[Tool] Support manual function calling #527
Merged
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This PR supports using function calling with only
system,user,assistant,toolmessages, without using OpenAI fieldstoolsortool_calls. This provides users with the most flexibility for each model, but users need to parse the output on their own.The counterpart to "manual function calling" is "function calling with OpenAI style". The difference between
function-calling-manualandfunction-calling-openaiis explained inexamples/function-calling/README.md.Examples of using Llama3.1 and Hermes2 are added to
examples/function-calling/function-calling-manual, recreating the official usecase examples:To support this, we make the following changes to the internal code:
ChatConfig.conv_templateis a string, as we expect all mlc-chat-config.json to be updated (related to [Announcement] Breaking changes regarding conversation template #344)offsetfromConvTemplateConfig, removeConversationdefined ingetConversation(),mlc-chat-config.jsonto the testing files (e.g. we did this for Llama3.1, Hermes2, and gorilla)tool, in addition touser; support messages fromtool