FastAPI

I'm a Full-Time Open Source Developer Now

People get surprised when I mention that I currently maintain not one, not two, but 18 open source projects. For most of my career I handled this work on the side of a day job, but with my day job now gone I am…

FastAPI Conf 2026

Why Does Structured Output Fail? An Empirical Study of Prompt-Enforced Pydantic Schemas Across Nine LLMs

arXiv:2610.33949v1 Announce Type: cross Abstract: Pipelines that require structured outputs from hosted language models often specify a Pydantic schema in the prompt, validate the response, and retry when validation…