feat(discord): include channel name in dynamic context

pkg/agent/loop.go

@@ -55,6 +55,7 @@ type processOptions struct {
 	SessionKey      string   // Session identifier for history/context
 	Channel         string   // Target channel for tool execution
 	ChatID          string   // Target chat ID for tool execution
+	ChatName        string   // Optional human-readable chat name for prompt context
 	UserMessage     string   // User message content (may include prefix)
 	Media           []string // media:// refs from inbound message
 	DefaultResponse string   // Response when LLM returns empty
@@ -67,6 +68,7 @@ const (
 	defaultResponse           = "I've completed processing but have no response to give. Increase `max_tool_iterations` in config.json."
 	sessionKeyAgentPrefix     = "agent:"
 	metadataKeyAccountID      = "account_id"
+	metadataKeyChatName       = "chat_name"
 	metadataKeyGuildID        = "guild_id"
 	metadataKeyTeamID         = "team_id"
 	metadataKeyParentPeerKind = "parent_peer_kind"
@@ -619,6 +621,7 @@ func (al *AgentLoop) processMessage(ctx context.Context, msg bus.InboundMessage)
 		SessionKey:      sessionKey,
 		Channel:         msg.Channel,
 		ChatID:          msg.ChatID,
+		ChatName:        inboundMetadata(msg, metadataKeyChatName),
 		UserMessage:     msg.Content,
 		Media:           msg.Media,
 		DefaultResponse: defaultResponse,
@@ -761,7 +764,7 @@ func (al *AgentLoop) runAgentLoop(
 		opts.UserMessage,
 		opts.Media,
 		opts.Channel,
-		opts.ChatID,
+		displayChatID(opts.ChatID, opts.ChatName),
 	)
 
 	// Resolve media:// refs to base64 data URLs (streaming)
@@ -1818,6 +1821,13 @@ func inboundMetadata(msg bus.InboundMessage, key string) string {
 	return msg.Metadata[key]
 }
 
+func displayChatID(chatID, chatName string) string {
+	if chatID == "" || chatName == "" {
+		return chatID
+	}
+	return fmt.Sprintf("%s (%s)", chatID, chatName)
+}
+
 // extractParentPeer extracts the parent peer (reply-to) from inbound message metadata.
 func extractParentPeer(msg bus.InboundMessage) *routing.RoutePeer {
 	parentKind := inboundMetadata(msg, metadataKeyParentPeerKind)

pkg/agent/loop_test.go

@@ -889,6 +889,16 @@ func TestTargetReasoningChannelID_AllChannels(t *testing.T) {
 	}
 }
 
+func TestDisplayChatID_AppendsChatName(t *testing.T) {
+	if got := displayChatID("123456789012345678", "#general"); got != "123456789012345678 (#general)" {
+		t.Fatalf("displayChatID() = %q, want %q", got, "123456789012345678 (#general)")
+	}
+
+	if got := displayChatID("123456789012345678", ""); got != "123456789012345678" {
+		t.Fatalf("displayChatID() without chatName = %q, want %q", got, "123456789012345678")
+	}
+}
+
 func TestHandleReasoning(t *testing.T) {
 	newLoop := func(t *testing.T) (*AgentLoop, *bus.MessageBus) {
 		t.Helper()

pkg/channels/discord/discord.go

@@ -449,12 +449,31 @@ func (c *DiscordChannel) handleMessage(s *discordgo.Session, m *discordgo.Messag
 		"display_name": sender.DisplayName,
 		"guild_id":     m.GuildID,
 		"channel_id":   m.ChannelID,
+		"chat_name":    resolveDiscordChannelName(c.session, m.ChannelID),
 		"is_dm":        fmt.Sprintf("%t", m.GuildID == ""),
 	}
 
 	c.HandleMessage(c.ctx, peer, m.ID, senderID, m.ChannelID, content, mediaPaths, metadata, sender)
 }
 
+func resolveDiscordChannelName(session *discordgo.Session, channelID string) string {
+	if session == nil || channelID == "" {
+		return ""
+	}
+
+	if session.State != nil {
+		if channel, err := session.State.Channel(channelID); err == nil && channel != nil && channel.Name != "" {
+			return "#" + channel.Name
+		}
+	}
+
+	channel, err := session.Channel(channelID)
+	if err != nil || channel == nil || channel.Name == "" {
+		return ""
+	}
+	return "#" + channel.Name
+}
+
 // startTyping starts a continuous typing indicator loop for the given chatID.
 // It stops any existing typing loop for that chatID before starting a new one.
 func (c *DiscordChannel) startTyping(chatID string) {

pkg/channels/discord/discord_resolve_test.go

@@ -2,6 +2,8 @@ package discord
 
 import (
 	"testing"
+
+	"github.com/bwmarrin/discordgo"
 )
 
 func TestChannelRefRegex(t *testing.T) {
@@ -96,3 +98,24 @@ func TestMsgLinkRegex_MultipleMatches(t *testing.T) {
 		t.Errorf("3rd match = %v, want guild=7 chan=8 msg=9", matches[2])
 	}
 }
+
+func TestResolveDiscordChannelName_FromState(t *testing.T) {
+	session, err := discordgo.New("Bot test-token")
+	if err != nil {
+		t.Fatalf("discordgo.New() error = %v", err)
+	}
+
+	session.StateEnabled = true
+	session.State = discordgo.NewState()
+	session.State.GuildAdd(&discordgo.Guild{ID: "guild-1"})
+	session.State.ChannelAdd(&discordgo.Channel{
+		ID:   "123",
+		Name: "general",
+		Type: discordgo.ChannelTypeGuildText,
+		GuildID: "guild-1",
+	})
+
+	if got := resolveDiscordChannelName(session, "123"); got != "#general" {
+		t.Fatalf("resolveDiscordChannelName() = %q, want %q", got, "#general")
+	}
+}