From e2b16f23a24efd4bdeab48cc42329d5877d6c72f Mon Sep 17 00:00:00 2001
From: XZB-1248 <28593573+XZB-1248@users.noreply.github.com>
Date: Thu, 19 Feb 2026 22:36:04 +0800
Subject: [PATCH] fix(discord): apply 2000-char chunking when sending messages
 with attachments

---
 pkg/channels/discord.go | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/pkg/channels/discord.go b/pkg/channels/discord.go
index 34d33e6c2..bad137c2c 100644
--- a/pkg/channels/discord.go
+++ b/pkg/channels/discord.go
@@ -122,6 +122,14 @@ func (c *DiscordChannel) Send(ctx context.Context, msg bus.OutboundMessage) erro
 }
 
 func (c *DiscordChannel) sendWithAttachments(ctx context.Context, channelID, content string, attachments []bus.Attachment) error {
+	// Split content to respect Discord's 2000-char limit.
+	// The first chunk is sent together with the files; remaining chunks follow as plain text.
+	chunks := utils.SplitMessage(content, 2000)
+	firstChunk := ""
+	if len(chunks) > 0 {
+		firstChunk = chunks[0]
+	}
+
 	sendCtx, cancel := context.WithTimeout(ctx, sendTimeout)
 	defer cancel()
 
@@ -152,7 +160,7 @@ func (c *DiscordChannel) sendWithAttachments(ctx context.Context, channelID, con
 		}
 
 		messageData := &discordgo.MessageSend{
-			Content: content,
+			Content: firstChunk,
 			Files:   files,
 		}
 
@@ -165,10 +173,18 @@ func (c *DiscordChannel) sendWithAttachments(ctx context.Context, channelID, con
 		if err != nil {
 			return fmt.Errorf("failed to send discord message with attachments: %w", err)
 		}
-		return nil
 	case <-sendCtx.Done():
 		return fmt.Errorf("send message timeout: %w", sendCtx.Err())
 	}
+
+	// Send any remaining chunks as follow-up plain text messages
+	for _, chunk := range chunks[1:] {
+		if err := c.sendChunk(ctx, channelID, chunk); err != nil {
+			return err
+		}
+	}
+
+	return nil
 }
 
 func (c *DiscordChannel) sendChunk(ctx context.Context, channelID, content string) error {