fix(discord): degrade audioAsVoice to media attachment when voice adapter unavailable

JulyanXu · JulyanXu · commit b1ba78097d18 · 2026-05-22T10:03:57.000+08:00
When messages.tts.auto is set to "always", the TTS pipeline sets audioAsVoice=true on reply payloads. The outbound adapter then tried to route through discordVoice, falling back to sendVoiceMessageDiscord runtime. In cron delivery contexts where no voice channel connection exists, this fallback fails with "discordVoice outbound adapter is unavailable". Instead of falling back to the voice runtime (which cannot work without a voice connection), degrade gracefully: when the discordVoice dep is unavailable, fall through to the existing text+media delivery path which sends audio as a file attachment to the text channel. Closes #84952
diff --git a/extensions/discord/src/outbound-adapter.ts b/extensions/discord/src/outbound-adapter.ts
@@ -230,19 +230,20 @@ export const discordOutbound: ChannelOutboundAdapter = {
       const formattingOptions = resolveDiscordFormattingOptions({ formatting });
       if (audioAsVoice && mediaUrl) {
         const sendVoice =
-          resolveOutboundSendDep<DiscordVoiceSendFn>(deps, "discordVoice") ??
-          (await loadDiscordSendRuntime()).sendVoiceMessageDiscord;
-        return await withDiscordDeliveryRetry({
-          cfg,
-          accountId,
-          fn: async () =>
-            await sendVoice(target, mediaUrl, {
-              cfg,
-              replyTo: replyToId ?? undefined,
-              accountId: accountId ?? undefined,
-              silent: silent ?? undefined,
-            }),
-        });
+          resolveOutboundSendDep<DiscordVoiceSendFn>(deps, "discordVoice");
+        if (sendVoice) {
+          return await withDiscordDeliveryRetry({
+            cfg,
+            accountId,
+            fn: async () =>
+              await sendVoice(target, mediaUrl, {
+                cfg,
+                replyTo: replyToId ?? undefined,
+                accountId: accountId ?? undefined,
+                silent: silent ?? undefined,
+              }),
+          });
+        }
       }
       if (text.trim() && mediaUrl && isLikelyDiscordVideoMedia(mediaUrl)) {
         await withDiscordDeliveryRetry({
