diff --git a/.github/workflows/runner-probe.yml b/.github/workflows/runner-probe.yml
new file mode 100644
index 0000000..f4eb157
--- /dev/null
+++ b/.github/workflows/runner-probe.yml
@@ -0,0 +1,13 @@
+name: Runner probe
+on: workflow_dispatch
+jobs:
+  probe:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Hardware
+        run: |
+          echo "nproc: $(nproc)"; free -m | head -2
+          echo "cgroup mem: $(cat /sys/fs/cgroup/memory.max 2>/dev/null || cat /sys/fs/cgroup/memory/memory.limit_in_bytes 2>/dev/null)"
+          grep -m1 'model name' /proc/cpuinfo; grep -m1 'hypervisor' /proc/cpuinfo >/dev/null && echo "hypervisor flag: yes" || echo "hypervisor flag: no"
+          echo "flags: $(grep -m1 '^flags' /proc/cpuinfo | tr ' ' '\n' | grep -E '^(avx|avx2|avx512[a-z]*|sse4_2|bmi2|aes|erms|rdrand|pclmulqdq)$' | tr '\n' ' ')"
+          uname -r; df -h /workspace /tmp 2>/dev/null | tail -2