diff --git a/nulib/lib_provisioning/platform/mod.nu b/nulib/lib_provisioning/platform/mod.nu
index 67a737a..ffac814 100644
--- a/nulib/lib_provisioning/platform/mod.nu
+++ b/nulib/lib_provisioning/platform/mod.nu
@@ -15,11 +15,42 @@
 # - Service startup management and lifecycle
 # - CLI commands
 
-export use target.nu *
-export use discovery.nu *
-export use health.nu *
-export use credentials.nu *
-export use connection.nu *
-export use cli.nu *
-export use autostart.nu *
-export use service-manager.nu *
+# platform/ subsystem facade — selective re-exports (ADR-025 Phase 3 Layer 3).
+
+export use target.nu [
+    detect-platform-mode get-default-platform-target get-deployment-service-config
+    get-enabled-services get-platform-endpoint get-platform-service-config
+    is-platform-service-enabled list-enabled-platform-services
+    list-required-platform-services load-deployment-mode should-start-locally
+    validate-platform-target
+]
+export use discovery.nu [
+    is-service-available list-required-services list-services
+    service-config service-endpoint
+]
+export use health.nu [
+    check-all-services check-required-services check-service-health wait-for-service
+]
+export use credentials.nu [
+    credential-exists delete-credential get-credential get-credentials-namespace
+    list-workspace-credentials store-credential
+]
+export use connection.nu [
+    add-service-connection get-active-connections get-service-status
+    init-connection-metadata load-connection-metadata remove-service-connection
+    show-connection-status store-connection-metadata update-service-status
+]
+export use cli.nu [
+    platform-config platform-connections platform-health platform-init
+    platform-list platform-start platform-status
+]
+export use autostart.nu [
+    disable-autostart enable-autostart get-service-status restart-service
+    start-required-services start-service stop-service
+]
+export use service-manager.nu [
+    get-external-services get-service-port is-port-listening load-deployment-mode
+    load-service-config nats_health nats_start nats_stop ncl-sync-start
+    ncl-sync-status ncl-sync-stop normalize-service-name start-required-services
+    start-services stop-services
+]