Introduce `chatModels` about langchaingo HOT 6 CLOSED

Ahhh ok. So we'd need to have a look. It's not very self-explanatory haha.

No worries. Which platform @tmc? Discord, Gitter, Matrix?

Sorry I should have indicated, we're in the langchain discord. (we should put this in the README..).

from langchaingo.

I would like to highlight my biggest problem. We have the ChatMessage as follows:

type ChatMessage interface {
	GetText() string
	GetType() ChatMessageType // <- role
}

The openAI API needs separated role and message fields though: https://platform.openai.com/docs/api-reference/chat/create. They are required.

The LLM contract allows passing strings only though.

// LLM is a langchaingo Large Language Model.
type LLM interface {
	Call(prompt string, stopWords []string) (string, error)
	Generate(prompts []string, stopWords []string) ([]*Generation, error)
}

The reference implementation seems to handle it by not using string-only messages:

chat([HumanMessage(content="Translate this sentence from English to French. I love programming.")])

Maybe we could generalize the LLM input to be a BaseMessage as well, and then strongly type it for all implementations? (Normal LLMs just get a text as input, chat role and text etc.)

What are everyone's thoughts? (@tmc?)

from langchaingo.

What's the type based upon?

That's just a copy of the concept from https://github.com/hwchase17/langchain/blob/master/langchain/schema.py#L88

See "role" here: https://github.com/hwchase17/langchain/blob/master/langchain/schema.py#L106 (and used here: https://github.com/hwchase17/langchain/blob/master/langchain/schema.py#L33)

@ChristianSch sorry I missed your follow-up comment here. Please feel free to join us in the langchain chat in the #langchain-go channel.

from langchaingo.

Hmm. I think we need to think through if “type” is sufficiently distinct from “role”. We have the role field on the GenericChatMessage struct.

from langchaingo.

What's the type based upon?

from langchaingo.

Ahhh ok. So we'd need to have a look. It's not very self-explanatory haha.

No worries. Which platform @tmc? Discord, Gitter, Matrix?

from langchaingo.