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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

pkg/audio/sentence.go

@@ -7,7 +7,7 @@ import (
 
 // SplitSentences splits text into sentence-sized chunks suitable for TTS synthesis.
 // It splits on sentence-ending punctuation (.!?\n) while avoiding false splits
-// on abbreviations and decimal numbers. Very short fragments are merged with
+// on decimal numbers. Very short fragments are merged with
 // the next sentence to prevent choppy playback.
 func SplitSentences(text string) []string {
 	if text == "" {

pkg/channels/discord/discord.go

@@ -678,10 +678,18 @@ func (c *DiscordChannel) listenVoiceControl(ctx context.Context) {
 }
 
 func (c *DiscordChannel) playTTS(ctx context.Context, vc *discordgo.VoiceConnection, text string) {
-	// Clear cancelTTS when playback finishes (normal or interrupted)
+	// Capture the cancel func associated with this playback (if any).
+	c.ttsMu.Lock()
+	playbackCancel := c.cancelTTS
+	c.ttsMu.Unlock()
+
+	// Clear cancelTTS when playback finishes (normal or interrupted),
+	// but only if it still refers to this playback's cancel func.
 	defer func() {
 		c.ttsMu.Lock()
+		if c.cancelTTS == playbackCancel {
 			c.cancelTTS = nil
+		}
 		c.ttsMu.Unlock()
 	}()
 
@@ -700,13 +708,18 @@ func (c *DiscordChannel) playTTS(ctx context.Context, vc *discordgo.VoiceConnect
 
 	var prefetch chan ttResult
 
-	// Ensure any in-flight prefetch is drained on exit to prevent stream leaks
+	// Ensure any in-flight prefetch is drained on exit to prevent stream leaks,
+	// but avoid blocking indefinitely if the prefetch goroutine is stuck or never sends.
 	defer func() {
 		if prefetch != nil {
-			result := <-prefetch
+			select {
+			case result := <-prefetch:
 				if result.stream != nil {
 					result.stream.Close()
 				}
+			default:
+				// No prefetched result available to drain; avoid blocking on exit.
+			}
 		}
 	}()
 

pkg/channels/discord/voice.go

@@ -17,7 +17,12 @@ func (c *DiscordChannel) handleVoiceCommand(s *discordgo.Session, m *discordgo.M
 	if m.Content == "!vc join" {
 		vs, err := s.State.VoiceState(m.GuildID, m.Author.ID)
 		if err != nil || vs == nil {
-			s.ChannelMessageSend(m.ChannelID, "You need to be in a voice channel first!")
+			if _, sendErr := s.ChannelMessageSend(m.ChannelID, "You need to be in a voice channel first!"); sendErr != nil {
+				logger.InfoCF("discord", "Failed to send voice channel requirement message", map[string]any{
+					"channel": m.ChannelID,
+					"error":   sendErr,
+				})
+			}
 			return true
 		}
 
@@ -25,21 +30,45 @@ func (c *DiscordChannel) handleVoiceCommand(s *discordgo.Session, m *discordgo.M
 		vc, err := s.ChannelVoiceJoin(c.ctx, m.GuildID, vs.ChannelID, false, false)
 		vc, err := s.ChannelVoiceJoin(c.ctx, m.GuildID, vs.ChannelID, false, false)
 		if err != nil {
-			s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("Failed to join voice channel: %v", err))
+			if _, sendErr := s.ChannelMessageSend(m.ChannelID, fmt.Sprintf("Failed to join voice channel: %v", err)); sendErr != nil {
+				logger.InfoCF("discord", "Failed to send voice join error message", map[string]any{
+					"channel": m.ChannelID,
+					"error":   sendErr,
+				})
+			}
 			return true
 		}
 
 		go c.receiveVoice(vc, m.GuildID, m.ChannelID)
-		s.ChannelMessageSend(m.ChannelID, "Joined Voice Channel! Listening for audio...")
+		if _, sendErr := s.ChannelMessageSend(m.ChannelID, "Joined Voice Channel! Listening for audio..."); sendErr != nil {
+			logger.InfoCF("discord", "Failed to send voice join success message", map[string]any{
+				"channel": m.ChannelID,
+				"error":   sendErr,
+			})
+		}
 		return true
 	} else if m.Content == "!vc leave" {
 		vc, exists := s.VoiceConnections[m.GuildID]
 		if exists && vc != nil {
-			vc.Disconnect(c.ctx)
-			vc.Disconnect(c.ctx)
-			s.ChannelMessageSend(m.ChannelID, "Left Voice Channel.")
+			if err := vc.Disconnect(c.ctx); err != nil {
+				logger.InfoCF("discord", "Failed to disconnect from voice channel", map[string]any{
+					"guild": m.GuildID,
+					"error": err,
+				})
+			}
+			if _, sendErr := s.ChannelMessageSend(m.ChannelID, "Left Voice Channel."); sendErr != nil {
+				logger.InfoCF("discord", "Failed to send voice leave success message", map[string]any{
+					"channel": m.ChannelID,
+					"error":   sendErr,
+				})
+			}
 		} else {
-			s.ChannelMessageSend(m.ChannelID, "Not in a voice channel.")
+			if _, sendErr := s.ChannelMessageSend(m.ChannelID, "Not in a voice channel."); sendErr != nil {
+				logger.InfoCF("discord", "Failed to send voice not-in-channel message", map[string]any{
+					"channel": m.ChannelID,
+					"error":   sendErr,
+				})
+			}
 		}
 		return true
 	}

pkg/tts/tts.go

@@ -81,6 +81,8 @@ func NewOpenAITTSProvider(apiKey string, apiBase string, proxyURL string) *OpenA
 			client.Transport = &http.Transport{
 				Proxy: http.ProxyURL(pURL),
 			}
+		} else {
+			logger.Warnf("NewOpenAITTSProvider: invalid proxy URL %q: %v; proceeding without proxy", proxyURL, err)
 		}
 	}
 

pkg/voice/agent.go

@@ -244,10 +244,10 @@ func (a *Agent) processUtterance(ctx context.Context, acc *speechAccumulator) {
 		SenderID: acc.speakerID,
 		ChatID:   acc.chatID,
 		Content:  res.Text + oralPrompt,
-		Content:  res.Text + oralPrompt,
 		Peer:     bus.Peer{Kind: "channel", ID: acc.chatID},
 		Metadata: map[string]string{
 			"is_voice":    "true",
+			"oral_prompt": oralPrompt,
 		},
 	}); err != nil {
 		logger.ErrorCF("voice-agent", "Failed to publish inbound message", map[string]any{"error": err})