refactor(executor): remove ClientAdapter and legacy fallback logic

- Deleted `ClientAdapter` implementation and associated fallback methods.
- Removed legacy executor logic from `codex`, `claude`, `gemini`, and `qwen` executors.
- Simplified `handlers` by eliminating `UnwrapError` handling and related dependencies.
- Cleaned up `model_registry` by removing logic associated with suspended clients.
- Updated `.gitignore` to ignore `.serena/` directory.

.gitignore

@@ -11,3 +11,4 @@ AGENTS.md
 CLAUDE.md
 *.exe
 temp/*
+.serena/

internal/api/handlers/handlers.go

@@ -10,7 +10,6 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/config"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/interfaces"
-	"github.com/router-for-me/CLIProxyAPI/v6/internal/runtime/executor"
 	"github.com/router-for-me/CLIProxyAPI/v6/internal/util"
 	coreauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
 	coreexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"
@@ -150,9 +149,6 @@ func (h *BaseAPIHandler) ExecuteWithAuthManager(ctx context.Context, handlerType
 	}
 	resp, err := h.AuthManager.Execute(ctx, providers, req, opts)
 	if err != nil {
-		if msg, ok := executor.UnwrapError(err); ok {
-			return nil, msg
-		}
 		return nil, &interfaces.ErrorMessage{StatusCode: http.StatusInternalServerError, Error: err}
 	}
 	return cloneBytes(resp.Payload), nil
@@ -177,9 +173,6 @@ func (h *BaseAPIHandler) ExecuteCountWithAuthManager(ctx context.Context, handle
 	}
 	resp, err := h.AuthManager.ExecuteCount(ctx, providers, req, opts)
 	if err != nil {
-		if msg, ok := executor.UnwrapError(err); ok {
-			return nil, msg
-		}
 		return nil, &interfaces.ErrorMessage{StatusCode: http.StatusInternalServerError, Error: err}
 	}
 	return cloneBytes(resp.Payload), nil
@@ -208,11 +201,7 @@ func (h *BaseAPIHandler) ExecuteStreamWithAuthManager(ctx context.Context, handl
 	chunks, err := h.AuthManager.ExecuteStream(ctx, providers, req, opts)
 	if err != nil {
 		errChan := make(chan *interfaces.ErrorMessage, 1)
-		if msg, ok := executor.UnwrapError(err); ok {
-			errChan <- msg
-		} else {
 		errChan <- &interfaces.ErrorMessage{StatusCode: http.StatusInternalServerError, Error: err}
-		}
 		close(errChan)
 		return nil, errChan
 	}
@@ -223,11 +212,7 @@ func (h *BaseAPIHandler) ExecuteStreamWithAuthManager(ctx context.Context, handl
 		defer close(errChan)
 		for chunk := range chunks {
 			if chunk.Err != nil {
-				if msg, ok := executor.UnwrapError(chunk.Err); ok {
-					errChan <- msg
-				} else {
 				errChan <- &interfaces.ErrorMessage{StatusCode: http.StatusInternalServerError, Error: chunk.Err}
-				}
 				return
 			}
 			if len(chunk.Payload) > 0 {

internal/registry/model_registry.go

@@ -393,23 +393,24 @@ func (r *ModelRegistry) GetModelProviders(modelID string) []string {
 		count int
 	}
 	providers := make([]providerCount, 0, len(registration.Providers))
-	suspendedByProvider := make(map[string]int)
-	if registration.SuspendedClients != nil {
-		for clientID := range registration.SuspendedClients {
-			if provider, ok := r.clientProviders[clientID]; ok && provider != "" {
-				suspendedByProvider[provider]++
-			}
-		}
-	}
+	// suspendedByProvider := make(map[string]int)
+	// if registration.SuspendedClients != nil {
+	// 	for clientID := range registration.SuspendedClients {
+	// 		if provider, ok := r.clientProviders[clientID]; ok && provider != "" {
+	// 			suspendedByProvider[provider]++
+	// 		}
+	// 	}
+	// }
 	for name, count := range registration.Providers {
 		if count <= 0 {
 			continue
 		}
-		adjusted := count - suspendedByProvider[name]
-		if adjusted <= 0 {
-			continue
-		}
-		providers = append(providers, providerCount{name: name, count: adjusted})
+		// adjusted := count - suspendedByProvider[name]
+		// if adjusted <= 0 {
+		// 	continue
+		// }
+		// providers = append(providers, providerCount{name: name, count: adjusted})
+		providers = append(providers, providerCount{name: name, count: count})
 	}
 	if len(providers) == 0 {
 		return nil

internal/runtime/executor/claude_executor.go

@@ -38,9 +38,7 @@ func (e *ClaudeExecutor) PrepareRequest(_ *http.Request, _ *cliproxyauth.Auth) e
 
 func (e *ClaudeExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {
 	apiKey, baseURL := claudeCreds(auth)
-	if apiKey == "" {
-		return NewClientAdapter("claude").Execute(ctx, auth, req, opts)
-	}
+
 	if baseURL == "" {
 		baseURL = "https://api.anthropic.com"
 	}
@@ -114,9 +112,7 @@ func (e *ClaudeExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, r
 
 func (e *ClaudeExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (<-chan cliproxyexecutor.StreamChunk, error) {
 	apiKey, baseURL := claudeCreds(auth)
-	if apiKey == "" {
-		return NewClientAdapter("claude").ExecuteStream(ctx, auth, req, opts)
-	}
+
 	if baseURL == "" {
 		baseURL = "https://api.anthropic.com"
 	}
@@ -177,9 +173,7 @@ func (e *ClaudeExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.A
 
 func (e *ClaudeExecutor) CountTokens(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {
 	apiKey, baseURL := claudeCreds(auth)
-	if apiKey == "" {
-		return NewClientAdapter("claude").Execute(ctx, auth, req, opts)
-	}
+
 	if baseURL == "" {
 		baseURL = "https://api.anthropic.com"
 	}

internal/runtime/executor/client_executor.go

@@ -1,185 +0,0 @@
-package executor
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"net/http"
-	"sync"
-
-	"github.com/router-for-me/CLIProxyAPI/v6/internal/interfaces"
-	cliproxyauth "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/auth"
-	cliproxyexecutor "github.com/router-for-me/CLIProxyAPI/v6/sdk/cliproxy/executor"
-)
-
-// ClientAdapter bridges legacy stateful clients to the new ProviderExecutor contract.
-type ClientAdapter struct {
-	provider string
-}
-
-// NewClientAdapter creates a new adapter for the specified provider key.
-func NewClientAdapter(provider string) *ClientAdapter {
-	return &ClientAdapter{provider: provider}
-}
-
-// Identifier implements cliproxyauth.ProviderExecutor.
-func (a *ClientAdapter) Identifier() string {
-	return a.provider
-}
-
-// PrepareRequest implements optional request preparation hook (no-op for legacy clients).
-func (a *ClientAdapter) PrepareRequest(req *http.Request, auth *cliproxyauth.Auth) error { return nil }
-
-// Execute implements cliproxyauth.ProviderExecutor.
-func (a *ClientAdapter) Execute(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {
-	client, mutex, err := resolveLegacyClient(auth)
-	if err != nil {
-		return cliproxyexecutor.Response{}, err
-	}
-	unlock := lock(mutex)
-	defer unlock()
-
-	// Support special actions via request metadata (e.g., countTokens)
-	if req.Metadata != nil {
-		if action, _ := req.Metadata["action"].(string); action == "countTokens" {
-			if tc, ok := any(client).(interface {
-				SendRawTokenCount(ctx context.Context, modelName string, rawJSON []byte, alt string) ([]byte, *interfaces.ErrorMessage)
-			}); ok {
-				payload, errMsg := tc.SendRawTokenCount(ctx, req.Model, req.Payload, opts.Alt)
-				if errMsg != nil {
-					return cliproxyexecutor.Response{}, errorFromMessage(errMsg)
-				}
-				return cliproxyexecutor.Response{Payload: payload}, nil
-			}
-			return cliproxyexecutor.Response{}, fmt.Errorf("legacy client does not support countTokens")
-		}
-	}
-
-	payload, errMsg := client.SendRawMessage(ctx, req.Model, req.Payload, opts.Alt)
-	if errMsg != nil {
-		return cliproxyexecutor.Response{}, errorFromMessage(errMsg)
-	}
-	return cliproxyexecutor.Response{Payload: payload}, nil
-}
-
-// ExecuteStream implements cliproxyauth.ProviderExecutor.
-func (a *ClientAdapter) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (<-chan cliproxyexecutor.StreamChunk, error) {
-	client, mutex, err := resolveLegacyClient(auth)
-	if err != nil {
-		return nil, err
-	}
-	unlock := lock(mutex)
-
-	dataCh, errCh := client.SendRawMessageStream(ctx, req.Model, req.Payload, opts.Alt)
-	if dataCh == nil {
-		unlock()
-		if errCh != nil {
-			if msg := <-errCh; msg != nil {
-				return nil, errorFromMessage(msg)
-			}
-		}
-		return nil, errors.New("stream not available")
-	}
-
-	out := make(chan cliproxyexecutor.StreamChunk)
-	go func() {
-		defer close(out)
-		defer unlock()
-		for chunk := range dataCh {
-			if chunk == nil {
-				continue
-			}
-			out <- cliproxyexecutor.StreamChunk{Payload: chunk}
-		}
-		if errCh != nil {
-			if msg, ok := <-errCh; ok && msg != nil {
-				out <- cliproxyexecutor.StreamChunk{Err: errorFromMessage(msg)}
-			}
-		}
-	}()
-	return out, nil
-}
-
-func (e *ClientAdapter) CountTokens(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {
-	return cliproxyexecutor.Response{Payload: []byte{}}, nil
-}
-
-// Refresh delegates to the legacy client's refresh logic when available.
-func (a *ClientAdapter) Refresh(ctx context.Context, auth *cliproxyauth.Auth) (*cliproxyauth.Auth, error) {
-	client, _, err := resolveLegacyClient(auth)
-	if err != nil {
-		return nil, err
-	}
-	if refresher, ok := client.(interface{ RefreshTokens(context.Context) error }); ok {
-		if errRefresh := refresher.RefreshTokens(ctx); errRefresh != nil {
-			return nil, errRefresh
-		}
-	}
-	return auth, nil
-}
-
-// legacyClient defines the minimum surface required from the historical clients.
-type legacyClient interface {
-	SendRawMessage(ctx context.Context, modelName string, rawJSON []byte, alt string) ([]byte, *interfaces.ErrorMessage)
-	SendRawMessageStream(ctx context.Context, modelName string, rawJSON []byte, alt string) (<-chan []byte, <-chan *interfaces.ErrorMessage)
-	GetRequestMutex() *sync.Mutex
-}
-
-func resolveLegacyClient(auth *cliproxyauth.Auth) (legacyClient, *sync.Mutex, error) {
-	if auth == nil {
-		return nil, nil, fmt.Errorf("legacy adapter: auth is nil")
-	}
-	client, ok := auth.Runtime.(legacyClient)
-	if !ok || client == nil {
-		return nil, nil, fmt.Errorf("legacy adapter: runtime client missing for %s", auth.ID)
-	}
-	return client, client.GetRequestMutex(), nil
-}
-
-func lock(mutex *sync.Mutex) func() {
-	if mutex == nil {
-		return func() {}
-	}
-	mutex.Lock()
-	return func() {
-		mutex.Unlock()
-	}
-}
-
-func errorFromMessage(msg *interfaces.ErrorMessage) error {
-	if msg == nil {
-		return nil
-	}
-	return legacyError{message: msg}
-}
-
-type legacyError struct {
-	message *interfaces.ErrorMessage
-}
-
-func (e legacyError) Error() string {
-	if e.message == nil {
-		return "legacy client error"
-	}
-	if e.message.Error != nil {
-		return e.message.Error.Error()
-	}
-	return fmt.Sprintf("legacy client error: status %d", e.message.StatusCode)
-}
-
-// StatusCode implements executor.StatusError, exposing HTTP-like status.
-func (e legacyError) StatusCode() int {
-	if e.message != nil {
-		return e.message.StatusCode
-	}
-	return 0
-}
-
-// UnwrapError extracts the legacy interfaces.ErrorMessage from adapter errors.
-func UnwrapError(err error) (*interfaces.ErrorMessage, bool) {
-	var legacy legacyError
-	if errors.As(err, &legacy) {
-		return legacy.message, true
-	}
-	return nil, false
-}

internal/runtime/executor/codex_executor.go

@@ -41,9 +41,7 @@ func (e *CodexExecutor) PrepareRequest(_ *http.Request, _ *cliproxyauth.Auth) er
 
 func (e *CodexExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {
 	apiKey, baseURL := codexCreds(auth)
-	if apiKey == "" {
-		return NewClientAdapter("codex").Execute(ctx, auth, req, opts)
-	}
+
 	if baseURL == "" {
 		baseURL = "https://chatgpt.com/backend-api/codex"
 	}
@@ -136,9 +134,7 @@ func (e *CodexExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, re
 
 func (e *CodexExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (<-chan cliproxyexecutor.StreamChunk, error) {
 	apiKey, baseURL := codexCreds(auth)
-	if apiKey == "" {
-		return NewClientAdapter("codex").ExecuteStream(ctx, auth, req, opts)
-	}
+
 	if baseURL == "" {
 		baseURL = "https://chatgpt.com/backend-api/codex"
 	}

internal/runtime/executor/gemini_executor.go

@@ -40,10 +40,7 @@ func (e *GeminiExecutor) PrepareRequest(_ *http.Request, _ *cliproxyauth.Auth) e
 
 func (e *GeminiExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {
 	apiKey, bearer := geminiCreds(auth)
-	if apiKey == "" && bearer == "" {
-		// Fallback to legacy client
-		return NewClientAdapter("gemini").Execute(ctx, auth, req, opts)
-	}
+
 	reporter := newUsageReporter(ctx, e.Identifier(), req.Model, auth)
 
 	// Official Gemini API via API key or OAuth bearer
@@ -102,10 +99,7 @@ func (e *GeminiExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, r
 
 func (e *GeminiExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (<-chan cliproxyexecutor.StreamChunk, error) {
 	apiKey, bearer := geminiCreds(auth)
-	if apiKey == "" && bearer == "" {
-		// Fallback to legacy streaming
-		return NewClientAdapter("gemini").ExecuteStream(ctx, auth, req, opts)
-	}
+
 	reporter := newUsageReporter(ctx, e.Identifier(), req.Model, auth)
 
 	from := opts.SourceFormat

internal/runtime/executor/qwen_executor.go

@@ -40,9 +40,7 @@ func (e *QwenExecutor) PrepareRequest(_ *http.Request, _ *cliproxyauth.Auth) err
 
 func (e *QwenExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (cliproxyexecutor.Response, error) {
 	token, baseURL := qwenCreds(auth)
-	if token == "" {
-		return NewClientAdapter("qwen").Execute(ctx, auth, req, opts)
-	}
+
 	if baseURL == "" {
 		baseURL = "https://portal.qwen.ai/v1"
 	}
@@ -88,9 +86,7 @@ func (e *QwenExecutor) Execute(ctx context.Context, auth *cliproxyauth.Auth, req
 
 func (e *QwenExecutor) ExecuteStream(ctx context.Context, auth *cliproxyauth.Auth, req cliproxyexecutor.Request, opts cliproxyexecutor.Options) (<-chan cliproxyexecutor.StreamChunk, error) {
 	token, baseURL := qwenCreds(auth)
-	if token == "" {
-		return NewClientAdapter("qwen").ExecuteStream(ctx, auth, req, opts)
-	}
+
 	if baseURL == "" {
 		baseURL = "https://portal.qwen.ai/v1"
 	}