diff --git a/pkg/channels/irc/irc.go b/pkg/channels/irc/irc.go
index 2f8458f3a..369968332 100644
--- a/pkg/channels/irc/irc.go
+++ b/pkg/channels/irc/irc.go
@@ -1,216 +1,216 @@
-package irc
-
-import (
-	"context"
-	"crypto/tls"
-	"fmt"
-	"strings"
-
-	"github.com/ergochat/irc-go/ircevent"
-	"github.com/ergochat/irc-go/ircmsg"
-
-	"github.com/sipeed/picoclaw/pkg/bus"
-	"github.com/sipeed/picoclaw/pkg/channels"
-	"github.com/sipeed/picoclaw/pkg/config"
-	"github.com/sipeed/picoclaw/pkg/logger"
-)
-
-// IRCChannel implements the Channel interface for IRC servers.
-type IRCChannel struct {
-	*channels.BaseChannel
-	config config.IRCConfig
-	conn   *ircevent.Connection
-	ctx    context.Context
-	cancel context.CancelFunc
-}
-
-// NewIRCChannel creates a new IRC channel.
-func NewIRCChannel(cfg config.IRCConfig, messageBus *bus.MessageBus) (*IRCChannel, error) {
-	if cfg.Server == "" {
-		return nil, fmt.Errorf("irc server is required")
-	}
-	if cfg.Nick == "" {
-		return nil, fmt.Errorf("irc nick is required")
-	}
-	cfg.Channels = normalizeIRCChannels(cfg.Channels)
-
-	base := channels.NewBaseChannel("irc", cfg, messageBus, cfg.AllowFrom,
-		channels.WithMaxMessageLength(400),
-		channels.WithGroupTrigger(cfg.GroupTrigger),
-		channels.WithReasoningChannelID(cfg.ReasoningChannelID),
-	)
-
-	return &IRCChannel{
-		BaseChannel: base,
-		config:      cfg,
-	}, nil
-}
-
-// Start connects to the IRC server and begins listening.
-func (c *IRCChannel) Start(ctx context.Context) error {
-	logger.InfoC("irc", "Starting IRC channel")
-	c.ctx, c.cancel = context.WithCancel(ctx)
-
-	user := c.config.User
-	if user == "" {
-		user = c.config.Nick
-	}
-	realName := c.config.RealName
-	if realName == "" {
-		realName = c.config.Nick
-	}
-	caps := []string(c.config.RequestCaps)
-	if len(caps) == 0 {
-		caps = []string{"server-time", "message-tags"}
-	}
-
-	conn := &ircevent.Connection{
-		Server:      c.config.Server,
-		Nick:        c.config.Nick,
-		User:        user,
-		RealName:    realName,
-		Password:    c.config.Password,
-		UseTLS:      c.config.TLS,
-		RequestCaps: caps,
-		QuitMessage: "Goodbye",
-		Debug:       false,
-		Log:         nil,
-	}
-
-	if c.config.TLS {
-		conn.TLSConfig = &tls.Config{
-			ServerName: extractHost(c.config.Server),
-		}
-	}
-
-	// SASL auth (takes priority over NickServ)
-	if c.config.SASLUser != "" && c.config.SASLPassword != "" {
-		conn.SASLLogin = c.config.SASLUser
-		conn.SASLPassword = c.config.SASLPassword
-	}
-
-	// Register event handlers
-	conn.AddConnectCallback(func(e ircmsg.Message) {
-		c.onConnect(conn)
-	})
-	conn.AddCallback("PRIVMSG", func(e ircmsg.Message) {
-		c.onPrivmsg(conn, e)
-	})
-
-	if err := conn.Connect(); err != nil {
-		return fmt.Errorf("irc connect failed: %w", err)
-	}
-
-	c.conn = conn
-
-	// ircevent.Connection.Loop() handles reconnection internally.
-	go conn.Loop()
-
-	c.SetRunning(true)
-	logger.InfoCF("irc", "IRC channel started", map[string]any{
-		"server": c.config.Server,
-		"nick":   c.config.Nick,
-	})
-	return nil
-}
-
-// Stop disconnects from the IRC server.
-func (c *IRCChannel) Stop(ctx context.Context) error {
-	logger.InfoC("irc", "Stopping IRC channel")
-	c.SetRunning(false)
-
-	if c.conn != nil {
-		c.conn.Quit()
-	}
-	if c.cancel != nil {
-		c.cancel()
-	}
-
-	logger.InfoC("irc", "IRC channel stopped")
-	return nil
-}
-
-// Send sends a message to an IRC channel or user.
-func (c *IRCChannel) Send(ctx context.Context, msg bus.OutboundMessage) error {
-	if !c.IsRunning() {
-		return channels.ErrNotRunning
-	}
-
-	target := msg.ChatID
-	if target == "" {
-		return fmt.Errorf("chat ID is empty: %w", channels.ErrSendFailed)
-	}
-
-	if strings.TrimSpace(msg.Content) == "" {
-		return nil
-	}
-
-	// Send each line separately (IRC is line-oriented)
-	lines := strings.Split(msg.Content, "\n")
-	for _, line := range lines {
-		line = strings.TrimRight(line, "\r")
-		if line == "" {
-			continue
-		}
-		c.conn.Privmsg(target, line)
-	}
-
-	logger.DebugCF("irc", "Message sent", map[string]any{
-		"target": target,
-		"lines":  len(lines),
-	})
-	return nil
-}
-
-// StartTyping implements channels.TypingCapable using IRCv3 +typing client tag.
-// Requires typing.enabled in config and server support for message-tags capability.
-func (c *IRCChannel) StartTyping(ctx context.Context, chatID string) (func(), error) {
-	noop := func() {}
-
-	if !c.config.Typing.Enabled || !c.IsRunning() || c.conn == nil {
-		return noop, nil
-	}
-
-	// Check if server supports message-tags (required for TAGMSG)
-	if _, ok := c.conn.AcknowledgedCaps()["message-tags"]; !ok {
-		return noop, nil
-	}
-
-	c.conn.SendWithTags(map[string]string{"+typing": "active"}, "TAGMSG", chatID)
-
-	return func() {
-		if c.IsRunning() && c.conn != nil {
-			c.conn.SendWithTags(map[string]string{"+typing": "done"}, "TAGMSG", chatID)
-		}
-	}, nil
-}
-
-// extractHost returns the hostname portion of a host:port string.
-func extractHost(server string) string {
-	host, _, found := strings.Cut(server, ":")
-	if found {
-		return host
-	}
-	return server
-}
-
-func normalizeIRCChannels(channels config.FlexibleStringSlice) config.FlexibleStringSlice {
-	if len(channels) == 0 {
-		return channels
-	}
-
-	normalized := make(config.FlexibleStringSlice, 0, len(channels))
-	for _, channel := range channels {
-		channel = strings.TrimSpace(channel)
-		if channel == "" {
-			continue
-		}
-		switch channel[0] {
-		case '#', '&', '+', '!':
-			normalized = append(normalized, channel)
-		default:
-			normalized = append(normalized, "#"+channel)
-		}
-	}
-	return normalized
-}
+package irc
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"strings"
+
+	"github.com/ergochat/irc-go/ircevent"
+	"github.com/ergochat/irc-go/ircmsg"
+
+	"github.com/sipeed/picoclaw/pkg/bus"
+	"github.com/sipeed/picoclaw/pkg/channels"
+	"github.com/sipeed/picoclaw/pkg/config"
+	"github.com/sipeed/picoclaw/pkg/logger"
+)
+
+// IRCChannel implements the Channel interface for IRC servers.
+type IRCChannel struct {
+	*channels.BaseChannel
+	config config.IRCConfig
+	conn   *ircevent.Connection
+	ctx    context.Context
+	cancel context.CancelFunc
+}
+
+// NewIRCChannel creates a new IRC channel.
+func NewIRCChannel(cfg config.IRCConfig, messageBus *bus.MessageBus) (*IRCChannel, error) {
+	if cfg.Server == "" {
+		return nil, fmt.Errorf("irc server is required")
+	}
+	if cfg.Nick == "" {
+		return nil, fmt.Errorf("irc nick is required")
+	}
+	cfg.Channels = normalizeIRCChannels(cfg.Channels)
+
+	base := channels.NewBaseChannel("irc", cfg, messageBus, cfg.AllowFrom,
+		channels.WithMaxMessageLength(400),
+		channels.WithGroupTrigger(cfg.GroupTrigger),
+		channels.WithReasoningChannelID(cfg.ReasoningChannelID),
+	)
+
+	return &IRCChannel{
+		BaseChannel: base,
+		config:      cfg,
+	}, nil
+}
+
+// Start connects to the IRC server and begins listening.
+func (c *IRCChannel) Start(ctx context.Context) error {
+	logger.InfoC("irc", "Starting IRC channel")
+	c.ctx, c.cancel = context.WithCancel(ctx)
+
+	user := c.config.User
+	if user == "" {
+		user = c.config.Nick
+	}
+	realName := c.config.RealName
+	if realName == "" {
+		realName = c.config.Nick
+	}
+	caps := []string(c.config.RequestCaps)
+	if len(caps) == 0 {
+		caps = []string{"server-time", "message-tags"}
+	}
+
+	conn := &ircevent.Connection{
+		Server:      c.config.Server,
+		Nick:        c.config.Nick,
+		User:        user,
+		RealName:    realName,
+		Password:    c.config.Password,
+		UseTLS:      c.config.TLS,
+		RequestCaps: caps,
+		QuitMessage: "Goodbye",
+		Debug:       false,
+		Log:         nil,
+	}
+
+	if c.config.TLS {
+		conn.TLSConfig = &tls.Config{
+			ServerName: extractHost(c.config.Server),
+		}
+	}
+
+	// SASL auth (takes priority over NickServ)
+	if c.config.SASLUser != "" && c.config.SASLPassword != "" {
+		conn.SASLLogin = c.config.SASLUser
+		conn.SASLPassword = c.config.SASLPassword
+	}
+
+	// Register event handlers
+	conn.AddConnectCallback(func(e ircmsg.Message) {
+		c.onConnect(conn)
+	})
+	conn.AddCallback("PRIVMSG", func(e ircmsg.Message) {
+		c.onPrivmsg(conn, e)
+	})
+
+	if err := conn.Connect(); err != nil {
+		return fmt.Errorf("irc connect failed: %w", err)
+	}
+
+	c.conn = conn
+
+	// ircevent.Connection.Loop() handles reconnection internally.
+	go conn.Loop()
+
+	c.SetRunning(true)
+	logger.InfoCF("irc", "IRC channel started", map[string]any{
+		"server": c.config.Server,
+		"nick":   c.config.Nick,
+	})
+	return nil
+}
+
+// Stop disconnects from the IRC server.
+func (c *IRCChannel) Stop(ctx context.Context) error {
+	logger.InfoC("irc", "Stopping IRC channel")
+	c.SetRunning(false)
+
+	if c.conn != nil {
+		c.conn.Quit()
+	}
+	if c.cancel != nil {
+		c.cancel()
+	}
+
+	logger.InfoC("irc", "IRC channel stopped")
+	return nil
+}
+
+// Send sends a message to an IRC channel or user.
+func (c *IRCChannel) Send(ctx context.Context, msg bus.OutboundMessage) error {
+	if !c.IsRunning() {
+		return channels.ErrNotRunning
+	}
+
+	target := msg.ChatID
+	if target == "" {
+		return fmt.Errorf("chat ID is empty: %w", channels.ErrSendFailed)
+	}
+
+	if strings.TrimSpace(msg.Content) == "" {
+		return nil
+	}
+
+	// Send each line separately (IRC is line-oriented)
+	lines := strings.Split(msg.Content, "\n")
+	for _, line := range lines {
+		line = strings.TrimRight(line, "\r")
+		if line == "" {
+			continue
+		}
+		c.conn.Privmsg(target, line)
+	}
+
+	logger.DebugCF("irc", "Message sent", map[string]any{
+		"target": target,
+		"lines":  len(lines),
+	})
+	return nil
+}
+
+// StartTyping implements channels.TypingCapable using IRCv3 +typing client tag.
+// Requires typing.enabled in config and server support for message-tags capability.
+func (c *IRCChannel) StartTyping(ctx context.Context, chatID string) (func(), error) {
+	noop := func() {}
+
+	if !c.config.Typing.Enabled || !c.IsRunning() || c.conn == nil {
+		return noop, nil
+	}
+
+	// Check if server supports message-tags (required for TAGMSG)
+	if _, ok := c.conn.AcknowledgedCaps()["message-tags"]; !ok {
+		return noop, nil
+	}
+
+	c.conn.SendWithTags(map[string]string{"+typing": "active"}, "TAGMSG", chatID)
+
+	return func() {
+		if c.IsRunning() && c.conn != nil {
+			c.conn.SendWithTags(map[string]string{"+typing": "done"}, "TAGMSG", chatID)
+		}
+	}, nil
+}
+
+// extractHost returns the hostname portion of a host:port string.
+func extractHost(server string) string {
+	host, _, found := strings.Cut(server, ":")
+	if found {
+		return host
+	}
+	return server
+}
+
+func normalizeIRCChannels(channels config.FlexibleStringSlice) config.FlexibleStringSlice {
+	if len(channels) == 0 {
+		return channels
+	}
+
+	normalized := make(config.FlexibleStringSlice, 0, len(channels))
+	for _, channel := range channels {
+		channel = strings.TrimSpace(channel)
+		if channel == "" {
+			continue
+		}
+		switch channel[0] {
+		case '#', '&', '+', '!':
+			normalized = append(normalized, channel)
+		default:
+			normalized = append(normalized, "#"+channel)
+		}
+	}
+	return normalized
+}