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FastEndpoints binds a single request DTO from JSON, form, route, query, claims, headers, cookies and permissions - in that order, with compiled setters cached per DTO type. Reading the binder explains every binding surprise I have ever hit. Part 4 of FastEndpoints in Depth.
AddFastEndpoints never asks you to register an endpoint. Reading the discovery code shows how a reflection scan over five interfaces becomes a validated endpoint catalogue - and which mistakes it turns into startup crashes on purpose. Part 2 of FastEndpoints in Depth.
Every FastEndpoints route is mapped as a Minimal API whose handler returns the same singleton IResult - and that one weird trick is the door into the whole per-request pipeline. Part 3 of FastEndpoints in Depth.
Controllers grow sideways and Minimal APIs grow into soup. FastEndpoints bets on a third shape - one class per endpoint - and this series reads its source to see how the bet is implemented. Part 1 of FastEndpoints in Depth.
