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// adapted from https://huggingface.co/TheBloke/Llama-2-13B-chat-GPTQ/discussions/5
export function createLlamaPrompt(messages: Array<{ role: string, content: string }>) {
const B_INST = "[INST]", E_INST = "[/INST]";
const B_SYS = "<<SYS>>\n", E_SYS = "\n<</SYS>>\n\n";
const BOS = "<s>", EOS = "</s>";
const DEFAULT_SYSTEM_PROMPT = "You are a helpful, respectful and honest assistant. Always answer as helpfully as possible, while being safe. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense, or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.";
if (messages[0].role != "system"){
messages = [
{role: "system", content: DEFAULT_SYSTEM_PROMPT}
].concat(messages);
}
messages = [{role: messages[1].role, content: B_SYS + messages[0].content + E_SYS + messages[1].content}].concat(messages.slice(2));
let messages_list = messages.map((value, index, array) => {
if (index % 2 == 0 && index + 1 < array.length){
return `${BOS}${B_INST} ${array[index].content.trim()} ${E_INST} ${array[index+1].content.trim()} ${EOS}`
}
return '';
})
messages_list.push(`${BOS}${B_INST} ${messages[messages.length-1].content.trim()} ${E_INST}`)
return messages_list.join('');
} |