Converge netx-topology MCP to dual-unit drain + orbit/polish mainline.

Trim public tools to 14, expose only kept layout actions/recipes, merge Fabric queries, drop createTopologyView/listTopologyViews, and align skill/docs with the live catalog.

Co-authored-by: Cursor <cursoragent@cursor.com>

packages/netx-topology-mcp/src/netx_topology_mcp/layout_ops/rings.py

@@ -0,0 +1,35 @@
+"""Ring/chain layout entry: dual-hub min-rings first, else UME petals.
+
+- ``min_rings``: two agg hubs + ≥2 parallel corridors → nested ellipse bands
+  (A1-ULU / PLAU↔ATP style). Prefer when structure says ``agg_bar``.
+- ``ume_petals``: rect-perimeter petals around AN anchors (legacy Sugiyama path).
+"""
+
+from __future__ import annotations
+
+from netx_topology_mcp.layout_ops.min_rings import build_min_ring_skeleton
+from netx_topology_mcp.layout_ops.state import LayoutParams, LayoutState, OpResult
+from netx_topology_mcp.layout_ops.sugiyama import build_sugiyama_layout
+
+
+def build_ring_skeleton(state: LayoutState, params: LayoutParams | None = None) -> OpResult:
+    params = params or LayoutParams()
+    dual = build_min_ring_skeleton(state, params)
+    if dual is not None:
+        return OpResult(
+            state=dual.state,
+            moved=dual.moved,
+            op="build_ring_skeleton",
+            params={**(dual.params or {}), "mode": "min_rings"},
+            note=dual.note,
+        )
+    out = build_sugiyama_layout(state, params)
+    st = out.state
+    st.meta["rings_mode"] = st.meta.get("rings_mode") or "ume_petals"
+    return OpResult(
+        state=st,
+        moved=out.moved,
+        op="build_ring_skeleton",
+        params={**(out.params or {}), "mode": st.meta.get("rings_mode", "ume_petals")},
+        note=out.note or "UME petal rect-perimeter skeleton",
+    )