diff --git a/extensions/irc/src/active-clients.ts b/extensions/irc/src/active-clients.ts
new file mode 100644
index 00000000000..cd960e201be
--- /dev/null
+++ b/extensions/irc/src/active-clients.ts
@@ -0,0 +1,35 @@
+import type { IrcClient } from "./client.js";
+
+/**
+ * Registry of active IRC clients from the monitor.
+ * Keyed by accountId. Allows sendMessageIrc to use the persistent
+ * monitor client instead of creating a transient connection.
+ */
+const activeClients = new Map<string, IrcClient>();
+
+export function setActiveClient(accountId: string, client: IrcClient): void {
+  activeClients.set(accountId, client);
+}
+
+export function getActiveClient(accountId: string): IrcClient | undefined {
+  const client = activeClients.get(accountId);
+  if (client && client.isReady()) {
+    return client;
+  }
+  return undefined;
+}
+
+export function removeActiveClient(accountId: string): void {
+  activeClients.delete(accountId);
+}
+
+/**
+ * Only remove the active client if it matches the expected instance.
+ * Prevents a stopping monitor from deregistering a newer monitor's
+ * healthy client during reconnect races.
+ */
+export function removeActiveClientIfMatch(accountId: string, expected: IrcClient): void {
+  if (activeClients.get(accountId) === expected) {
+    activeClients.delete(accountId);
+  }
+}
diff --git a/extensions/irc/src/monitor.ts b/extensions/irc/src/monitor.ts
index 2a75b76ee08..6eb487f586f 100644
--- a/extensions/irc/src/monitor.ts
+++ b/extensions/irc/src/monitor.ts
@@ -1,5 +1,6 @@
 import { resolveLoggerBackedRuntime } from "openclaw/plugin-sdk/extension-shared";
 import { resolveIrcAccount } from "./accounts.js";
+import { setActiveClient, removeActiveClientIfMatch } from "./active-clients.js";
 import { connectIrcClient, type IrcClient } from "./client.js";
 import { buildIrcConnectOptions } from "./connect-options.js";
 import { handleIrcInbound } from "./inbound.js";
@@ -136,8 +137,13 @@ export async function monitorIrcProvider(opts: IrcMonitorOptions): Promise<{ sto
     `[${account.accountId}] connected to ${account.host}:${account.port}${account.tls ? " (tls)" : ""} as ${client.nick}`,
   );
 
+  setActiveClient(account.accountId, client);
+
   return {
     stop: () => {
+      if (client) {
+        removeActiveClientIfMatch(account.accountId, client);
+      }
       client?.quit("shutdown");
       client = null;
     },
diff --git a/extensions/irc/src/send.ts b/extensions/irc/src/send.ts
index 544f81f3f47..8b832cf1e28 100644
--- a/extensions/irc/src/send.ts
+++ b/extensions/irc/src/send.ts
@@ -1,4 +1,5 @@
 import { resolveIrcAccount } from "./accounts.js";
+import { getActiveClient } from "./active-clients.js";
 import type { IrcClient } from "./client.js";
 import { connectIrcClient } from "./client.js";
 import { buildIrcConnectOptions } from "./connect-options.js";
@@ -67,13 +68,19 @@ export async function sendMessageIrc(
   if (client?.isReady()) {
     client.sendPrivmsg(target, payload);
   } else {
-    const transient = await connectIrcClient(
-      buildIrcConnectOptions(account, {
-        connectTimeoutMs: 12000,
-      }),
-    );
-    transient.sendPrivmsg(target, payload);
-    transient.quit("sent");
+    // Try the monitor's persistent client first (already connected and joined to channels)
+    const active = getActiveClient(account.accountId);
+    if (active) {
+      active.sendPrivmsg(target, payload);
+    } else {
+      const transient = await connectIrcClient(
+        buildIrcConnectOptions(account, {
+          connectTimeoutMs: 12000,
+        }),
+      );
+      transient.sendPrivmsg(target, payload);
+      transient.quit("sent");
+    }
   }
 
   runtime.channel.activity.record({