Implement claude citation api for RAG

[ncoop57]

Anthropic released a new Citation API for claude. You can find a discussion of it here: https://simonwillison.net/2025/Jan/24/anthropics-new-citations-api/

And the official docs here: https://docs.anthropic.com/en/docs/build-with-claude/citations

Adding this to claudette would allow for improved RAG with citation grounding and open many interesting usecases for users. It is also officially supported by anthropic and would allow for us to say we continue to keep up with the official anthropic api

[galopyz]

Hi, do you need help with this?
It says ohmeow was assigned and unassigned.
If nobody's working on this, I would be happy to work on this one.

[ncoop57]

Yes, we would love help on this! @galopyz!

[galopyz]

Hi Nathan,

I have to create a message with "citations": {"enabled": True}. I think I should modify msglm, rather than creating a function to return a dictionary here. Because Image inputs and caching also needs special messages, and they are done through mk_msg.

What do you think?

[galopyz]

@ncoop57 Can you give me your opinion on this? Thanks!

[ncoop57]

@galopyz that makes total sense!! Good idea 🤓🤓

[ncoop57]

@galopyz you wanna add an example to claudette docs that uses the new msglm citation msg type?

[galopyz]

@ncoop57 Sounds good! 👍