Merge pull request #692 from DaydreamCoding/feat/CC_UA

feat(gateway): 添加 Claude Code 客户端最低版本检查功能

backend/cmd/server/wire_gen.go

@@ -196,7 +196,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	adminAPIKeyHandler := admin.NewAdminAPIKeyHandler(adminService)
 	adminHandlers := handler.ProvideAdminHandlers(dashboardHandler, adminUserHandler, groupHandler, accountHandler, adminAnnouncementHandler, dataManagementHandler, oAuthHandler, openAIOAuthHandler, geminiOAuthHandler, antigravityOAuthHandler, proxyHandler, adminRedeemHandler, promoHandler, settingHandler, opsHandler, systemHandler, adminSubscriptionHandler, adminUsageHandler, userAttributeHandler, errorPassthroughHandler, adminAPIKeyHandler)
 	usageRecordWorkerPool := service.NewUsageRecordWorkerPool(configConfig)
-	gatewayHandler := handler.NewGatewayHandler(gatewayService, geminiMessagesCompatService, antigravityGatewayService, userService, concurrencyService, billingCacheService, usageService, apiKeyService, usageRecordWorkerPool, errorPassthroughService, configConfig)
+	gatewayHandler := handler.NewGatewayHandler(gatewayService, geminiMessagesCompatService, antigravityGatewayService, userService, concurrencyService, billingCacheService, usageService, apiKeyService, usageRecordWorkerPool, errorPassthroughService, configConfig, settingService)
 	openAIGatewayHandler := handler.NewOpenAIGatewayHandler(openAIGatewayService, concurrencyService, billingCacheService, apiKeyService, usageRecordWorkerPool, errorPassthroughService, configConfig)
 	soraSDKClient := service.ProvideSoraSDKClient(configConfig, httpUpstream, openAITokenProvider, accountRepository, soraAccountRepository)
 	soraMediaStorage := service.ProvideSoraMediaStorage(configConfig)

backend/internal/handler/admin/setting_handler.go

@@ -3,6 +3,8 @@ package admin
 import (
 	"fmt"
 	"log"
+	"net/http"
+	"regexp"
 	"strings"
 	"time"
 
@@ -15,6 +17,9 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+// semverPattern 预编译 semver 格式校验正则
+var semverPattern = regexp.MustCompile(`^\d+\.\d+\.\d+$`)
+
 // SettingHandler 系统设置处理器
 type SettingHandler struct {
 	settingService   *service.SettingService
@@ -93,6 +98,7 @@ func (h *SettingHandler) GetSettings(c *gin.Context) {
 		OpsRealtimeMonitoringEnabled:         settings.OpsRealtimeMonitoringEnabled,
 		OpsQueryModeDefault:                  settings.OpsQueryModeDefault,
 		OpsMetricsIntervalSeconds:            settings.OpsMetricsIntervalSeconds,
+		MinClaudeCodeVersion:                 settings.MinClaudeCodeVersion,
 	})
 }
 
@@ -159,6 +165,8 @@ type UpdateSettingsRequest struct {
 	OpsRealtimeMonitoringEnabled *bool   `json:"ops_realtime_monitoring_enabled"`
 	OpsQueryModeDefault          *string `json:"ops_query_mode_default"`
 	OpsMetricsIntervalSeconds    *int    `json:"ops_metrics_interval_seconds"`
+
+	MinClaudeCodeVersion string `json:"min_claude_code_version"`
 }
 
 // UpdateSettings 更新系统设置
@@ -293,6 +301,14 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		req.OpsMetricsIntervalSeconds = &v
 	}
 
+	// 验证最低版本号格式（空字符串=禁用，或合法 semver）
+	if req.MinClaudeCodeVersion != "" {
+		if !semverPattern.MatchString(req.MinClaudeCodeVersion) {
+			response.Error(c, http.StatusBadRequest, "min_claude_code_version must be empty or a valid semver (e.g. 2.1.63)")
+			return
+		}
+	}
+
 	settings := &service.SystemSettings{
 		RegistrationEnabled:         req.RegistrationEnabled,
 		EmailVerifyEnabled:          req.EmailVerifyEnabled,
@@ -334,6 +350,7 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		FallbackModelAntigravity:    req.FallbackModelAntigravity,
 		EnableIdentityPatch:         req.EnableIdentityPatch,
 		IdentityPatchPrompt:         req.IdentityPatchPrompt,
+		MinClaudeCodeVersion:        req.MinClaudeCodeVersion,
 		OpsMonitoringEnabled: func() bool {
 			if req.OpsMonitoringEnabled != nil {
 				return *req.OpsMonitoringEnabled
@@ -420,6 +437,7 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		OpsRealtimeMonitoringEnabled:         updatedSettings.OpsRealtimeMonitoringEnabled,
 		OpsQueryModeDefault:                  updatedSettings.OpsQueryModeDefault,
 		OpsMetricsIntervalSeconds:            updatedSettings.OpsMetricsIntervalSeconds,
+		MinClaudeCodeVersion:                 updatedSettings.MinClaudeCodeVersion,
 	})
 }
 
@@ -562,6 +580,9 @@ func diffSettings(before *service.SystemSettings, after *service.SystemSettings,
 	if before.OpsMetricsIntervalSeconds != after.OpsMetricsIntervalSeconds {
 		changed = append(changed, "ops_metrics_interval_seconds")
 	}
+	if before.MinClaudeCodeVersion != after.MinClaudeCodeVersion {
+		changed = append(changed, "min_claude_code_version")
+	}
 	return changed
 }
 

backend/internal/handler/dto/settings.go

@@ -58,6 +58,8 @@ type SystemSettings struct {
 	OpsRealtimeMonitoringEnabled bool   `json:"ops_realtime_monitoring_enabled"`
 	OpsQueryModeDefault          string `json:"ops_query_mode_default"`
 	OpsMetricsIntervalSeconds    int    `json:"ops_metrics_interval_seconds"`
+
+	MinClaudeCodeVersion string `json:"min_claude_code_version"`
 }
 
 type PublicSettings struct {

backend/internal/handler/gateway_handler.go

@@ -48,6 +48,7 @@ type GatewayHandler struct {
 	maxAccountSwitches        int
 	maxAccountSwitchesGemini  int
 	cfg                       *config.Config
+	settingService            *service.SettingService
 }
 
 // NewGatewayHandler creates a new GatewayHandler
@@ -63,6 +64,7 @@ func NewGatewayHandler(
 	usageRecordWorkerPool *service.UsageRecordWorkerPool,
 	errorPassthroughService *service.ErrorPassthroughService,
 	cfg *config.Config,
+	settingService *service.SettingService,
 ) *GatewayHandler {
 	pingInterval := time.Duration(0)
 	maxAccountSwitches := 10
@@ -90,6 +92,7 @@ func NewGatewayHandler(
 		maxAccountSwitches:        maxAccountSwitches,
 		maxAccountSwitchesGemini:  maxAccountSwitchesGemini,
 		cfg:                       cfg,
+		settingService:            settingService,
 	}
 }
 
@@ -155,6 +158,11 @@ func (h *GatewayHandler) Messages(c *gin.Context) {
 	SetClaudeCodeClientContext(c, body, parsedReq)
 	isClaudeCodeClient := service.IsClaudeCodeClient(c.Request.Context())
 
+	// 版本检查：仅对 Claude Code 客户端，拒绝低于最低版本的请求
+	if !h.checkClaudeCodeVersion(c) {
+		return
+	}
+
 	// 在请求上下文中记录 thinking 状态，供 Antigravity 最终模型 key 推导/模型维度限流使用
 	c.Request = c.Request.WithContext(service.WithThinkingEnabled(c.Request.Context(), parsedReq.ThinkingEnabled, h.metadataBridgeEnabled()))
 
@@ -1003,6 +1011,41 @@ func (h *GatewayHandler) ensureForwardErrorResponse(c *gin.Context, streamStarte
 	return true
 }
 
+// checkClaudeCodeVersion 检查 Claude Code 客户端版本是否满足最低要求
+// 仅对已识别的 Claude Code 客户端执行，count_tokens 路径除外
+func (h *GatewayHandler) checkClaudeCodeVersion(c *gin.Context) bool {
+	ctx := c.Request.Context()
+	if !service.IsClaudeCodeClient(ctx) {
+		return true
+	}
+
+	// 排除 count_tokens 子路径
+	if strings.HasSuffix(c.Request.URL.Path, "/count_tokens") {
+		return true
+	}
+
+	minVersion := h.settingService.GetMinClaudeCodeVersion(ctx)
+	if minVersion == "" {
+		return true // 未设置，不检查
+	}
+
+	clientVersion := service.GetClaudeCodeVersion(ctx)
+	if clientVersion == "" {
+		h.errorResponse(c, http.StatusBadRequest, "invalid_request_error",
+			"Unable to determine Claude Code version. Please update Claude Code: npm update -g @anthropic-ai/claude-code")
+		return false
+	}
+
+	if service.CompareVersions(clientVersion, minVersion) < 0 {
+		h.errorResponse(c, http.StatusBadRequest, "invalid_request_error",
+			fmt.Sprintf("Your Claude Code version (%s) is below the minimum required version (%s). Please update: npm update -g @anthropic-ai/claude-code",
+				clientVersion, minVersion))
+		return false
+	}
+
+	return true
+}
+
 // errorResponse 返回Claude API格式的错误响应
 func (h *GatewayHandler) errorResponse(c *gin.Context, status int, errType, message string) {
 	c.JSON(status, gin.H{

backend/internal/handler/gateway_helper.go

@@ -29,8 +29,10 @@ func SetClaudeCodeClientContext(c *gin.Context, body []byte, parsedReq *service.
 	if parsedReq != nil {
 		c.Set(claudeCodeParsedRequestContextKey, parsedReq)
 	}
+
+	ua := c.GetHeader("User-Agent")
 	// Fast path：非 Claude CLI UA 直接判定 false，避免热路径二次 JSON 反序列化。
-	if !claudeCodeValidator.ValidateUserAgent(c.GetHeader("User-Agent")) {
+	if !claudeCodeValidator.ValidateUserAgent(ua) {
 		ctx := service.SetClaudeCodeClient(c.Request.Context(), false)
 		c.Request = c.Request.WithContext(ctx)
 		return
@@ -54,6 +56,14 @@ func SetClaudeCodeClientContext(c *gin.Context, body []byte, parsedReq *service.
 
 	// 更新 request context
 	ctx := service.SetClaudeCodeClient(c.Request.Context(), isClaudeCode)
+
+	// 仅在确认为 Claude Code 客户端时提取版本号写入 context
+	if isClaudeCode {
+		if version := claudeCodeValidator.ExtractVersion(ua); version != "" {
+			ctx = service.SetClaudeCodeVersion(ctx, version)
+		}
+	}
+
 	c.Request = c.Request.WithContext(ctx)
 }
 

backend/internal/pkg/ctxkey/ctxkey.go

@@ -52,4 +52,7 @@ const (
 	// PrefetchedStickyGroupID 标识上游预取 sticky session 时所使用的分组 ID。
 	// Service 层仅在分组匹配时复用 PrefetchedStickyAccountID，避免分组切换重试误用旧 sticky。
 	PrefetchedStickyGroupID Key = "ctx_prefetched_sticky_group_id"
+
+	// ClaudeCodeVersion stores the extracted Claude Code version from User-Agent (e.g. "2.1.22")
+	ClaudeCodeVersion Key = "ctx_claude_code_version"
 )

backend/internal/server/api_contract_test.go

@@ -511,7 +511,8 @@ func TestAPIContracts(t *testing.T) {
 						"home_content": "",
 					"hide_ccs_import_button": false,
 					"purchase_subscription_enabled": false,
-					"purchase_subscription_url": ""
+					"purchase_subscription_url": "",
+					"min_claude_code_version": ""
 				}
 			}`,
 		},

backend/internal/service/claude_code_validator.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"net/http"
 	"regexp"
+	"strconv"
 	"strings"
 
 	"github.com/Wei-Shaw/sub2api/internal/pkg/ctxkey"
@@ -17,6 +18,9 @@ var (
 	// User-Agent 匹配: claude-cli/x.x.x (仅支持官方 CLI，大小写不敏感)
 	claudeCodeUAPattern = regexp.MustCompile(`(?i)^claude-cli/\d+\.\d+\.\d+`)
 
+	// 带捕获组的版本提取正则
+	claudeCodeUAVersionPattern = regexp.MustCompile(`(?i)^claude-cli/(\d+\.\d+\.\d+)`)
+
 	// metadata.user_id 格式: user_{64位hex}_account__session_{uuid}
 	userIDPattern = regexp.MustCompile(`^user_[a-fA-F0-9]{64}_account__session_[\w-]+$`)
 
@@ -270,3 +274,55 @@ func IsClaudeCodeClient(ctx context.Context) bool {
 func SetClaudeCodeClient(ctx context.Context, isClaudeCode bool) context.Context {
 	return context.WithValue(ctx, ctxkey.IsClaudeCodeClient, isClaudeCode)
 }
+
+// ExtractVersion 从 User-Agent 中提取 Claude Code 版本号
+// 返回 "2.1.22" 形式的版本号，如果不匹配返回空字符串
+func (v *ClaudeCodeValidator) ExtractVersion(ua string) string {
+	matches := claudeCodeUAVersionPattern.FindStringSubmatch(ua)
+	if len(matches) >= 2 {
+		return matches[1]
+	}
+	return ""
+}
+
+// SetClaudeCodeVersion 将 Claude Code 版本号设置到 context 中
+func SetClaudeCodeVersion(ctx context.Context, version string) context.Context {
+	return context.WithValue(ctx, ctxkey.ClaudeCodeVersion, version)
+}
+
+// GetClaudeCodeVersion 从 context 中获取 Claude Code 版本号
+func GetClaudeCodeVersion(ctx context.Context) string {
+	if v, ok := ctx.Value(ctxkey.ClaudeCodeVersion).(string); ok {
+		return v
+	}
+	return ""
+}
+
+// CompareVersions 比较两个 semver 版本号
+// 返回: -1 (a < b), 0 (a == b), 1 (a > b)
+func CompareVersions(a, b string) int {
+	aParts := parseSemver(a)
+	bParts := parseSemver(b)
+	for i := 0; i < 3; i++ {
+		if aParts[i] < bParts[i] {
+			return -1
+		}
+		if aParts[i] > bParts[i] {
+			return 1
+		}
+	}
+	return 0
+}
+
+// parseSemver 解析 semver 版本号为 [major, minor, patch]
+func parseSemver(v string) [3]int {
+	v = strings.TrimPrefix(v, "v")
+	parts := strings.Split(v, ".")
+	result := [3]int{0, 0, 0}
+	for i := 0; i < len(parts) && i < 3; i++ {
+		if parsed, err := strconv.Atoi(parts[i]); err == nil {
+			result[i] = parsed
+		}
+	}
+	return result
+}

backend/internal/service/claude_code_validator_test.go

@@ -56,3 +56,51 @@ func TestClaudeCodeValidator_NonMessagesPathUAOnly(t *testing.T) {
 	ok := validator.Validate(req, nil)
 	require.True(t, ok)
 }
+
+func TestExtractVersion(t *testing.T) {
+	v := NewClaudeCodeValidator()
+	tests := []struct {
+		ua   string
+		want string
+	}{
+		{"claude-cli/2.1.22 (darwin; arm64)", "2.1.22"},
+		{"claude-cli/1.0.0", "1.0.0"},
+		{"Claude-CLI/3.10.5 (linux; x86_64)", "3.10.5"}, // 大小写不敏感
+		{"curl/8.0.0", ""},                              // 非 Claude CLI
+		{"", ""},                                        // 空字符串
+		{"claude-cli/", ""},                             // 无版本号
+		{"claude-cli/2.1.22-beta", "2.1.22"},            // 带后缀仍提取主版本号
+	}
+	for _, tt := range tests {
+		got := v.ExtractVersion(tt.ua)
+		require.Equal(t, tt.want, got, "ExtractVersion(%q)", tt.ua)
+	}
+}
+
+func TestCompareVersions(t *testing.T) {
+	tests := []struct {
+		a, b string
+		want int
+	}{
+		{"2.1.0", "2.1.0", 0},   // 相等
+		{"2.1.1", "2.1.0", 1},   // patch 更大
+		{"2.0.0", "2.1.0", -1},  // minor 更小
+		{"3.0.0", "2.99.99", 1}, // major 更大
+		{"1.0.0", "2.0.0", -1},  // major 更小
+		{"0.0.1", "0.0.0", 1},   // patch 差异
+		{"", "1.0.0", -1},       // 空字符串 vs 正常版本
+		{"v2.1.0", "2.1.0", 0},  // v 前缀处理
+	}
+	for _, tt := range tests {
+		got := CompareVersions(tt.a, tt.b)
+		require.Equal(t, tt.want, got, "CompareVersions(%q, %q)", tt.a, tt.b)
+	}
+}
+
+func TestSetGetClaudeCodeVersion(t *testing.T) {
+	ctx := context.Background()
+	require.Equal(t, "", GetClaudeCodeVersion(ctx), "empty context should return empty string")
+
+	ctx = SetClaudeCodeVersion(ctx, "2.1.63")
+	require.Equal(t, "2.1.63", GetClaudeCodeVersion(ctx))
+}

backend/internal/service/domain_constants.go

@@ -192,6 +192,13 @@ const (
 	// =========================
 
 	SettingKeySoraDefaultStorageQuotaBytes = "sora_default_storage_quota_bytes" // 新用户默认 Sora 存储配额（字节）
+
+	// =========================
+	// Claude Code Version Check
+	// =========================
+
+	// SettingKeyMinClaudeCodeVersion 最低 Claude Code 版本号要求 (semver, 如 "2.1.0"，空值=不检查)
+	SettingKeyMinClaudeCodeVersion = "min_claude_code_version"
 )
 
 // AdminAPIKeyPrefix is the prefix for admin API keys (distinct from user "sk-" keys).

backend/internal/service/setting_service.go

@@ -7,12 +7,15 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"log/slog"
 	"strconv"
 	"strings"
+	"sync/atomic"
 	"time"
 
 	"github.com/Wei-Shaw/sub2api/internal/config"
 	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
+	"golang.org/x/sync/singleflight"
 )
 
 var (
@@ -32,6 +35,27 @@ type SettingRepository interface {
 	Delete(ctx context.Context, key string) error
 }
 
+// cachedMinVersion 缓存最低 Claude Code 版本号（进程内缓存，60s TTL）
+type cachedMinVersion struct {
+	value     string // 空字符串 = 不检查
+	expiresAt int64  // unix nano
+}
+
+// minVersionCache 最低版本号进程内缓存
+var minVersionCache atomic.Value // *cachedMinVersion
+
+// minVersionSF 防止缓存过期时 thundering herd
+var minVersionSF singleflight.Group
+
+// minVersionCacheTTL 缓存有效期
+const minVersionCacheTTL = 60 * time.Second
+
+// minVersionErrorTTL DB 错误时的短缓存，快速重试
+const minVersionErrorTTL = 5 * time.Second
+
+// minVersionDBTimeout singleflight 内 DB 查询超时，独立于请求 context
+const minVersionDBTimeout = 5 * time.Second
+
 // SettingService 系统设置服务
 type SettingService struct {
 	settingRepo SettingRepository
@@ -270,9 +294,20 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *SystemSet
 		updates[SettingKeyOpsMetricsIntervalSeconds] = strconv.Itoa(settings.OpsMetricsIntervalSeconds)
 	}
 
+	// Claude Code version check
+	updates[SettingKeyMinClaudeCodeVersion] = settings.MinClaudeCodeVersion
+
 	err := s.settingRepo.SetMultiple(ctx, updates)
-	if err == nil && s.onUpdate != nil {
-		s.onUpdate() // Invalidate cache after settings update
+	if err == nil {
+		// 先使 inflight singleflight 失效，再刷新缓存，缩小旧值覆盖新值的竞态窗口
+		minVersionSF.Forget("min_version")
+		minVersionCache.Store(&cachedMinVersion{
+			value:     settings.MinClaudeCodeVersion,
+			expiresAt: time.Now().Add(minVersionCacheTTL).UnixNano(),
+		})
+		if s.onUpdate != nil {
+			s.onUpdate() // Invalidate cache after settings update
+		}
 	}
 	return err
 }
@@ -417,6 +452,9 @@ func (s *SettingService) InitializeDefaultSettings(ctx context.Context) error {
 		SettingKeyOpsRealtimeMonitoringEnabled: "true",
 		SettingKeyOpsQueryModeDefault:          "auto",
 		SettingKeyOpsMetricsIntervalSeconds:    "60",
+
+		// Claude Code version check (default: empty = disabled)
+		SettingKeyMinClaudeCodeVersion: "",
 	}
 
 	return s.settingRepo.SetMultiple(ctx, defaults)
@@ -542,6 +580,9 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 		}
 	}
 
+	// Claude Code version check
+	result.MinClaudeCodeVersion = settings[SettingKeyMinClaudeCodeVersion]
+
 	return result
 }
 
@@ -839,6 +880,49 @@ func (s *SettingService) GetStreamTimeoutSettings(ctx context.Context) (*StreamT
 	return &settings, nil
 }
 
+// GetMinClaudeCodeVersion 获取最低 Claude Code 版本号要求
+// 使用进程内 atomic.Value 缓存，60 秒 TTL，热路径零锁开销
+// singleflight 防止缓存过期时 thundering herd
+// 返回空字符串表示不做版本检查
+func (s *SettingService) GetMinClaudeCodeVersion(ctx context.Context) string {
+	if cached, ok := minVersionCache.Load().(*cachedMinVersion); ok {
+		if time.Now().UnixNano() < cached.expiresAt {
+			return cached.value
+		}
+	}
+	// singleflight: 同一时刻只有一个 goroutine 查询 DB，其余复用结果
+	result, _, _ := minVersionSF.Do("min_version", func() (any, error) {
+		// 二次检查，避免排队的 goroutine 重复查询
+		if cached, ok := minVersionCache.Load().(*cachedMinVersion); ok {
+			if time.Now().UnixNano() < cached.expiresAt {
+				return cached.value, nil
+			}
+		}
+		// 使用独立 context：断开请求取消链，避免客户端断连导致空值被长期缓存
+		dbCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), minVersionDBTimeout)
+		defer cancel()
+		value, err := s.settingRepo.GetValue(dbCtx, SettingKeyMinClaudeCodeVersion)
+		if err != nil {
+			// fail-open: DB 错误时不阻塞请求，但记录日志并使用短 TTL 快速重试
+			slog.Warn("failed to get min claude code version setting, skipping version check", "error", err)
+			minVersionCache.Store(&cachedMinVersion{
+				value:     "",
+				expiresAt: time.Now().Add(minVersionErrorTTL).UnixNano(),
+			})
+			return "", nil
+		}
+		minVersionCache.Store(&cachedMinVersion{
+			value:     value,
+			expiresAt: time.Now().Add(minVersionCacheTTL).UnixNano(),
+		})
+		return value, nil
+	})
+	if s, ok := result.(string); ok {
+		return s
+	}
+	return ""
+}
+
 // SetStreamTimeoutSettings 设置流超时处理配置
 func (s *SettingService) SetStreamTimeoutSettings(ctx context.Context, settings *StreamTimeoutSettings) error {
 	if settings == nil {

backend/internal/service/settings_view.go

@@ -60,6 +60,9 @@ type SystemSettings struct {
 	OpsRealtimeMonitoringEnabled bool
 	OpsQueryModeDefault          string
 	OpsMetricsIntervalSeconds    int
+
+	// Claude Code version check
+	MinClaudeCodeVersion string
 }
 
 type PublicSettings struct {

frontend/src/api/admin/settings.ts

@@ -67,6 +67,9 @@ export interface SystemSettings {
   ops_realtime_monitoring_enabled: boolean
   ops_query_mode_default: 'auto' | 'raw' | 'preagg' | string
   ops_metrics_interval_seconds: number
+
+  // Claude Code version check
+  min_claude_code_version: string
 }
 
 export interface UpdateSettingsRequest {
@@ -114,6 +117,7 @@ export interface UpdateSettingsRequest {
   ops_realtime_monitoring_enabled?: boolean
   ops_query_mode_default?: 'auto' | 'raw' | 'preagg' | string
   ops_metrics_interval_seconds?: number
+  min_claude_code_version?: string
 }
 
 /**

frontend/src/i18n/locales/en.ts

@@ -3548,6 +3548,14 @@ export default {
         defaultConcurrency: 'Default Concurrency',
         defaultConcurrencyHint: 'Maximum concurrent requests for new users'
       },
+      claudeCode: {
+        title: 'Claude Code Settings',
+        description: 'Control Claude Code client access requirements',
+        minVersion: 'Minimum Version',
+        minVersionPlaceholder: 'e.g. 2.1.63',
+        minVersionHint:
+          'Reject Claude Code clients below this version (semver format). Leave empty to disable version check.'
+      },
       site: {
         title: 'Site Settings',
         description: 'Customize site branding',

frontend/src/i18n/locales/zh.ts

@@ -3718,6 +3718,13 @@ export default {
         defaultConcurrency: '默认并发数',
         defaultConcurrencyHint: '新用户的最大并发请求数'
       },
+      claudeCode: {
+        title: 'Claude Code 设置',
+        description: '控制 Claude Code 客户端访问要求',
+        minVersion: '最低版本号',
+        minVersionPlaceholder: '例如 2.1.63',
+        minVersionHint: '拒绝低于此版本的 Claude Code 客户端请求（semver 格式）。留空则不检查版本。'
+      },
       site: {
         title: '站点设置',
         description: '自定义站点品牌',

frontend/src/views/admin/SettingsView.vue

@@ -616,6 +616,35 @@
           </div>
         </div>
 
+        <!-- Claude Code Settings -->
+        <div class="card">
+          <div class="border-b border-gray-100 px-6 py-4 dark:border-dark-700">
+            <h2 class="text-lg font-semibold text-gray-900 dark:text-white">
+              {{ t('admin.settings.claudeCode.title') }}
+            </h2>
+            <p class="mt-1 text-sm text-gray-500 dark:text-gray-400">
+              {{ t('admin.settings.claudeCode.description') }}
+            </p>
+          </div>
+          <div class="p-6">
+            <div>
+              <label class="mb-2 block text-sm font-medium text-gray-700 dark:text-gray-300">
+                {{ t('admin.settings.claudeCode.minVersion') }}
+              </label>
+              <input
+                v-model="form.min_claude_code_version"
+                type="text"
+                class="input max-w-xs font-mono text-sm"
+                :placeholder="t('admin.settings.claudeCode.minVersionPlaceholder')"
+                pattern="\d+\.\d+\.\d+"
+              />
+              <p class="mt-1.5 text-xs text-gray-500 dark:text-gray-400">
+                {{ t('admin.settings.claudeCode.minVersionHint') }}
+              </p>
+            </div>
+          </div>
+        </div>
+
         <!-- Site Settings -->
         <div class="card">
           <div class="border-b border-gray-100 px-6 py-4 dark:border-dark-700">
@@ -1203,7 +1232,9 @@ const form = reactive<SettingsForm>({
   ops_monitoring_enabled: true,
   ops_realtime_monitoring_enabled: true,
   ops_query_mode_default: 'auto',
-  ops_metrics_interval_seconds: 60
+  ops_metrics_interval_seconds: 60,
+  // Claude Code version check
+  min_claude_code_version: ''
 })
 
 // LinuxDo OAuth redirect URL suggestion
@@ -1320,7 +1351,8 @@ async function saveSettings() {
       fallback_model_gemini: form.fallback_model_gemini,
       fallback_model_antigravity: form.fallback_model_antigravity,
       enable_identity_patch: form.enable_identity_patch,
-      identity_patch_prompt: form.identity_patch_prompt
+      identity_patch_prompt: form.identity_patch_prompt,
+      min_claude_code_version: form.min_claude_code_version
     }
     const updated = await adminAPI.settings.updateSettings(payload)
     Object.assign(form, updated)