Updated scope

SCOPE.md

@@ -88,6 +88,31 @@ Railiance is structured as five independent repos per OAS Stack layer. This repo
 
 ---
 
+## Provided Capabilities
+
+```capability
+type: infrastructure
+title: PostgreSQL HA (repmgr + pgpool)
+description: Highly available PostgreSQL cluster using repmgr for replication and pgpool for connection pooling — shared database service for all platform applications.
+keywords: [postgresql, postgres, ha, repmgr, pgpool, database, replication]
+```
+
+```capability
+type: infrastructure
+title: Valkey / Redis-compatible cache
+description: Shared Redis-compatible cache service (Valkey) for all applications in the Railiance stack.
+keywords: [valkey, redis, cache, shared, session, queue]
+```
+
+```capability
+type: data
+title: Object storage (MinIO / S3-compatible)
+description: S3-compatible object storage service (MinIO) for artifact storage, backups, and large file handling across platform applications.
+keywords: [minio, s3, object-storage, storage, artifacts, backup]
+```
+
+---
+
 ## Getting Oriented
 
 - Start with: `CLAUDE.md` (session protocol, boundary rules)