AWS Emulator went generally available on 11 November 2026. Ten questions, one CI run against release 1.0.341: install and signature check, start-up cost, CLI, boto3 and Terraform, a 22-experiment comparison with moto, Lambda, service reach, the published fidelity scores, IAM, state, and a pipeline recipe.
Read more →C# 15 Union Types in a Real Domain Model: Dispensed, Rejected or Referred
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 →Step Functions as Agent Tools: Putting the Rules Where a Prompt Cannot Move Them
Step Functions workflows can now be exposed to agents as tools through AgentCore Gateway. What the connector offers, how to write a workflow that is safe to hand to a model, where the IAM boundary sits, and eighteen scenarios tested on Step Functions Local.
Read more →Multi-Region Active-Active on Azure for a .NET API: What Happens to the Write You Acknowledged
Routing two Azure regions is configuration. Deciding what happens to two writes to one record is design. Four write strategies compared on one simulated outage, what Cosmos DB does with a conflict, idempotent retries across regions, readiness probes for Front Door, and the global tier in Terraform.
Read more →Lambda Web Functions: When a Function Becomes a Web Server
AWS Lambda Web Functions run an ordinary HTTP server, serve many requests per environment and bill by CPU time. What the contract is, what the billing model rewards and punishes, with a measured server and a cost model checked against AWS’s own examples, and where it sits against function URLs, API Gateway and App Runner.
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