feat(countme): ship the shared bluefin-countme reporter

elements/bluefin-server/os-countme.bst

@@ -0,0 +1,35 @@
+kind: manual
+description: |
+  Weekly first-party countme reporting.
+
+  The reporter is not defined here. It is taken from projectbluefin/common
+  system_files/shared, the same unit and helper every other image ships, so this
+  image counts through exactly the same bluefin-countme as the rest of the family.
+
+  The preset from common enables the timer; this image applies systemd presets,
+  so no enablement symlink is needed.
+
+sources:
+  - kind: git_repo
+    url: github:projectbluefin/common.git
+    track: main
+    ref: v2026.08-108-gd46c4df9f9988002120cff4a66df8b163070fe6d
+
+build-depends:
+  - base/base-stack.bst
+
+depends:
+  # The reporter reads image metadata with jq and sends the ping with curl.
+  - freedesktop-sdk.bst:components/curl.bst
+  - freedesktop-sdk.bst:components/jq.bst
+  - bluefin-server/os-image-info.bst
+
+variables:
+  strip-binaries: ""
+
+config:
+  install-commands:
+    - install -Dm755 system_files/shared/usr/libexec/bluefin-countme "%{install-root}%{prefix}/libexec/bluefin-countme"
+    - install -Dm644 system_files/shared/usr/lib/systemd/system/bluefin-countme.service -t "%{install-root}%{prefix}/lib/systemd/system/"
+    - install -Dm644 system_files/shared/usr/lib/systemd/system/bluefin-countme.timer -t "%{install-root}%{prefix}/lib/systemd/system/"
+    - install -Dm644 system_files/shared/usr/lib/systemd/system-preset/03-bluefin-countme.preset -t "%{install-root}%{prefix}/lib/systemd/system-preset/"

elements/bluefin-server/os-image-info.bst

@@ -0,0 +1,28 @@
+kind: manual
+description: |
+  Declare this image's identity at /usr/share/ublue-os/image-info.json.
+
+  The shared countme reporter from projectbluefin/common reads this file to know
+  which image it is counting. Every other image in the family already writes one;
+  this image is a DDI rather than an OCI image, so it has no image-info.json of
+  its own and no bootc ref to fall back to.
+
+  Only image-name is declared. A DDI is delivered by systemd-sysupdate and has no
+  container tag or flavor, and the reporter omits fields it is not given rather
+  than sending a placeholder.
+
+build-depends:
+  - base/base-stack.bst
+
+variables:
+  strip-binaries: ""
+
+config:
+  install-commands:
+    - mkdir -p "%{install-root}%{datadir}/ublue-os"
+    - |
+      cat >"%{install-root}%{datadir}/ublue-os/image-info.json" <<'JSON'
+      {
+        "image-name": "server"
+      }
+      JSON

elements/bluefin-server/os-stack.bst

@@ -25,6 +25,10 @@ depends:
   - bluefin-server/os-sshd-preset.bst
   - bluefin-server/os-sshd-config.bst
 
+  # Image identity and weekly first-party countme reporting
+  - bluefin-server/os-image-info.bst
+  - bluefin-server/os-countme.bst
+
   # Flatcar LTS Kernel & Matching ZFS
   - flatcar/flatcar-kernel.bst
   - flatcar/flatcar-zfs.bst