fix: 修复 OpenAI WS 限流状态与调度同步

backend/internal/service/openai_gateway_service.go

@@ -3899,6 +3899,30 @@ func buildCodexUsageExtraUpdates(snapshot *OpenAICodexUsageSnapshot, fallbackNow
 	return updates
 }
 
+func codexUsagePercentExhausted(value *float64) bool {
+	return value != nil && *value >= 100-1e-9
+}
+
+func codexRateLimitResetAtFromSnapshot(snapshot *OpenAICodexUsageSnapshot, fallbackNow time.Time) *time.Time {
+	if snapshot == nil {
+		return nil
+	}
+	normalized := snapshot.Normalize()
+	if normalized == nil {
+		return nil
+	}
+	baseTime := codexSnapshotBaseTime(snapshot, fallbackNow)
+	if codexUsagePercentExhausted(normalized.Used7dPercent) && normalized.Reset7dSeconds != nil {
+		resetAt := baseTime.Add(time.Duration(*normalized.Reset7dSeconds) * time.Second)
+		return &resetAt
+	}
+	if codexUsagePercentExhausted(normalized.Used5hPercent) && normalized.Reset5hSeconds != nil {
+		resetAt := baseTime.Add(time.Duration(*normalized.Reset5hSeconds) * time.Second)
+		return &resetAt
+	}
+	return nil
+}
+
 // updateCodexUsageSnapshot saves the Codex usage snapshot to account's Extra field
 func (s *OpenAIGatewayService) updateCodexUsageSnapshot(ctx context.Context, accountID int64, snapshot *OpenAICodexUsageSnapshot) {
 	if snapshot == nil {
@@ -3908,16 +3932,22 @@ func (s *OpenAIGatewayService) updateCodexUsageSnapshot(ctx context.Context, acc
 		return
 	}
 
-	updates := buildCodexUsageExtraUpdates(snapshot, time.Now())
-	if len(updates) == 0 {
+	now := time.Now()
+	updates := buildCodexUsageExtraUpdates(snapshot, now)
+	resetAt := codexRateLimitResetAtFromSnapshot(snapshot, now)
+	if len(updates) == 0 && resetAt == nil {
 		return
 	}
 
-	// Update account's Extra field asynchronously
 	go func() {
 		updateCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 		defer cancel()
+		if len(updates) > 0 {
 			_ = s.accountRepo.UpdateExtra(updateCtx, accountID, updates)
+		}
+		if resetAt != nil {
+			_ = s.accountRepo.SetRateLimited(updateCtx, accountID, *resetAt)
+		}
 	}()
 }
 

backend/internal/service/openai_ws_forwarder.go

@@ -1853,6 +1853,10 @@ func (s *OpenAIGatewayService) forwardOpenAIWSV2(
 			wsPath,
 			account.ProxyID != nil && account.Proxy != nil,
 		)
+		var dialErr *openAIWSDialError
+		if errors.As(err, &dialErr) && dialErr != nil && dialErr.StatusCode == http.StatusTooManyRequests {
+			s.persistOpenAIWSRateLimitSignal(ctx, account, dialErr.ResponseHeaders, nil, "rate_limit_exceeded", "rate_limit_error", strings.TrimSpace(err.Error()))
+		}
 		return nil, wrapOpenAIWSFallback(classifyOpenAIWSAcquireError(err), err)
 	}
 	defer lease.Release()
@@ -2136,6 +2140,7 @@ func (s *OpenAIGatewayService) forwardOpenAIWSV2(
 
 		if eventType == "error" {
 			errCodeRaw, errTypeRaw, errMsgRaw := parseOpenAIWSErrorEventFields(message)
+			s.persistOpenAIWSRateLimitSignal(ctx, account, lease.HandshakeHeaders(), message, errCodeRaw, errTypeRaw, errMsgRaw)
 			errMsg := strings.TrimSpace(errMsgRaw)
 			if errMsg == "" {
 				errMsg = "Upstream websocket error"
@@ -2639,6 +2644,10 @@ func (s *OpenAIGatewayService) ProxyResponsesWebSocketFromClient(
 				wsPath,
 				account.ProxyID != nil && account.Proxy != nil,
 			)
+			var dialErr *openAIWSDialError
+			if errors.As(acquireErr, &dialErr) && dialErr != nil && dialErr.StatusCode == http.StatusTooManyRequests {
+				s.persistOpenAIWSRateLimitSignal(ctx, account, dialErr.ResponseHeaders, nil, "rate_limit_exceeded", "rate_limit_error", strings.TrimSpace(acquireErr.Error()))
+			}
 			if errors.Is(acquireErr, errOpenAIWSPreferredConnUnavailable) {
 				return nil, NewOpenAIWSClientCloseError(
 					coderws.StatusPolicyViolation,
@@ -2777,6 +2786,7 @@ func (s *OpenAIGatewayService) ProxyResponsesWebSocketFromClient(
 			}
 			if eventType == "error" {
 				errCodeRaw, errTypeRaw, errMsgRaw := parseOpenAIWSErrorEventFields(upstreamMessage)
+				s.persistOpenAIWSRateLimitSignal(ctx, account, lease.HandshakeHeaders(), upstreamMessage, errCodeRaw, errTypeRaw, errMsgRaw)
 				fallbackReason, _ := classifyOpenAIWSErrorEventFromRaw(errCodeRaw, errTypeRaw, errMsgRaw)
 				errCode, errType, errMessage := summarizeOpenAIWSErrorEventFieldsFromRaw(errCodeRaw, errTypeRaw, errMsgRaw)
 				recoverablePrevNotFound := fallbackReason == openAIWSIngressStagePreviousResponseNotFound &&
@@ -3604,6 +3614,7 @@ func (s *OpenAIGatewayService) performOpenAIWSGeneratePrewarm(
 
 		if eventType == "error" {
 			errCodeRaw, errTypeRaw, errMsgRaw := parseOpenAIWSErrorEventFields(message)
+			s.persistOpenAIWSRateLimitSignal(ctx, account, lease.HandshakeHeaders(), message, errCodeRaw, errTypeRaw, errMsgRaw)
 			errMsg := strings.TrimSpace(errMsgRaw)
 			if errMsg == "" {
 				errMsg = "OpenAI websocket prewarm error"
@@ -3867,6 +3878,36 @@ func classifyOpenAIWSAcquireError(err error) string {
 	return "acquire_conn"
 }
 
+func isOpenAIWSRateLimitError(codeRaw, errTypeRaw, msgRaw string) bool {
+	code := strings.ToLower(strings.TrimSpace(codeRaw))
+	errType := strings.ToLower(strings.TrimSpace(errTypeRaw))
+	msg := strings.ToLower(strings.TrimSpace(msgRaw))
+
+	if strings.Contains(errType, "rate_limit") || strings.Contains(errType, "usage_limit") {
+		return true
+	}
+	if strings.Contains(code, "rate_limit") || strings.Contains(code, "usage_limit") || strings.Contains(code, "insufficient_quota") {
+		return true
+	}
+	if strings.Contains(msg, "usage limit") && strings.Contains(msg, "reached") {
+		return true
+	}
+	if strings.Contains(msg, "rate limit") && (strings.Contains(msg, "reached") || strings.Contains(msg, "exceeded")) {
+		return true
+	}
+	return false
+}
+
+func (s *OpenAIGatewayService) persistOpenAIWSRateLimitSignal(ctx context.Context, account *Account, headers http.Header, responseBody []byte, codeRaw, errTypeRaw, msgRaw string) {
+	if s == nil || s.rateLimitService == nil || account == nil || account.Platform != PlatformOpenAI {
+		return
+	}
+	if !isOpenAIWSRateLimitError(codeRaw, errTypeRaw, msgRaw) {
+		return
+	}
+	s.rateLimitService.HandleUpstreamError(ctx, account, http.StatusTooManyRequests, headers, responseBody)
+}
+
 func classifyOpenAIWSErrorEventFromRaw(codeRaw, errTypeRaw, msgRaw string) (string, bool) {
 	code := strings.ToLower(strings.TrimSpace(codeRaw))
 	errType := strings.ToLower(strings.TrimSpace(errTypeRaw))
@@ -3882,6 +3923,9 @@ func classifyOpenAIWSErrorEventFromRaw(codeRaw, errTypeRaw, msgRaw string) (stri
 	case "previous_response_not_found":
 		return "previous_response_not_found", true
 	}
+	if isOpenAIWSRateLimitError(codeRaw, errTypeRaw, msgRaw) {
+		return "upstream_rate_limited", false
+	}
 	if strings.Contains(msg, "upgrade required") || strings.Contains(msg, "status 426") {
 		return "upgrade_required", true
 	}
@@ -3927,9 +3971,7 @@ func openAIWSErrorHTTPStatusFromRaw(codeRaw, errTypeRaw string) int {
 	case strings.Contains(errType, "permission"),
 		strings.Contains(code, "forbidden"):
 		return http.StatusForbidden
-	case strings.Contains(errType, "rate_limit"),
-		strings.Contains(code, "rate_limit"),
-		strings.Contains(code, "insufficient_quota"):
+	case isOpenAIWSRateLimitError(codeRaw, errTypeRaw, ""):
 		return http.StatusTooManyRequests
 	default:
 		return http.StatusBadGateway

backend/internal/service/openai_ws_ratelimit_signal_test.go

+package service
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+
+	coderws "github.com/coder/websocket"
+	"github.com/gin-gonic/gin"
+	"github.com/gorilla/websocket"
+	"github.com/stretchr/testify/require"
+)
+
+type openAIWSRateLimitSignalRepo struct {
+	stubOpenAIAccountRepo
+	rateLimitCalls []time.Time
+	updateExtra    []map[string]any
+}
+
+type openAICodexSnapshotAsyncRepo struct {
+	stubOpenAIAccountRepo
+	updateExtraCh chan map[string]any
+	rateLimitCh   chan time.Time
+}
+
+func (r *openAIWSRateLimitSignalRepo) SetRateLimited(_ context.Context, _ int64, resetAt time.Time) error {
+	r.rateLimitCalls = append(r.rateLimitCalls, resetAt)
+	return nil
+}
+
+func (r *openAIWSRateLimitSignalRepo) UpdateExtra(_ context.Context, _ int64, updates map[string]any) error {
+	copied := make(map[string]any, len(updates))
+	for k, v := range updates {
+		copied[k] = v
+	}
+	r.updateExtra = append(r.updateExtra, copied)
+	return nil
+}
+
+func (r *openAICodexSnapshotAsyncRepo) SetRateLimited(_ context.Context, _ int64, resetAt time.Time) error {
+	if r.rateLimitCh != nil {
+		r.rateLimitCh <- resetAt
+	}
+	return nil
+}
+
+func (r *openAICodexSnapshotAsyncRepo) UpdateExtra(_ context.Context, _ int64, updates map[string]any) error {
+	if r.updateExtraCh != nil {
+		copied := make(map[string]any, len(updates))
+		for k, v := range updates {
+			copied[k] = v
+		}
+		r.updateExtraCh <- copied
+	}
+	return nil
+}
+
+func TestOpenAIGatewayService_Forward_WSv2ErrorEventUsageLimitPersistsRateLimit(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	resetAt := time.Now().Add(2 * time.Hour).Unix()
+	upgrader := websocket.Upgrader{CheckOrigin: func(r *http.Request) bool { return true }}
+	wsServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		conn, err := upgrader.Upgrade(w, r, nil)
+		if err != nil {
+			t.Errorf("upgrade websocket failed: %v", err)
+			return
+		}
+		defer func() { _ = conn.Close() }()
+
+		var req map[string]any
+		if err := conn.ReadJSON(&req); err != nil {
+			t.Errorf("read ws request failed: %v", err)
+			return
+		}
+		_ = conn.WriteJSON(map[string]any{
+			"type": "error",
+			"error": map[string]any{
+				"code":      "rate_limit_exceeded",
+				"type":      "usage_limit_reached",
+				"message":   "The usage limit has been reached",
+				"resets_at": resetAt,
+			},
+		})
+	}))
+	defer wsServer.Close()
+
+	rec := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(rec)
+	c.Request = httptest.NewRequest(http.MethodPost, "/openai/v1/responses", nil)
+	c.Request.Header.Set("User-Agent", "unit-test-agent/1.0")
+
+	upstream := &httpUpstreamRecorder{
+		resp: &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     http.Header{"Content-Type": []string{"application/json"}},
+			Body:       io.NopCloser(strings.NewReader(`{"id":"resp_http_should_not_run"}`)),
+		},
+	}
+
+	cfg := newOpenAIWSV2TestConfig()
+	cfg.Security.URLAllowlist.Enabled = false
+	cfg.Security.URLAllowlist.AllowInsecureHTTP = true
+
+	account := Account{
+		ID:          501,
+		Name:        "openai-ws-rate-limit-event",
+		Platform:    PlatformOpenAI,
+		Type:        AccountTypeAPIKey,
+		Status:      StatusActive,
+		Schedulable: true,
+		Concurrency: 1,
+		Credentials: map[string]any{
+			"api_key":  "sk-test",
+			"base_url": wsServer.URL,
+		},
+		Extra: map[string]any{
+			"responses_websockets_v2_enabled": true,
+		},
+	}
+	repo := &openAIWSRateLimitSignalRepo{stubOpenAIAccountRepo: stubOpenAIAccountRepo{accounts: []Account{account}}}
+	rateSvc := &RateLimitService{accountRepo: repo}
+	svc := &OpenAIGatewayService{
+		accountRepo:      repo,
+		rateLimitService: rateSvc,
+		httpUpstream:     upstream,
+		cache:            &stubGatewayCache{},
+		cfg:              cfg,
+		openaiWSResolver: NewOpenAIWSProtocolResolver(cfg),
+		toolCorrector:    NewCodexToolCorrector(),
+	}
+
+	body := []byte(`{"model":"gpt-5.1","stream":false,"input":[{"type":"input_text","text":"hello"}]}`)
+	result, err := svc.Forward(context.Background(), c, &account, body)
+	require.Error(t, err)
+	require.Nil(t, result)
+	require.Equal(t, http.StatusTooManyRequests, rec.Code)
+	require.Nil(t, upstream.lastReq, "WS 限流 error event 不应回退到同账号 HTTP")
+	require.Len(t, repo.rateLimitCalls, 1)
+	require.WithinDuration(t, time.Unix(resetAt, 0), repo.rateLimitCalls[0], 2*time.Second)
+}
+
+func TestOpenAIGatewayService_Forward_WSv2Handshake429PersistsRateLimit(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("x-codex-primary-used-percent", "100")
+		w.Header().Set("x-codex-primary-reset-after-seconds", "7200")
+		w.Header().Set("x-codex-primary-window-minutes", "10080")
+		w.Header().Set("x-codex-secondary-used-percent", "3")
+		w.Header().Set("x-codex-secondary-reset-after-seconds", "1800")
+		w.Header().Set("x-codex-secondary-window-minutes", "300")
+		w.WriteHeader(http.StatusTooManyRequests)
+		_, _ = w.Write([]byte(`{"error":{"type":"rate_limit_exceeded","message":"rate limited"}}`))
+	}))
+	defer server.Close()
+
+	rec := httptest.NewRecorder()
+	c, _ := gin.CreateTestContext(rec)
+	c.Request = httptest.NewRequest(http.MethodPost, "/openai/v1/responses", nil)
+	c.Request.Header.Set("User-Agent", "unit-test-agent/1.0")
+
+	upstream := &httpUpstreamRecorder{
+		resp: &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     http.Header{"Content-Type": []string{"application/json"}},
+			Body:       io.NopCloser(strings.NewReader(`{"id":"resp_http_should_not_run"}`)),
+		},
+	}
+
+	cfg := newOpenAIWSV2TestConfig()
+	cfg.Security.URLAllowlist.Enabled = false
+	cfg.Security.URLAllowlist.AllowInsecureHTTP = true
+
+	account := Account{
+		ID:          502,
+		Name:        "openai-ws-rate-limit-handshake",
+		Platform:    PlatformOpenAI,
+		Type:        AccountTypeAPIKey,
+		Status:      StatusActive,
+		Schedulable: true,
+		Concurrency: 1,
+		Credentials: map[string]any{
+			"api_key":  "sk-test",
+			"base_url": server.URL,
+		},
+		Extra: map[string]any{
+			"responses_websockets_v2_enabled": true,
+		},
+	}
+	repo := &openAIWSRateLimitSignalRepo{stubOpenAIAccountRepo: stubOpenAIAccountRepo{accounts: []Account{account}}}
+	rateSvc := &RateLimitService{accountRepo: repo}
+	svc := &OpenAIGatewayService{
+		accountRepo:      repo,
+		rateLimitService: rateSvc,
+		httpUpstream:     upstream,
+		cache:            &stubGatewayCache{},
+		cfg:              cfg,
+		openaiWSResolver: NewOpenAIWSProtocolResolver(cfg),
+		toolCorrector:    NewCodexToolCorrector(),
+	}
+
+	body := []byte(`{"model":"gpt-5.1","stream":false,"input":[{"type":"input_text","text":"hello"}]}`)
+	result, err := svc.Forward(context.Background(), c, &account, body)
+	require.Error(t, err)
+	require.Nil(t, result)
+	require.Equal(t, http.StatusTooManyRequests, rec.Code)
+	require.Nil(t, upstream.lastReq, "WS 握手 429 不应回退到同账号 HTTP")
+	require.Len(t, repo.rateLimitCalls, 1)
+	require.NotEmpty(t, repo.updateExtra, "握手 429 的 x-codex 头应立即落库")
+	require.Contains(t, repo.updateExtra[0], "codex_usage_updated_at")
+}
+
+func TestOpenAIGatewayService_ProxyResponsesWebSocketFromClient_ErrorEventUsageLimitPersistsRateLimit(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	cfg := newOpenAIWSV2TestConfig()
+	cfg.Security.URLAllowlist.Enabled = false
+	cfg.Security.URLAllowlist.AllowInsecureHTTP = true
+	cfg.Gateway.OpenAIWS.MaxConnsPerAccount = 1
+	cfg.Gateway.OpenAIWS.MinIdlePerAccount = 0
+	cfg.Gateway.OpenAIWS.MaxIdlePerAccount = 1
+	cfg.Gateway.OpenAIWS.QueueLimitPerConn = 8
+	cfg.Gateway.OpenAIWS.DialTimeoutSeconds = 3
+	cfg.Gateway.OpenAIWS.ReadTimeoutSeconds = 3
+	cfg.Gateway.OpenAIWS.WriteTimeoutSeconds = 3
+
+	resetAt := time.Now().Add(90 * time.Minute).Unix()
+	captureConn := &openAIWSCaptureConn{
+		events: [][]byte{
+			[]byte(`{"type":"error","error":{"code":"rate_limit_exceeded","type":"usage_limit_reached","message":"The usage limit has been reached","resets_at":PLACEHOLDER}}`),
+		},
+	}
+	captureConn.events[0] = []byte(strings.ReplaceAll(string(captureConn.events[0]), "PLACEHOLDER", strconv.FormatInt(resetAt, 10)))
+	captureDialer := &openAIWSCaptureDialer{conn: captureConn}
+	pool := newOpenAIWSConnPool(cfg)
+	pool.setClientDialerForTest(captureDialer)
+
+	account := Account{
+		ID:          503,
+		Name:        "openai-ingress-rate-limit",
+		Platform:    PlatformOpenAI,
+		Type:        AccountTypeAPIKey,
+		Status:      StatusActive,
+		Schedulable: true,
+		Concurrency: 1,
+		Credentials: map[string]any{
+			"api_key": "sk-test",
+		},
+		Extra: map[string]any{
+			"responses_websockets_v2_enabled": true,
+		},
+	}
+	repo := &openAIWSRateLimitSignalRepo{stubOpenAIAccountRepo: stubOpenAIAccountRepo{accounts: []Account{account}}}
+	rateSvc := &RateLimitService{accountRepo: repo}
+	svc := &OpenAIGatewayService{
+		accountRepo:      repo,
+		rateLimitService: rateSvc,
+		httpUpstream:     &httpUpstreamRecorder{},
+		cache:            &stubGatewayCache{},
+		cfg:              cfg,
+		openaiWSResolver: NewOpenAIWSProtocolResolver(cfg),
+		toolCorrector:    NewCodexToolCorrector(),
+		openaiWSPool:     pool,
+	}
+
+	serverErrCh := make(chan error, 1)
+	wsServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		conn, err := coderws.Accept(w, r, &coderws.AcceptOptions{CompressionMode: coderws.CompressionContextTakeover})
+		if err != nil {
+			serverErrCh <- err
+			return
+		}
+		defer func() { _ = conn.CloseNow() }()
+
+		rec := httptest.NewRecorder()
+		ginCtx, _ := gin.CreateTestContext(rec)
+		req := r.Clone(r.Context())
+		req.Header = req.Header.Clone()
+		req.Header.Set("User-Agent", "unit-test-agent/1.0")
+		ginCtx.Request = req
+
+		readCtx, cancel := context.WithTimeout(r.Context(), 3*time.Second)
+		msgType, firstMessage, readErr := conn.Read(readCtx)
+		cancel()
+		if readErr != nil {
+			serverErrCh <- readErr
+			return
+		}
+		if msgType != coderws.MessageText && msgType != coderws.MessageBinary {
+			serverErrCh <- io.ErrUnexpectedEOF
+			return
+		}
+
+		serverErrCh <- svc.ProxyResponsesWebSocketFromClient(r.Context(), ginCtx, conn, &account, "sk-test", firstMessage, nil)
+	}))
+	defer wsServer.Close()
+
+	dialCtx, cancelDial := context.WithTimeout(context.Background(), 3*time.Second)
+	clientConn, _, err := coderws.Dial(dialCtx, "ws"+strings.TrimPrefix(wsServer.URL, "http"), nil)
+	cancelDial()
+	require.NoError(t, err)
+	defer func() { _ = clientConn.CloseNow() }()
+
+	writeCtx, cancelWrite := context.WithTimeout(context.Background(), 3*time.Second)
+	err = clientConn.Write(writeCtx, coderws.MessageText, []byte(`{"type":"response.create","model":"gpt-5.1","stream":false}`))
+	cancelWrite()
+	require.NoError(t, err)
+
+	select {
+	case serverErr := <-serverErrCh:
+		require.Error(t, serverErr)
+		require.Len(t, repo.rateLimitCalls, 1)
+		require.WithinDuration(t, time.Unix(resetAt, 0), repo.rateLimitCalls[0], 2*time.Second)
+	case <-time.After(5 * time.Second):
+		t.Fatal("等待 ingress websocket 结束超时")
+	}
+}
+
+func TestOpenAIGatewayService_UpdateCodexUsageSnapshot_ExhaustedSnapshotSetsRateLimit(t *testing.T) {
+	repo := &openAICodexSnapshotAsyncRepo{
+		updateExtraCh: make(chan map[string]any, 1),
+		rateLimitCh:   make(chan time.Time, 1),
+	}
+	svc := &OpenAIGatewayService{accountRepo: repo}
+	snapshot := &OpenAICodexUsageSnapshot{
+		PrimaryUsedPercent:         ptrFloat64WS(100),
+		PrimaryResetAfterSeconds:   ptrIntWS(3600),
+		PrimaryWindowMinutes:       ptrIntWS(10080),
+		SecondaryUsedPercent:       ptrFloat64WS(12),
+		SecondaryResetAfterSeconds: ptrIntWS(1200),
+		SecondaryWindowMinutes:     ptrIntWS(300),
+	}
+	before := time.Now()
+	svc.updateCodexUsageSnapshot(context.Background(), 601, snapshot)
+
+	select {
+	case updates := <-repo.updateExtraCh:
+		require.Equal(t, 100.0, updates["codex_7d_used_percent"])
+	case <-time.After(2 * time.Second):
+		t.Fatal("等待 codex 快照落库超时")
+	}
+
+	select {
+	case resetAt := <-repo.rateLimitCh:
+		require.WithinDuration(t, before.Add(time.Hour), resetAt, 2*time.Second)
+	case <-time.After(2 * time.Second):
+		t.Fatal("等待 codex 100% 自动切换限流超时")
+	}
+}
+
+func TestOpenAIGatewayService_UpdateCodexUsageSnapshot_NonExhaustedSnapshotDoesNotSetRateLimit(t *testing.T) {
+	repo := &openAICodexSnapshotAsyncRepo{
+		updateExtraCh: make(chan map[string]any, 1),
+		rateLimitCh:   make(chan time.Time, 1),
+	}
+	svc := &OpenAIGatewayService{accountRepo: repo}
+	snapshot := &OpenAICodexUsageSnapshot{
+		PrimaryUsedPercent:         ptrFloat64WS(94),
+		PrimaryResetAfterSeconds:   ptrIntWS(3600),
+		PrimaryWindowMinutes:       ptrIntWS(10080),
+		SecondaryUsedPercent:       ptrFloat64WS(22),
+		SecondaryResetAfterSeconds: ptrIntWS(1200),
+		SecondaryWindowMinutes:     ptrIntWS(300),
+	}
+	svc.updateCodexUsageSnapshot(context.Background(), 602, snapshot)
+
+	select {
+	case <-repo.updateExtraCh:
+	case <-time.After(2 * time.Second):
+		t.Fatal("等待 codex 快照落库超时")
+	}
+
+	select {
+	case resetAt := <-repo.rateLimitCh:
+		t.Fatalf("unexpected rate limit reset at: %v", resetAt)
+	case <-time.After(200 * time.Millisecond):
+	}
+}
+
+func ptrFloat64WS(v float64) *float64 { return &v }
+func ptrIntWS(v int) *int             { return &v }
+
+func TestOpenAIWSErrorHTTPStatusFromRaw_UsageLimitReachedIs429(t *testing.T) {
+	require.Equal(t, http.StatusTooManyRequests, openAIWSErrorHTTPStatusFromRaw("", "usage_limit_reached"))
+	require.Equal(t, http.StatusTooManyRequests, openAIWSErrorHTTPStatusFromRaw("rate_limit_exceeded", ""))
+}