C# 15 union types applied to a prescribing model: a dispensing outcome that is exactly one of three cases, handlers the compiler keeps exhaustive, and fifteen experiments on what unions compile to, how they behave when empty, what they cost, how they serialise, and how they work with .NET 10 and C# 14 code.
Read more →.NET 11 for Architects: What Changes a Design, and What Does Not
.NET 11 sorted by consequence: the two-year support window, the higher minimum CPU, behaviour that differs from .NET 10 on the same machine, Runtime Async in preview, and the library additions that let you delete a dependency. Each point backed by something that was run.
Read more →Azure Container Apps or AKS for a Regulated Workload: Who Patches What
For a regulated workload the container platform decision is mostly about who patches what and who can prove it. A ledger of thirteen operational duties across Container Apps, AKS Automatic and AKS Standard, the same security baseline written twice in Terraform with tests, and a decision rule short enough to argue with.
Read more →Terraform 1.16 and OpenTofu 1.13: Where They Have Diverged
Twenty-four small configurations run on Terraform 1.16.5 and OpenTofu 1.13.1: which features exist on only one side, which both accept and do differently, whether state moves between them, and what a module author has to do to support both.
Read more →One Contract, Two Clouds: A Network Baseline on AWS and Azure with Terraform
Do not write one Terraform module that hides the cloud. Share the contract instead: the same inputs, outputs, naming and contract tests over an AWS implementation and an Azure implementation, tested on Terraform and OpenTofu with mocked providers, with the cost of the switch-module design measured.
Read more →Testing Infrastructure Code: terraform test, Mock Providers and a Policy Gate in CI
A Terraform module for a clinical-document bucket tested three ways in CI with no cloud account: fourteen unit tests on a mocked provider that pass on Terraform 1.16 and OpenTofu 1.12, ten deliberate defects that the tests must catch, and a policy gate over the JSON plan.
Read more →