diff --git a/extensions/irc/src/channel.test.ts b/extensions/irc/src/channel.test.ts
index a6df034edc0..258eebe0672 100644
--- a/extensions/irc/src/channel.test.ts
+++ b/extensions/irc/src/channel.test.ts
@@ -1,5 +1,5 @@
 import { afterEach, describe, expect, it } from "vitest";
-import { ircPlugin } from "./channel.js";
+import { ircOutboundBaseAdapter } from "./outbound-base.js";
 import { clearIrcRuntime } from "./runtime.js";
 
 describe("irc outbound chunking", () => {
@@ -8,11 +8,9 @@ describe("irc outbound chunking", () => {
   });
 
   it("chunks outbound text without requiring IRC runtime initialization", () => {
-    const chunker = ircPlugin.outbound?.chunker;
-    if (!chunker) {
-      throw new Error("irc outbound.chunker unavailable");
-    }
-
-    expect(chunker("alpha beta", 5)).toEqual(["alpha", "beta"]);
+    expect(ircOutboundBaseAdapter.chunker("alpha beta", 5)).toEqual(["alpha", "beta"]);
+    expect(ircOutboundBaseAdapter.deliveryMode).toBe("direct");
+    expect(ircOutboundBaseAdapter.chunkerMode).toBe("markdown");
+    expect(ircOutboundBaseAdapter.textChunkLimit).toBe(350);
   });
 });
diff --git a/extensions/irc/src/channel.ts b/extensions/irc/src/channel.ts
index 7835394039f..ede728ab31e 100644
--- a/extensions/irc/src/channel.ts
+++ b/extensions/irc/src/channel.ts
@@ -14,7 +14,6 @@ import {
   createChannelDirectoryAdapter,
   createResolvedDirectoryEntriesLister,
 } from "openclaw/plugin-sdk/directory-runtime";
-import { sanitizeForPlainText } from "openclaw/plugin-sdk/outbound-runtime";
 import {
   createComputedAccountStatusAdapter,
   createDefaultChannelRuntimeState,
@@ -27,7 +26,6 @@ import {
 } from "./accounts.js";
 import {
   buildBaseChannelStatusSummary,
-  chunkTextForOutbound,
   DEFAULT_ACCOUNT_ID,
   PAIRING_APPROVED_MESSAGE,
   type ChannelPlugin,
@@ -41,6 +39,7 @@ import {
   normalizeIrcAllowEntry,
   normalizeIrcMessagingTarget,
 } from "./normalize.js";
+import { ircOutboundBaseAdapter } from "./outbound-base.js";
 import { resolveIrcGroupMatch, resolveIrcRequireMention } from "./policy.js";
 import { probeIrc } from "./probe.js";
 import { collectRuntimeConfigAssignments, secretTargetRegistryEntries } from "./secret-contract.js";
@@ -342,13 +341,7 @@ export const ircPlugin: ChannelPlugin<ResolvedIrcAccount, IrcProbe> = createChat
     collectWarnings: collectIrcSecurityWarnings,
   },
   outbound: {
-    base: {
-      deliveryMode: "direct",
-      chunker: chunkTextForOutbound,
-      chunkerMode: "markdown",
-      textChunkLimit: 350,
-      sanitizeText: ({ text }) => sanitizeForPlainText(text),
-    },
+    base: ircOutboundBaseAdapter,
     attachedResults: {
       channel: "irc",
       sendText: async ({ cfg, to, text, accountId, replyToId }) => {
diff --git a/extensions/irc/src/outbound-base.ts b/extensions/irc/src/outbound-base.ts
new file mode 100644
index 00000000000..6e453b3fdc4
--- /dev/null
+++ b/extensions/irc/src/outbound-base.ts
@@ -0,0 +1,10 @@
+import { sanitizeForPlainText } from "openclaw/plugin-sdk/outbound-runtime";
+import { chunkTextForOutbound } from "./channel-api.js";
+
+export const ircOutboundBaseAdapter = {
+  deliveryMode: "direct" as const,
+  chunker: chunkTextForOutbound,
+  chunkerMode: "markdown" as const,
+  textChunkLimit: 350,
+  sanitizeText: ({ text }: { text: string }) => sanitizeForPlainText(text),
+};