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The Send facade is a struct, its methods return a fake Void, and every sender secretly marks the response started before writing a byte. A tour of the response surface the deep dive skipped - files, ranges, redirects, interceptors and all. Part 2 of FastEndpoints — The Missing Chapters.
Every downstream response is buffered into a UTF-16 string and re-encoded on the way out, so binary bodies corrupt silently behind a plausible status code and a recomputed Content-Length.
AssignVehicleToOrder is the one command in Pacco that cannot finish alone - Orders calls Vehicles, then Pricing, and Pricing calls Customers, a synchronous enrichment chain on the write path of a messaging estate. At the end of it sits a deliberately bus-less calculator with a loyalty ladder, an unassigned Id and a discount logged in dollars.
DShop's gateway answers a write with 202 Accepted and a header pointing at an operation that hasn't happened yet. Reading the contract shows a clean async-REST design - and two small bugs that undercut it.
DShop.Common's error middleware maps every exception to HTTP 400, computes a safe message, then throws it away and serialises the raw exception text to the caller.
Pick the one closest to the role. Each is two pages and carries the same facts.
Applied AI
Agentic AI & Cloud Engineer · multi-agent systems, RAG and MCP on AWS
Cloud & .NET
C#, .NET 10 and ASP.NET Core microservices on AWS and Azure · Terraform & AWS CDK
Data Engineering
AWS lakehouse · Kinesis, Glue (PySpark), Apache Iceberg, Lake Formation
Everything
All three domains, with the standout project from each