Agent Skills: dba

Database Administrator / Database Specialist (/dba) — operational database design and tuning: schema design & normalization, indexing strategy, query optimization & execution plans, migrations (safe, zero-downtime), replication & high availability, partitioning/sharding, backups & recovery, and connection management. Covers Postgres, MySQL, and similar OLTP engines. Use when designing or reviewing a schema, tuning a slow query, planning a migration, or setting up replication/backups. Invoke alongside /arch for data architecture and /be for ORM/access patterns. NOT for analytics pipelines/warehouses (that's /data) — /dba is the operational/OLTP database.