Option 1: Provide your own prompts for data preparation - Amazon Bedrock
This documentation is a draft for private preview for regions in the AWS European Sovereign Cloud. Documentation content will continue to evolve. Published: January 1, 2026.

Option 1: Provide your own prompts for data preparation

Collect your prompts and store them in .jsonl file format. Each record in the JSONL must use the OpenAI chat completion format in the following structure:

  • In the messages field, include the user, system or assistant role containing the input prompt provided to the model.

  • [Optional] You can add fields used by grader Lambda for grading.

Example format:

{
  "messages": [
    {"role": "system", "content": "You are a helpful assistant"},
    {"role": "user", "content": "What is machine learning?"}
  ],
  "reference_answer": "Machine learning is a subset of artificial intelligence that enables computers to learn and make decisions from data without being explicitly programmed."
}