# auto (final_output_only)
sequence
  optional `<|open|>response<|sep|>`
  tag `` text excluding [`<|open|>`, `<|close|>`, `<|end_of_msg|>`] `<|close|>response<|sep|>`
  optional
    tag `<|open|>tools<|sep|>` .. `<|close|>tools<|sep|>`
      tags_with_separator `` at_least_one
        tag `<|open|>call tool="get_weather" index="` .. `<|close|>call<|sep|>`
          sequence
            /[1-9][0-9]*/
            `"<|sep|>`
            or
              tag `<|open|>argument key="location" type="string"<|sep|>` text excluding [`<|close|>argument<|sep|>`, `<|close|>call<|sep|>`] `<|close|>argument<|sep|>`
              tag `<|open|>json type="object"<|sep|>` json({ location: string }) `<|close|>json<|sep|>`
        tag `<|open|>call tool="add" index="` .. `<|close|>call<|sep|>`
          sequence
            /[1-9][0-9]*/
            `"<|sep|>`
            or
              sequence
                tag `<|open|>argument key="y" type="number"<|sep|>` json(number) `<|close|>argument<|sep|>`
                tag `<|open|>argument key="x" type="number"<|sep|>` json(number) `<|close|>argument<|sep|>`
                tag `<|open|>argument key="items" type="array"<|sep|>` json(string[]) `<|close|>argument<|sep|>`
              tag `<|open|>json type="object"<|sep|>` json({ y: number, x: number, items: string[] }) `<|close|>json<|sep|>`
  optional `<|close|>message<|sep|>`

# required (final_output_only)
sequence
  optional `<|open|>response<|sep|>`
  tag `` text excluding [`<|open|>`, `<|close|>`, `<|end_of_msg|>`] `<|close|>response<|sep|>`
  tag `<|open|>tools<|sep|>` .. `<|close|>tools<|sep|>`
    tags_with_separator `` at_least_one
      tag `<|open|>call tool="get_weather" index="` .. `<|close|>call<|sep|>`
        sequence
          /[1-9][0-9]*/
          `"<|sep|>`
          or
            tag `<|open|>argument key="location" type="string"<|sep|>` text excluding [`<|close|>argument<|sep|>`, `<|close|>call<|sep|>`] `<|close|>argument<|sep|>`
            tag `<|open|>json type="object"<|sep|>` json({ location: string }) `<|close|>json<|sep|>`
      tag `<|open|>call tool="add" index="` .. `<|close|>call<|sep|>`
        sequence
          /[1-9][0-9]*/
          `"<|sep|>`
          or
            sequence
              tag `<|open|>argument key="y" type="number"<|sep|>` json(number) `<|close|>argument<|sep|>`
              tag `<|open|>argument key="x" type="number"<|sep|>` json(number) `<|close|>argument<|sep|>`
              tag `<|open|>argument key="items" type="array"<|sep|>` json(string[]) `<|close|>argument<|sep|>`
            tag `<|open|>json type="object"<|sep|>` json({ y: number, x: number, items: string[] }) `<|close|>json<|sep|>`
  optional `<|close|>message<|sep|>`

# named (final_output_only)
sequence
  optional `<|open|>response<|sep|>`
  tag `` text excluding [`<|open|>`, `<|close|>`, `<|end_of_msg|>`] `<|close|>response<|sep|>`
  tag `<|open|>tools<|sep|>` .. `<|close|>tools<|sep|>`
    tags_with_separator `` at_least_one
      tag `<|open|>call tool="get_weather" index="` .. `<|close|>call<|sep|>`
        sequence
          /[1-9][0-9]*/
          `"<|sep|>`
          or
            tag `<|open|>argument key="location" type="string"<|sep|>` text excluding [`<|close|>argument<|sep|>`, `<|close|>call<|sep|>`] `<|close|>argument<|sep|>`
            tag `<|open|>json type="object"<|sep|>` json({ location: string }) `<|close|>json<|sep|>`
  optional `<|close|>message<|sep|>`