diff --git a/packages.yaml b/packages.yaml
index f5b3a52..7a195a8 100644
--- a/packages.yaml
+++ b/packages.yaml
@@ -1,11 +1,26 @@
 sources:
+  # metadata_only: dotnet ships in AlmaLinux 10's OWN AppStream repo (not a
+  # separate Microsoft repo) - clients already have it enabled by default.
+  # No RPMs are mirrored here; this source only curates which of those
+  # already-installable packages show up in Discover/GNOME Software.
   - name: dotnet
     baseurl: https://repo.almalinux.org/almalinux/10/AppStream/x86_64/os/
     gpgkey: https://repo.almalinux.org/almalinux/RPM-GPG-KEY-AlmaLinux-10
+    metadata_only: true
     packages:
       - dotnet-sdk-8.0
       - dotnet-runtime-8.0
       - dotnet-sdk-9.0
       - dotnet-runtime-9.0
       - dotnet-sdk-10.0
-      - dotnet-runtime-10.0
\ No newline at end of file
+      - dotnet-runtime-10.0
+
+  # A genuine third-party repo: RPMs ARE downloaded, filtered, verified,
+  # re-signed with the mirror key and published (metadata_only omitted /
+  # false is the default).
+  # - name: some-vendor
+  #   baseurl: https://repo.example.com/el10/x86_64/
+  #   gpgkey: https://repo.example.com/RPM-GPG-KEY-example
+  #   packages:
+  #     - some-vendor-cli
+  #     - some-vendor-agent
\ No newline at end of file