diff --git a/angular.json b/angular.json
index 72cbb99..7e17eb3 100644
--- a/angular.json
+++ b/angular.json
@@ -49,6 +49,10 @@
                 {
                   "replace": "src/app/interceptors/mock-data.interceptor.ts",
                   "with": "src/app/interceptors/mock-data.interceptor.production.ts"
+                },
+                {
+                  "replace": "src/app/mock-gateway.providers.ts",
+                  "with": "src/app/mock-gateway.providers.production.ts"
                 }
               ],
               "styles": [
diff --git a/scripts/ci/scan-bundle.sh b/scripts/ci/scan-bundle.sh
index 2379405..bdb7403 100644
--- a/scripts/ci/scan-bundle.sh
+++ b/scripts/ci/scan-bundle.sh
@@ -2,6 +2,13 @@
 # Fails the build if a production bundle contains anything that should only
 # ever exist server-side.
 #
+# It also fails on mock gateway code, for the same reason in a different
+# register: a production build that can reach a *LocalGateway is a production
+# build that can serve seeded fixtures as if they were real data. Those used to
+# ship - a fixture string from partner-hierarchy-local.gateway.ts was present in
+# a production bundle on 2026-08-21 - because naming both classes in a token
+# factory kept both reachable no matter what the flag said.
+#
 # Why this exists: the storefront used to send provider payment credentials
 # from the browser - an `authorization-key` header, a `userid-value` header,
 # and a hardcoded partner ID literal compiled into the bundle. That code is
@@ -30,6 +37,8 @@ PATTERNS=(
   "private key block|BEGIN (RSA |EC |OPENSSH )?PRIVATE KEY"
   "aws access key|AKIA[0-9A-Z]{16}"
   "telegram bot token|[0-9]{8,10}:AA[0-9A-Za-z_-]{33}"
+  "mock gateway class|[A-Za-z]+LocalGateway"
+  "mock gateway fixture|ptr_local|customer_vk_mock"
 )
 
 failed=0
@@ -49,7 +58,9 @@ done
 
 if [[ $failed -ne 0 ]]; then
   echo >&2
-  echo "A credential reached the browser bundle. Move it behind the API." >&2
+  echo "Something reached the browser bundle that should not have." >&2
+  echo "Credentials belong behind the API; mock gateways belong in dev-only" >&2
+  echo "providers swapped out by angular.json fileReplacements." >&2
   exit 1
 fi
 
diff --git a/src/app/app.config.ts b/src/app/app.config.ts
index 98534c8..5cdbe2f 100644
--- a/src/app/app.config.ts
+++ b/src/app/app.config.ts
@@ -16,6 +16,7 @@ import { MockMediaRepository } from './core/media/mock-media-repository.service'
 import { ApiConfigService } from './core/config/api-config.service';
 import { TenantResolverService } from './core/config/tenant-resolver.service';
 import { environment } from '../environments/environment';
+import { MOCK_GATEWAY_PROVIDERS } from './mock-gateway.providers';
 
 export const appConfig: ApplicationConfig = {
   providers: [
@@ -72,6 +73,9 @@ export const appConfig: ApplicationConfig = {
     provideServiceWorker('ngsw-worker.js', {
       enabled: !isDevMode(),
       registrationStrategy: 'registerWhenStable:30000'
-    })
+    }),
+    // Empty in production - the file is swapped at build time so no mock
+    // gateway is even importable there. See mock-gateway.providers.ts.
+    ...MOCK_GATEWAY_PROVIDERS
   ]
 };
diff --git a/src/app/core/analytics/services/analytics-gateway.token.ts b/src/app/core/analytics/services/analytics-gateway.token.ts
index af1b2d2..8bb6e9e 100644
--- a/src/app/core/analytics/services/analytics-gateway.token.ts
+++ b/src/app/core/analytics/services/analytics-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { AnalyticsGateway } from './analytics-gateway.interface';
-import { AnalyticsLocalGateway } from './analytics-local.gateway';
 import { AnalyticsApiGateway } from './analytics-api.gateway';
 
 /** Swap point for docs/backend/TRACK-A-ANALYTICS-CONTRACT.md §1. */
 export const ANALYTICS_GATEWAY = new InjectionToken<AnalyticsGateway>('ANALYTICS_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AnalyticsLocalGateway) : inject(AnalyticsApiGateway)),
+  factory: () => inject(AnalyticsApiGateway),
 });
diff --git a/src/app/core/cart/services/server-cart-gateway.token.ts b/src/app/core/cart/services/server-cart-gateway.token.ts
index b622b45..a690884 100644
--- a/src/app/core/cart/services/server-cart-gateway.token.ts
+++ b/src/app/core/cart/services/server-cart-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { ServerCartGateway } from './server-cart-gateway.interface';
-import { ServerCartLocalGateway } from './server-cart-local.gateway';
 import { ServerCartApiGateway } from './server-cart-api.gateway';
 
 /** Swap point for docs/backend/PHASE-6-CART-CHECKOUT-CONTRACT.md §3, §5. */
 export const SERVER_CART_GATEWAY = new InjectionToken<ServerCartGateway>('SERVER_CART_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(ServerCartLocalGateway) : inject(ServerCartApiGateway)),
+  factory: () => inject(ServerCartApiGateway),
 });
diff --git a/src/app/core/content-modules/services/mall-content-gateway.token.ts b/src/app/core/content-modules/services/mall-content-gateway.token.ts
index 18ca97e..0b7b314 100644
--- a/src/app/core/content-modules/services/mall-content-gateway.token.ts
+++ b/src/app/core/content-modules/services/mall-content-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { MallContentGateway } from './mall-content-gateway.interface';
-import { MallContentLocalGateway } from './mall-content-local.gateway';
 import { MallContentApiGateway } from './mall-content-api.gateway';
 
 /** Swap point for docs/backend/PHASE-10-CONTENT-MODULES-CONTRACT.md. */
 export const MALL_CONTENT_GATEWAY = new InjectionToken<MallContentGateway>('MALL_CONTENT_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(MallContentLocalGateway) : inject(MallContentApiGateway)),
+  factory: () => inject(MallContentApiGateway),
 });
diff --git a/src/app/core/finance/services/finance-gateway.token.ts b/src/app/core/finance/services/finance-gateway.token.ts
index a51d8ce..d7dd8c8 100644
--- a/src/app/core/finance/services/finance-gateway.token.ts
+++ b/src/app/core/finance/services/finance-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { FinanceGateway } from './finance-gateway.interface';
-import { FinanceLocalGateway } from './finance-local.gateway';
 import { FinanceApiGateway } from './finance-api.gateway';
 
 /** Swap point for docs/backend/PHASE-7-PAYMENTS-RECONCILIATION-CONTRACT.md. */
 export const FINANCE_GATEWAY = new InjectionToken<FinanceGateway>('FINANCE_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(FinanceLocalGateway) : inject(FinanceApiGateway)),
+  factory: () => inject(FinanceApiGateway),
 });
diff --git a/src/app/core/identity/services/social-identity-gateway.token.ts b/src/app/core/identity/services/social-identity-gateway.token.ts
index ced18ec..e7fbe9d 100644
--- a/src/app/core/identity/services/social-identity-gateway.token.ts
+++ b/src/app/core/identity/services/social-identity-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { SocialIdentityGateway } from './social-identity-gateway.interface';
-import { SocialIdentityLocalGateway } from './social-identity-local.gateway';
 import { SocialIdentityApiGateway } from './social-identity-api.gateway';
 
 /** Swap point for docs/backend/PHASE-8-IDENTITY-MESSAGING-CONTRACT.md §2. */
 export const SOCIAL_IDENTITY_GATEWAY = new InjectionToken<SocialIdentityGateway>('SOCIAL_IDENTITY_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(SocialIdentityLocalGateway) : inject(SocialIdentityApiGateway)),
+  factory: () => inject(SocialIdentityApiGateway),
 });
diff --git a/src/app/core/integrations/services/connector-gateway.token.ts b/src/app/core/integrations/services/connector-gateway.token.ts
index f416cdf..290c518 100644
--- a/src/app/core/integrations/services/connector-gateway.token.ts
+++ b/src/app/core/integrations/services/connector-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { ConnectorGateway } from './connector-gateway.interface';
-import { ConnectorLocalGateway } from './connector-local.gateway';
 import { ConnectorApiGateway } from './connector-api.gateway';
 
 /** Swap point for docs/backend/PHASE-4-CONNECTOR-FRAMEWORK-CONTRACT.md §7. */
 export const CONNECTOR_GATEWAY = new InjectionToken<ConnectorGateway>('CONNECTOR_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(ConnectorLocalGateway) : inject(ConnectorApiGateway)),
+  factory: () => inject(ConnectorApiGateway),
 });
diff --git a/src/app/core/marketplace-registry/services/marketplace-gateway.token.ts b/src/app/core/marketplace-registry/services/marketplace-gateway.token.ts
index f1c492b..c8ea6c0 100644
--- a/src/app/core/marketplace-registry/services/marketplace-gateway.token.ts
+++ b/src/app/core/marketplace-registry/services/marketplace-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { MarketplaceGateway } from './marketplace-gateway.interface';
-import { MarketplaceLocalGateway } from './marketplace-local.gateway';
 import { MarketplaceApiGateway } from './marketplace-api.gateway';
 
 /** Swap point for docs/backend/PHASE-9-TENANT-REGISTRY-DOMAINS-CONTRACT.md. */
 export const MARKETPLACE_GATEWAY = new InjectionToken<MarketplaceGateway>('MARKETPLACE_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(MarketplaceLocalGateway) : inject(MarketplaceApiGateway)),
+  factory: () => inject(MarketplaceApiGateway),
 });
diff --git a/src/app/core/marketplace-registry/services/marketplace-revision-gateway.token.ts b/src/app/core/marketplace-registry/services/marketplace-revision-gateway.token.ts
index e18cdf9..da6c99b 100644
--- a/src/app/core/marketplace-registry/services/marketplace-revision-gateway.token.ts
+++ b/src/app/core/marketplace-registry/services/marketplace-revision-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { MarketplaceRevisionGateway } from './marketplace-revision-gateway.interface';
-import { MarketplaceRevisionLocalGateway } from './marketplace-revision-local.gateway';
 import { MarketplaceRevisionApiGateway } from './marketplace-revision-api.gateway';
 
 /** Swap point for docs/backend/PHASE-9-TENANT-REGISTRY-DOMAINS-CONTRACT.md §5. */
 export const MARKETPLACE_REVISION_GATEWAY = new InjectionToken<MarketplaceRevisionGateway>('MARKETPLACE_REVISION_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(MarketplaceRevisionLocalGateway) : inject(MarketplaceRevisionApiGateway)),
+  factory: () => inject(MarketplaceRevisionApiGateway),
 });
diff --git a/src/app/core/offers/services/offer-gateway.token.ts b/src/app/core/offers/services/offer-gateway.token.ts
index a237433..c5f4acb 100644
--- a/src/app/core/offers/services/offer-gateway.token.ts
+++ b/src/app/core/offers/services/offer-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { OfferGateway } from './offer-gateway.interface';
-import { OfferLocalGateway } from './offer-local.gateway';
 import { OfferApiGateway } from './offer-api.gateway';
 
 /** Swap point for docs/backend/PHASE-3-CATALOG-OFFER-FULFILLMENT-CONTRACT.md §7. */
 export const OFFER_GATEWAY = new InjectionToken<OfferGateway>('OFFER_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(OfferLocalGateway) : inject(OfferApiGateway)),
+  factory: () => inject(OfferApiGateway),
 });
diff --git a/src/app/core/partner-hierarchy/services/partner-hierarchy-gateway.token.ts b/src/app/core/partner-hierarchy/services/partner-hierarchy-gateway.token.ts
index e82017c..74b84c6 100644
--- a/src/app/core/partner-hierarchy/services/partner-hierarchy-gateway.token.ts
+++ b/src/app/core/partner-hierarchy/services/partner-hierarchy-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { PartnerHierarchyGateway } from './partner-hierarchy-gateway.interface';
-import { PartnerHierarchyLocalGateway } from './partner-hierarchy-local.gateway';
 import { PartnerHierarchyApiGateway } from './partner-hierarchy-api.gateway';
 
 /** Swap point for docs/backend/PARTNER-PROVISIONING-API-CONTRACT.md §4, §6. */
 export const PARTNER_HIERARCHY_GATEWAY = new InjectionToken<PartnerHierarchyGateway>('PARTNER_HIERARCHY_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(PartnerHierarchyLocalGateway) : inject(PartnerHierarchyApiGateway)),
+  factory: () => inject(PartnerHierarchyApiGateway),
 });
diff --git a/src/app/core/permissions/services/permission-gateway.token.ts b/src/app/core/permissions/services/permission-gateway.token.ts
index c11bdb8..5a074b2 100644
--- a/src/app/core/permissions/services/permission-gateway.token.ts
+++ b/src/app/core/permissions/services/permission-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { PermissionGateway } from './permission-gateway.interface';
-import { PermissionLocalGateway } from './permission-local.gateway';
 import { PermissionApiGateway } from './permission-api.gateway';
 
 /** Swap point for docs/backend/TRACK-S-SECURITY-RBAC-CONTRACT.md §2-3. */
 export const PERMISSION_GATEWAY = new InjectionToken<PermissionGateway>('PERMISSION_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(PermissionLocalGateway) : inject(PermissionApiGateway)),
+  factory: () => inject(PermissionApiGateway),
 });
diff --git a/src/app/core/pricing/services/fx-quote-gateway.token.ts b/src/app/core/pricing/services/fx-quote-gateway.token.ts
index 6336fc9..2a54e53 100644
--- a/src/app/core/pricing/services/fx-quote-gateway.token.ts
+++ b/src/app/core/pricing/services/fx-quote-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { FxQuoteGateway } from './fx-quote-gateway.interface';
-import { FxQuoteLocalGateway } from './fx-quote-local.gateway';
 import { FxQuoteApiGateway } from './fx-quote-api.gateway';
 
 /** Swap point for docs/backend/PHASE-1-MONEY-FX-PAYMENTS-CONTRACT.md §3.1. */
 export const FX_QUOTE_GATEWAY = new InjectionToken<FxQuoteGateway>('FX_QUOTE_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(FxQuoteLocalGateway) : inject(FxQuoteApiGateway)),
+  factory: () => inject(FxQuoteApiGateway),
 });
diff --git a/src/app/core/sellers/services/seller-gateway.token.ts b/src/app/core/sellers/services/seller-gateway.token.ts
index c1972e7..d4444c1 100644
--- a/src/app/core/sellers/services/seller-gateway.token.ts
+++ b/src/app/core/sellers/services/seller-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../environments/environment';
 import { SellerGateway } from './seller-gateway.interface';
-import { SellerLocalGateway } from './seller-local.gateway';
 import { SellerApiGateway } from './seller-api.gateway';
 
 /** Swap point for docs/backend/PHASE-5-SELLER-PORTAL-CONTRACT.md §3. */
 export const SELLER_GATEWAY = new InjectionToken<SellerGateway>('SELLER_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(SellerLocalGateway) : inject(SellerApiGateway)),
+  factory: () => inject(SellerApiGateway),
 });
diff --git a/src/app/features/admin/dashboard/services/admin-dashboard-metrics-gateway.token.ts b/src/app/features/admin/dashboard/services/admin-dashboard-metrics-gateway.token.ts
index 2ab37b2..7ff99e0 100644
--- a/src/app/features/admin/dashboard/services/admin-dashboard-metrics-gateway.token.ts
+++ b/src/app/features/admin/dashboard/services/admin-dashboard-metrics-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../../environments/environment';
 import { AdminDashboardMetricsGateway } from './admin-dashboard-metrics.gateway.interface';
-import { AdminDashboardMetricsLocalGateway } from './admin-dashboard-metrics.local.gateway';
 import { AdminDashboardMetricsApiGateway } from './admin-dashboard-metrics-api.gateway';
 
 /** Swap point. */
 export const ADMIN_DASHBOARD_METRICS_GATEWAY = new InjectionToken<AdminDashboardMetricsGateway>('ADMIN_DASHBOARD_METRICS_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AdminDashboardMetricsLocalGateway) : inject(AdminDashboardMetricsApiGateway)),
+  factory: () => inject(AdminDashboardMetricsApiGateway),
 });
diff --git a/src/app/features/admin/moderation/services/admin-moderation-gateway.token.ts b/src/app/features/admin/moderation/services/admin-moderation-gateway.token.ts
index b860008..e847c65 100644
--- a/src/app/features/admin/moderation/services/admin-moderation-gateway.token.ts
+++ b/src/app/features/admin/moderation/services/admin-moderation-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../../environments/environment';
 import { AdminModerationGateway } from './admin-moderation-gateway.interface';
-import { AdminModerationLocalGateway } from './admin-moderation-local.gateway';
 import { AdminModerationApiGateway } from './admin-moderation-api.gateway';
 
 /** Swap point. */
 export const ADMIN_MODERATION_GATEWAY = new InjectionToken<AdminModerationGateway>('ADMIN_MODERATION_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AdminModerationLocalGateway) : inject(AdminModerationApiGateway)),
+  factory: () => inject(AdminModerationApiGateway),
 });
diff --git a/src/app/features/admin/monitoring/services/admin-monitoring-gateway.token.ts b/src/app/features/admin/monitoring/services/admin-monitoring-gateway.token.ts
index e95daf0..1858645 100644
--- a/src/app/features/admin/monitoring/services/admin-monitoring-gateway.token.ts
+++ b/src/app/features/admin/monitoring/services/admin-monitoring-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../../environments/environment';
 import { AdminMonitoringGateway } from './admin-monitoring-gateway.interface';
-import { AdminMonitoringLocalGateway } from './admin-monitoring-local.gateway';
 import { AdminMonitoringApiGateway } from './admin-monitoring-api.gateway';
 
 /** Swap point. */
 export const ADMIN_MONITORING_GATEWAY = new InjectionToken<AdminMonitoringGateway>('ADMIN_MONITORING_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AdminMonitoringLocalGateway) : inject(AdminMonitoringApiGateway)),
+  factory: () => inject(AdminMonitoringApiGateway),
 });
diff --git a/src/app/features/admin/notifications/services/admin-notifications-gateway.token.ts b/src/app/features/admin/notifications/services/admin-notifications-gateway.token.ts
index 91e313e..91b3b6e 100644
--- a/src/app/features/admin/notifications/services/admin-notifications-gateway.token.ts
+++ b/src/app/features/admin/notifications/services/admin-notifications-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../../environments/environment';
 import { AdminNotificationsGateway } from './admin-notifications-gateway.interface';
-import { AdminNotificationsLocalGateway } from './admin-notifications-local.gateway';
 import { AdminNotificationsApiGateway } from './admin-notifications-api.gateway';
 
 /** Swap point for docs/backend/PHASE-2-ORDERS-NOTIFICATIONS-CONTRACT.md §7. */
 export const ADMIN_NOTIFICATIONS_GATEWAY = new InjectionToken<AdminNotificationsGateway>('ADMIN_NOTIFICATIONS_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AdminNotificationsLocalGateway) : inject(AdminNotificationsApiGateway)),
+  factory: () => inject(AdminNotificationsApiGateway),
 });
diff --git a/src/app/features/admin/orders/services/admin-orders-gateway.token.ts b/src/app/features/admin/orders/services/admin-orders-gateway.token.ts
index 42dd680..2852195 100644
--- a/src/app/features/admin/orders/services/admin-orders-gateway.token.ts
+++ b/src/app/features/admin/orders/services/admin-orders-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../../environments/environment';
 import { AdminOrdersGateway } from './admin-orders-gateway.interface';
-import { AdminOrdersLocalGateway } from './admin-orders-local.gateway';
 import { AdminOrdersApiGateway } from './admin-orders-api.gateway';
 
 /** Swap point for docs/backend/PHASE-2-ORDERS-NOTIFICATIONS-CONTRACT.md. */
 export const ADMIN_ORDERS_GATEWAY = new InjectionToken<AdminOrdersGateway>('ADMIN_ORDERS_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AdminOrdersLocalGateway) : inject(AdminOrdersApiGateway)),
+  factory: () => inject(AdminOrdersApiGateway),
 });
diff --git a/src/app/features/admin/products/services/admin-products-gateway.token.ts b/src/app/features/admin/products/services/admin-products-gateway.token.ts
index 5e414c2..a04b2c5 100644
--- a/src/app/features/admin/products/services/admin-products-gateway.token.ts
+++ b/src/app/features/admin/products/services/admin-products-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../../environments/environment';
 import { AdminProductsGateway } from './admin-products-gateway.interface';
-import { AdminProductsLocalGateway } from './admin-products-local.gateway';
 import { AdminProductsApiGateway } from './admin-products-api.gateway';
 
 /** Swap point for docs/backend/PHASE-3-CATALOG-OFFER-FULFILLMENT-CONTRACT.md §7. */
 export const ADMIN_PRODUCTS_GATEWAY = new InjectionToken<AdminProductsGateway>('ADMIN_PRODUCTS_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AdminProductsLocalGateway) : inject(AdminProductsApiGateway)),
+  factory: () => inject(AdminProductsApiGateway),
 });
diff --git a/src/app/features/admin/transactions/services/admin-transactions-gateway.token.ts b/src/app/features/admin/transactions/services/admin-transactions-gateway.token.ts
index 972a892..86c0fc4 100644
--- a/src/app/features/admin/transactions/services/admin-transactions-gateway.token.ts
+++ b/src/app/features/admin/transactions/services/admin-transactions-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../../environments/environment';
 import { AdminTransactionsGateway } from './admin-transactions-gateway.interface';
-import { AdminTransactionsLocalGateway } from './admin-transactions-local.gateway';
 import { AdminTransactionsApiGateway } from './admin-transactions-api.gateway';
 
 /** Swap point for docs/backend/PHASE-1-MONEY-FX-PAYMENTS-CONTRACT.md §6. */
 export const ADMIN_TRANSACTIONS_GATEWAY = new InjectionToken<AdminTransactionsGateway>('ADMIN_TRANSACTIONS_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AdminTransactionsLocalGateway) : inject(AdminTransactionsApiGateway)),
+  factory: () => inject(AdminTransactionsApiGateway),
 });
diff --git a/src/app/features/admin/users/services/admin-users-gateway.token.ts b/src/app/features/admin/users/services/admin-users-gateway.token.ts
index d144e46..22e9009 100644
--- a/src/app/features/admin/users/services/admin-users-gateway.token.ts
+++ b/src/app/features/admin/users/services/admin-users-gateway.token.ts
@@ -1,11 +1,9 @@
 import { InjectionToken, inject } from '@angular/core';
-import { environment } from '../../../../../environments/environment';
 import { AdminUsersGateway } from './admin-users-gateway.interface';
-import { AdminUsersLocalGateway } from './admin-users-local.gateway';
 import { AdminUsersApiGateway } from './admin-users-api.gateway';
 
 /** Swap point for docs/backend/TRACK-S-SECURITY-RBAC-CONTRACT.md §8. */
 export const ADMIN_USERS_GATEWAY = new InjectionToken<AdminUsersGateway>('ADMIN_USERS_GATEWAY', {
   providedIn: 'root',
-  factory: () => (environment.useMockData ? inject(AdminUsersLocalGateway) : inject(AdminUsersApiGateway)),
+  factory: () => inject(AdminUsersApiGateway),
 });
diff --git a/src/app/mock-gateway.providers.production.ts b/src/app/mock-gateway.providers.production.ts
new file mode 100644
index 0000000..3d92efd
--- /dev/null
+++ b/src/app/mock-gateway.providers.production.ts
@@ -0,0 +1,9 @@
+import { Provider } from '@angular/core';
+
+/**
+ * Production replacement for mock-gateway.providers.ts (angular.json
+ * fileReplacements). Imports nothing on purpose: this file existing is what
+ * guarantees no *LocalGateway or its fixtures can be reached from a
+ * production build.
+ */
+export const MOCK_GATEWAY_PROVIDERS: Provider[] = [];
diff --git a/src/app/mock-gateway.providers.ts b/src/app/mock-gateway.providers.ts
new file mode 100644
index 0000000..2fe4c09
--- /dev/null
+++ b/src/app/mock-gateway.providers.ts
@@ -0,0 +1,91 @@
+import { Provider } from '@angular/core';
+import { environment } from '../environments/environment';
+
+import { ADMIN_DASHBOARD_METRICS_GATEWAY } from './features/admin/dashboard/services/admin-dashboard-metrics-gateway.token';
+import { AdminDashboardMetricsLocalGateway } from './features/admin/dashboard/services/admin-dashboard-metrics.local.gateway';
+import { ADMIN_MODERATION_GATEWAY } from './features/admin/moderation/services/admin-moderation-gateway.token';
+import { AdminModerationLocalGateway } from './features/admin/moderation/services/admin-moderation-local.gateway';
+import { ADMIN_MONITORING_GATEWAY } from './features/admin/monitoring/services/admin-monitoring-gateway.token';
+import { AdminMonitoringLocalGateway } from './features/admin/monitoring/services/admin-monitoring-local.gateway';
+import { ADMIN_NOTIFICATIONS_GATEWAY } from './features/admin/notifications/services/admin-notifications-gateway.token';
+import { AdminNotificationsLocalGateway } from './features/admin/notifications/services/admin-notifications-local.gateway';
+import { ADMIN_ORDERS_GATEWAY } from './features/admin/orders/services/admin-orders-gateway.token';
+import { AdminOrdersLocalGateway } from './features/admin/orders/services/admin-orders-local.gateway';
+import { ADMIN_PRODUCTS_GATEWAY } from './features/admin/products/services/admin-products-gateway.token';
+import { AdminProductsLocalGateway } from './features/admin/products/services/admin-products-local.gateway';
+import { ADMIN_TRANSACTIONS_GATEWAY } from './features/admin/transactions/services/admin-transactions-gateway.token';
+import { AdminTransactionsLocalGateway } from './features/admin/transactions/services/admin-transactions-local.gateway';
+import { ADMIN_USERS_GATEWAY } from './features/admin/users/services/admin-users-gateway.token';
+import { AdminUsersLocalGateway } from './features/admin/users/services/admin-users-local.gateway';
+import { ANALYTICS_GATEWAY } from './core/analytics/services/analytics-gateway.token';
+import { AnalyticsLocalGateway } from './core/analytics/services/analytics-local.gateway';
+import { CONNECTOR_GATEWAY } from './core/integrations/services/connector-gateway.token';
+import { ConnectorLocalGateway } from './core/integrations/services/connector-local.gateway';
+import { FINANCE_GATEWAY } from './core/finance/services/finance-gateway.token';
+import { FinanceLocalGateway } from './core/finance/services/finance-local.gateway';
+import { FX_QUOTE_GATEWAY } from './core/pricing/services/fx-quote-gateway.token';
+import { FxQuoteLocalGateway } from './core/pricing/services/fx-quote-local.gateway';
+import { MALL_CONTENT_GATEWAY } from './core/content-modules/services/mall-content-gateway.token';
+import { MallContentLocalGateway } from './core/content-modules/services/mall-content-local.gateway';
+import { MARKETPLACE_GATEWAY } from './core/marketplace-registry/services/marketplace-gateway.token';
+import { MarketplaceLocalGateway } from './core/marketplace-registry/services/marketplace-local.gateway';
+import { MARKETPLACE_REVISION_GATEWAY } from './core/marketplace-registry/services/marketplace-revision-gateway.token';
+import { MarketplaceRevisionLocalGateway } from './core/marketplace-registry/services/marketplace-revision-local.gateway';
+import { OFFER_GATEWAY } from './core/offers/services/offer-gateway.token';
+import { OfferLocalGateway } from './core/offers/services/offer-local.gateway';
+import { PARTNER_HIERARCHY_GATEWAY } from './core/partner-hierarchy/services/partner-hierarchy-gateway.token';
+import { PartnerHierarchyLocalGateway } from './core/partner-hierarchy/services/partner-hierarchy-local.gateway';
+import { PERMISSION_GATEWAY } from './core/permissions/services/permission-gateway.token';
+import { PermissionLocalGateway } from './core/permissions/services/permission-local.gateway';
+import { SELLER_GATEWAY } from './core/sellers/services/seller-gateway.token';
+import { SellerLocalGateway } from './core/sellers/services/seller-local.gateway';
+import { SERVER_CART_GATEWAY } from './core/cart/services/server-cart-gateway.token';
+import { ServerCartLocalGateway } from './core/cart/services/server-cart-local.gateway';
+import { SOCIAL_IDENTITY_GATEWAY } from './core/identity/services/social-identity-gateway.token';
+import { SocialIdentityLocalGateway } from './core/identity/services/social-identity-local.gateway';
+
+/**
+ * Development-only gateway overrides.
+ *
+ * This file is swapped for mock-gateway.providers.production.ts at build time
+ * (see angular.json fileReplacements), the same mechanism
+ * mock-data.interceptor.production.ts already uses. The production copy
+ * imports nothing, so no *LocalGateway class - and none of its seeded
+ * fixtures - can reach a production bundle.
+ *
+ * It used to live inside each token factory as
+ *   factory: () => (environment.useMockData ? inject(XLocal) : inject(XApi))
+ * which reads as a toggle but is not one: naming both classes in the factory
+ * keeps both reachable, so every mock shipped regardless of the flag. A
+ * fixture string from partner-hierarchy-local.gateway.ts was verifiably
+ * present in a production build on 2026-08-21.
+ *
+ * useExisting rather than useClass: the local gateways are already
+ * providedIn: 'root' singletons, and an app-level provider for the token
+ * wins over its tree-shakable default.
+ */
+export const MOCK_GATEWAY_PROVIDERS: Provider[] = environment.useMockData
+  ? [
+    { provide: ADMIN_DASHBOARD_METRICS_GATEWAY, useExisting: AdminDashboardMetricsLocalGateway },
+    { provide: ADMIN_MODERATION_GATEWAY, useExisting: AdminModerationLocalGateway },
+    { provide: ADMIN_MONITORING_GATEWAY, useExisting: AdminMonitoringLocalGateway },
+    { provide: ADMIN_NOTIFICATIONS_GATEWAY, useExisting: AdminNotificationsLocalGateway },
+    { provide: ADMIN_ORDERS_GATEWAY, useExisting: AdminOrdersLocalGateway },
+    { provide: ADMIN_PRODUCTS_GATEWAY, useExisting: AdminProductsLocalGateway },
+    { provide: ADMIN_TRANSACTIONS_GATEWAY, useExisting: AdminTransactionsLocalGateway },
+    { provide: ADMIN_USERS_GATEWAY, useExisting: AdminUsersLocalGateway },
+    { provide: ANALYTICS_GATEWAY, useExisting: AnalyticsLocalGateway },
+    { provide: CONNECTOR_GATEWAY, useExisting: ConnectorLocalGateway },
+    { provide: FINANCE_GATEWAY, useExisting: FinanceLocalGateway },
+    { provide: FX_QUOTE_GATEWAY, useExisting: FxQuoteLocalGateway },
+    { provide: MALL_CONTENT_GATEWAY, useExisting: MallContentLocalGateway },
+    { provide: MARKETPLACE_GATEWAY, useExisting: MarketplaceLocalGateway },
+    { provide: MARKETPLACE_REVISION_GATEWAY, useExisting: MarketplaceRevisionLocalGateway },
+    { provide: OFFER_GATEWAY, useExisting: OfferLocalGateway },
+    { provide: PARTNER_HIERARCHY_GATEWAY, useExisting: PartnerHierarchyLocalGateway },
+    { provide: PERMISSION_GATEWAY, useExisting: PermissionLocalGateway },
+    { provide: SELLER_GATEWAY, useExisting: SellerLocalGateway },
+    { provide: SERVER_CART_GATEWAY, useExisting: ServerCartLocalGateway },
+    { provide: SOCIAL_IDENTITY_GATEWAY, useExisting: SocialIdentityLocalGateway },
+    ]
+  : [];