      "rollForward": false
+    }
+  }
+}
\ No newline at end of file