diff --git a/plugins/hermes-zhiyi/__init__.py b/plugins/hermes-zhiyi/__init__.py
index e8512f1..01dc089 100644
--- a/plugins/hermes-zhiyi/__init__.py
+++ b/plugins/hermes-zhiyi/__init__.py
@@ -228,6 +228,33 @@ class ZhiYiClient:
             logger.warning("ZhiYi search_notes error: %s", e)
             return []
 
+    def graph_navigate(self, entity: str, max_hops: int = 2,
+                       namespace: Optional[str] = None) -> Dict[str, Any]:
+        """图谱导航：查询实体的 N 跳关系网络。返回 {entity, count, paths}。"""
+        try:
+            payload = {"entity": entity, "max_hops": max_hops}
+            if namespace:
+                payload["namespace"] = namespace
+            r = self._session.post(self._url("/api/v1/graph/navigate"), json=payload, timeout=self.timeout)
+            if r.status_code == 200:
+                return r.json()
+            logger.warning("ZhiYi graph_navigate failed: %s %s", r.status_code, r.text[:200])
+            return {}
+        except Exception as e:
+            logger.warning("ZhiYi graph_navigate error: %s", e)
+            return {}
+
+    def graph_stats(self) -> Dict[str, Any]:
+        """获取图谱统计：节点数、边数、密度。"""
+        try:
+            r = self._session.get(self._url("/api/v1/graph/stats"), timeout=self.timeout)
+            if r.status_code == 200:
+                return r.json()
+            return {}
+        except Exception as e:
+            logger.warning("ZhiYi graph_stats error: %s", e)
+            return {}
+
 
 # ── Memory Provider ──────────────────────────────────────────────────────────
 
@@ -536,6 +563,33 @@ class HermesZhiYiMemoryProvider(MemoryProvider):
                     "properties": {},
                 },
             },
+            {
+                "name": "memory_graph_navigate",
+                "description": "Navigate the ZhiYi knowledge graph to understand relationships around an entity. Shows N-hop relationship network — what concepts, people, or projects are connected, and how. Use when: analyzing project structure, understanding who/what is related to a topic, exploring context dependencies.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {
+                        "entity": {
+                            "type": "string",
+                            "description": "The central entity to navigate from (e.g. '牧尘', '织忆', '小唯', 'openclaw'). Chinese and English both work.",
+                        },
+                        "max_hops": {
+                            "type": "integer",
+                            "description": "Maximum path depth (default: 2). 1-hop = direct neighbors only; 2-hop = friends-of-friends. Larger values return more paths but are slower.",
+                            "default": 2,
+                        },
+                    },
+                    "required": ["entity"],
+                },
+            },
+            {
+                "name": "memory_graph_stats",
+                "description": "Get ZhiYi knowledge graph statistics: total nodes, edges, and graph density. Use to check graph size and health.",
+                "parameters": {
+                    "type": "object",
+                    "properties": {},
+                },
+            },
         ]
 
     def handle_tool_call(self, tool_name: str, args: Dict[str, Any], **kwargs) -> str:
@@ -550,6 +604,11 @@ class HermesZhiYiMemoryProvider(MemoryProvider):
             return self._tool_memory_metrics()
         elif tool_name == "memory_stats":
             return self._tool_memory_stats()
+        elif tool_name == "memory_graph_navigate":
+            return self._tool_memory_graph_navigate(
+                args.get("entity", ""), args.get("max_hops", 2))
+        elif tool_name == "memory_graph_stats":
+            return self._tool_memory_graph_stats()
         return tool_error(tool_name, "Unknown tool")
 
     # ── Tool handlers ─────────────────────────────────────────────────────────
@@ -617,6 +676,55 @@ class HermesZhiYiMemoryProvider(MemoryProvider):
             return json.dumps({"success": False, "error": "Could not reach ZhiYi /metrics/self"})
         return json.dumps({"success": True, "metrics": metrics})
 
+    def _tool_memory_graph_navigate(self, entity: str, max_hops: int) -> str:
+        """图谱导航：查询实体的 N 跳关系网络。"""
+        if not self._client:
+            return json.dumps({"success": False, "error": "ZhiYi client not initialized"})
+        if not entity or len(entity.strip()) < 1:
+            return json.dumps({"success": False, "error": "entity is required"})
+        if max_hops < 1:
+            max_hops = 1
+        if max_hops > 5:
+            max_hops = 5
+
+        result = self._client.graph_navigate(entity.strip(), max_hops=max_hops)
+        if not result:
+            return json.dumps({"success": False, "error": "Graph navigate failed — check ZhiYi server logs"})
+
+        # 格式化路径输出，保留关键信息
+        paths = result.get("paths", [])
+        formatted_paths = []
+        for p in paths[:50]:  # 最多返回50条路径，避免太长
+            formatted_paths.append({
+                "from": p.get("from", ""),
+                "relation": p.get("relation", ""),
+                "to": p.get("to", ""),
+                "hop": p.get("hop", 1),
+                "weight": round(p.get("weight", 0), 3),
+            })
+
+        return json.dumps({
+            "success": True,
+            "entity": result.get("entity", entity),
+            "bidirectional": result.get("bidirectional", False),
+            "count": result.get("count", len(formatted_paths)),
+            "paths": formatted_paths,
+            "message": f"Found {result.get('count', 0)} paths within {max_hops}-hop network",
+        })
+
+    def _tool_memory_graph_stats(self) -> str:
+        """获取图谱统计：节点数、边数、密度。"""
+        if not self._client:
+            return json.dumps({"success": False, "error": "ZhiYi client not initialized"})
+        stats = self._client.graph_stats()
+        if not stats:
+            return json.dumps({"success": False, "error": "Could not reach ZhiYi /graph/stats"})
+        return json.dumps({
+            "success": True,
+            "stats": stats,
+            "message": f"Graph has {stats.get('node_count', 0)} nodes and {stats.get('edge_count', 0)} edges (density: {stats.get('density', 0):.4f})",
+        })
+
     # ── Session management ────────────────────────────────────────────────────
 
     def on_session_switch(self, new_session_id: str, *, parent_session_id: str = "", reset: bool = False, **kwargs) -> None:
@@ -635,10 +743,14 @@ class HermesZhiYiMemoryProvider(MemoryProvider):
         return (
             "\\n[ZhiYi Memory] You have access to ZhiYi MemoryWeave — a semantic memory system with knowledge graph.\\n"
             "Your prefetch automatically retrieves: (1) relevant semantic memories, (2) Obsidian notes related via graph navigation.\\n"
-            "Use memory_search to recall past facts, decisions, and context before answering.\\n"
-            "Use memory_write to save important information the user tells you.\\n"
-            "Use memory_feedback to mark memories as useful/not-useful — this drives self-optimization.\\n"
-            "Use memory_metrics to check memory system health (recall hit rate, gap closures, etc.).\\n"
+            "Tools available:\\n"
+            "  memory_search — semantic search for relevant past information\\n"
+            "  memory_write — save an important fact or preference\\n"
+            "  memory_feedback — mark memories as useful/not-useful (drives self-optimization)\\n"
+            "  memory_metrics — check memory system health (recall hit rate, gap closures, etc.)\\n"
+            "  memory_stats — get memory statistics (total docs, vector dimensions)\\n"
+            "  memory_graph_navigate — navigate the knowledge graph to understand entity relationships (N-hop network)\\n"
+            "  memory_graph_stats — get knowledge graph statistics (nodes, edges, density)\\n"
         )
 
 
diff --git a/plugins/hermes-zhiyi/plugin.yaml b/plugins/hermes-zhiyi/plugin.yaml
index 6fc032b..2b6fc18 100644
--- a/plugins/hermes-zhiyi/plugin.yaml
+++ b/plugins/hermes-zhiyi/plugin.yaml
@@ -1,6 +1,6 @@
 name: hermes-zhiyi
-version: 1.0.0
-description: Bridge to ZhiYi MemoryWeave — bge-m3 1024-dim semantic memory with FAISS + bge-reranker-v2-m3. Replaces local lanceDB with shared ZhiYi server.
+version: 1.1.0
+description: "Bridge to ZhiYi MemoryWeave - bge-m3 1024-dim semantic memory with FAISS + bge-reranker. Replaces local lanceDB with shared ZhiYi server. Now includes knowledge graph tools: memory_graph_navigate and memory_graph_stats."
 provider: zhiyi
 entry: __init__.register
 memory_provider: true
\ No newline at end of file