fix(regression): restore imessage cold-runtime chunking

extensions/imessage/runtime-api.ts

@@ -3,6 +3,7 @@ export {
   PAIRING_APPROVED_MESSAGE,
   buildComputedAccountStatusSnapshot,
   buildChannelConfigSchema,
+  chunkTextForOutbound,
   collectStatusIssuesFromLastError,
   formatTrimmedAllowFromEntries,
   getChatChannelMeta,

extensions/imessage/src/channel.outbound.test.ts

@@ -21,6 +21,14 @@ function requireIMessageSendMedia() {
   return sendMedia;
 }
 
+function requireIMessageChunker() {
+  const chunker = imessagePlugin.outbound?.chunker;
+  if (!chunker) {
+    throw new Error("imessage outbound.chunker unavailable");
+  }
+  return chunker;
+}
+
 const requestMock = vi.fn();
 const stopMock = vi.fn();
 
@@ -184,6 +192,13 @@ describe("imessagePlugin outbound", () => {
       sendIMessage,
     });
   });
+
+  it("chunks outbound text without requiring iMessage runtime initialization", () => {
+    const chunker = requireIMessageChunker();
+
+    expect(() => chunker("hello world", 5)).not.toThrow();
+    expect(chunker("hello world", 5)).toEqual(["hello", "world"]);
+  });
 });
 
 describe("imessageOutbound", () => {

extensions/imessage/src/channel.ts

@@ -9,6 +9,7 @@ import {
   createDefaultChannelRuntimeState,
 } from "openclaw/plugin-sdk/status-helpers";
 import {
+  chunkTextForOutbound,
   collectStatusIssuesFromLastError,
   DEFAULT_ACCOUNT_ID,
   formatTrimmedAllowFromEntries,
@@ -21,7 +22,6 @@ import {
   resolveIMessageGroupToolPolicy,
 } from "./group-policy.js";
 import type { IMessageProbe } from "./probe.js";
-import { getIMessageRuntime } from "./runtime.js";
 import { imessageSetupAdapter } from "./setup-core.js";
 import {
   createIMessagePluginBase,
@@ -194,7 +194,7 @@ export const imessagePlugin: ChannelPlugin<ResolvedIMessageAccount, IMessageProb
     outbound: {
       base: {
         deliveryMode: "direct",
-        chunker: (text, limit) => getIMessageRuntime().channel.text.chunkText(text, limit),
+        chunker: chunkTextForOutbound,
         chunkerMode: "text",
         textChunkLimit: 4000,
       },

src/plugin-sdk/imessage.ts

@@ -51,6 +51,7 @@ export {
 export { IMessageConfigSchema } from "../config/zod-schema.providers-core.js";
 
 export { resolveChannelMediaMaxBytes } from "../channels/plugins/media-limits.js";
+export { chunkTextForOutbound } from "./text-chunking.js";
 export {
   buildComputedAccountStatusSnapshot,
   collectStatusIssuesFromLastError,