Zukko Blog
Guides to Claude Code, Cursor, Codex and the Claude and GPT APIs: setup, token savings and troubleshooting.
Streaming responses — when you actually need stream: true
4 min · · development
stream: true is not for every case. Here is how to read the event stream, where it actually matters, and what usually breaks in it.
503 errors — the model provider is unavailable
2 min · · errors
A 503 says the problem is not yours. How to survive it without losing work, and why streamed errors arrive with a 200.
The model's answer stops mid-sentence — why
2 min · · errors
The answer cuts off mid-word. There are four causes, and one field in the API response tells them apart.