60 lines
2.1 KiB
TypeScript
60 lines
2.1 KiB
TypeScript
import { RunnableSequence, RunnableMap } from '@langchain/core/runnables';
|
|
import ListLineOutputParser from '../lib/outputParsers/listLineOutputParser';
|
|
import { PromptTemplate } from '@langchain/core/prompts';
|
|
import formatChatHistoryAsString from '../utils/formatHistory';
|
|
import { BaseMessage } from '@langchain/core/messages';
|
|
import { BaseChatModel } from '@langchain/core/language_models/chat_models';
|
|
import { ChatOpenAI } from '@langchain/openai';
|
|
|
|
const suggestionGeneratorPrompt = `
|
|
- You are an AI suggestion generator for an AI powered search engine.
|
|
- You will be given a conversation below.
|
|
- You need to generate 4-5 suggestions based on the conversation.
|
|
- The suggestion should be relevant to the conversation that can be used by the user to ask the chat model for more information.
|
|
- You need to make sure the suggestions are relevant to the conversation and are helpful to the user. Keep a note that the user might use these suggestions to ask a chat model for more information.
|
|
- Make sure the suggestions are medium in length and are informative and relevant to the conversation.
|
|
|
|
- Provide these suggestions separated by newlines between the XML tags <suggestions> and </suggestions>.
|
|
|
|
### For example:
|
|
|
|
<suggestions>
|
|
Tell me more about SpaceX and their recent projects
|
|
What is the latest news on SpaceX?
|
|
Who is the CEO of SpaceX?
|
|
</suggestions>
|
|
|
|
### Conversation:
|
|
{chat_history}
|
|
`;
|
|
|
|
type SuggestionGeneratorInput = {
|
|
chat_history: BaseMessage[];
|
|
};
|
|
|
|
const outputParser = new ListLineOutputParser({
|
|
key: 'suggestions',
|
|
});
|
|
|
|
const createSuggestionGeneratorChain = (llm: BaseChatModel) => {
|
|
return RunnableSequence.from([
|
|
RunnableMap.from({
|
|
chat_history: (input: SuggestionGeneratorInput) =>
|
|
formatChatHistoryAsString(input.chat_history),
|
|
}),
|
|
PromptTemplate.fromTemplate(suggestionGeneratorPrompt),
|
|
llm,
|
|
outputParser,
|
|
]);
|
|
};
|
|
|
|
const generateSuggestions = (
|
|
input: SuggestionGeneratorInput,
|
|
llm: BaseChatModel,
|
|
) => {
|
|
(llm as unknown as ChatOpenAI).temperature = 0;
|
|
const suggestionGeneratorChain = createSuggestionGeneratorChain(llm);
|
|
return suggestionGeneratorChain.invoke(input);
|
|
};
|
|
|
|
export default generateSuggestions;
|