⚠ make spec.namespace optional with managed namespace support and PSA support

Makefile

@@ -685,6 +685,10 @@ crd-ref-docs: $(CRD_REF_DOCS) #EXHELP Generate the API Reference Documents.
 	$(CRD_REF_DOCS) --source-path=$(ROOT_DIR)/api/ \
 	--config=$(API_REFERENCE_DIR)/crd-ref-docs-gen-config.yaml \
 	--renderer=markdown --output-path=$(API_REFERENCE_DIR)/$(API_REFERENCE_FILENAME);
+	# crd-ref-docs renders doc-comment text verbatim, including internal <opcon:...> generator
+	# directives; strip them from the published reference (the per-channel contracts remain in prose).
+	sed -E 's#</?opcon:[^>]*>##g' $(API_REFERENCE_DIR)/$(API_REFERENCE_FILENAME) > $(API_REFERENCE_DIR)/$(API_REFERENCE_FILENAME).tmp
+	mv $(API_REFERENCE_DIR)/$(API_REFERENCE_FILENAME).tmp $(API_REFERENCE_DIR)/$(API_REFERENCE_FILENAME)
 
 VENVDIR := $(abspath docs/.venv)
 

api/v1/clusterextension_types.go

@@ -49,21 +49,34 @@ const (
 
 // ClusterExtensionSpec defines the desired state of ClusterExtension
 type ClusterExtensionSpec struct {
-	// namespace specifies a Kubernetes namespace.
-	// It designates the default namespace where namespace-scoped resources for the extension are applied to the cluster.
-	// Some extensions may contain namespace-scoped resources to be applied in other namespaces.
-	// This namespace must exist.
+	// namespace selects the namespace that namespace-scoped resources for the extension
+	// are applied to.
 	//
-	// The namespace field is required, immutable, and follows the DNS label standard as defined in [RFC 1123].
+	// <opcon:standard:description>
+	// In the standard configuration, namespace is required and must reference an existing
+	// namespace on the cluster.
+	// </opcon:standard:description>
+	// <opcon:experimental:description>
+	// BoxcutterRuntime feature set, namespace is optional.
+	// When set, it must reference an existing namespace. When omitted, operator-controller
+	// resolves and creates a managed namespace from bundle metadata. The mode (set vs omitted)
+	// is locked at creation time and cannot be changed.
+	// </opcon:experimental:description>
+	//
+	// The namespace field follows the DNS label standard as defined in [RFC 1123].
 	// It must contain only lowercase alphanumeric characters or hyphens (-), start and end with an alphanumeric character,
 	// and be no longer than 63 characters.
 	//
 	// [RFC 1123]: https://tools.ietf.org/html/rfc1123
 	//
+	// <opcon:standard:validation:Required>
+	// <opcon:standard:validation:XValidation:rule="self != ''",message="namespace is required">
+	// <opcon:experimental:validation:XValidation:rule="oldSelf != '' || self == ''",message="namespace cannot be set after creation; mode is locked at creation time">
+	//
 	// +kubebuilder:validation:MaxLength:=63
-	// +kubebuilder:validation:XValidation:rule="self == oldSelf",message="namespace is immutable"
-	// +kubebuilder:validation:XValidation:rule="self.matches(\"^[a-z0-9]([-a-z0-9]*[a-z0-9])?$\")",message="namespace must be a valid DNS1123 label"
-	// +required
+	// +kubebuilder:validation:XValidation:rule="self == '' || self.matches(\"^[a-z0-9]([-a-z0-9]*[a-z0-9])?$\")",message="namespace must be a valid DNS1123 label"
+	// +kubebuilder:validation:XValidation:rule="oldSelf == '' || self == oldSelf",message="namespace is immutable once set"
+	// +optional
 	Namespace string `json:"namespace"`
 
 	// serviceAccount is a deprecated field and is completely ignored.

cmd/operator-controller/main.go

@@ -507,6 +507,7 @@ func run() error {
 		IsWebhookSupportEnabled:     certProvider != nil,
 		IsSingleOwnNamespaceEnabled: features.OperatorControllerFeatureGate.Enabled(features.SingleOwnNamespaceInstallSupport),
 		IsDeploymentConfigEnabled:   features.OperatorControllerFeatureGate.Enabled(features.DeploymentConfig),
+		IsBoxcutterRuntimeEnabled:   features.OperatorControllerFeatureGate.Enabled(features.BoxcutterRuntime),
 	}
 	var cerCfg reconcilerConfigurator
 	if features.OperatorControllerFeatureGate.Enabled(features.BoxcutterRuntime) {
@@ -659,6 +660,7 @@ func (c *boxcutterReconcilerConfigurator) Configure(ceReconciler *controllers.Cl
 		controllers.RetrieveRevisionStates(revisionStatesGetter),
 		controllers.ResolveBundle(c.resolver, c.mgr.GetClient()),
 		controllers.UnpackBundle(c.imagePuller, c.imageCache),
+		controllers.ValidateInstallNamespace(coreClient),
 		controllers.ApplyBundleWithBoxcutter(appl.Apply),
 	}
 
@@ -746,6 +748,7 @@ func (c *helmReconcilerConfigurator) Configure(ceReconciler *controllers.Cluster
 		controllers.RetrieveRevisionStates(revisionStatesGetter),
 		controllers.ResolveBundle(c.resolver, c.mgr.GetClient()),
 		controllers.UnpackBundle(c.imagePuller, c.imageCache),
+		controllers.ValidateInstallNamespace(coreClient),
 		controllers.ApplyBundle(appl),
 	}