diff --git a/servers/unraid/tail2-pose-server/diagnostic.compose.yaml b/servers/unraid/tail2-pose-server/diagnostic.compose.yaml
new file mode 100644
index 0000000..6b4838d
--- /dev/null
+++ b/servers/unraid/tail2-pose-server/diagnostic.compose.yaml
@@ -0,0 +1,64 @@
+services:
+  diagnostic:
+    image: nvcr.io/nvidia/pytorch:25.12-py3
+    network_mode: host
+    gpus: all
+    volumes:
+      - /:/host:ro
+      - ./diagnostics:/diagnostics
+    command:
+      - /bin/bash
+      - -lc
+      - |
+        set -uo pipefail
+        exec > /diagnostics/report.txt 2>&1
+        echo "timestamp=$$(date -u +%FT%TZ)"
+        echo "hostname=$$(cat /host/etc/hostname 2>/dev/null || true)"
+        echo "lan_ipv4=$$(hostname -I 2>/dev/null || true)"
+        python3 - <<'PY'
+        import socket
+        for port in range(18120, 18130):
+            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            try:
+                sock.bind(('0.0.0.0', port))
+                print(f'port_{port}=free')
+            except OSError as exc:
+                print(f'port_{port}=busy:{exc.errno}')
+            finally:
+                sock.close()
+        PY
+        echo '--- nvidia-smi ---'
+        nvidia-smi
+        echo '--- cuda/python ---'
+        python3 - <<'PY'
+        import torch
+        print('torch=' + torch.__version__)
+        print('cuda_available=' + str(torch.cuda.is_available()))
+        if torch.cuda.is_available():
+            print('gpu_name=' + torch.cuda.get_device_name(0))
+            print('gpu_total_bytes=' + str(torch.cuda.get_device_properties(0).total_memory))
+        PY
+        echo '--- target directories ---'
+        for path in /host/mnt/user/appdata/tail2-pose-server /host/mnt/user/appdata/tail2-pose-server-v1; do
+          if [ -e "$$path" ]; then
+            stat -c '%A %a %u:%g %n' "$$path"
+            find "$$path" -mindepth 1 -maxdepth 2 -printf '%M %u:%g %p\n' | head -100
+          else
+            echo "missing $$path"
+          fi
+        done
+        echo '--- NDI runtime candidates ---'
+        find /host/usr /host/opt /host/mnt/user/appdata -xdev \( -iname 'libndi.so*' -o -iname '*ndi*runtime*' -o -iname 'Processing.NDI.Lib.h' \) -print 2>/dev/null | head -200
+        echo '--- camera reachability ---'
+        python3 - <<'PY'
+        import socket
+        print('camera_tcp_probe_only=192.168.50.207')
+        for port in (80, 443, 5960, 5961):
+            s = socket.socket()
+            s.settimeout(1)
+            try:
+                rc = s.connect_ex(('192.168.50.207', port))
+            finally:
+                s.close()
+            print(f'camera_port_{port}_connect_ex={rc}')
+        PY
diff --git a/servers/unraid/tail2-pose-server/diagnostics/.gitignore b/servers/unraid/tail2-pose-server/diagnostics/.gitignore
new file mode 100644
index 0000000..d6b7ef3
--- /dev/null
+++ b/servers/unraid/tail2-pose-server/diagnostics/.gitignore
@@ -0,0 +1,2 @@
+*
+!.gitignore