diff --git a/Dockerfile b/Dockerfile
index a16eb958..74ad8508 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@
 # =============================================================================
 
 ARG NODE_IMAGE=node:24-alpine
-ARG GOLANG_IMAGE=golang:1.26.1-alpine
+ARG GOLANG_IMAGE=golang:1.26.1
 ARG ALPINE_IMAGE=alpine:3.21
 ARG POSTGRES_IMAGE=postgres:18-alpine
 ARG GOPROXY=https://goproxy.cn,direct
@@ -46,8 +46,8 @@ ARG GOSUMDB
 ENV GOPROXY=${GOPROXY}
 ENV GOSUMDB=${GOSUMDB}
 
-# Install build dependencies
-RUN apk add --no-cache git ca-certificates tzdata
+# Install build dependencies (non-alpine image uses apt)
+RUN apt-get update && apt-get install -y --no-install-recommends git ca-certificates && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app/backend
 
@@ -61,14 +61,14 @@ COPY backend/ ./
 # Copy frontend dist from previous stage (must be after backend copy to avoid being overwritten)
 COPY --from=frontend-builder /app/backend/internal/web/dist ./internal/web/dist
 
-# Build the binary (BuildType=release for CI builds, embed frontend)
-# Version precedence: build arg VERSION > cmd/server/VERSION
+# Build the binary with BoringCrypto (matches real Antigravity TLS fingerprint)
+# CGO_ENABLED=1 required for BoringCrypto; static linking via -extldflags for scratch-like deployment
 RUN VERSION_VALUE="${VERSION}" && \
     if [ -z "${VERSION_VALUE}" ]; then VERSION_VALUE="$(tr -d '\r\n' < ./cmd/server/VERSION)"; fi && \
     DATE_VALUE="${DATE:-$(date -u +%Y-%m-%dT%H:%M:%SZ)}" && \
-    CGO_ENABLED=0 GOOS=linux go build \
+    CGO_ENABLED=1 GOEXPERIMENT=boringcrypto GOOS=linux go build \
     -tags embed \
-    -ldflags="-s -w -X main.Version=${VERSION_VALUE} -X main.Commit=${COMMIT} -X main.Date=${DATE_VALUE} -X main.BuildType=release" \
+    -ldflags="-s -w -linkmode external -extldflags '-static' -X main.Version=${VERSION_VALUE} -X main.Commit=${COMMIT} -X main.Date=${DATE_VALUE} -X main.BuildType=release" \
     -trimpath \
     -o /app/sub2api \
     ./cmd/server
diff --git a/antigravity/node-tls-proxy/proxy.js b/antigravity/node-tls-proxy/proxy.js
index 1233ea88..f827f737 100644
--- a/antigravity/node-tls-proxy/proxy.js
+++ b/antigravity/node-tls-proxy/proxy.js
@@ -16,10 +16,10 @@ const CONNECT_TIMEOUT = parseInt(process.env.CONNECT_TIMEOUT || '30000', 10);
 const IDLE_TIMEOUT = parseInt(process.env.IDLE_TIMEOUT || '600000', 10);
 const TELEMETRY_ENABLED = process.env.TELEMETRY_ENABLED !== 'false'; // 默认开启
 const DD_API_KEY = process.env.DD_API_KEY || 'pubbbf48e6d78dae54bceaa4acf463299bf';
-const CLI_VERSION = process.env.CLI_VERSION || '2.1.81';
-const BUILD_TIME = process.env.BUILD_TIME || '2026-03-20T21:26:18Z';
-// 伪装的 Node 版本（CLI 2.1.81 打包的 Node 版本）
-const FAKE_NODE_VERSION = process.env.FAKE_NODE_VERSION || 'v22.14.0';
+const CLI_VERSION = process.env.CLI_VERSION || '2.1.84';
+const BUILD_TIME = process.env.BUILD_TIME || '2026-03-25T23:49:18Z';
+// 伪装的 Node 版本（CLI 2.1.84 打包的 Bun 报告的 Node 兼容版本）
+const FAKE_NODE_VERSION = process.env.FAKE_NODE_VERSION || 'v24.3.0';
 
 const log = (level, msg, extra = {}) => {
   const entry = { time: new Date().toISOString(), level, msg, ...extra };
@@ -166,9 +166,9 @@ function buildEnvBlock(hostId) {
     platform: platformStr,
     node_version: FAKE_NODE_VERSION,
     terminal: hostId.terminal,
-    package_managers: 'npm',
-    runtimes: 'node',
-    is_running_with_bun: false,
+    package_managers: 'npm,pnpm',
+    runtimes: 'deno,node',
+    is_running_with_bun: true,
     is_ci: false,
     is_claubbit: false,
     is_github_action: false,
@@ -199,8 +199,8 @@ function buildProcessMetrics(uptime) {
     heapTotal,
     heapUsed,
     external: 14_000_000 + Math.floor(Math.random() * 2_000_000),
-    arrayBuffers: Math.floor(Math.random() * 10_000),
-    constrainedMemory: 0,
+    arrayBuffers: Math.floor(Math.random() * 200_000),
+    constrainedMemory: 51539607552,
     cpuUsage: {
       user: Math.floor(uptime * 10_000 + Math.random() * 300_000),
       system: Math.floor(uptime * 2_000 + Math.random() * 80_000),
@@ -251,12 +251,8 @@ function sendTelemetryEvents(events, session) {
     'x-service-name': 'claude-code',
     'Content-Length': Buffer.byteLength(body),
   };
-  // 如果有 session，注入 OTEL trace headers（匹配 CLI 的 W3C Trace Context）
-  if (session) {
-    const traceId = crypto.randomBytes(16).toString('hex');
-    const spanId = crypto.randomBytes(8).toString('hex');
-    headers['traceparent'] = `00-${traceId}-${spanId}-01`;
-  }
+  // 注意：真实 CLI 2.1.84 的 event_logging/batch 不发 traceparent
+  // traceparent 仅在 OTLP exporter（单独通道）中使用，不在这个端点
 
   const opts = {
     hostname: 'api.anthropic.com',
@@ -682,6 +678,8 @@ async function proxyRequest(req, res) {
     'api.anthropic.com',
     'cloudaicompanion.googleapis.com',
     'generativelanguage.googleapis.com',
+    'cloudcode-pa.googleapis.com',
+    'daily-cloudcode-pa.googleapis.com',
   ]);
   if (H2_PREFER_HOSTS.has(targetHost) || h2Hosts.has(targetHost)) {
     await sendViaH2(targetHost, req.method, req.url, req.headers, body, res, savedHeaders);
diff --git a/backend/Makefile b/backend/Makefile
index 7084ccb9..a3ecd015 100644
--- a/backend/Makefile
+++ b/backend/Makefile
@@ -4,7 +4,7 @@ VERSION ?= $(shell tr -d '\r\n' < ./cmd/server/VERSION)
 LDFLAGS ?= -s -w -X main.Version=$(VERSION)
 
 build:
-	CGO_ENABLED=0 go build -ldflags="$(LDFLAGS)" -trimpath -o bin/server ./cmd/server
+	CGO_ENABLED=1 GOEXPERIMENT=boringcrypto go build -ldflags="$(LDFLAGS)" -trimpath -o bin/server ./cmd/server
 
 generate:
 	go generate ./ent
diff --git a/backend/internal/pkg/antigravity/client.go b/backend/internal/pkg/antigravity/client.go
index e2802535..a278acd1 100644
--- a/backend/internal/pkg/antigravity/client.go
+++ b/backend/internal/pkg/antigravity/client.go
@@ -12,6 +12,7 @@ import (
 	"net"
 	"net/http"
 	"net/url"
+	"runtime"
 	"strings"
 	"time"
 
@@ -29,6 +30,21 @@ func (e *ForbiddenError) Error() string {
 	return fmt.Sprintf("fetchAvailableModels 失败 (HTTP %d): %s", e.StatusCode, e.Body)
 }
 
+// GetGoogAPIClient 返回 x-goog-api-client 头的值（导出供心跳等外部使用）
+// 格式与真实 Antigravity 的 Go SDK 一致: gl-go/{goVersion} gax-go/v2 grpc-go/1.81.0-dev
+func GetGoogAPIClient() string {
+	goVer := runtime.Version() // e.g. "go1.22.0"
+	return fmt.Sprintf("gl-go/%s gax-go/v2 grpc-go/1.81.0-dev", goVer)
+}
+
+// setAntigravityHeaders 设置与真实 Antigravity IDE 一致的 HTTP 请求头
+func setAntigravityHeaders(req *http.Request, accessToken string) {
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", "Bearer "+accessToken)
+	req.Header.Set("User-Agent", GetUserAgent())
+	req.Header.Set("X-Goog-Api-Client", GetGoogAPIClient())
+}
+
 // NewAPIRequestWithURL 使用指定的 base URL 创建 Antigravity API 请求（v1internal 端点）
 func NewAPIRequestWithURL(ctx context.Context, baseURL, action, accessToken string, body []byte) (*http.Request, error) {
 	// 构建 URL，流式请求添加 ?alt=sse 参数
@@ -43,10 +59,8 @@ func NewAPIRequestWithURL(ctx context.Context, baseURL, action, accessToken stri
 		return nil, err
 	}
 
-	// 基础 Headers（与 Antigravity-Manager 保持一致，只设置这 3 个）
-	req.Header.Set("Content-Type", "application/json")
-	req.Header.Set("Authorization", "Bearer "+accessToken)
-	req.Header.Set("User-Agent", GetUserAgent())
+	// 设置与真实 Antigravity IDE 一致的请求头
+	setAntigravityHeaders(req, accessToken)
 
 	return req, nil
 }
@@ -274,6 +288,11 @@ func NewClient(proxyURL string) (*Client, error) {
 	}, nil
 }
 
+// DoRaw 执行原始 HTTP 请求（供心跳等内部使用）
+func (c *Client) DoRaw(req *http.Request) (*http.Response, error) {
+	return c.httpClient.Do(req)
+}
+
 // IsConnectionError 判断是否为连接错误（网络超时、DNS 失败、连接拒绝）
 func IsConnectionError(err error) bool {
 	if err == nil {
@@ -451,6 +470,7 @@ func (c *Client) LoadCodeAssist(ctx context.Context, accessToken string) (*LoadC
 		req.Header.Set("Authorization", "Bearer "+accessToken)
 		req.Header.Set("Content-Type", "application/json")
 		req.Header.Set("User-Agent", GetUserAgent())
+		req.Header.Set("X-Goog-Api-Client", GetGoogAPIClient())
 
 		resp, err := c.httpClient.Do(req)
 		if err != nil {
@@ -530,6 +550,7 @@ func (c *Client) OnboardUser(ctx context.Context, accessToken, tierID string) (s
 			req.Header.Set("Authorization", "Bearer "+accessToken)
 			req.Header.Set("Content-Type", "application/json")
 			req.Header.Set("User-Agent", GetUserAgent())
+			req.Header.Set("X-Goog-Api-Client", GetGoogAPIClient())
 
 			resp, err := c.httpClient.Do(req)
 			if err != nil {
@@ -664,6 +685,7 @@ func (c *Client) FetchAvailableModels(ctx context.Context, accessToken, projectI
 		req.Header.Set("Authorization", "Bearer "+accessToken)
 		req.Header.Set("Content-Type", "application/json")
 		req.Header.Set("User-Agent", GetUserAgent())
+		req.Header.Set("X-Goog-Api-Client", GetGoogAPIClient())
 
 		resp, err := c.httpClient.Do(req)
 		if err != nil {
diff --git a/backend/internal/pkg/antigravity/oauth.go b/backend/internal/pkg/antigravity/oauth.go
index 8a8bed92..fdecbe92 100644
--- a/backend/internal/pkg/antigravity/oauth.go
+++ b/backend/internal/pkg/antigravity/oauth.go
@@ -9,6 +9,7 @@ import (
 	"net/http"
 	"net/url"
 	"os"
+	"runtime"
 	"strings"
 	"sync"
 	"time"
@@ -23,13 +24,16 @@ const (
 	UserInfoURL  = "https://www.googleapis.com/oauth2/v2/userinfo"
 
 	// Antigravity OAuth 客户端凭证
+	// 注意：真实 Antigravity 主 Client ID 是 884354919052-...，但需要对应的 client_secret
+	// 当前使用的 1071006060591-... 同样存在于真实二进制中（可能是备用登录模式）
+	// 如需切换，必须同时更新 client_secret（通过环境变量 ANTIGRAVITY_OAUTH_CLIENT_SECRET）
 	ClientID = "1071006060591-tmhssin2h21lcre235vtolojh4g403ep.apps.googleusercontent.com"
 
 	// AntigravityOAuthClientSecretEnv 是 Antigravity OAuth client_secret 的环境变量名。
 	AntigravityOAuthClientSecretEnv = "ANTIGRAVITY_OAUTH_CLIENT_SECRET"
 
-	// 固定的 redirect_uri（用户需手动复制 code）
-	RedirectURI = "http://localhost:8085/callback"
+	// redirect_uri — 真实 Antigravity IDE 使用 localhost 动态端口 + /oauth-callback 路径
+	RedirectURI = "http://localhost:8085/oauth-callback"
 
 	// OAuth scopes
 	Scopes = "https://www.googleapis.com/auth/cloud-platform " +
@@ -44,13 +48,13 @@ const (
 	// URL 可用性 TTL（不可用 URL 的恢复时间）
 	URLAvailabilityTTL = 5 * time.Minute
 
-	// Antigravity API 端点
+	// Antigravity API 端点（真实 Antigravity 日志确认使用 daily-cloudcode-pa 无 sandbox 后缀）
 	antigravityProdBaseURL  = "https://cloudcode-pa.googleapis.com"
-	antigravityDailyBaseURL = "https://daily-cloudcode-pa.sandbox.googleapis.com"
+	antigravityDailyBaseURL = "https://daily-cloudcode-pa.googleapis.com"
 )
 
-// defaultUserAgentVersion 可通过环境变量 ANTIGRAVITY_USER_AGENT_VERSION 配置，默认 1.20.5
-var defaultUserAgentVersion = "1.20.5"
+// defaultUserAgentVersion 可通过环境变量 ANTIGRAVITY_USER_AGENT_VERSION 配置，默认 0.2.0（匹配真实 extension 版本）
+var defaultUserAgentVersion = "0.2.0"
 
 // defaultClientSecret 可通过环境变量 ANTIGRAVITY_OAUTH_CLIENT_SECRET 配置
 var defaultClientSecret = "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"
@@ -66,9 +70,11 @@ func init() {
 	}
 }
 
-// GetUserAgent 返回当前配置的 User-Agent
+// GetUserAgent 返回当前配置的 User-Agent（匹配真实 Antigravity 格式: antigravity/{version} {os}/{arch}）
 func GetUserAgent() string {
-	return fmt.Sprintf("antigravity/%s windows/amd64", defaultUserAgentVersion)
+	osName := runtime.GOOS   // darwin, linux, windows
+	arch := runtime.GOARCH   // arm64, amd64
+	return fmt.Sprintf("antigravity/%s %s/%s", defaultUserAgentVersion, osName, arch)
 }
 
 func getClientSecret() (string, error) {
diff --git a/backend/internal/pkg/claude/constants.go b/backend/internal/pkg/claude/constants.go
index 629b6c93..c9c015bb 100644
--- a/backend/internal/pkg/claude/constants.go
+++ b/backend/internal/pkg/claude/constants.go
@@ -52,13 +52,13 @@ const APIKeyHaikuBetaHeader = BetaInterleavedThinking
 var DefaultHeaders = map[string]string{
 	// Keep these in sync with recent Claude CLI traffic to reduce the chance
 	// that Claude Code-scoped OAuth credentials are rejected as "non-CLI" usage.
-	"User-Agent":                                "claude-cli/2.1.81 (external, cli)",
+	"User-Agent":                                "claude-cli/2.1.84 (external, cli)",
 	"X-Stainless-Lang":                          "js",
-	"X-Stainless-Package-Version":               "0.80.0",
-	"X-Stainless-OS":                            "Linux",
+	"X-Stainless-Package-Version":               "0.74.0",
+	"X-Stainless-OS":                            "MacOS",
 	"X-Stainless-Arch":                          "arm64",
 	"X-Stainless-Runtime":                       "node",
-	"X-Stainless-Runtime-Version":               "v24.13.0",
+	"X-Stainless-Runtime-Version":               "v24.3.0",
 	"X-Stainless-Retry-Count":                   "0",
 	"X-Stainless-Timeout":                       "600",
 	"X-App":                                     "cli",
diff --git a/backend/internal/pkg/geminicli/constants.go b/backend/internal/pkg/geminicli/constants.go
index 97234ffd..9b204640 100644
--- a/backend/internal/pkg/geminicli/constants.go
+++ b/backend/internal/pkg/geminicli/constants.go
@@ -1,7 +1,12 @@
 // Package geminicli provides helpers for interacting with Gemini CLI tools.
 package geminicli
 
-import "time"
+import (
+	"fmt"
+	"runtime"
+	"strings"
+	"time"
+)
 
 const (
 	AIStudioBaseURL  = "https://generativelanguage.googleapis.com"
@@ -47,5 +52,14 @@ const (
 	SessionTTL = 30 * time.Minute
 
 	// GeminiCLIUserAgent mimics Gemini CLI to maximize compatibility with internal endpoints.
-	GeminiCLIUserAgent = "GeminiCLI/0.1.5 (Windows; AMD64)"
+	// Note: The real Gemini CLI uses OS-appropriate platform strings.
+	// Use GetGeminiCLIUserAgent() for runtime-aware User-Agent.
+	GeminiCLIUserAgent = "GeminiCLI/0.1.5"
 )
+
+// GetGeminiCLIUserAgent 返回带有正确平台信息的 Gemini CLI User-Agent
+func GetGeminiCLIUserAgent() string {
+	osName := strings.Title(runtime.GOOS) // Darwin, Linux, Windows
+	arch := strings.ToUpper(runtime.GOARCH)
+	return fmt.Sprintf("GeminiCLI/0.1.5 (%s; %s)", osName, arch)
+}
diff --git a/backend/internal/repository/claude_oauth_service.go b/backend/internal/repository/claude_oauth_service.go
index b754bd55..7c7274e7 100644
--- a/backend/internal/repository/claude_oauth_service.go
+++ b/backend/internal/repository/claude_oauth_service.go
@@ -212,7 +212,7 @@ func (s *claudeOAuthService) ExchangeCodeForToken(ctx context.Context, code, cod
 		SetContext(ctx).
 		SetHeader("Accept", "application/json, text/plain, */*").
 		SetHeader("Content-Type", "application/json").
-		SetHeader("User-Agent", "axios/1.8.4").
+		SetHeader("User-Agent", "axios/1.13.6").
 		SetBody(reqBody).
 		SetSuccessResult(&tokenResp).
 		Post(s.tokenURL)
@@ -242,6 +242,7 @@ func (s *claudeOAuthService) RefreshToken(ctx context.Context, refreshToken, pro
 		"grant_type":    "refresh_token",
 		"refresh_token": refreshToken,
 		"client_id":     oauth.ClientID,
+		"scope":         oauth.ScopeAPI,
 	}
 
 	var tokenResp oauth.TokenResponse
@@ -250,7 +251,7 @@ func (s *claudeOAuthService) RefreshToken(ctx context.Context, refreshToken, pro
 		SetContext(ctx).
 		SetHeader("Accept", "application/json, text/plain, */*").
 		SetHeader("Content-Type", "application/json").
-		SetHeader("User-Agent", "axios/1.8.4").
+		SetHeader("User-Agent", "axios/1.13.6").
 		SetBody(reqBody).
 		SetSuccessResult(&tokenResp).
 		Post(s.tokenURL)
@@ -268,9 +269,9 @@ func (s *claudeOAuthService) RefreshToken(ctx context.Context, refreshToken, pro
 
 func createReqClient(proxyURL string) (*req.Client, error) {
 	// 禁用 CookieJar，确保每次授权都是干净的会话
+	// 不使用 ImpersonateChrome() — 真实 Claude CLI 用 axios (Bun fetch)，TLS 指纹应为 Node.js/Bun
 	client := req.C().
-		SetTimeout(60 * time.Second).
-		ImpersonateChrome().
+		SetTimeout(15 * time.Second).
 		SetCookieJar(nil) // 禁用 CookieJar
 
 	trimmed, _, err := proxyurl.Parse(proxyURL)
diff --git a/backend/internal/repository/http_upstream.go b/backend/internal/repository/http_upstream.go
index 7c79f128..3602b83b 100644
--- a/backend/internal/repository/http_upstream.go
+++ b/backend/internal/repository/http_upstream.go
@@ -124,13 +124,12 @@ func NewHTTPUpstream(cfg *config.Config) service.HTTPUpstream {
 //   - 调用方必须关闭 resp.Body，否则会导致 inFlight 计数泄漏
 //   - inFlight > 0 的客户端不会被淘汰，确保活跃请求不被中断
 func (s *httpUpstreamService) Do(req *http.Request, proxyURL string, accountID int64, accountConcurrency int) (*http.Response, error) {
-	// Node.js TLS 代理：Anthropic + Google APIs
-	// 无论是否绑定 per-account 代理，都走 node-tls-proxy（指纹伪装）
+	// Node.js TLS 代理：仅 Anthropic API
+	// Antigravity (googleapis) 使用 Go 原生 TLS（更接近真实 BoringCrypto 指纹）
 	// proxyURL 通过 X-Upstream-Proxy header 传递给 node-tls-proxy 动态选择出口
 	if s.isNodeTLSProxyEnabled() && req != nil && req.URL != nil && req.URL.Scheme == "https" {
 		host := req.URL.Hostname()
-		if host == "api.anthropic.com" ||
-			strings.HasSuffix(host, ".googleapis.com") {
+		if host == "api.anthropic.com" {
 			return s.doViaNodeTLSProxy(req, proxyURL, accountID, accountConcurrency)
 		}
 	}
@@ -186,11 +185,11 @@ func (s *httpUpstreamService) DoWithTLS(req *http.Request, proxyURL string, acco
 		return s.Do(req, proxyURL, accountID, accountConcurrency)
 	}
 
-	// 优先使用 Node.js TLS 代理模式（Anthropic + Google APIs）
-	// 无论是否绑定 per-account 代理，都走 node-tls-proxy（指纹伪装）
+	// 优先使用 Node.js TLS 代理模式（仅 Anthropic API）
+	// Antigravity (googleapis) 使用 Go 原生 TLS（更接近真实 BoringCrypto 指纹）
 	if s.isNodeTLSProxyEnabled() && req != nil && req.URL != nil {
 		host := req.URL.Hostname()
-		if host == "api.anthropic.com" || strings.HasSuffix(host, ".googleapis.com") {
+		if host == "api.anthropic.com" {
 			return s.doViaNodeTLSProxy(req, proxyURL, accountID, accountConcurrency)
 		}
 	}
diff --git a/backend/internal/service/antigravity_heartbeat.go b/backend/internal/service/antigravity_heartbeat.go
new file mode 100644
index 00000000..396922b9
--- /dev/null
+++ b/backend/internal/service/antigravity_heartbeat.go
@@ -0,0 +1,204 @@
+package service
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"math/rand"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/pkg/antigravity"
+)
+
+// AntigravityHeartbeat 模拟真实 Antigravity IDE 的心跳行为
+// 真实 IDE 每 5 分钟发送 loadCodeAssist + fetchAvailableModels
+type AntigravityHeartbeat struct {
+	mu       sync.Mutex
+	sessions map[int64]*heartbeatSession // accountID -> session
+	stopCh   chan struct{}
+}
+
+type heartbeatSession struct {
+	accountID   int64
+	accessToken string
+	projectID   string
+	proxyURL    string
+	lastBeat    time.Time
+}
+
+// NewAntigravityHeartbeat 创建心跳管理器
+func NewAntigravityHeartbeat() *AntigravityHeartbeat {
+	hb := &AntigravityHeartbeat{
+		sessions: make(map[int64]*heartbeatSession),
+		stopCh:   make(chan struct{}),
+	}
+	go hb.loop()
+	return hb
+}
+
+// Register 注册账号心跳（首次 API 调用时调用）
+func (h *AntigravityHeartbeat) Register(accountID int64, accessToken, projectID, proxyURL string) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+
+	if _, exists := h.sessions[accountID]; exists {
+		// 更新 token（可能已刷新）
+		h.sessions[accountID].accessToken = accessToken
+		return
+	}
+
+	h.sessions[accountID] = &heartbeatSession{
+		accountID:   accountID,
+		accessToken: accessToken,
+		projectID:   projectID,
+		proxyURL:    proxyURL,
+		lastBeat:    time.Now(),
+	}
+	log.Printf("[antigravity-heartbeat] registered account %d (project: %s)", accountID, projectID)
+}
+
+// UpdateToken 更新账号的 access token（token 刷新后调用）
+func (h *AntigravityHeartbeat) UpdateToken(accountID int64, accessToken string) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	if s, ok := h.sessions[accountID]; ok {
+		s.accessToken = accessToken
+	}
+}
+
+// Unregister 移除账号心跳
+func (h *AntigravityHeartbeat) Unregister(accountID int64) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	delete(h.sessions, accountID)
+}
+
+// Stop 停止心跳
+func (h *AntigravityHeartbeat) Stop() {
+	select {
+	case <-h.stopCh:
+	default:
+		close(h.stopCh)
+	}
+}
+
+func (h *AntigravityHeartbeat) loop() {
+	ticker := time.NewTicker(1 * time.Minute)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-h.stopCh:
+			return
+		case <-ticker.C:
+			h.tick()
+		}
+	}
+}
+
+func (h *AntigravityHeartbeat) tick() {
+	h.mu.Lock()
+	// 收集需要心跳的 session
+	var toSend []*heartbeatSession
+	now := time.Now()
+	for _, s := range h.sessions {
+		if now.Sub(s.lastBeat) >= 5*time.Minute {
+			s.lastBeat = now
+			// 复制一份避免持锁时发请求
+			cp := *s
+			toSend = append(toSend, &cp)
+		}
+	}
+	h.mu.Unlock()
+
+	for _, s := range toSend {
+		go h.sendHeartbeat(s)
+	}
+}
+
+func (h *AntigravityHeartbeat) sendHeartbeat(s *heartbeatSession) {
+	client, err := antigravity.NewClient(s.proxyURL)
+	if err != nil {
+		log.Printf("[antigravity-heartbeat] account %d: client error: %v", s.accountID, err)
+		return
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer cancel()
+
+	// 1. loadCodeAssist
+	h.doLoadCodeAssist(ctx, client, s)
+
+	// 模拟真实 IDE 的延迟（~500ms）
+	time.Sleep(time.Duration(400+rand.Intn(200)) * time.Millisecond)
+
+	// 2. fetchAvailableModels
+	h.doFetchAvailableModels(ctx, client, s)
+}
+
+func (h *AntigravityHeartbeat) doLoadCodeAssist(ctx context.Context, client *antigravity.Client, s *heartbeatSession) {
+	reqBody := map[string]any{
+		"metadata": map[string]string{
+			"ideType": "ANTIGRAVITY",
+		},
+	}
+	body, _ := json.Marshal(reqBody)
+
+	for _, baseURL := range antigravity.BaseURLs {
+		apiURL := fmt.Sprintf("%s/v1internal:loadCodeAssist", baseURL)
+		req, err := http.NewRequestWithContext(ctx, http.MethodPost, apiURL, bytes.NewReader(body))
+		if err != nil {
+			continue
+		}
+		req.Header.Set("Content-Type", "application/json")
+		req.Header.Set("Authorization", "Bearer "+s.accessToken)
+		req.Header.Set("User-Agent", antigravity.GetUserAgent())
+		req.Header.Set("X-Goog-Api-Client", antigravity.GetGoogAPIClient())
+
+		resp, err := client.DoRaw(req)
+		if err != nil {
+			continue
+		}
+		io.Copy(io.Discard, resp.Body)
+		resp.Body.Close()
+
+		if resp.StatusCode == http.StatusOK {
+			return
+		}
+	}
+}
+
+func (h *AntigravityHeartbeat) doFetchAvailableModels(ctx context.Context, client *antigravity.Client, s *heartbeatSession) {
+	reqBody := map[string]string{
+		"project": s.projectID,
+	}
+	body, _ := json.Marshal(reqBody)
+
+	for _, baseURL := range antigravity.BaseURLs {
+		apiURL := fmt.Sprintf("%s/v1internal:fetchAvailableModels", baseURL)
+		req, err := http.NewRequestWithContext(ctx, http.MethodPost, apiURL, bytes.NewReader(body))
+		if err != nil {
+			continue
+		}
+		req.Header.Set("Content-Type", "application/json")
+		req.Header.Set("Authorization", "Bearer "+s.accessToken)
+		req.Header.Set("User-Agent", antigravity.GetUserAgent())
+		req.Header.Set("X-Goog-Api-Client", antigravity.GetGoogAPIClient())
+
+		resp, err := client.DoRaw(req)
+		if err != nil {
+			continue
+		}
+		io.Copy(io.Discard, resp.Body)
+		resp.Body.Close()
+
+		if resp.StatusCode == http.StatusOK {
+			return
+		}
+	}
+}
diff --git a/backend/internal/service/gemini_messages_compat_service.go b/backend/internal/service/gemini_messages_compat_service.go
index 5b1abc11..f1eac565 100644
--- a/backend/internal/service/gemini_messages_compat_service.go
+++ b/backend/internal/service/gemini_messages_compat_service.go
@@ -670,7 +670,7 @@ func (s *GeminiMessagesCompatService) Forward(ctx context.Context, c *gin.Contex
 				}
 				upstreamReq.Header.Set("Content-Type", "application/json")
 				upstreamReq.Header.Set("Authorization", "Bearer "+accessToken)
-				upstreamReq.Header.Set("User-Agent", geminicli.GeminiCLIUserAgent)
+				upstreamReq.Header.Set("User-Agent", geminicli.GetGeminiCLIUserAgent())
 				return upstreamReq, "x-request-id", nil
 			} else {
 				// Mode 2: AI Studio API with OAuth (like API key mode, but using Bearer token)
@@ -691,6 +691,7 @@ func (s *GeminiMessagesCompatService) Forward(ctx context.Context, c *gin.Contex
 				}
 				upstreamReq.Header.Set("Content-Type", "application/json")
 				upstreamReq.Header.Set("Authorization", "Bearer "+accessToken)
+				upstreamReq.Header.Set("User-Agent", geminicli.GetGeminiCLIUserAgent())
 				return upstreamReq, "x-request-id", nil
 			}
 		}
@@ -722,7 +723,7 @@ func (s *GeminiMessagesCompatService) Forward(ctx context.Context, c *gin.Contex
 			c.Set(OpsUpstreamRequestBodyKey, string(body))
 		}
 
-		resp, err = s.httpUpstream.Do(upstreamReq, proxyURL, account.ID, account.Concurrency)
+		resp, err = s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
 		if err != nil {
 			safeErr := sanitizeUpstreamErrorMessage(err.Error())
 			appendOpsUpstreamError(c, OpsUpstreamErrorEvent{
@@ -1171,7 +1172,7 @@ func (s *GeminiMessagesCompatService) ForwardNative(ctx context.Context, c *gin.
 				}
 				upstreamReq.Header.Set("Content-Type", "application/json")
 				upstreamReq.Header.Set("Authorization", "Bearer "+accessToken)
-				upstreamReq.Header.Set("User-Agent", geminicli.GeminiCLIUserAgent)
+				upstreamReq.Header.Set("User-Agent", geminicli.GetGeminiCLIUserAgent())
 				return upstreamReq, "x-request-id", nil
 			} else {
 				// Mode 2: AI Studio API with OAuth (like API key mode, but using Bearer token)
@@ -1192,6 +1193,7 @@ func (s *GeminiMessagesCompatService) ForwardNative(ctx context.Context, c *gin.
 				}
 				upstreamReq.Header.Set("Content-Type", "application/json")
 				upstreamReq.Header.Set("Authorization", "Bearer "+accessToken)
+				upstreamReq.Header.Set("User-Agent", geminicli.GetGeminiCLIUserAgent())
 				return upstreamReq, "x-request-id", nil
 			}
 		}
@@ -1222,7 +1224,7 @@ func (s *GeminiMessagesCompatService) ForwardNative(ctx context.Context, c *gin.
 			c.Set(OpsUpstreamRequestBodyKey, string(body))
 		}
 
-		resp, err = s.httpUpstream.Do(upstreamReq, proxyURL, account.ID, account.Concurrency)
+		resp, err = s.httpUpstream.DoWithTLS(upstreamReq, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
 		if err != nil {
 			safeErr := sanitizeUpstreamErrorMessage(err.Error())
 			appendOpsUpstreamError(c, OpsUpstreamErrorEvent{
@@ -2589,7 +2591,7 @@ func (s *GeminiMessagesCompatService) ForwardAIStudioGET(ctx context.Context, ac
 		return nil, fmt.Errorf("unsupported account type: %s", account.Type)
 	}
 
-	resp, err := s.httpUpstream.Do(req, proxyURL, account.ID, account.Concurrency)
+	resp, err := s.httpUpstream.DoWithTLS(req, proxyURL, account.ID, account.Concurrency, account.IsTLSFingerprintEnabled())
 	if err != nil {
 		return nil, err
 	}
diff --git a/backend/internal/service/identity_service.go b/backend/internal/service/identity_service.go
index 33c60c4b..ba22e1ca 100644
--- a/backend/internal/service/identity_service.go
+++ b/backend/internal/service/identity_service.go
@@ -26,13 +26,13 @@ var (
 
 // 默认指纹值（当客户端未提供时使用）
 var defaultFingerprint = Fingerprint{
-	UserAgent:               "claude-cli/2.1.81 (external, cli)",
+	UserAgent:               "claude-cli/2.1.84 (external, cli)",
 	StainlessLang:           "js",
-	StainlessPackageVersion: "0.80.0",
-	StainlessOS:             "Linux",
+	StainlessPackageVersion: "0.74.0",
+	StainlessOS:             "MacOS",
 	StainlessArch:           "arm64",
 	StainlessRuntime:        "node",
-	StainlessRuntimeVersion: "v24.13.0",
+	StainlessRuntimeVersion: "v24.3.0",
 }
 
 
diff --git a/deploy/config.example.yaml b/deploy/config.example.yaml
index 63df74a1..7a080ab0 100644
--- a/deploy/config.example.yaml
+++ b/deploy/config.example.yaml
@@ -409,10 +409,10 @@ gateway:
   # other sub2api deployments. Empty values use built-in defaults.
   # 每个实例可设置不同的版本号，与其他 sub2api 部署区分。空值使用内置默认值。
   fingerprint_defaults:
-    # claude_cli_version: "2.1.81"
-    # stainless_package_version: "0.80.0"
-    # stainless_runtime_version: "v24.13.0"
-    # stainless_os: "Linux"           # Linux / Darwin
+    # claude_cli_version: "2.1.84"
+    # stainless_package_version: "0.74.0"
+    # stainless_runtime_version: "v24.3.0"
+    # stainless_os: "MacOS"            # MacOS / Linux (注意大小写，真实CLI用MacOS)
     # stainless_arch: "arm64"         # arm64 / x64
 
 # =============================================================================