SaaS Multi-Tenant Architecture When to Use This Skill - The user is building a SaaS application where multiple customers share the same database - The user asks about tenant isolation, row-level security, or data leakage prevention - The user needs to scope every database query to a specific tenant without manual WHERE clauses - The user asks about shared-schema vs schema-per-tenant vs database-per-tenant tradeoffs - The user is implementing admin endpoints that must access data across tenants - The user needs to add columns to an existing single-tenant application - The user asks about Postg…