| {%- if messages[0]['role'] == 'system' %} | |
| {%- set system_message = messages[0]['content'] %} | |
| {%- set loop_messages = messages[1:] %} | |
| {%- else %} | |
| {%- set loop_messages = messages %} | |
| {%- endif %} | |
| {{- bos_token }} | |
| {%- for message in loop_messages %} | |
| {%- if (message['role'] == 'user') != (loop.index0 % 2 == 0) %} | |
| {{- raise_exception('After the optional system message, conversation roles must alternate user/assistant/user/assistant/...') }} | |
| {%- endif %} | |
| {%- if message['role'] == 'user' %} | |
| {%- if loop.last and system_message is defined %} | |
| {{- '[INST] ' + system_message + '\n\n' + message['content'] + '[/INST]' }} | |
| {%- else %} | |
| {{- '[INST] ' + message['content'] + '[/INST]' }} | |
| {%- endif %} | |
| {%- elif message['role'] == 'assistant' %} | |
| {{- ' ' + message['content'] + eos_token}} | |
| {%- else %} | |
| {{- raise_exception('Only user and assistant roles are supported, with the exception of an initial optional system message!') }} | |
| {%- endif %} | |
| {%- endfor %} | |