diff --git a/ariadne/services/cluster_state.py b/ariadne/services/cluster_state.py
index b794327..004c9c0 100644
--- a/ariadne/services/cluster_state.py
+++ b/ariadne/services/cluster_state.py
@@ -150,6 +150,42 @@ def _node_details(payload: dict[str, Any]) -> list[dict[str, Any]]:
     return details
 
 
+def _summarize_inventory(details: list[dict[str, Any]]) -> dict[str, Any]:
+    summary = {
+        "total": 0,
+        "ready": 0,
+        "workers": {"total": 0, "ready": 0},
+        "by_hardware": {},
+        "by_arch": {},
+        "by_role": {},
+        "not_ready_names": [],
+    }
+    not_ready: list[str] = []
+    for node in details:
+        name = node.get("name") if isinstance(node, dict) else ""
+        if not isinstance(name, str) or not name:
+            continue
+        summary["total"] += 1
+        ready = bool(node.get("ready"))
+        if ready:
+            summary["ready"] += 1
+        else:
+            not_ready.append(name)
+        if node.get("is_worker"):
+            summary["workers"]["total"] += 1
+            if ready:
+                summary["workers"]["ready"] += 1
+        hardware = node.get("hardware") or "unknown"
+        arch = node.get("arch") or "unknown"
+        summary["by_hardware"][hardware] = summary["by_hardware"].get(hardware, 0) + 1
+        summary["by_arch"][arch] = summary["by_arch"].get(arch, 0) + 1
+        for role in node.get("roles") or []:
+            summary["by_role"][role] = summary["by_role"].get(role, 0) + 1
+    not_ready.sort()
+    summary["not_ready_names"] = not_ready
+    return summary
+
+
 def _node_roles(labels: dict[str, Any]) -> list[str]:
     roles: list[str] = []
     for key in labels.keys():
@@ -487,10 +523,12 @@ def collect_cluster_state() -> tuple[dict[str, Any], ClusterStateSummary]:
 
     nodes: dict[str, Any] | None = None
     node_details: list[dict[str, Any]] = []
+    node_summary: dict[str, Any] = {}
     try:
         payload = get_json("/api/v1/nodes")
         nodes = _summarize_nodes(payload)
         node_details = _node_details(payload)
+        node_summary = _summarize_inventory(node_details)
     except Exception as exc:
         errors.append(f"nodes: {exc}")
 
@@ -515,6 +553,7 @@ def collect_cluster_state() -> tuple[dict[str, Any], ClusterStateSummary]:
     snapshot = {
         "collected_at": collected_at.isoformat(),
         "nodes": nodes or {},
+        "nodes_summary": node_summary,
         "nodes_detail": node_details,
         "flux": kustomizations or {},
         "workloads": workloads,
diff --git a/tests/test_cluster_state.py b/tests/test_cluster_state.py
index 381c2c1..534447a 100644
--- a/tests/test_cluster_state.py
+++ b/tests/test_cluster_state.py
@@ -76,6 +76,8 @@ def test_collect_cluster_state(monkeypatch) -> None:
     assert snapshot["nodes"]["total"] == 2
     assert snapshot["nodes"]["ready"] == 1
     assert snapshot["flux"]["not_ready"] == 1
+    assert snapshot["nodes_summary"]["total"] == 2
+    assert snapshot["nodes_summary"]["ready"] == 1
     assert snapshot["nodes_detail"]
     assert snapshot["workloads"]
     assert summary.nodes_total == 2