diff --git a/docs/reference/index.md b/docs/reference/index.md
index abb6661..39dbd52 100644
--- a/docs/reference/index.md
+++ b/docs/reference/index.md
@@ -53,4 +53,5 @@ Cluster configuration and application registry.
 Network storage and backup configuration.
 
 - [[storage/sifaka|Sifaka]] - Synology NAS configuration
+- [[storage/postgresql|PostgreSQL]] - Database cluster
 - [[storage/backups|Backups]] - Backup policy and schedule
diff --git a/docs/reference/storage/postgresql.md b/docs/reference/storage/postgresql.md
new file mode 100644
index 0000000..e1f965e
--- /dev/null
+++ b/docs/reference/storage/postgresql.md
@@ -0,0 +1,10 @@
+---
+title: PostgreSQL
+tags:
+  - storage
+  - database
+---
+
+# PostgreSQL
+
+See [[services/postgresql|PostgreSQL]] in Services.