consider making provider field public

[simonpcouch]

I'm currently working on a package that involves iteration across various elmer Chats provided by the user. Having access to only the Chat object, I'm finding it a bit difficult to extract information about the model/provider to summarize "what model is behind this Chat" without accessing private fields. Would you consider making the provider field public or providing a public method to summarize components of it?

My current approach subsets into that provider and pastes together metadata that seems relevant via a str.Chat method:

library(evalthat)
library(elmer)

str(chat_claude())
#> [1] "Claude claude-3-5-sonnet-latest"
str(chat_openai())
#> Using model = "gpt-4o".
#> [1] "OpenAI gpt-4o"
str(chat_openai(model = "gpt-4o-mini"))
#> [1] "OpenAI gpt-4o-mini"
str(chat_openai(model = "gpt-4o-mini", api_args = list(temperature = 1)))
#> [1] "OpenAI gpt-4o-mini (temperature: 1)"

^{Created on 2024-12-06 with reprex v2.1.1}

[hadley]

Seems reasonable to me. I'll also need to think a bit about how we name providers + models in order to implement #203.