fix(commands): unify command execution and harden parsing

pkg/channels/interfaces.go

@@ -48,3 +48,10 @@ type PlaceholderRecorder interface {
 type CommandRegistrarCapable interface {
 	RegisterCommands(ctx context.Context, defs []commands.Definition) error
 }
+
+// CommandParserCapable is implemented by channels that expose a command
+// dispatch entrypoint backed by shared command definitions/dispatcher.
+// It is optional and intended for cross-channel command handling features.
+type CommandParserCapable interface {
+	DispatchCommand(ctx context.Context, req commands.Request) commands.Result
+}

pkg/channels/interfaces_command_test.go

@@ -11,6 +11,16 @@ type mockRegistrar struct{}
 
 func (mockRegistrar) RegisterCommands(context.Context, []commands.Definition) error { return nil }
 
+type mockParser struct{}
+
+func (mockParser) DispatchCommand(context.Context, commands.Request) commands.Result {
+	return commands.Result{Matched: false}
+}
+
 func TestCommandRegistrarCapable_Compiles(t *testing.T) {
 	var _ CommandRegistrarCapable = mockRegistrar{}
 }
+
+func TestCommandParserCapable_Compiles(t *testing.T) {
+	var _ CommandParserCapable = mockParser{}
+}

pkg/channels/telegram/command_registration_test.go

@@ -3,6 +3,7 @@ package telegram
 import (
 	"context"
 	"errors"
+	"sync/atomic"
 	"testing"
 	"time"
 
@@ -28,3 +29,68 @@ func TestStartCommandRegistration_DoesNotBlock(t *testing.T) {
 		t.Fatal("registration did not start asynchronously")
 	}
 }
+
+func TestStartCommandRegistration_RetriesUntilSuccessThenStops(t *testing.T) {
+	ch := &TelegramChannel{}
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	origBackoff := commandRegistrationBackoff
+	commandRegistrationBackoff = []time.Duration{5 * time.Millisecond}
+	defer func() { commandRegistrationBackoff = origBackoff }()
+
+	var attempts atomic.Int32
+	ch.registerFunc = func(context.Context, []commands.Definition) error {
+		n := attempts.Add(1)
+		if n < 3 {
+			return errors.New("temporary failure")
+		}
+		return nil
+	}
+
+	ch.startCommandRegistration(ctx, []commands.Definition{{Name: "help", Description: "Help"}})
+
+	deadline := time.Now().Add(250 * time.Millisecond)
+	for time.Now().Before(deadline) {
+		if attempts.Load() >= 3 {
+			break
+		}
+		time.Sleep(5 * time.Millisecond)
+	}
+	if attempts.Load() < 3 {
+		t.Fatalf("expected at least 3 attempts, got %d", attempts.Load())
+	}
+
+	stable := attempts.Load()
+	time.Sleep(30 * time.Millisecond)
+	if attempts.Load() != stable {
+		t.Fatalf("expected retries to stop after success, got %d -> %d", stable, attempts.Load())
+	}
+}
+
+func TestStartCommandRegistration_StopsAfterCancel(t *testing.T) {
+	ch := &TelegramChannel{}
+	ctx, cancel := context.WithCancel(context.Background())
+
+	origBackoff := commandRegistrationBackoff
+	commandRegistrationBackoff = []time.Duration{5 * time.Millisecond}
+	defer func() { commandRegistrationBackoff = origBackoff }()
+	defer cancel()
+
+	var attempts atomic.Int32
+	ch.registerFunc = func(context.Context, []commands.Definition) error {
+		attempts.Add(1)
+		return errors.New("always fail")
+	}
+
+	ch.startCommandRegistration(ctx, []commands.Definition{{Name: "help", Description: "Help"}})
+
+	time.Sleep(20 * time.Millisecond)
+	cancel()
+	time.Sleep(20 * time.Millisecond) // allow in-flight attempt to settle
+	stable := attempts.Load()
+	time.Sleep(30 * time.Millisecond)
+	if attempts.Load() != stable {
+		t.Fatalf("expected retries to quiesce after cancel, got %d -> %d", stable, attempts.Load())
+	}
+}

pkg/channels/telegram/telegram_commands.go

@@ -40,7 +40,7 @@ func commandArgs(text string) string {
 
 func (c *cmd) Help(ctx context.Context, message telego.Message) error {
 	defs := commands.NewRegistry(commands.BuiltinDefinitions(c.config)).ForChannel("telegram")
-	msg := formatHelpMessage(defs)
+	msg := commands.FormatHelpMessage(defs)
 	_, err := c.bot.SendMessage(ctx, &telego.SendMessageParams{
 		ChatID: telego.ChatID{ID: message.Chat.ID},
 		Text:   msg,
@@ -51,26 +51,6 @@ func (c *cmd) Help(ctx context.Context, message telego.Message) error {
 	return err
 }
 
-func formatHelpMessage(defs []commands.Definition) string {
-	if len(defs) == 0 {
-		return "No commands available."
-	}
-
-	lines := make([]string, 0, len(defs))
-	for _, def := range defs {
-		usage := def.Usage
-		if usage == "" {
-			usage = "/" + def.Name
-		}
-		desc := def.Description
-		if desc == "" {
-			desc = "No description"
-		}
-		lines = append(lines, fmt.Sprintf("%s - %s", usage, desc))
-	}
-	return strings.Join(lines, "\n")
-}
-
 func (c *cmd) Start(ctx context.Context, message telego.Message) error {
 	_, err := c.bot.SendMessage(ctx, &telego.SendMessageParams{
 		ChatID: telego.ChatID{ID: message.Chat.ID},

pkg/channels/telegram/telegram_dispatch.go

@@ -10,57 +10,46 @@ import (
 	"github.com/sipeed/picoclaw/pkg/logger"
 )
 
-func (c *TelegramChannel) dispatchCommand(ctx context.Context, message telego.Message) bool {
+func (c *TelegramChannel) DispatchCommand(ctx context.Context, req commands.Request) commands.Result {
 	if c.dispatcher == nil {
-		return false
+		return commands.Result{Matched: false}
+	}
+	return c.dispatcher.Dispatch(ctx, req)
 }
 
+func (c *TelegramChannel) dispatchCommand(ctx context.Context, message telego.Message) bool {
 	senderID := ""
 	if message.From != nil {
 		senderID = strconv.FormatInt(message.From.ID, 10)
 	}
 
-	res := c.dispatcher.Dispatch(ctx, commands.Request{
+	res := c.DispatchCommand(ctx, commands.Request{
 		Channel:   "telegram",
 		ChatID:    strconv.FormatInt(message.Chat.ID, 10),
 		SenderID:  senderID,
 		Text:      message.Text,
 		MessageID: strconv.Itoa(message.MessageID),
+		Reply: func(text string) error {
+			_, err := c.bot.SendMessage(ctx, &telego.SendMessageParams{
+				ChatID: telego.ChatID{ID: message.Chat.ID},
+				Text:   text,
+				ReplyParameters: &telego.ReplyParameters{
+					MessageID: message.MessageID,
+				},
+			})
+			return err
+		},
 	})
 	if !res.Matched {
 		return false
 	}
 
-	switch res.Command {
+	if res.Err != nil {
-	case "help":
-		if err := c.commands.Help(ctx, message); err != nil {
 		logger.ErrorCF("telegram", "Command execution failed", map[string]any{
-				"command": "help",
+			"command": res.Command,
-				"error":   err.Error(),
+			"error":   res.Err.Error(),
 		})
 	}
-	case "start":
-		if err := c.commands.Start(ctx, message); err != nil {
-			logger.ErrorCF("telegram", "Command execution failed", map[string]any{
-				"command": "start",
-				"error":   err.Error(),
-			})
-		}
-	case "show":
-		if err := c.commands.Show(ctx, message); err != nil {
-			logger.ErrorCF("telegram", "Command execution failed", map[string]any{
-				"command": "show",
-				"error":   err.Error(),
-			})
-		}
-	case "list":
-		if err := c.commands.List(ctx, message); err != nil {
-			logger.ErrorCF("telegram", "Command execution failed", map[string]any{
-				"command": "list",
-				"error":   err.Error(),
-			})
-		}
-	}
 
 	return true
 }

pkg/channels/whatsapp/whatsapp.go

@@ -262,16 +262,15 @@ func (c *WhatsAppChannel) tryHandleCommand(
 	ctx context.Context,
 	text, chatID, senderID, messageID string,
 ) bool {
-	if c.dispatcher == nil {
+	res := c.DispatchCommand(ctx, commands.Request{
-		return false
-	}
-
-	res := c.dispatcher.Dispatch(ctx, commands.Request{
 		Channel:   "whatsapp",
 		ChatID:    chatID,
 		SenderID:  senderID,
 		Text:      text,
 		MessageID: messageID,
+		Reply: func(text string) error {
+			return c.Send(ctx, bus.OutboundMessage{ChatID: chatID, Content: text})
+		},
 	})
 	if res.Err != nil {
 		logger.WarnCF("whatsapp", "Command execution failed", map[string]any{
@@ -279,6 +278,12 @@ func (c *WhatsAppChannel) tryHandleCommand(
 			"error":   res.Err.Error(),
 		})
 	}
-
+	return res.Matched
-	return res.Handled
+}
+
+func (c *WhatsAppChannel) DispatchCommand(ctx context.Context, req commands.Request) commands.Result {
+	if c.dispatcher == nil {
+		return commands.Result{Matched: false}
+	}
+	return c.dispatcher.Dispatch(ctx, req)
 }

pkg/channels/whatsapp/whatsapp_command_test.go

@@ -20,3 +20,15 @@ func TestTryHandleCommand_UsesDispatcher(t *testing.T) {
 		t.Fatalf("handled=%v called=%v", handled, called)
 	}
 }
+
+func TestTryHandleCommand_MatchedWithoutHandler_DoesNotFallThrough(t *testing.T) {
+	ch := &WhatsAppChannel{}
+	ch.dispatcher = commands.DispatchFunc(func(context.Context, commands.Request) commands.Result {
+		return commands.Result{Matched: true, Handled: false, Command: "unknown"}
+	})
+
+	handled := ch.tryHandleCommand(context.Background(), "/unknown", "chat1", "user1", "mid1")
+	if !handled {
+		t.Fatal("expected matched command to be treated as handled")
+	}
+}

pkg/channels/whatsapp_native/whatsapp_command_test.go

@@ -22,3 +22,15 @@ func TestTryHandleCommand_UsesDispatcher(t *testing.T) {
 		t.Fatalf("handled=%v called=%v", handled, called)
 	}
 }
+
+func TestTryHandleCommand_MatchedWithoutHandler_DoesNotFallThrough(t *testing.T) {
+	ch := &WhatsAppNativeChannel{}
+	ch.dispatcher = commands.DispatchFunc(func(context.Context, commands.Request) commands.Result {
+		return commands.Result{Matched: true, Handled: false, Command: "unknown"}
+	})
+
+	handled := ch.tryHandleCommand(context.Background(), "/unknown", "chat1", "user1", "mid1")
+	if !handled {
+		t.Fatal("expected matched command to be treated as handled")
+	}
+}

pkg/channels/whatsapp_native/whatsapp_native.go

@@ -406,15 +406,15 @@ func (c *WhatsAppNativeChannel) tryHandleCommand(
 	ctx context.Context,
 	text, chatID, senderID, messageID string,
 ) bool {
-	if c.dispatcher == nil {
+	res := c.DispatchCommand(ctx, commands.Request{
-		return false
-	}
-	res := c.dispatcher.Dispatch(ctx, commands.Request{
 		Channel:   "whatsapp_native",
 		ChatID:    chatID,
 		SenderID:  senderID,
 		Text:      text,
 		MessageID: messageID,
+		Reply: func(text string) error {
+			return c.Send(ctx, bus.OutboundMessage{ChatID: chatID, Content: text})
+		},
 	})
 	if res.Err != nil {
 		logger.WarnCF("whatsapp", "Command execution failed", map[string]any{
@@ -422,7 +422,14 @@ func (c *WhatsAppNativeChannel) tryHandleCommand(
 			"error":   res.Err.Error(),
 		})
 	}
-	return res.Handled
+	return res.Matched
+}
+
+func (c *WhatsAppNativeChannel) DispatchCommand(ctx context.Context, req commands.Request) commands.Result {
+	if c.dispatcher == nil {
+		return commands.Result{Matched: false}
+	}
+	return c.dispatcher.Dispatch(ctx, req)
 }
 
 func (c *WhatsAppNativeChannel) Send(ctx context.Context, msg bus.OutboundMessage) error {

pkg/commands/builtin.go

@@ -1,32 +1,167 @@
 package commands
 
-import "github.com/sipeed/picoclaw/pkg/config"
+import (
+	"context"
+	"fmt"
+	"strings"
 
-func BuiltinDefinitions(_ *config.Config) []Definition {
+	"github.com/sipeed/picoclaw/pkg/config"
+)
+
+func BuiltinDefinitions(cfg *config.Config) []Definition {
 	return []Definition{
 		{
 			Name:        "start",
 			Description: "Start the bot",
 			Usage:       "/start",
 			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+			Handler:     replyText("Hello! I am PicoClaw 🦞"),
 		},
 		{
 			Name:        "help",
 			Description: "Show this help message",
 			Usage:       "/help",
 			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+			Handler: func(_ context.Context, req Request) error {
+				if req.Reply == nil {
+					return nil
+				}
+				defs := NewRegistry(BuiltinDefinitions(cfg)).ForChannel(req.Channel)
+				return req.Reply(FormatHelpMessage(defs))
+			},
 		},
 		{
 			Name:        "show",
 			Description: "Show current configuration",
 			Usage:       "/show [model|channel]",
-			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+			Channels:    []string{"telegram"},
+			Handler: func(_ context.Context, req Request) error {
+				if req.Reply == nil {
+					return nil
+				}
+				if cfg == nil {
+					return req.Reply("Command unavailable in current context.")
+				}
+				args := commandArgs(req.Text)
+				if args == "" {
+					return req.Reply("Usage: /show [model|channel]")
+				}
+
+				switch args {
+				case "model":
+					return req.Reply(fmt.Sprintf(
+						"Current Model: %s (Provider: %s)",
+						cfg.Agents.Defaults.GetModelName(),
+						cfg.Agents.Defaults.Provider,
+					))
+				case "channel":
+					return req.Reply(fmt.Sprintf("Current Channel: %s", req.Channel))
+				default:
+					return req.Reply(fmt.Sprintf("Unknown parameter: %s. Try 'model' or 'channel'.", args))
+				}
+			},
 		},
 		{
 			Name:        "list",
 			Description: "List available options",
 			Usage:       "/list [models|channels]",
-			Channels:    []string{"telegram", "whatsapp", "whatsapp_native"},
+			Channels:    []string{"telegram"},
+			Handler: func(_ context.Context, req Request) error {
+				if req.Reply == nil {
+					return nil
+				}
+				if cfg == nil {
+					return req.Reply("Command unavailable in current context.")
+				}
+				args := commandArgs(req.Text)
+				if args == "" {
+					return req.Reply("Usage: /list [models|channels]")
+				}
+
+				switch args {
+				case "models":
+					provider := cfg.Agents.Defaults.Provider
+					if provider == "" {
+						provider = "configured default"
+					}
+					return req.Reply(fmt.Sprintf(
+						"Configured Model: %s\nProvider: %s\n\nTo change models, update config.json",
+						cfg.Agents.Defaults.GetModelName(),
+						provider,
+					))
+				case "channels":
+					enabled := enabledChannels(cfg)
+					return req.Reply(fmt.Sprintf("Enabled Channels:\n- %s", strings.Join(enabled, "\n- ")))
+				default:
+					return req.Reply(fmt.Sprintf("Unknown parameter: %s. Try 'models' or 'channels'.", args))
+				}
+			},
 		},
 	}
 }
+
+func FormatHelpMessage(defs []Definition) string {
+	if len(defs) == 0 {
+		return "No commands available."
+	}
+
+	lines := make([]string, 0, len(defs))
+	for _, def := range defs {
+		usage := def.Usage
+		if usage == "" {
+			usage = "/" + def.Name
+		}
+		desc := def.Description
+		if desc == "" {
+			desc = "No description"
+		}
+		lines = append(lines, fmt.Sprintf("%s - %s", usage, desc))
+	}
+	return strings.Join(lines, "\n")
+}
+
+func commandArgs(text string) string {
+	parts := strings.SplitN(text, " ", 2)
+	if len(parts) < 2 {
+		return ""
+	}
+	return strings.TrimSpace(parts[1])
+}
+
+func replyText(text string) Handler {
+	return func(_ context.Context, req Request) error {
+		if req.Reply == nil {
+			return nil
+		}
+		return req.Reply(text)
+	}
+}
+
+func enabledChannels(cfg *config.Config) []string {
+	enabled := make([]string, 0, 8)
+	if cfg.Channels.Telegram.Enabled {
+		enabled = append(enabled, "telegram")
+	}
+	if cfg.Channels.WhatsApp.Enabled {
+		enabled = append(enabled, "whatsapp")
+	}
+	if cfg.Channels.Feishu.Enabled {
+		enabled = append(enabled, "feishu")
+	}
+	if cfg.Channels.Discord.Enabled {
+		enabled = append(enabled, "discord")
+	}
+	if cfg.Channels.Slack.Enabled {
+		enabled = append(enabled, "slack")
+	}
+	if cfg.Channels.DingTalk.Enabled {
+		enabled = append(enabled, "dingtalk")
+	}
+	if cfg.Channels.LINE.Enabled {
+		enabled = append(enabled, "line")
+	}
+	if cfg.Channels.OneBot.Enabled {
+		enabled = append(enabled, "onebot")
+	}
+	return enabled
+}

pkg/commands/builtin_test.go

@@ -14,3 +14,17 @@ func TestBuiltinDefinitions_ContainsTelegramDefaults(t *testing.T) {
 		}
 	}
 }
+
+func TestBuiltinDefinitions_WhatsAppOnlyHasBasicCommands(t *testing.T) {
+	defs := NewRegistry(BuiltinDefinitions(nil)).ForChannel("whatsapp")
+	names := map[string]bool{}
+	for _, d := range defs {
+		names[d.Name] = true
+	}
+	if !names["start"] || !names["help"] {
+		t.Fatalf("whatsapp should include start/help, got %+v", names)
+	}
+	if names["show"] || names["list"] {
+		t.Fatalf("whatsapp should not include show/list, got %+v", names)
+	}
+}

pkg/commands/dispatcher.go

@@ -13,6 +13,7 @@ type Request struct {
 	SenderID  string
 	Text      string
 	MessageID string
+	Reply     func(text string) error
 }
 
 type Result struct {
@@ -41,14 +42,13 @@ func NewDispatcher(reg *Registry) *Dispatcher {
 }
 
 func (d *Dispatcher) Dispatch(ctx context.Context, req Request) Result {
-	token := firstToken(req.Text)
+	cmdName, ok := parseCommandName(req.Text)
-	if token == "" {
+	if !ok {
 		return Result{Matched: false}
 	}
 
-	cmdName := strings.TrimPrefix(token, "/")
 	for _, def := range d.reg.ForChannel(req.Channel) {
-		if def.Name != cmdName {
+		if def.Name != cmdName && !contains(def.Aliases, cmdName) {
 			continue
 		}
 		if def.Handler == nil {
@@ -68,3 +68,29 @@ func firstToken(input string) string {
 	}
 	return parts[0]
 }
+
+func parseCommandName(input string) (string, bool) {
+	token := firstToken(input)
+	if token == "" || !strings.HasPrefix(token, "/") {
+		return "", false
+	}
+
+	name := strings.TrimPrefix(token, "/")
+	if i := strings.Index(name, "@"); i >= 0 {
+		name = name[:i]
+	}
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return "", false
+	}
+	return name, true
+}
+
+func contains(items []string, target string) bool {
+	for _, item := range items {
+		if item == target {
+			return true
+		}
+	}
+	return false
+}

pkg/commands/dispatcher_test.go

@@ -26,3 +26,36 @@ func TestDispatcher_MatchSlashCommand(t *testing.T) {
 		t.Fatalf("dispatch result = %+v, called=%v", res, called)
 	}
 }
+
+func TestDispatcher_DoesNotMatchWithoutSlash(t *testing.T) {
+	d := NewDispatcher(NewRegistry([]Definition{{Name: "help"}}))
+
+	res := d.Dispatch(context.Background(), Request{
+		Channel: "telegram",
+		Text:    "help",
+	})
+	if res.Matched {
+		t.Fatalf("expected unmatched for plain text, got %+v", res)
+	}
+}
+
+func TestDispatcher_MatchTelegramMentionSyntax(t *testing.T) {
+	called := false
+	d := NewDispatcher(NewRegistry([]Definition{
+		{
+			Name: "help",
+			Handler: func(context.Context, Request) error {
+				called = true
+				return nil
+			},
+		},
+	}))
+
+	res := d.Dispatch(context.Background(), Request{
+		Channel: "telegram",
+		Text:    "/help@my_bot",
+	})
+	if !res.Matched || !res.Handled || !called || res.Err != nil {
+		t.Fatalf("dispatch result = %+v, called=%v", res, called)
+	}
+}