diff --git a/src/config/sessions/transcript-mirror.ts b/src/config/sessions/transcript-mirror.ts
new file mode 100644
index 00000000000..7a926b95820
--- /dev/null
+++ b/src/config/sessions/transcript-mirror.ts
@@ -0,0 +1,52 @@
+import path from "node:path";
+
+function stripQuery(value: string): string {
+  const noHash = value.split("#")[0] ?? value;
+  return noHash.split("?")[0] ?? noHash;
+}
+
+function extractFileNameFromMediaUrl(value: string): string | null {
+  const trimmed = value.trim();
+  if (!trimmed) {
+    return null;
+  }
+  const cleaned = stripQuery(trimmed);
+  try {
+    const parsed = new URL(cleaned);
+    const base = path.basename(parsed.pathname);
+    if (!base) {
+      return null;
+    }
+    try {
+      return decodeURIComponent(base);
+    } catch {
+      return base;
+    }
+  } catch {
+    const base = path.basename(cleaned);
+    if (!base || base === "/" || base === ".") {
+      return null;
+    }
+    return base;
+  }
+}
+
+export function resolveMirroredTranscriptText(params: {
+  text?: string;
+  mediaUrls?: string[];
+}): string | null {
+  const mediaUrls = params.mediaUrls?.filter((url) => url && url.trim()) ?? [];
+  if (mediaUrls.length > 0) {
+    const names = mediaUrls
+      .map((url) => extractFileNameFromMediaUrl(url))
+      .filter((name): name is string => Boolean(name && name.trim()));
+    if (names.length > 0) {
+      return names.join(", ");
+    }
+    return "media";
+  }
+
+  const text = params.text ?? "";
+  const trimmed = text.trim();
+  return trimmed ? trimmed : null;
+}
diff --git a/src/config/sessions/transcript.runtime.ts b/src/config/sessions/transcript.runtime.ts
new file mode 100644
index 00000000000..b886816b75c
--- /dev/null
+++ b/src/config/sessions/transcript.runtime.ts
@@ -0,0 +1 @@
+export { appendAssistantMessageToSessionTranscript } from "./transcript.js";
diff --git a/src/config/sessions/transcript.ts b/src/config/sessions/transcript.ts
index aba99d02945..b9d70901962 100644
--- a/src/config/sessions/transcript.ts
+++ b/src/config/sessions/transcript.ts
@@ -11,59 +11,9 @@ import {
 } from "./paths.js";
 import { resolveAndPersistSessionFile } from "./session-file.js";
 import { loadSessionStore, normalizeStoreSessionKey } from "./store.js";
+import { resolveMirroredTranscriptText } from "./transcript-mirror.js";
 import type { SessionEntry } from "./types.js";
 
-function stripQuery(value: string): string {
-  const noHash = value.split("#")[0] ?? value;
-  return noHash.split("?")[0] ?? noHash;
-}
-
-function extractFileNameFromMediaUrl(value: string): string | null {
-  const trimmed = value.trim();
-  if (!trimmed) {
-    return null;
-  }
-  const cleaned = stripQuery(trimmed);
-  try {
-    const parsed = new URL(cleaned);
-    const base = path.basename(parsed.pathname);
-    if (!base) {
-      return null;
-    }
-    try {
-      return decodeURIComponent(base);
-    } catch {
-      return base;
-    }
-  } catch {
-    const base = path.basename(cleaned);
-    if (!base || base === "/" || base === ".") {
-      return null;
-    }
-    return base;
-  }
-}
-
-export function resolveMirroredTranscriptText(params: {
-  text?: string;
-  mediaUrls?: string[];
-}): string | null {
-  const mediaUrls = params.mediaUrls?.filter((url) => url && url.trim()) ?? [];
-  if (mediaUrls.length > 0) {
-    const names = mediaUrls
-      .map((url) => extractFileNameFromMediaUrl(url))
-      .filter((name): name is string => Boolean(name && name.trim()));
-    if (names.length > 0) {
-      return names.join(", ");
-    }
-    return "media";
-  }
-
-  const text = params.text ?? "";
-  const trimmed = text.trim();
-  return trimmed ? trimmed : null;
-}
-
 async function ensureSessionHeader(params: {
   sessionFile: string;
   sessionId: string;
diff --git a/src/infra/outbound/deliver.test-helpers.ts b/src/infra/outbound/deliver.test-helpers.ts
index 73f65bb025a..5760d8c1be2 100644
--- a/src/infra/outbound/deliver.test-helpers.ts
+++ b/src/infra/outbound/deliver.test-helpers.ts
@@ -100,10 +100,10 @@ export const internalHookMocks = _internalHookMocks;
 export const queueMocks = _queueMocks;
 export const logMocks = _logMocks;
 
-vi.mock("../../config/sessions.js", async () => {
-  const actual = await vi.importActual<typeof import("../../config/sessions.js")>(
-    "../../config/sessions.js",
-  );
+vi.mock("../../config/sessions/transcript.runtime.js", async () => {
+  const actual = await vi.importActual<
+    typeof import("../../config/sessions/transcript.runtime.js")
+  >("../../config/sessions/transcript.runtime.js");
   return {
     ...actual,
     appendAssistantMessageToSessionTranscript: _mocks.appendAssistantMessageToSessionTranscript,
diff --git a/src/infra/outbound/deliver.test.ts b/src/infra/outbound/deliver.test.ts
index b314595a5ec..7582c91a268 100644
--- a/src/infra/outbound/deliver.test.ts
+++ b/src/infra/outbound/deliver.test.ts
@@ -41,10 +41,10 @@ const logMocks = vi.hoisted(() => ({
   warn: vi.fn(),
 }));
 
-vi.mock("../../config/sessions.js", async () => {
-  const actual = await vi.importActual<typeof import("../../config/sessions.js")>(
-    "../../config/sessions.js",
-  );
+vi.mock("../../config/sessions/transcript.runtime.js", async () => {
+  const actual = await vi.importActual<
+    typeof import("../../config/sessions/transcript.runtime.js")
+  >("../../config/sessions/transcript.runtime.js");
   return {
     ...actual,
     appendAssistantMessageToSessionTranscript: mocks.appendAssistantMessageToSessionTranscript,
diff --git a/src/infra/outbound/deliver.ts b/src/infra/outbound/deliver.ts
index 0e6cf93d32b..4cf125b107c 100644
--- a/src/infra/outbound/deliver.ts
+++ b/src/infra/outbound/deliver.ts
@@ -15,10 +15,7 @@ import type {
   ChannelOutboundContext,
 } from "../../channels/plugins/types.js";
 import type { OpenClawConfig } from "../../config/config.js";
-import {
-  appendAssistantMessageToSessionTranscript,
-  resolveMirroredTranscriptText,
-} from "../../config/sessions.js";
+import { resolveMirroredTranscriptText } from "../../config/sessions/transcript-mirror.js";
 import { fireAndForgetHook } from "../../hooks/fire-and-forget.js";
 import { createInternalHookEvent, triggerInternalHook } from "../../hooks/internal-hooks.js";
 import {
@@ -49,6 +46,14 @@ export { normalizeOutboundPayloads } from "./payloads.js";
 export { resolveOutboundSendDep, type OutboundSendDeps } from "./send-deps.js";
 
 const log = createSubsystemLogger("outbound/deliver");
+let transcriptRuntimePromise:
+  | Promise<typeof import("../../config/sessions/transcript.runtime.js")>
+  | undefined;
+
+async function loadTranscriptRuntime() {
+  transcriptRuntimePromise ??= import("../../config/sessions/transcript.runtime.js");
+  return await transcriptRuntimePromise;
+}
 
 export type OutboundDeliveryResult = {
   channel: Exclude<OutboundChannel, "none">;
@@ -791,6 +796,7 @@ async function deliverOutboundPayloadsCore(
       mediaUrls: params.mirror.mediaUrls,
     });
     if (mirrorText) {
+      const { appendAssistantMessageToSessionTranscript } = await loadTranscriptRuntime();
       await appendAssistantMessageToSessionTranscript({
         agentId: params.mirror.agentId,
         sessionKey: params.mirror.sessionKey,