feat(template): add Neo4j template

internal/controller/component_controller.go

@@ -163,6 +163,8 @@ func (r *ComponentReconciler) getComponentReconciler(comp *v1alpha1.Component, s
 		return reconciler.NewLiteLLMReconciler(r.Client, r.Scheme, stack, comp)
 	case "qdrant":
 		return reconciler.NewQdrantReconciler(r.Client, r.Scheme, stack, comp)
+	case "neo4j":
+		return reconciler.NewNeo4jReconciler(r.Client, r.Scheme, stack, comp)
 	default:
 		return reconciler.NewDefaultComponentReconciler(r.Client, r.Scheme, stack, comp)
 	}

internal/reconciler/neo4j.go

@@ -0,0 +1,58 @@
+/*
+Copyright 2026 LocoStack.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package reconciler
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/LocoStack/loco-operator/api/v1alpha1"
+	"k8s.io/apimachinery/pkg/runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+const (
+	NEO4J_DEFAULT_STORAGE_SIZE = "1Gi"
+)
+
+type Neo4jReconciler struct {
+	*DefaultComponentReconciler
+	client    client.Client
+	scheme    *runtime.Scheme
+	stack     *v1alpha1.Stack
+	component *v1alpha1.Component
+}
+
+func NewNeo4jReconciler(client client.Client, scheme *runtime.Scheme, stack *v1alpha1.Stack, component *v1alpha1.Component) *Neo4jReconciler {
+	return &Neo4jReconciler{
+		DefaultComponentReconciler: NewDefaultComponentReconciler(client, scheme, stack, component),
+		client:                     client,
+		scheme:                     scheme,
+		stack:                      stack,
+		component:                  component,
+	}
+}
+
+func (r *Neo4jReconciler) ReconcileComponent(ctx context.Context, tmpl *v1alpha1.Template, variables map[string]string) ([]client.Object, error) {
+	if err := r.ReconcileStorage(ctx, "neo4j", NEO4J_DEFAULT_STORAGE_SIZE); err != nil {
+		return nil, fmt.Errorf("reconciling neo4j persistent volume: %w", err)
+	}
+	if _, err := r.DefaultComponentReconciler.ReconcileComponent(ctx, tmpl, variables); err != nil {
+		return nil, err
+	}
+	return nil, nil
+}

pkg/templates/neo4j/template.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2026 LocoStack.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package neo4j
+
+import (
+	"github.com/LocoStack/loco-operator/api/v1alpha1"
+	corev1 "k8s.io/api/core/v1"
+)
+
+const (
+	NEO4J_DATA_PATH = "/data"
+)
+
+var Neo4jTemplate = v1alpha1.Template{
+	Name: "neo4j",
+	Spec: v1alpha1.TemplateSpec{
+		Runtime: v1alpha1.RuntimeSpec{
+			Name:  "neo4j",
+			Image: "neo4j:5.26-community",
+			Env: []corev1.EnvVar{
+				{Name: "NEO4J_AUTH", Value: "none"},
+			},
+			VolumeMounts: []corev1.VolumeMount{
+				{Name: "data", MountPath: NEO4J_DATA_PATH},
+			},
+			Port: 7687,
+		},
+		Volumes: []corev1.Volume{
+			{
+				Name: "data",
+				VolumeSource: corev1.VolumeSource{
+					PersistentVolumeClaim: &corev1.PersistentVolumeClaimVolumeSource{
+						ClaimName: "$(metadata.name)-neo4j",
+					},
+				},
+			},
+		},
+	},
+}

pkg/templates/templates.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/LocoStack/loco-operator/api/v1alpha1"
 	"github.com/LocoStack/loco-operator/pkg/templates/litellm"
+	"github.com/LocoStack/loco-operator/pkg/templates/neo4j"
 	"github.com/LocoStack/loco-operator/pkg/templates/qdrant"
 	corev1 "k8s.io/api/core/v1"
 )
@@ -243,4 +244,6 @@ func init() {
 	Manager.RegisterRuntime(litellm.LiteLLMTemplate.Spec.Runtime)
 	Manager.RegisterTemplate(qdrant.QdrantTemplate)
 	Manager.RegisterRuntime(qdrant.QdrantTemplate.Spec.Runtime)
+	Manager.RegisterTemplate(neo4j.Neo4jTemplate)
+	Manager.RegisterRuntime(neo4j.Neo4jTemplate.Spec.Runtime)
 }