atlasbot: always include snapshot header

atlasbot/engine/answerer.py

@@ -159,6 +159,19 @@ class AnswerEngine:
             classify.setdefault("needs_snapshot", True)
             classify.setdefault("answer_style", "direct")
             classify.setdefault("follow_up", False)
+            cluster_terms = (
+                "atlas",
+                "cluster",
+                "node",
+                "nodes",
+                "namespace",
+                "pod",
+                "workload",
+                "k8s",
+                "kubernetes",
+            )
+            if any(term in normalized.lower() for term in cluster_terms):
+                classify["needs_snapshot"] = True
 
             if classify.get("follow_up") and state and state.claims:
                 if observer:
@@ -594,7 +607,15 @@ def _select_chunks(
     if not chunks:
         return []
     ranked = sorted(chunks, key=lambda item: scores.get(item["id"], 0.0), reverse=True)
-    selected = ranked[: plan.chunk_top]
+    selected: list[dict[str, Any]] = []
+    head = chunks[0]
+    selected.append(head)
+    for item in ranked:
+        if len(selected) >= plan.chunk_top:
+            break
+        if item is head:
+            continue
+        selected.append(item)
     return selected