diff --git a/extensions/discord/src/voice/log-preview.test.ts b/extensions/discord/src/voice/log-preview.test.ts
new file mode 100644
index 00000000000..04e01161312
--- /dev/null
+++ b/extensions/discord/src/voice/log-preview.test.ts
@@ -0,0 +1,13 @@
+import { describe, expect, it } from "vitest";
+import { formatVoiceLogPreview } from "./log-preview.js";
+
+describe("formatVoiceLogPreview", () => {
+  it("collapses whitespace and trims the preview", () => {
+    expect(formatVoiceLogPreview("  hello \n world\t")).toBe("hello world");
+  });
+
+  it("truncates long previews after 500 characters", () => {
+    const preview = formatVoiceLogPreview("x".repeat(501));
+    expect(preview).toBe(`${"x".repeat(500)}...`);
+  });
+});
diff --git a/extensions/discord/src/voice/log-preview.ts b/extensions/discord/src/voice/log-preview.ts
new file mode 100644
index 00000000000..dccb618343a
--- /dev/null
+++ b/extensions/discord/src/voice/log-preview.ts
@@ -0,0 +1,9 @@
+const DISCORD_VOICE_LOG_PREVIEW_CHARS = 500;
+
+export function formatVoiceLogPreview(text: string): string {
+  const oneLine = text.replace(/\s+/g, " ").trim();
+  if (oneLine.length <= DISCORD_VOICE_LOG_PREVIEW_CHARS) {
+    return oneLine;
+  }
+  return `${oneLine.slice(0, DISCORD_VOICE_LOG_PREVIEW_CHARS)}...`;
+}
diff --git a/extensions/discord/src/voice/manager.ts b/extensions/discord/src/voice/manager.ts
index 6946caa4e6c..76d3355e7c8 100644
--- a/extensions/discord/src/voice/manager.ts
+++ b/extensions/discord/src/voice/manager.ts
@@ -35,6 +35,7 @@ import {
   resolveDiscordVoiceIngressContext,
   runDiscordVoiceAgentTurn,
 } from "./ingress.js";
+import { formatVoiceLogPreview } from "./log-preview.js";
 import {
   DiscordRealtimeVoiceSession,
   type DiscordVoiceMode,
@@ -67,7 +68,6 @@ import {
 import { DiscordVoiceSpeakerContextResolver } from "./speaker-context.js";
 
 const logger = createSubsystemLogger("discord/voice");
-const VOICE_LOG_PREVIEW_CHARS = 500;
 const FOLLOW_USERS_RECONCILE_INTERVAL_MS = 10_000;
 const FOLLOW_USERS_RECONCILE_MAX_GUILDS_PER_RUN = 4;
 const FOLLOW_USERS_RECONCILE_MAX_REST_LOOKUPS_PER_RUN = 32;
@@ -96,14 +96,6 @@ type VoiceChannelResidency = {
   channelId: string;
 };
 
-function formatVoiceLogPreview(text: string): string {
-  const oneLine = text.replace(/\s+/g, " ").trim();
-  if (oneLine.length <= VOICE_LOG_PREVIEW_CHARS) {
-    return oneLine;
-  }
-  return `${oneLine.slice(0, VOICE_LOG_PREVIEW_CHARS)}...`;
-}
-
 function isVoiceConnectionDestroyed(
   connection: DiscordVoiceConnection,
   voiceSdk: DiscordVoiceSdk,
diff --git a/extensions/discord/src/voice/realtime.ts b/extensions/discord/src/voice/realtime.ts
index 04b00d447ba..7e09d9d3efa 100644
--- a/extensions/discord/src/voice/realtime.ts
+++ b/extensions/discord/src/voice/realtime.ts
@@ -51,6 +51,7 @@ import {
   convertDiscordPcm48kStereoToRealtimePcm24kMono,
   convertRealtimePcm24kMonoToDiscordPcm48kStereo,
 } from "./audio.js";
+import { formatVoiceLogPreview } from "./log-preview.js";
 import { formatVoiceIngressPrompt } from "./prompt.js";
 import { loadDiscordVoiceSdk } from "./sdk-runtime.js";
 import {
@@ -81,7 +82,6 @@ const DISCORD_REALTIME_RECENT_AGENT_PROXY_CONSULT_LIMIT = 16;
 const DISCORD_REALTIME_RECENT_AGENT_PROXY_CONSULT_TTL_MS = 15_000;
 const DISCORD_REALTIME_IGNORED_WAKE_NAME_CONTEXT_TTL_MS = 10_000;
 const DISCORD_REALTIME_WAKE_NAME_FOLLOWUP_TTL_MS = 10_000;
-const DISCORD_REALTIME_LOG_PREVIEW_CHARS = 500;
 const DISCORD_REALTIME_DEFAULT_MIN_BARGE_IN_AUDIO_END_MS = 250;
 const DISCORD_REALTIME_FORCED_CONSULT_FALLBACK_DELAY_MS = 200;
 const DISCORD_REALTIME_DUPLICATE_ERROR_SUPPRESS_MS = 60_000;
@@ -139,14 +139,6 @@ type AgentProxyConsultState = {
 
 type AgentProxyConsultHandle = RealtimeVoiceForcedConsultHandle<AgentProxyConsultState>;
 
-function formatRealtimeLogPreview(text: string): string {
-  const oneLine = text.replace(/\s+/g, " ").trim();
-  if (oneLine.length <= DISCORD_REALTIME_LOG_PREVIEW_CHARS) {
-    return oneLine;
-  }
-  return `${oneLine.slice(0, DISCORD_REALTIME_LOG_PREVIEW_CHARS)}...`;
-}
-
 function formatRealtimeInterruptionLog(event: RealtimeVoiceBridgeEvent): string | undefined {
   const detail = event.detail ? ` ${event.detail}` : "";
   if (event.direction === "client") {
@@ -522,7 +514,7 @@ export class DiscordRealtimeVoiceSession implements VoiceRealtimeSession {
       onTranscript: (role, text, isFinal) => {
         if (isFinal && text.trim()) {
           logger.info(
-            `discord voice: realtime ${role} transcript (${text.length} chars): ${formatRealtimeLogPreview(text)}`,
+            `discord voice: realtime ${role} transcript (${text.length} chars): ${formatVoiceLogPreview(text)}`,
           );
         }
         if (isFinal && role === "assistant") {
@@ -1420,7 +1412,7 @@ export class DiscordRealtimeVoiceSession implements VoiceRealtimeSession {
     if (skipReason) {
       const context = this.consumePendingSpeakerContext();
       logger.info(
-        `discord voice: realtime forced agent consult skipped reason=${skipReason} chars=${question.length} speaker=${context?.speakerLabel ?? "unknown"} transcript=${formatRealtimeLogPreview(question)}`,
+        `discord voice: realtime forced agent consult skipped reason=${skipReason} chars=${question.length} speaker=${context?.speakerLabel ?? "unknown"} transcript=${formatVoiceLogPreview(question)}`,
       );
       return undefined;
     }
diff --git a/extensions/discord/src/voice/segment.ts b/extensions/discord/src/voice/segment.ts
index 48daae39295..7a80388e1c8 100644
--- a/extensions/discord/src/voice/segment.ts
+++ b/extensions/discord/src/voice/segment.ts
@@ -8,6 +8,7 @@ import { formatErrorMessage } from "openclaw/plugin-sdk/ssrf-runtime";
 import { maybeControlDiscordVoiceAgentRun } from "./agent-control.js";
 import { createDiscordOpusPlaybackStream } from "./audio.js";
 import { resolveDiscordVoiceIngressContext, runDiscordVoiceAgentTurn } from "./ingress.js";
+import { formatVoiceLogPreview } from "./log-preview.js";
 import { formatVoiceIngressPrompt } from "./prompt.js";
 import { loadDiscordVoiceSdk } from "./sdk-runtime.js";
 import {
@@ -19,17 +20,8 @@ import {
 import type { DiscordVoiceSpeakerContextResolver } from "./speaker-context.js";
 import { synthesizeVoiceReplyAudio, transcribeVoiceAudio } from "./tts.js";
 
-const VOICE_TRANSCRIPT_LOG_PREVIEW_CHARS = 500;
 const logger = createSubsystemLogger("discord/voice");
 
-function formatVoiceTranscriptLogPreview(text: string): string {
-  const oneLine = text.replace(/\s+/g, " ").trim();
-  if (oneLine.length <= VOICE_TRANSCRIPT_LOG_PREVIEW_CHARS) {
-    return oneLine;
-  }
-  return `${oneLine.slice(0, VOICE_TRANSCRIPT_LOG_PREVIEW_CHARS)}...`;
-}
-
 export async function processDiscordVoiceSegment(params: {
   entry: VoiceSessionEntry;
   wavPath: string;
@@ -78,7 +70,7 @@ export async function processDiscordVoiceSegment(params: {
     `transcription ok (${transcript.length} chars): guild ${entry.guildId} channel ${entry.channelId}`,
   );
   logVoiceVerbose(
-    `transcript from ${ingress.speakerLabel} (${userId}) in guild ${entry.guildId} channel ${entry.channelId}: ${formatVoiceTranscriptLogPreview(transcript)}`,
+    `transcript from ${ingress.speakerLabel} (${userId}) in guild ${entry.guildId} channel ${entry.channelId}: ${formatVoiceLogPreview(transcript)}`,
   );
   if (params.transcripts) {
     await params.transcripts.onUtterance({