A note on a pattern I keep running into in Elixir API clients: status-code checks and body parsing live in code after Tesla.request, instead of inside the middleware chain itself. It looks fine from the caller’s side, but it silently breaks observability. A 500 translated to {:error, _} looks like a successful request to Tesla, so :telemetry and anything else wired up to the request lifecycle stay quiet.

https://dev.to/arturplysiuk/youre-probably-underusing-middleware-for-http-response-handling-1djf