diff --git a/plugin/index.ts b/plugin/index.ts
index b006bd1..7054776 100644
--- a/plugin/index.ts
+++ b/plugin/index.ts
@@ -43,8 +43,14 @@ import path from "node:path";
 import { validateYonexusClientConfig } from "./core/config.js";
 import { createYonexusClientStateStore } from "./core/state.js";
 import { createClientTransport } from "./core/transport.js";
-import { createYonexusClientRuntime } from "./core/runtime.js";
-import { createClientRuleRegistry } from "./core/rules.js";
+import { createYonexusClientRuntime, type YonexusClientRuntime } from "./core/runtime.js";
+import { createClientRuleRegistry, YonexusClientRuleRegistry } from "./core/rules.js";
+
+const _G = globalThis as Record<string, unknown>;
+const _STARTED_KEY   = "_yonexusClientStarted";
+const _RUNTIME_KEY   = "_yonexusClientRuntime";
+const _REGISTRY_KEY  = "_yonexusClientRegistry";
+const _CALLBACKS_KEY = "_yonexusClientOnAuthCallbacks";
 
 export interface YonexusClientPluginManifest {
   readonly name: "Yonexus.Client";
@@ -58,41 +64,48 @@ const manifest: YonexusClientPluginManifest = {
   description: "Yonexus client plugin for cross-instance OpenClaw communication"
 };
 
-let _clientStarted = false;
-
 export function createYonexusClientPlugin(api: { rootDir: string; pluginConfig: unknown }): void {
-  if (_clientStarted) return;
-  _clientStarted = true;
+  // 1. Ensure shared state survives hot-reload — only initialise when absent
+  if (!(_G[_REGISTRY_KEY] instanceof YonexusClientRuleRegistry)) {
+    _G[_REGISTRY_KEY] = createClientRuleRegistry();
+  }
+  if (!Array.isArray(_G[_CALLBACKS_KEY])) {
+    _G[_CALLBACKS_KEY] = [];
+  }
+
+  const ruleRegistry         = _G[_REGISTRY_KEY] as YonexusClientRuleRegistry;
+  const onAuthenticatedCallbacks = _G[_CALLBACKS_KEY] as Array<() => void>;
+
+  // 2. Refresh the cross-plugin API object every call so that sendRule / submitPairingCode
+  //    closures always read the live runtime from globalThis.
+  _G["__yonexusClient"] = {
+    ruleRegistry,
+    sendRule: (ruleId: string, content: string): boolean =>
+      (_G[_RUNTIME_KEY] as YonexusClientRuntime | undefined)?.sendRuleMessage(ruleId, content) ?? false,
+    submitPairingCode: (code: string): boolean =>
+      (_G[_RUNTIME_KEY] as YonexusClientRuntime | undefined)?.submitPairingCode(code) ?? false,
+    onAuthenticated: onAuthenticatedCallbacks
+  };
+
+  // 3. Start the runtime only once — the globalThis flag survives hot-reload
+  if (_G[_STARTED_KEY]) return;
+  _G[_STARTED_KEY] = true;
 
   const config = validateYonexusClientConfig(api.pluginConfig);
   const stateStore = createYonexusClientStateStore(path.join(api.rootDir, "state.json"));
 
-  const ruleRegistry = createClientRuleRegistry();
-  const onAuthenticatedCallbacks: Array<() => void> = [];
-
-  let runtimeRef: ReturnType<typeof createYonexusClientRuntime> | null = null;
   const transport = createClientTransport({
     config,
     onMessage: (msg) => {
-      runtimeRef?.handleMessage(msg).catch((err: unknown) => {
+      (_G[_RUNTIME_KEY] as YonexusClientRuntime | undefined)?.handleMessage(msg).catch((err: unknown) => {
         console.error("[yonexus-client] message handler error:", err);
       });
     },
     onStateChange: (state) => {
-      runtimeRef?.handleTransportStateChange(state);
+      (_G[_RUNTIME_KEY] as YonexusClientRuntime | undefined)?.handleTransportStateChange(state);
     }
   });
 
-  // Expose registry and helpers for other plugins loaded in the same process
-  (globalThis as Record<string, unknown>)["__yonexusClient"] = {
-    ruleRegistry,
-    sendRule: (ruleId: string, content: string): boolean =>
-      runtimeRef?.sendRuleMessage(ruleId, content) ?? false,
-    submitPairingCode: (code: string): boolean =>
-      runtimeRef?.submitPairingCode(code) ?? false,
-    onAuthenticated: onAuthenticatedCallbacks
-  };
-
   const runtime = createYonexusClientRuntime({
     config,
     transport,
@@ -102,7 +115,7 @@ export function createYonexusClientPlugin(api: { rootDir: string; pluginConfig:
       for (const cb of onAuthenticatedCallbacks) cb();
     }
   });
-  runtimeRef = runtime;
+  _G[_RUNTIME_KEY] = runtime;
 
   const shutdown = (): void => {
     runtime.stop().catch((err: unknown) => {