{% if existsIn(ctx, "system_prompt") %}
{ "role": "system", "content": {{ tojson(ctx.system_prompt) }} },
{% endif %}
{% for msg in ctx.history %}
  {% set tcalls = filter_by_type(msg.content_blocks, "tool_use") %}
  {% set tresults = filter_by_type(msg.content_blocks, "tool_result") %}
  {% if length(tresults) > 0 %}
    {% for b in tresults %}
    {
      "role": "tool",
      "content": {{ tojson(b.content) }}
      {% if b.name != "" %}
      , "tool_name": {{ tojson(b.name) }}
      {% endif %}
    },
    {% endfor %}
  {% else %}
  {
    "role": {{ tojson(msg.role) }},
    "content": {{ tojson(msg.content) }}
    {% if length(tcalls) > 0 %}
    , "tool_calls": [
      {% for b in tcalls %}
      { "type": "function", "function": { "name": {{ tojson(b.name) }}, "arguments": {{ tojson(b.input) }} } },
      {% endfor %}
    ]
    {% endif %}
    {% if existsIn(msg, "images") %}
    , "images": [
      {% for img in msg.images %}
      {{ tojson(img.data) }},
      {% endfor %}
    ]
    {% endif %}
  },
  {% endif %}
{% endfor %}