fix(codex): sync routed capabilities from upstream

Account model mappings decide availability, but generated Codex catalogs previously inferred capabilities from local model-name tables. Compatible upstreams can expose unknown models such as OpenCode x-preview-f-free, so reasoning levels, image input, and context limits were missing or wrong.

Sync capability metadata from the account model endpoint, enrich incomplete lists from the Models.dev provider matching the account base URL, and persist only complete snapshots. Mixed groups consume the safe intersection across schedulable accounts. When IDs sync without complete metadata, return an explicit warning and preserve the previous snapshot.

Third-party Responses providers often omit /models. If that endpoint returns 404 or 405 and the account already has concrete model mappings, use those configured upstream IDs for capability enrichment. Authentication, rate-limit, server, and network failures remain hard errors, and metadata is never guessed across providers by model name alone.

Advertise a single none choice for non-reasoning models so current Codex can select them, then omit that catalog placeholder when forwarding to compatible Responses upstreams while preserving official OpenAI request semantics.

backend/internal/handler/admin/account_handler.go

@@ -2774,13 +2774,15 @@ func (h *AccountHandler) SyncUpstreamModels(c *gin.Context) {
 		return
 	}
 
-	models, err := h.accountTestService.FetchUpstreamSupportedModels(c.Request.Context(), account)
+	catalog, err := h.accountTestService.SyncUpstreamModelCatalog(c.Request.Context(), account)
 	if err != nil {
 		var syncErr *service.UpstreamModelSyncError
 		if errors.As(err, &syncErr) {
 			switch syncErr.Kind {
 			case service.UpstreamModelSyncErrorConfiguration, service.UpstreamModelSyncErrorUnsupported:
 				response.BadRequest(c, syncErr.SafeMessage())
+			case service.UpstreamModelSyncErrorInternal:
+				response.InternalError(c, syncErr.SafeMessage())
 			default:
 				slog.Warn("sync_upstream_models_failed", "account_id", accountID, "kind", syncErr.Kind)
 				response.Error(c, http.StatusBadGateway, syncErr.SafeMessage())
@@ -2793,7 +2795,7 @@ func (h *AccountHandler) SyncUpstreamModels(c *gin.Context) {
 		return
 	}
 
-	response.Success(c, gin.H{"models": models})
+	response.Success(c, catalog)
 }
 
 // SyncUpstreamModelsPreview handles syncing live supported models using provided credentials (no account ID needed).
@@ -2824,13 +2826,15 @@ func (h *AccountHandler) SyncUpstreamModelsPreview(c *gin.Context) {
 		return
 	}
 
-	models, err := h.accountTestService.FetchUpstreamSupportedModels(c.Request.Context(), tempAccount)
+	catalog, err := h.accountTestService.SyncUpstreamModelCatalog(c.Request.Context(), tempAccount)
 	if err != nil {
 		var syncErr *service.UpstreamModelSyncError
 		if errors.As(err, &syncErr) {
 			switch syncErr.Kind {
 			case service.UpstreamModelSyncErrorConfiguration, service.UpstreamModelSyncErrorUnsupported:
 				response.BadRequest(c, syncErr.SafeMessage())
+			case service.UpstreamModelSyncErrorInternal:
+				response.InternalError(c, syncErr.SafeMessage())
 			default:
 				slog.Warn("sync_upstream_models_preview_failed", "platform", req.Platform, "kind", syncErr.Kind)
 				response.Error(c, http.StatusBadGateway, syncErr.SafeMessage())
@@ -2843,7 +2847,7 @@ func (h *AccountHandler) SyncUpstreamModelsPreview(c *gin.Context) {
 		return
 	}
 
-	response.Success(c, gin.H{"models": models})
+	response.Success(c, catalog)
 }
 
 // SetPrivacy handles setting privacy for a single OpenAI/Antigravity OAuth account

backend/internal/handler/admin/account_handler_available_models_test.go

@@ -38,14 +38,20 @@ func setupAvailableModelsRouter(adminSvc service.AdminService) *gin.Engine {
 }
 
 type syncUpstreamHTTPUpstream struct {
-	resp *http.Response
-	err  error
+	resp      *http.Response
+	responses []*http.Response
+	err       error
 }
 
 func (u *syncUpstreamHTTPUpstream) Do(req *http.Request, proxyURL string, accountID int64, accountConcurrency int) (*http.Response, error) {
 	if u.err != nil {
 		return nil, u.err
 	}
+	if len(u.responses) > 0 {
+		resp := u.responses[0]
+		u.responses = u.responses[1:]
+		return resp, nil
+	}
 	return u.resp, nil
 }
 
@@ -347,6 +353,46 @@ func TestAccountHandlerSyncUpstreamModels_ConfigErrorReturnsBadRequest(t *testin
 	require.Contains(t, rec.Body.String(), "No OpenAI API key is available")
 }
 
+func TestAccountHandlerSyncUpstreamModelsReturnsCapabilityMetadata(t *testing.T) {
+	svc := &availableModelsAdminService{
+		stubAdminService: newStubAdminService(),
+		account: service.Account{
+			ID: 48, Name: "custom-openai", Platform: service.PlatformOpenAI,
+			Type: service.AccountTypeAPIKey, Status: service.StatusActive,
+			Credentials: map[string]any{"api_key": "key", "base_url": "https://provider.example/v1"},
+		},
+	}
+	upstream := &syncUpstreamHTTPUpstream{resp: &http.Response{
+		StatusCode: http.StatusOK,
+		Header:     http.Header{"Content-Type": []string{"application/json"}},
+		Body: io.NopCloser(strings.NewReader(`{"models":[{
+			"id":"custom-thinking-model",
+			"reasoning":true,
+			"default_reasoning_level":"high",
+			"supported_reasoning_levels":["low","high"],
+			"input_modalities":["text","image"],
+			"context_window":256000
+		}]}`)),
+	}}
+	router := setupSyncUpstreamModelsRouter(svc, upstream)
+
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/admin/accounts/48/models/sync-upstream", nil)
+	router.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+	var resp struct {
+		Data service.UpstreamModelCatalog `json:"data"`
+	}
+	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
+	require.Equal(t, []string{"custom-thinking-model"}, resp.Data.Models)
+	metadata := resp.Data.Metadata["custom-thinking-model"]
+	require.NotNil(t, metadata.Reasoning)
+	require.True(t, *metadata.Reasoning)
+	require.Equal(t, []string{"low", "high"}, metadata.SupportedReasoningLevels)
+	require.Equal(t, []string{"text", "image"}, metadata.InputModalities)
+}
+
 func TestAccountHandlerSyncUpstreamModels_UpstreamErrorDoesNotExposeBody(t *testing.T) {
 	svc := &availableModelsAdminService{
 		stubAdminService: newStubAdminService(),
@@ -377,3 +423,52 @@ func TestAccountHandlerSyncUpstreamModels_UpstreamErrorDoesNotExposeBody(t *test
 	require.Contains(t, rec.Body.String(), "Upstream model list request failed with HTTP 502")
 	require.NotContains(t, rec.Body.String(), "SECRET_TOKEN")
 }
+
+// Scenario: 能力补全失败显示部分成功。
+func TestAccountHandlerSyncUpstreamModels_MetadataEnrichmentFailureReturnsWarning(t *testing.T) {
+	svc := &availableModelsAdminService{
+		stubAdminService: newStubAdminService(),
+		account: service.Account{
+			ID:       46,
+			Name:     "opencode-id-only-model-list",
+			Platform: service.PlatformOpenAI,
+			Type:     service.AccountTypeAPIKey,
+			Status:   service.StatusActive,
+			Credentials: map[string]any{
+				"api_key":  "opencode-key",
+				"base_url": "https://opencode.ai/zen/v1",
+			},
+		},
+	}
+	upstream := &syncUpstreamHTTPUpstream{responses: []*http.Response{
+		{
+			StatusCode: http.StatusOK,
+			Header:     http.Header{"Content-Type": []string{"application/json"}},
+			Body:       io.NopCloser(strings.NewReader(`{"data":[{"id":"x-preview-f-free"}]}`)),
+		},
+		{
+			StatusCode: http.StatusBadGateway,
+			Header:     http.Header{"Content-Type": []string{"application/json"}},
+			Body:       io.NopCloser(strings.NewReader(`{"error":"registry unavailable"}`)),
+		},
+	}}
+	router := setupSyncUpstreamModelsRouter(svc, upstream)
+
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/admin/accounts/46/models/sync-upstream", nil)
+	router.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+	var resp struct {
+		Data struct {
+			Models   []string `json:"models"`
+			Warnings []struct {
+				Code string `json:"code"`
+			} `json:"warnings"`
+		} `json:"data"`
+	}
+	require.NoError(t, json.Unmarshal(rec.Body.Bytes(), &resp))
+	require.Equal(t, []string{"x-preview-f-free"}, resp.Data.Models)
+	require.Len(t, resp.Data.Warnings, 1)
+	require.Equal(t, "upstream_model_metadata_incomplete", resp.Data.Warnings[0].Code)
+}