Your AI Feature Doesn't Fail at the Model. It Fails at the Handoff

说明与用途

自动化方案：使用 FastAPI 代理验证身份、限制请求大小、流式响应，并通过边界测试防止 AI 功能的交接失败。

问题

AI features often fail not because of the model but due to integration layers such as auth, payload limits, and streaming handling.

结果

The proxy successfully prevents handoff failures, ensuring the model never receives malformed requests and improving overall reliability.

工作流

• Deploy a FastAPI proxy that checks auth header and message count.
• Configure the proxy to forward requests to the upstream model and stream responses back.
• Create a rehearsal script that sends test requests for missing auth, wrong token, oversized body, and happy path.
• Run the rehearsal script to verify each boundary returns the expected status code.
• Iterate on proxy logic until all tests pass.
• Integrate the proxy into the production stack.
• Monitor for boundary failures in production logs.

证据

The model had done its job flawlessly, and the handoff had not.

来源

Here is the smallest slice I could build that still crosses every boundary.

来源