EF Core Migration Bundles Offer Safer, Auditable Schema Deployments for Production

EF Core migration bundles are self-contained executables that package all pending migrations for a given DbContext, eliminating the need for source code or developer tooling on target machines. They are built using the dotnet ef migrations bundle command, with options to target specific runtimes such as linux-x64 or win-x64. Unlike the common practice of calling MigrateAsync at application startup, bundles run as a separate, one-shot process outside the app lifecycle, reducing risks like race conditions and privilege escalation. Because they execute sequentially and independently, they are considered safer for production environments, CI/CD pipelines, and architectures involving multiple services sharing a database. Bundles are a deployment mechanism layered on top of existing EF Core migrations, not a replacement for the standard migration workflow.