diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000..eeb2ddad
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,17 @@
+version: 2
+updates:
+  # Monitor NuGet packages (Directory.Packages.props)
+  - package-ecosystem: "nuget"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    groups:
+      nuget-dependencies:
+        patterns:
+          - "*"
+
+  # Monitor .NET SDK version (global.json)
+  - package-ecosystem: "dotnet-sdk"
+    directory: "/"
+    schedule:
+      interval: "weekly"
diff --git a/AGENTS.md b/AGENTS.md
index bd04f880..d3d8dc23 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -27,6 +27,7 @@ Originally NUKE by [matkoch](https://github.com/matkoch); under new maintenance
 - Central package versions in `Directory.Packages.props` — never add a `Version=` to an individual `PackageReference`.
 - xUnit + FluentAssertions + Verify.Xunit for tests.
 - Solution file is `fallout.slnx` (new XML solution format, not `.sln`).
+- Dependency updates: Handled by Dependabot (weekly grouped PRs).
 
 ## Common commands