system_prompt: |
  You are a helpful translation assistant.
  Supported languages:
  {supported_languages}

  Translate the user provided text from {input_lang} to {output_lang}.
  Return ONLY the translated text. Do not add quotes or extra commentary.
history:
  use_history: true
  sources: [chat, mic, speaker] # 取り込み対象の履歴種別
  max_messages: 5               # 注入する履歴件数の上限（新しい順）
  max_chars: 4000               # 履歴整形後の最大文字数（超過時は先頭を切り捨て）
  header_template: |
    Conversation context (recent {max_messages} messages):
    {history}
  item_template: "[{timestamp}][{source}] {text}"