feat(telegram): add /models shortcut for model list and switch

pkg/channels/telegram/command_registration.go

@@ -31,16 +31,7 @@ func commandRegistrationDelay(attempt int) time.Duration {
 
 // RegisterCommands registers bot commands on Telegram platform.
 func (c *TelegramChannel) RegisterCommands(ctx context.Context, defs []commands.Definition) error {
-	botCommands := make([]telego.BotCommand, 0, len(defs))
-	for _, def := range defs {
-		if def.Name == "" || def.Description == "" {
-			continue
-		}
-		botCommands = append(botCommands, telego.BotCommand{
-			Command:     def.Name,
-			Description: def.Description,
-		})
-	}
+	botCommands := buildTelegramBotCommands(defs)
 
 	current, err := c.bot.GetMyCommands(ctx, &telego.GetMyCommandsParams{})
 	if err != nil {
@@ -57,6 +48,34 @@ func (c *TelegramChannel) RegisterCommands(ctx context.Context, defs []commands.
 	})
 }
 
+func buildTelegramBotCommands(defs []commands.Definition) []telego.BotCommand {
+	const modelsCommand = "models"
+	const modelsDescription = "List models or switch: /models <name>"
+
+	botCommands := make([]telego.BotCommand, 0, len(defs)+1)
+	hasModelsShortcut := false
+	for _, def := range defs {
+		if def.Name == "" || def.Description == "" {
+			continue
+		}
+		if def.Name == modelsCommand {
+			hasModelsShortcut = true
+		}
+		botCommands = append(botCommands, telego.BotCommand{
+			Command:     def.Name,
+			Description: def.Description,
+		})
+	}
+	if !hasModelsShortcut {
+		botCommands = append(botCommands, telego.BotCommand{
+			Command:     modelsCommand,
+			Description: modelsDescription,
+		})
+	}
+
+	return botCommands
+}
+
 func (c *TelegramChannel) startCommandRegistration(ctx context.Context, defs []commands.Definition) {
 	if len(defs) == 0 {
 		return

pkg/channels/telegram/command_registration_test.go

@@ -3,10 +3,13 @@ package telegram
 import (
 	"context"
 	"errors"
+	"slices"
 	"sync/atomic"
 	"testing"
 	"time"
 
+	"github.com/mymmrac/telego"
+
 	"github.com/sipeed/picoclaw/pkg/commands"
 )
 
@@ -94,3 +97,37 @@ func TestStartCommandRegistration_StopsAfterCancel(t *testing.T) {
 		t.Fatalf("expected retries to quiesce after cancel, got %d -> %d", stable, attempts.Load())
 	}
 }
+
+func TestBuildTelegramBotCommands_AddsModelsShortcutWhenMissing(t *testing.T) {
+	defs := []commands.Definition{
+		{Name: "help", Description: "Help"},
+		{Name: "list", Description: "List"},
+	}
+
+	got := buildTelegramBotCommands(defs)
+
+	models := telego.BotCommand{
+		Command:     "models",
+		Description: "List models or switch: /models <name>",
+	}
+	if !slices.Contains(got, models) {
+		t.Fatalf("expected models shortcut in bot commands, got: %#v", got)
+	}
+}
+
+func TestBuildTelegramBotCommands_DoesNotDuplicateExistingModelsCommand(t *testing.T) {
+	defs := []commands.Definition{
+		{Name: "models", Description: "Configured models"},
+	}
+
+	got := buildTelegramBotCommands(defs)
+	count := 0
+	for _, cmd := range got {
+		if cmd.Command == "models" {
+			count++
+		}
+	}
+	if count != 1 {
+		t.Fatalf("expected 1 models command, got %d (%#v)", count, got)
+	}
+}

pkg/channels/telegram/model_shortcut.go

@@ -0,0 +1,31 @@
+package telegram
+
+import "strings"
+
+// rewriteModelShortcut normalizes Telegram-specific /models shortcuts into
+// existing cross-channel commands handled by the command runtime.
+func rewriteModelShortcut(input, botUsername string) string {
+	parts := strings.Fields(strings.TrimSpace(input))
+	if len(parts) == 0 {
+		return input
+	}
+
+	token := parts[0]
+	if !strings.HasPrefix(token, "/") {
+		return input
+	}
+
+	name, target, hasTarget := strings.Cut(strings.TrimPrefix(token, "/"), "@")
+	if !strings.EqualFold(name, "models") {
+		return input
+	}
+	if hasTarget && (botUsername == "" || !strings.EqualFold(target, botUsername)) {
+		return input
+	}
+
+	if len(parts) == 1 {
+		return "/list models"
+	}
+
+	return "/switch model to " + strings.Join(parts[1:], " ")
+}

pkg/channels/telegram/telegram.go

@@ -583,7 +583,11 @@ func (c *TelegramChannel) handleMessage(ctx context.Context, message *telego.Mes
 	}
 
 	if message.Text != "" {
-		content += message.Text
+		botUsername := ""
+		if c.bot != nil {
+			botUsername = c.bot.Username()
+		}
+		content += rewriteModelShortcut(message.Text, botUsername)
 	}
 
 	if message.Caption != "" {

pkg/channels/telegram/telegram_dispatch_test.go

@@ -46,3 +46,85 @@ func TestHandleMessage_DoesNotConsumeGenericCommandsLocally(t *testing.T) {
 		t.Fatalf("content=%q", inbound.Content)
 	}
 }
+
+func TestHandleMessage_RewritesModelsShortcutToListModels(t *testing.T) {
+	messageBus := bus.NewMessageBus()
+	ch := &TelegramChannel{
+		BaseChannel: channels.NewBaseChannel("telegram", nil, messageBus, nil),
+		chatIDs:     make(map[string]int64),
+		ctx:         context.Background(),
+	}
+
+	msg := &telego.Message{
+		Text:      "/models",
+		MessageID: 10,
+		Chat: telego.Chat{
+			ID:   123,
+			Type: "private",
+		},
+		From: &telego.User{
+			ID:        42,
+			FirstName: "Alice",
+		},
+	}
+
+	if err := ch.handleMessage(context.Background(), msg); err != nil {
+		t.Fatalf("handleMessage error: %v", err)
+	}
+
+	inbound, ok := <-messageBus.InboundChan()
+	if !ok {
+		t.Fatal("expected inbound message to be forwarded")
+	}
+	if inbound.Content != "/list models" {
+		t.Fatalf("content=%q", inbound.Content)
+	}
+}
+
+func TestHandleMessage_RewritesModelsShortcutWithArgumentToSwitchModel(t *testing.T) {
+	messageBus := bus.NewMessageBus()
+	ch := &TelegramChannel{
+		BaseChannel: channels.NewBaseChannel("telegram", nil, messageBus, nil),
+		chatIDs:     make(map[string]int64),
+		ctx:         context.Background(),
+	}
+
+	msg := &telego.Message{
+		Text:      "/models qwen-max",
+		MessageID: 11,
+		Chat: telego.Chat{
+			ID:   123,
+			Type: "private",
+		},
+		From: &telego.User{
+			ID:        42,
+			FirstName: "Alice",
+		},
+	}
+
+	if err := ch.handleMessage(context.Background(), msg); err != nil {
+		t.Fatalf("handleMessage error: %v", err)
+	}
+
+	inbound, ok := <-messageBus.InboundChan()
+	if !ok {
+		t.Fatal("expected inbound message to be forwarded")
+	}
+	if inbound.Content != "/switch model to qwen-max" {
+		t.Fatalf("content=%q", inbound.Content)
+	}
+}
+
+func TestRewriteModelShortcut_WithBotUsernameTarget(t *testing.T) {
+	got := rewriteModelShortcut("/models@testbot qwen-max", "testbot")
+	if got != "/switch model to qwen-max" {
+		t.Fatalf("rewrite=%q, want %q", got, "/switch model to qwen-max")
+	}
+}
+
+func TestRewriteModelShortcut_DoesNotRewriteOtherBotTarget(t *testing.T) {
+	got := rewriteModelShortcut("/models@otherbot qwen-max", "testbot")
+	if got != "/models@otherbot qwen-max" {
+		t.Fatalf("rewrite=%q, want unchanged", got)
+	}
+}