diff --git a/README.md b/README.md
index feac4aa..d5ad05c 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,8 @@
 已新增 `nodes` 工具控制平面（PoC）：
 
 - `action=status|describe`：查看已配对节点状态与能力矩阵
-- `action=run|invoke|camera_snap|screen_record|location_get`：已接入路由框架（下一阶段接数据平面传输）
+- `action=run|invoke|camera_snap|screen_record|location_get`：已接入路由框架
+- `mode=auto|p2p|relay`：默认 `auto`（优先 p2p，失败回退 relay）
 
 实现位置：
 - `pkg/nodes/types.go`
diff --git a/README_EN.md b/README_EN.md
index e0893fb..7d5e354 100644
--- a/README_EN.md
+++ b/README_EN.md
@@ -40,7 +40,8 @@ These changes improve stability, observability, and maintainability under concur
 A `nodes` tool control-plane PoC is now available:
 
 - `action=status|describe`: inspect paired node status and capability matrix
-- `action=run|invoke|camera_snap|screen_record|location_get`: routing framework is in place (data-plane bridge lands in next phase)
+- `action=run|invoke|camera_snap|screen_record|location_get`: routing framework is in place
+- `mode=auto|p2p|relay`: default `auto` (prefer p2p, fallback to relay)
 
 Implementation:
 - `pkg/nodes/types.go`
diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index 0e3c3de..9d083c0 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -78,7 +78,8 @@ func NewAgentLoop(cfg *config.Config, msgBus *bus.MessageBus, provider providers
 	toolsRegistry.Register(tools.NewExecTool(cfg.Tools.Shell, workspace, processManager))
 	toolsRegistry.Register(tools.NewProcessTool(processManager))
 	nodesManager := nodes.NewManager()
-	toolsRegistry.Register(tools.NewNodesTool(nodesManager))
+	nodesRouter := &nodes.Router{P2P: &nodes.StubP2PTransport{}, Relay: &nodes.StubRelayTransport{}}
+	toolsRegistry.Register(tools.NewNodesTool(nodesManager, nodesRouter))
 
 	if cs != nil {
 		toolsRegistry.Register(tools.NewRemindTool(cs))
diff --git a/pkg/nodes/transport.go b/pkg/nodes/transport.go
new file mode 100644
index 0000000..bc6a6e5
--- /dev/null
+++ b/pkg/nodes/transport.go
@@ -0,0 +1,66 @@
+package nodes
+
+import (
+	"context"
+	"fmt"
+	"strings"
+)
+
+// Transport abstracts node data-plane delivery.
+type Transport interface {
+	Name() string
+	Send(ctx context.Context, req Request) (Response, error)
+}
+
+// Router prefers p2p transport and falls back to relay.
+type Router struct {
+	P2P   Transport
+	Relay Transport
+}
+
+func (r *Router) Dispatch(ctx context.Context, req Request, mode string) (Response, error) {
+	m := strings.ToLower(strings.TrimSpace(mode))
+	if m == "" {
+		m = "auto"
+	}
+	switch m {
+	case "p2p":
+		if r.P2P == nil {
+			return Response{OK: false, Node: req.Node, Action: req.Action, Error: "p2p transport unavailable"}, nil
+		}
+		return r.P2P.Send(ctx, req)
+	case "relay":
+		if r.Relay == nil {
+			return Response{OK: false, Node: req.Node, Action: req.Action, Error: "relay transport unavailable"}, nil
+		}
+		return r.Relay.Send(ctx, req)
+	default: // auto
+		if r.P2P != nil {
+			if resp, err := r.P2P.Send(ctx, req); err == nil && resp.OK {
+				return resp, nil
+			}
+		}
+		if r.Relay != nil {
+			return r.Relay.Send(ctx, req)
+		}
+		return Response{}, fmt.Errorf("no transport available")
+	}
+}
+
+// StubP2PTransport provides phase-2 negotiation scaffold.
+type StubP2PTransport struct{}
+
+func (s *StubP2PTransport) Name() string { return "p2p" }
+func (s *StubP2PTransport) Send(ctx context.Context, req Request) (Response, error) {
+	_ = ctx
+	return Response{OK: false, Node: req.Node, Action: req.Action, Error: "p2p session not established yet"}, nil
+}
+
+// StubRelayTransport provides executable placeholder until real bridge lands.
+type StubRelayTransport struct{}
+
+func (s *StubRelayTransport) Name() string { return "relay" }
+func (s *StubRelayTransport) Send(ctx context.Context, req Request) (Response, error) {
+	_ = ctx
+	return Response{OK: false, Node: req.Node, Action: req.Action, Error: "relay bridge not implemented yet"}, nil
+}
diff --git a/pkg/tools/nodes_tool.go b/pkg/tools/nodes_tool.go
index 7695bce..05b2898 100644
--- a/pkg/tools/nodes_tool.go
+++ b/pkg/tools/nodes_tool.go
@@ -12,9 +12,10 @@ import (
 // NodesTool provides an OpenClaw-style control surface for paired nodes.
 type NodesTool struct {
 	manager *nodes.Manager
+	router  *nodes.Router
 }
 
-func NewNodesTool(m *nodes.Manager) *NodesTool { return &NodesTool{manager: m} }
+func NewNodesTool(m *nodes.Manager, r *nodes.Router) *NodesTool { return &NodesTool{manager: m, router: r} }
 func (t *NodesTool) Name() string              { return "nodes" }
 func (t *NodesTool) Description() string {
 	return "Manage paired nodes (status/describe/run/invoke/camera/screen/location)."
@@ -23,6 +24,7 @@ func (t *NodesTool) Parameters() map[string]interface{} {
 	return map[string]interface{}{"type": "object", "properties": map[string]interface{}{
 		"action": map[string]interface{}{"type": "string", "description": "status|describe|run|invoke|camera_snap|screen_record|location_get"},
 		"node":   map[string]interface{}{"type": "string", "description": "target node id"},
+		"mode":   map[string]interface{}{"type": "string", "description": "auto|p2p|relay (default auto)"},
 		"args":   map[string]interface{}{"type": "object", "description": "action args"},
 	}, "required": []string{"action"}}
 }
@@ -35,6 +37,7 @@ func (t *NodesTool) Execute(ctx context.Context, args map[string]interface{}) (s
 		return "", fmt.Errorf("action is required")
 	}
 	nodeID, _ := args["node"].(string)
+	mode, _ := args["mode"].(string)
 	if t.manager == nil {
 		return "", fmt.Errorf("nodes manager not configured")
 	}
@@ -52,7 +55,6 @@ func (t *NodesTool) Execute(ctx context.Context, args map[string]interface{}) (s
 		b, _ := json.Marshal(t.manager.List())
 		return string(b), nil
 	default:
-		// Phase-1: control-plane exists, data-plane RPC bridge lands in next step.
 		if nodeID == "" {
 			if picked, ok := t.manager.PickFor(action); ok {
 				nodeID = picked.ID
@@ -61,7 +63,17 @@ func (t *NodesTool) Execute(ctx context.Context, args map[string]interface{}) (s
 		if nodeID == "" {
 			return "", fmt.Errorf("no eligible node found for action=%s", action)
 		}
-		resp := nodes.Response{OK: false, Node: nodeID, Action: action, Error: "node transport bridge not implemented yet"}
+		if t.router == nil {
+			return "", fmt.Errorf("nodes transport router not configured")
+		}
+		var reqArgs map[string]interface{}
+		if raw, ok := args["args"].(map[string]interface{}); ok {
+			reqArgs = raw
+		}
+		resp, err := t.router.Dispatch(ctx, nodes.Request{Action: action, Node: nodeID, Args: reqArgs}, mode)
+		if err != nil {
+			return "", err
+		}
 		b, _ := json.Marshal(resp)
 		return string(b), nil
 	}