Multi-tenant Safety Checker Ensure complete tenant isolation and prevent data leakage. Row Level Security (RLS) PostgreSQL RLS Setup Application-Level Tenant Context Tenant Isolation Checklist Automated Security Tests RLS Audit Script Composite Indexes for Performance Middleware for Automatic Tenant Injection Security Regression Tests Best Practices 1. Always use RLS : Don't rely on application logic alone 2. Force RLS : Even for table owners (FORCE ROW LEVEL SECURITY) 3. Test thoroughly : Automated tests for cross-tenant access 4. Audit regularly : Monthly RLS configuration audits 5. Composi…