Merge pull request #4359 from catoncat/agent/fix-agent-identity-import-expiry

fix(openai): make Agent Identity usable end to end

backend/internal/handler/admin/account_codex_agent_identity_import_test.go

@@ -1,6 +1,7 @@
 package admin
 
 import (
+	"context"
 	"crypto/ed25519"
 	"crypto/rand"
 	"crypto/x509"
@@ -45,3 +46,38 @@ func TestNormalizeCodexImportEntryAcceptsAgentIdentityAuthJSON(t *testing.T) {
 	require.NotContains(t, item.Credentials, "refresh_token")
 	require.NotEmpty(t, item.WarningTexts)
 }
+
+func TestImportCodexSessionsCreatesAgentIdentityWithoutOAuthExpiry(t *testing.T) {
+	_, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	der, err := x509.MarshalPKCS8PrivateKey(privateKey)
+	require.NoError(t, err)
+
+	svc := newCodexImportMemoryAdminService(nil)
+	handler := NewAccountHandler(svc, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil)
+	result, err := handler.importCodexSessions(context.Background(), CodexSessionImportRequest{
+		SkipDefaultGroupBind: boolPtr(true),
+	}, []codexImportEntry{{
+		Index: 1,
+		Value: map[string]any{
+			"auth_mode": "agentIdentity",
+			"agent_identity": map[string]any{
+				"agent_runtime_id":  "runtime-import",
+				"agent_private_key": base64.StdEncoding.EncodeToString(der),
+				"task_id":           "task-import",
+				"account_id":        "account-import",
+				"chatgpt_user_id":   "user-import",
+			},
+		},
+	}})
+	require.NoError(t, err)
+	require.Equal(t, 1, result.Created)
+	require.Zero(t, result.Failed)
+	require.Len(t, svc.createdAccounts, 1)
+	created := svc.createdAccounts[0]
+	require.Nil(t, created.ExpiresAt)
+	require.Nil(t, created.AutoPauseOnExpired)
+	require.Equal(t, service.OpenAIAuthModeAgentIdentity, created.Credentials["auth_mode"])
+	require.NotContains(t, created.Credentials, "access_token")
+	require.NotContains(t, created.Credentials, "refresh_token")
+}

backend/internal/handler/admin/account_codex_import.go

@@ -774,6 +774,12 @@ func resolveCodexImportExpiry(req CodexSessionImportRequest, item *codexImportAc
 	if item == nil {
 		return nil, nil, nil, nil, errors.New("导入项为空")
 	}
+	// Agent Identity has no OAuth access-token lifetime. Its runtime/task
+	// lifecycle is handled by the upstream task recovery path, so it must not
+	// be rejected or auto-paused by the OAuth import expiry policy.
+	if item.IsAgentIdentity {
+		return nil, nil, nil, nil, nil
+	}
 
 	var requestExpiresAt *time.Time
 	if req.ExpiresAt != nil && *req.ExpiresAt > 0 {

backend/internal/service/openai_codex_models_service.go

@@ -42,8 +42,10 @@ type CodexModelsManifest struct {
 }
 
 type codexModelsManifestUpstreamError struct {
-	err       error
-	retryable bool
+	err        error
+	retryable  bool
+	statusCode int
+	body       []byte
 }
 
 func (e *codexModelsManifestUpstreamError) Error() string { return e.err.Error() }
@@ -135,6 +137,7 @@ type codexModelsManifestRequest struct {
 	proxyURL            string
 	accountID           int64
 	credentialAccountID int64
+	credentialAccount   *Account
 	accountConcurrency  int
 	useAPIKeyUpstream   bool
 }
@@ -308,15 +311,42 @@ func (s *OpenAIGatewayService) FetchCodexModelsManifest(ctx context.Context, acc
 		proxyURL:            proxyURL,
 		accountID:           account.ID,
 		credentialAccountID: credAccount.ID,
+		credentialAccount:   credAccount,
 		accountConcurrency:  account.Concurrency,
 		useAPIKeyUpstream:   useAPIKeyUpstream,
 	}
 	if useAPIKeyUpstream {
 		return s.fetchCachedAPIKeyCodexModelsManifest(ctx, request, ifNoneMatch)
 	}
+	manifest, fetchErr := s.fetchCodexModelsManifestUpstream(ctx, request, ifNoneMatch)
+	if !credAccount.IsOpenAIAgentIdentity() || !isAgentIdentityTaskInvalidCodexModelsError(fetchErr) {
+		return manifest, fetchErr
+	}
+	expectedTaskID := strings.TrimSpace(credAccount.GetCredential("task_id"))
+	if recoverErr := s.recoverAgentIdentityTask(ctx, credAccount, expectedTaskID); recoverErr != nil {
+		return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_CODEX_MODELS_AUTH_FAILED", "agent identity task recovery failed: %v", recoverErr)
+	}
+	authHeaders, authErr := s.buildOpenAIAuthenticationHeaders(ctx, credAccount, "")
+	if authErr != nil {
+		return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_CODEX_MODELS_AUTH_FAILED", "build Codex models authentication after task recovery: %v", authErr)
+	}
+	request.headers.Del("Authorization")
+	request.headers.Del("ChatGPT-Account-ID")
+	for key, values := range authHeaders {
+		for _, value := range values {
+			request.headers.Add(key, value)
+		}
+	}
+	setOpenAIChatGPTAccountHeaders(request.headers, credAccount)
 	return s.fetchCodexModelsManifestUpstream(ctx, request, ifNoneMatch)
 }
 
+func isAgentIdentityTaskInvalidCodexModelsError(err error) bool {
+	var upstreamErr *codexModelsManifestUpstreamError
+	return errors.As(err, &upstreamErr) &&
+		isAgentIdentityTaskInvalidHTTPResponse(upstreamErr.statusCode, upstreamErr.body)
+}
+
 func (s *OpenAIGatewayService) fetchCachedAPIKeyCodexModelsManifest(ctx context.Context, request codexModelsManifestRequest, ifNoneMatch string) (*CodexModelsManifest, error) {
 	if err := ctx.Err(); err != nil {
 		return nil, err
@@ -410,12 +440,15 @@ func (s *OpenAIGatewayService) fetchCodexModelsManifestUpstream(ctx context.Cont
 	}
 	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
 		body, _ := io.ReadAll(io.LimitReader(resp.Body, 2048))
+		body = s.redactAgentIdentitySensitiveBody(reqCtx, request.credentialAccount, body)
 		message := strings.TrimSpace(string(body))
 		if message == "" {
 			message = resp.Status
 		}
 		return nil, &codexModelsManifestUpstreamError{
-			err: infraerrors.Newf(http.StatusBadGateway, "OPENAI_CODEX_MODELS_UPSTREAM_FAILED", "codex models manifest upstream error %d: %s", resp.StatusCode, message),
+			err:        infraerrors.Newf(http.StatusBadGateway, "OPENAI_CODEX_MODELS_UPSTREAM_FAILED", "codex models manifest upstream error %d: %s", resp.StatusCode, message),
+			statusCode: resp.StatusCode,
+			body:       body,
 			retryable: resp.StatusCode == http.StatusTooManyRequests ||
 				(resp.StatusCode >= http.StatusInternalServerError && resp.StatusCode < 600),
 		}

backend/internal/service/openai_codex_models_service_test.go

@@ -3,6 +3,7 @@ package service
 import (
 	"context"
 	"errors"
+	"fmt"
 	"io"
 	"net"
 	"net/http"
@@ -17,6 +18,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/internal/config"
 	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/tlsfingerprint"
+	"github.com/stretchr/testify/require"
 	"golang.org/x/net/http2"
 )
 
@@ -242,6 +244,93 @@ func TestFetchCodexModelsManifestAgentIdentityUsesAssertionWithoutOAuthToken(t *
 	}
 }
 
+func TestFetchCodexModelsManifestAgentIdentityRecoversInvalidTaskOnce(t *testing.T) {
+	key, privateKey := newTestAgentIdentityKey(t)
+	account := &Account{
+		ID:       4,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"auth_mode":          OpenAIAuthModeAgentIdentity,
+			"agent_runtime_id":   key.runtimeID,
+			"agent_private_key":  privateKey,
+			"task_id":            "task-models-old",
+			"chatgpt_account_id": "acc-agent-recovery",
+		},
+	}
+	repo := &stubQuotaAccountRepo{accounts: map[int64]*Account{account.ID: account}}
+	modelsCalls := 0
+	registerCalls := 0
+	var assertions []string
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("content-type", "application/json")
+		if strings.Contains(r.URL.Path, "/task/register") {
+			registerCalls++
+			_, _ = w.Write([]byte(`{"task_id":"task-models-new"}`))
+			return
+		}
+		modelsCalls++
+		assertions = append(assertions, r.Header.Get("Authorization"))
+		if modelsCalls == 1 {
+			w.WriteHeader(http.StatusUnauthorized)
+			_, _ = w.Write([]byte(`{"error":{"code":"invalid_task_id"}}`))
+			return
+		}
+		_, _ = w.Write([]byte(`{"models":[]}`))
+	}))
+	defer server.Close()
+
+	originalModelsURL := chatgptCodexModelsURL
+	chatgptCodexModelsURL = server.URL
+	t.Cleanup(func() { chatgptCodexModelsURL = originalModelsURL })
+	originalAuthBase := openAIAgentIdentityAuthAPIBaseURL
+	openAIAgentIdentityAuthAPIBaseURL = server.URL
+	t.Cleanup(func() { openAIAgentIdentityAuthAPIBaseURL = originalAuthBase })
+
+	s := &OpenAIGatewayService{accountRepo: repo}
+	manifest, err := s.FetchCodexModelsManifest(context.Background(), account, "0.137.0", "")
+	require.NoError(t, err)
+	require.Equal(t, `{"models":[]}`, string(manifest.Body))
+	require.Equal(t, 2, modelsCalls)
+	require.Equal(t, 1, registerCalls)
+	require.Len(t, assertions, 2)
+	require.Equal(t, "task-models-old", decodeAgentAssertionTask(t, assertions[0]))
+	require.Equal(t, "task-models-new", decodeAgentAssertionTask(t, assertions[1]))
+}
+
+func TestFetchCodexModelsManifestAgentIdentityRedactsUpstreamErrors(t *testing.T) {
+	key, privateKey := newTestAgentIdentityKey(t)
+	account := &Account{
+		ID:       5,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"auth_mode":          OpenAIAuthModeAgentIdentity,
+			"agent_runtime_id":   key.runtimeID,
+			"agent_private_key":  privateKey,
+			"task_id":            key.taskID,
+			"chatgpt_account_id": "acc-agent-redaction",
+		},
+	}
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		w.WriteHeader(http.StatusBadRequest)
+		_, _ = fmt.Fprintf(w, `{"error":"%s %s %s AgentAssertion leaked"}`, key.runtimeID, key.taskID, privateKey)
+	}))
+	defer server.Close()
+	original := chatgptCodexModelsURL
+	chatgptCodexModelsURL = server.URL
+	t.Cleanup(func() { chatgptCodexModelsURL = original })
+
+	s := &OpenAIGatewayService{}
+	_, err := s.FetchCodexModelsManifest(context.Background(), account, "0.137.0", "")
+	require.Error(t, err)
+	require.NotContains(t, err.Error(), key.runtimeID)
+	require.NotContains(t, err.Error(), key.taskID)
+	require.NotContains(t, err.Error(), privateKey)
+	require.NotContains(t, err.Error(), "AgentAssertion leaked")
+	require.Contains(t, err.Error(), "[redacted]")
+}
+
 func TestFetchCodexModelsManifestDefaultClientVersion(t *testing.T) {
 	var gotClientVersion string
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

backend/internal/service/openai_quota_service.go

@@ -22,8 +22,6 @@ import (
 // errors.Is still matches it by identity since ResetCredit returns this var.
 var ErrSparkShadowResetNotSupported = infraerrors.New(http.StatusConflict, "SPARK_SHADOW_RESET_NOT_SUPPORTED", "spark shadow account does not support credit reset; reset the parent account")
 
-var ErrAgentIdentityResetNotSupported = infraerrors.New(http.StatusConflict, "AGENT_IDENTITY_RESET_NOT_SUPPORTED", "agent identity does not support rate-limit reset credit consumption")
-
 // Endpoints used by the OpenAI/ChatGPT/Codex quota query and reset feature.
 const (
 	chatGPTUsageURL             = "https://chatgpt.com/backend-api/wham/usage"
@@ -160,7 +158,7 @@ func (s *OpenAIQuotaService) QueryUsage(ctx context.Context, accountID int64) (*
 
 	var payload OpenAIQuotaUsage
 	for recovered := false; ; {
-		quotaHeaders, headerErr := s.buildCodexQuotaHeaders(callCtx, accountID, accessToken, chatGPTAccountID, fedRAMP)
+		quotaHeaders, expectedTaskID, headerErr := s.buildCodexQuotaHeaders(callCtx, accountID, accessToken, chatGPTAccountID, fedRAMP)
 		if headerErr != nil {
 			return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_QUOTA_AUTH_FAILED", "failed to build upstream authentication: %v", headerErr)
 		}
@@ -175,7 +173,7 @@ func (s *OpenAIQuotaService) QueryUsage(ctx context.Context, accountID int64) (*
 		if !resp.IsSuccessState() {
 			if agentIdentity && !recovered && isAgentIdentityTaskInvalidHTTPResponse(resp.StatusCode, []byte(resp.String())) {
 				recovered = true
-				if err := s.recoverAgentIdentityTask(ctx, accountID); err != nil {
+				if err := s.recoverAgentIdentityTask(ctx, accountID, expectedTaskID); err != nil {
 					return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_QUOTA_AUTH_FAILED", "agent identity task recovery failed: %v", err)
 				}
 				continue
@@ -209,7 +207,7 @@ func (s *OpenAIQuotaService) QueryUsage(ctx context.Context, accountID int64) (*
 }
 
 func (s *OpenAIQuotaService) queryResetCreditDetails(ctx context.Context, client *req.Client, accessToken, chatGPTAccountID string, fedRAMP bool, accountID int64) *openAIRateLimitResetCreditDetails {
-	quotaHeaders, headerErr := s.buildCodexQuotaHeaders(ctx, accountID, accessToken, chatGPTAccountID, fedRAMP)
+	quotaHeaders, _, headerErr := s.buildCodexQuotaHeaders(ctx, accountID, accessToken, chatGPTAccountID, fedRAMP)
 	if headerErr != nil {
 		slog.Warn("openai_quota_reset_credit_details_auth_failed", "account_id", accountID, "error", headerErr)
 		return nil
@@ -260,9 +258,6 @@ func (s *OpenAIQuotaService) ResetCredit(ctx context.Context, accountID int64) (
 		if acc.IsShadow() {
 			return nil, ErrSparkShadowResetNotSupported
 		}
-		if acc.IsOpenAIAgentIdentity() {
-			return nil, ErrAgentIdentityResetNotSupported
-		}
 	}
 
 	accessToken, chatGPTAccountID, proxyURL, fedRAMP, err := s.prepareUpstreamCall(ctx, accountID)
@@ -282,26 +277,38 @@ func (s *OpenAIQuotaService) ResetCredit(ctx context.Context, accountID int64) (
 
 	callCtx, cancel := context.WithTimeout(ctx, openaiQuotaUpstreamTimeout)
 	defer cancel()
+	agentIdentity := s.isAgentIdentityAccount(ctx, accountID)
+
 	var payload OpenAIQuotaResetResult
-	headers, headerErr := s.buildCodexQuotaHeaders(callCtx, accountID, accessToken, chatGPTAccountID, fedRAMP)
-	if headerErr != nil {
-		return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_QUOTA_AUTH_FAILED", "failed to build upstream authentication: %v", headerErr)
-	}
-	headers["content-type"] = "application/json"
-	resp, err := client.R().
-		SetContext(callCtx).
-		SetHeaders(headers).
-		SetBody(map[string]string{"redeem_request_id": redeemRequestID}).
-		SetSuccessResult(&payload).
-		Post(chatGPTRateLimitResetURL)
-	if err != nil {
-		return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_QUOTA_RESET_REQUEST_FAILED", "upstream request failed: %v", err)
-	}
-	if !resp.IsSuccessState() {
-		status := resp.StatusCode
-		body := truncate(s.redactQuotaErrorBody(callCtx, accountID, resp.String()), 240)
-		slog.Warn("openai_quota_reset_failed", "account_id", accountID, "status", status, "body", body)
-		return nil, infraerrors.Newf(mapUpstreamStatus(status), "OPENAI_QUOTA_RESET_UPSTREAM_ERROR", "upstream returned %d: %s", status, body)
+	for recovered := false; ; {
+		headers, expectedTaskID, headerErr := s.buildCodexQuotaHeaders(callCtx, accountID, accessToken, chatGPTAccountID, fedRAMP)
+		if headerErr != nil {
+			return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_QUOTA_AUTH_FAILED", "failed to build upstream authentication: %v", headerErr)
+		}
+		headers["content-type"] = "application/json"
+		resp, err := client.R().
+			SetContext(callCtx).
+			SetHeaders(headers).
+			SetBody(map[string]string{"redeem_request_id": redeemRequestID}).
+			SetSuccessResult(&payload).
+			Post(chatGPTRateLimitResetURL)
+		if err != nil {
+			return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_QUOTA_RESET_REQUEST_FAILED", "upstream request failed: %v", err)
+		}
+		if !resp.IsSuccessState() {
+			if agentIdentity && !recovered && isAgentIdentityTaskInvalidHTTPResponse(resp.StatusCode, []byte(resp.String())) {
+				recovered = true
+				if err := s.recoverAgentIdentityTask(ctx, accountID, expectedTaskID); err != nil {
+					return nil, infraerrors.Newf(http.StatusBadGateway, "OPENAI_QUOTA_AUTH_FAILED", "agent identity task recovery failed: %v", err)
+				}
+				continue
+			}
+			status := resp.StatusCode
+			body := truncate(s.redactQuotaErrorBody(callCtx, accountID, resp.String()), 240)
+			slog.Warn("openai_quota_reset_failed", "account_id", accountID, "status", status, "body", body)
+			return nil, infraerrors.Newf(mapUpstreamStatus(status), "OPENAI_QUOTA_RESET_UPSTREAM_ERROR", "upstream returned %d: %s", status, body)
+		}
+		break
 	}
 
 	slog.Info("openai_quota_reset_success",
@@ -387,7 +394,7 @@ func (s *OpenAIQuotaService) prepareUpstreamCall(ctx context.Context, accountID
 	return accessToken, chatGPTAccountID, proxyURL, fedRAMP, nil
 }
 
-func (s *OpenAIQuotaService) recoverAgentIdentityTask(ctx context.Context, accountID int64) error {
+func (s *OpenAIQuotaService) recoverAgentIdentityTask(ctx context.Context, accountID int64, expectedTaskID string) error {
 	if s == nil || s.accountRepo == nil {
 		return fmt.Errorf("account repository is unavailable")
 	}
@@ -404,7 +411,7 @@ func (s *OpenAIQuotaService) recoverAgentIdentityTask(ctx context.Context, accou
 	if !account.IsOpenAIAgentIdentity() {
 		return nil
 	}
-	return ensureAgentIdentityTaskForAccount(ctx, s.accountRepo, s.agentIdentityWS, &s.agentIdentityTaskMu, account, account.GetCredential("task_id"))
+	return ensureAgentIdentityTaskForAccount(ctx, s.accountRepo, s.agentIdentityWS, &s.agentIdentityTaskMu, account, expectedTaskID)
 }
 
 func (s *OpenAIQuotaService) isAgentIdentityAccount(ctx context.Context, accountID int64) bool {
@@ -424,41 +431,41 @@ func (s *OpenAIQuotaService) isAgentIdentityAccount(ctx context.Context, account
 	return account.IsOpenAIAgentIdentity()
 }
 
-func (s *OpenAIQuotaService) buildCodexQuotaHeaders(ctx context.Context, accountID int64, accessToken, chatGPTAccountID string, fedRAMP bool) (map[string]string, error) {
+func (s *OpenAIQuotaService) buildCodexQuotaHeaders(ctx context.Context, accountID int64, accessToken, chatGPTAccountID string, fedRAMP bool) (map[string]string, string, error) {
 	headers := buildCodexCommonHeaders(accessToken, chatGPTAccountID, fedRAMP)
 	if s == nil || s.accountRepo == nil {
-		return headers, nil
+		return headers, "", nil
 	}
 	account, err := s.accountRepo.GetByID(ctx, accountID)
 	if err != nil || account == nil {
 		if strings.TrimSpace(accessToken) == "" {
-			return nil, fmt.Errorf("agent identity account credentials are unavailable")
+			return nil, "", fmt.Errorf("agent identity account credentials are unavailable")
 		}
-		return headers, nil
+		return headers, "", nil
 	}
 	if account.IsShadow() {
 		if resolved, resolveErr := resolveCredentialAccount(ctx, s.accountRepo, account); resolveErr == nil && resolved != nil {
 			account = resolved
 		} else if strings.TrimSpace(accessToken) == "" {
-			return nil, fmt.Errorf("agent identity shadow credentials are unavailable")
+			return nil, "", fmt.Errorf("agent identity shadow credentials are unavailable")
 		}
 	}
 	if !account.IsOpenAIAgentIdentity() {
-		return headers, nil
+		return headers, "", nil
 	}
 	if err := ensureAgentIdentityTaskForAccount(ctx, s.accountRepo, s.agentIdentityWS, &s.agentIdentityTaskMu, account, ""); err != nil {
-		return nil, err
+		return nil, "", err
 	}
 	key, err := agentIdentityKeyFromAccount(account)
 	if err != nil {
-		return nil, err
+		return nil, "", err
 	}
 	assertion, err := buildAgentAssertion(key, time.Now())
 	if err != nil {
-		return nil, err
+		return nil, "", err
 	}
 	headers["authorization"] = assertion
-	return headers, nil
+	return headers, key.taskID, nil
 }
 
 func (s *OpenAIQuotaService) redactQuotaErrorBody(ctx context.Context, accountID int64, body string) string {

backend/internal/service/openai_quota_spark_window_test.go

@@ -176,21 +176,120 @@ func TestResetCreditShadowRejected(t *testing.T) {
 		"shadow ResetCredit 应映射为 409 Conflict 而非 500")
 }
 
-func TestResetCreditAgentIdentityRejectedBeforeUpstream(t *testing.T) {
+func TestResetCreditAgentIdentityUsesAssertionAndRecoversInvalidTaskOnce(t *testing.T) {
+	_, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	der, err := x509.MarshalPKCS8PrivateKey(privateKey)
+	require.NoError(t, err)
 	account := &Account{
 		ID:       201,
 		Platform: PlatformOpenAI,
 		Type:     AccountTypeOAuth,
 		Credentials: map[string]any{
-			"auth_mode": OpenAIAuthModeAgentIdentity,
+			"auth_mode":          OpenAIAuthModeAgentIdentity,
+			"agent_runtime_id":   "runtime-reset-recovery",
+			"agent_private_key":  base64.StdEncoding.EncodeToString(der),
+			"task_id":            "task-reset-old",
+			"chatgpt_account_id": "account-reset-recovery",
 		},
 	}
 	repo := &stubQuotaAccountRepo{accounts: map[int64]*Account{account.ID: account}}
-	svc := &OpenAIQuotaService{accountRepo: repo}
+	resetCalls := 0
+	registerCalls := 0
+	var assertions []string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("content-type", "application/json")
+		if strings.Contains(r.URL.Path, "/task/register") {
+			registerCalls++
+			_, _ = w.Write([]byte(`{"task_id":"task-reset-new"}`))
+			return
+		}
+		resetCalls++
+		assertions = append(assertions, r.Header.Get("authorization"))
+		require.Equal(t, "account-reset-recovery", r.Header.Get("chatgpt-account-id"))
+		if resetCalls == 1 {
+			w.WriteHeader(http.StatusUnauthorized)
+			_, _ = w.Write([]byte(`{"error":{"code":"invalid_task_id"}}`))
+			return
+		}
+		_, _ = w.Write([]byte(`{"code":"ok","windows_reset":2}`))
+	}))
+	defer srv.Close()
+	oldBase := openAIAgentIdentityAuthAPIBaseURL
+	openAIAgentIdentityAuthAPIBaseURL = srv.URL
+	t.Cleanup(func() { openAIAgentIdentityAuthAPIBaseURL = oldBase })
 
-	_, err := svc.ResetCredit(context.Background(), account.ID)
-	require.ErrorIs(t, err, ErrAgentIdentityResetNotSupported)
-	require.Equal(t, http.StatusConflict, infraerrors.Code(err))
+	invalidator := &agentIdentityWSInvalidationRecorder{}
+	svc := NewOpenAIQuotaService(repo, nil, nil, newQuotaRedirectingFactory(srv))
+	svc.agentIdentityWS = invalidator
+
+	result, err := svc.ResetCredit(context.Background(), account.ID)
+	require.NoError(t, err)
+	require.Equal(t, "ok", result.Code)
+	require.Equal(t, 2, result.WindowsReset)
+	require.Equal(t, 2, resetCalls)
+	require.Equal(t, 1, registerCalls)
+	require.Len(t, assertions, 2)
+	require.True(t, strings.HasPrefix(assertions[0], "AgentAssertion "))
+	require.True(t, strings.HasPrefix(assertions[1], "AgentAssertion "))
+	require.NotEqual(t, assertions[0], assertions[1])
+	require.Equal(t, "task-reset-new", account.GetCredential("task_id"))
+	require.Equal(t, []int64{account.ID}, invalidator.accountIDs)
+}
+
+func TestResetCreditAgentIdentityReusesConcurrentlyRecoveredTask(t *testing.T) {
+	_, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	require.NoError(t, err)
+	der, err := x509.MarshalPKCS8PrivateKey(privateKey)
+	require.NoError(t, err)
+	account := &Account{
+		ID:       202,
+		Platform: PlatformOpenAI,
+		Type:     AccountTypeOAuth,
+		Credentials: map[string]any{
+			"auth_mode":          OpenAIAuthModeAgentIdentity,
+			"agent_runtime_id":   "runtime-reset-concurrent",
+			"agent_private_key":  base64.StdEncoding.EncodeToString(der),
+			"task_id":            "task-reset-old",
+			"chatgpt_account_id": "account-reset-concurrent",
+		},
+	}
+	repo := &stubQuotaAccountRepo{accounts: map[int64]*Account{account.ID: account}}
+	resetCalls := 0
+	registerCalls := 0
+	var assertions []string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("content-type", "application/json")
+		if strings.Contains(r.URL.Path, "/task/register") {
+			registerCalls++
+			_, _ = w.Write([]byte(`{"task_id":"task-reset-unexpected"}`))
+			return
+		}
+		resetCalls++
+		assertions = append(assertions, r.Header.Get("authorization"))
+		if resetCalls == 1 {
+			credentials := shallowCopyMap(account.Credentials)
+			credentials["task_id"] = "task-reset-concurrent"
+			account.Credentials = credentials
+			w.WriteHeader(http.StatusUnauthorized)
+			_, _ = w.Write([]byte(`{"error":{"code":"invalid_task_id"}}`))
+			return
+		}
+		_, _ = w.Write([]byte(`{"code":"ok","windows_reset":1}`))
+	}))
+	defer srv.Close()
+	oldBase := openAIAgentIdentityAuthAPIBaseURL
+	openAIAgentIdentityAuthAPIBaseURL = srv.URL
+	t.Cleanup(func() { openAIAgentIdentityAuthAPIBaseURL = oldBase })
+
+	svc := NewOpenAIQuotaService(repo, nil, nil, newQuotaRedirectingFactory(srv))
+	result, err := svc.ResetCredit(context.Background(), account.ID)
+	require.NoError(t, err)
+	require.Equal(t, "ok", result.Code)
+	require.Equal(t, 2, resetCalls)
+	require.Zero(t, registerCalls)
+	require.Equal(t, "task-reset-old", decodeAgentAssertionTask(t, assertions[0]))
+	require.Equal(t, "task-reset-concurrent", decodeAgentAssertionTask(t, assertions[1]))
 }
 
 // ── Part B: prepareUpstreamCall 影子 resolve ──────────────────────────────