diff --git a/plugin/index.ts b/plugin/index.ts
index 33b02b8..dea52aa 100644
--- a/plugin/index.ts
+++ b/plugin/index.ts
@@ -34,12 +34,18 @@ import path from "node:path";
 import fs from "node:fs";
 import { validateYonexusServerConfig } from "./core/config.js";
 import { createYonexusServerStore } from "./core/store.js";
-import { createServerTransport } from "./core/transport.js";
+import { createServerTransport, type ServerTransport } from "./core/transport.js";
 import { createYonexusServerRuntime } from "./core/runtime.js";
-import { createServerRuleRegistry } from "./core/rules.js";
+import { createServerRuleRegistry, YonexusServerRuleRegistry } from "./core/rules.js";
 import { encodeRuleMessage } from "../../Yonexus.Protocol/src/index.js";
 import type { ServerPersistenceData } from "./core/persistence.js";
 
+const _G = globalThis as Record<string, unknown>;
+const _STARTED_KEY   = "_yonexusServerStarted";
+const _TRANSPORT_KEY = "_yonexusServerTransport";
+const _REGISTRY_KEY  = "_yonexusServerRegistry";
+const _CALLBACKS_KEY = "_yonexusServerOnAuthCallbacks";
+
 export interface YonexusServerPluginManifest {
   readonly name: "Yonexus.Server";
   readonly version: string;
@@ -52,8 +58,6 @@ const manifest: YonexusServerPluginManifest = {
   description: "Yonexus central hub plugin for cross-instance OpenClaw communication"
 };
 
-let _serverStarted = false;
-
 export function createYonexusServerPlugin(api: {
   rootDir: string;
   pluginConfig: unknown;
@@ -138,15 +142,34 @@ export function createYonexusServerPlugin(api: {
       });
   }, { commands: ["yonexus-server"] });
 
-  if (_serverStarted) return;
-  _serverStarted = true;
+  // 1. Ensure shared state survives hot-reload — only initialise when absent
+  if (!(_G[_REGISTRY_KEY] instanceof YonexusServerRuleRegistry)) {
+    _G[_REGISTRY_KEY] = createServerRuleRegistry();
+  }
+  if (!Array.isArray(_G[_CALLBACKS_KEY])) {
+    _G[_CALLBACKS_KEY] = [];
+  }
+
+  const ruleRegistry                  = _G[_REGISTRY_KEY] as YonexusServerRuleRegistry;
+  const onClientAuthenticatedCallbacks = _G[_CALLBACKS_KEY] as Array<(identifier: string) => void>;
+
+  // 2. Refresh the cross-plugin API object every call so that sendRule closure
+  //    always reads the live transport from globalThis.
+  _G["__yonexusServer"] = {
+    ruleRegistry,
+    sendRule: (identifier: string, ruleId: string, content: string): boolean =>
+      (_G[_TRANSPORT_KEY] as ServerTransport | undefined)?.send(identifier, encodeRuleMessage(ruleId, content)) ?? false,
+    onClientAuthenticated: onClientAuthenticatedCallbacks
+  };
+
+  // 3. Start the runtime only once — the globalThis flag survives hot-reload
+  if (_G[_STARTED_KEY]) return;
+  _G[_STARTED_KEY] = true;
 
   const config = validateYonexusServerConfig(api.pluginConfig);
   const store = createYonexusServerStore(stateFilePath);
 
-  const ruleRegistry = createServerRuleRegistry();
-  const onClientAuthenticatedCallbacks: Array<(identifier: string) => void> = [];
-
+  // runtimeRef is local; transport is stored in globalThis so sendRule closures stay valid
   let runtimeRef: ReturnType<typeof createYonexusServerRuntime> | null = null;
   const transport = createServerTransport({
     config,
@@ -161,14 +184,7 @@ export function createYonexusServerPlugin(api: {
       }
     }
   });
-
-  // Expose registry and helpers for other plugins loaded in the same process
-  (globalThis as Record<string, unknown>)["__yonexusServer"] = {
-    ruleRegistry,
-    sendRule: (identifier: string, ruleId: string, content: string): boolean =>
-      transport.send(identifier, encodeRuleMessage(ruleId, content)),
-    onClientAuthenticated: onClientAuthenticatedCallbacks
-  };
+  _G[_TRANSPORT_KEY] = transport;
 
   const runtime = createYonexusServerRuntime({
     config,