From the cookbook's using_citations.ipynb. Pairs the Claude Citations API with a short, focused system prompt to ground answers in help-center documents. Cited spans are returned in response.content[*].citations so you can render verifiable links.
User message contains the help-center documents (as type: "document" blocks with citations.enabled: true) followed by:
Here is the user's question: I just checked out, where is my order tracking number? Track package is not available on the website yet for my order.
Source: https://github.com/anthropics/anthropic-cookbook/blob/main/misc/using_citations.ipynb