Is there an example for modifying the chats prompt template?

[Latrolage]

I wanted to use the chatML format but I have no clue how to configure it.

config

  {
    'gsuuon/model.nvim',
    cmd = { 'M', 'Model', 'Mchat' },
    init = function()
      vim.filetype.add({
        extension = {
          mchat = 'mchat',
        }
      })
    end,
    ft = 'mchat',

    keys = {
      {'<C-m>d', ':Mdelete<cr>', mode = 'n'},
      {'<C-m>s', ':Mselect<cr>', mode = 'n'},
      {'<C-m><space>', ':Mchat<cr>', mode = 'n' }
    },

    config = function()
      local function contents_to_strings(messages, system)
        local result = {
          '<|im_start|>' .. system .. '<|im_end|>\n',
        }


        for _, msg in ipairs(messages) do
          table.insert(result, '\n<|im_start|>' .. msg.role .. '\n' .. msg.content .. '<|im_end|>\n' )
        end

        table.insert(result, '<|im_start|>Assistant\n')

        return result
      end

      require('model').setup({
        chats = {
          Qwen = {
            provider = require('model.providers.llamacpp'),
            options = {
              model = 'Qwen2.5-Coder-7B-Instruct-Q4_K_L.gguf',
              args = {
                '-c', 8192,
                '-ngl', 99,
                '-mg', 1,
                '-ts', '0,1',
                '-fa'
              }
            },
            system = 'You are Qwen',
            create = function(input, context) return context.selection and input or '' end,
            run = function(messages, config)
              return {
                prompt = table.concat(
                  contents_to_strings(
                    messages,
                    config.system or 'config.system thing'
                  )
                ),
                '<|im_end|>\n',
                contents_to_strings = contents_to_strings,
              }
            end,
          },
        },
        prompts = {
          Qwen = {
            provider = require('model.providers.llamacpp'),
            options = {
              model = 'Qwen2.5-Coder-7B-Instruct-Q4_K_L.gguf',
              args = {
                '-c', 4096,
                '-ngl', 99,
                '-mg', 1,
                '-ts', '0,1',
                '-fa'
              }
            },
            builder = function(input, context)
              return {
                prompt =
                  '<|im_start|>'
                  .. (context.args or 'You are a helpful assistant') .. '<|im_end|>\n'
                  .. '<|im_start|>user\n'
                  .. input .. '<|im_end|>\n'
                  .. '<|im_start|>assistant\n',
                stops = { '<|im_end|>' }
              }
            end
          }
        },
      })
      require('model.providers.llamacpp').setup({
        binary = '/usr/bin/llama-server',
        models = '~/models/'
      })
    end
  },

I've got this and at least :Mchat qwen opens the menu, but trying to get it to complete just causes this:

to pop up and continue loading forever.

The format here is what i'm trying to make:

<|im_start|>system
{system_prompt}<|im_end|>
<|im_start|>user
{prompt}<|im_end|>
<|im_start|>assistant

[gsuuon]

Do you only see this issue with this model? I'd guess this isn't a format issue. You should get an error if the binary isn't found, but maybe some other error is causing the server to fail to start. Does launching the server separately work?