Store and Reuse Prompt Outputs Across Evaluation Runs

This promptfoo configuration example demonstrates how to store outputs from one prompt step and reuse them as inputs in subsequent steps. The example is named "Store And Reuse Outputs" and provides a working configuration you can run and customize.

Use this pattern when you want to explore how to configure promptfoo to pass outputs between steps in a workflow. Use it as a starting point for building evaluations where later prompts may need access to earlier outputs.

Do not use this if you need a simple single-prompt evaluation or if your prompts are independent and don't require output storage between steps.

You provide your OPENAI_API_KEY environment variable and can edit the promptfooconfig.yaml file to customize the configuration.

You receive evaluation results that you can view through the promptfoo interface after running the evaluation.

Initialize the example with:

npx promptfoo@latest init --example config-store-and-reuse-outputs
cd config-store-and-reuse-outputs

Set your OPENAI_API_KEY environment variable, then edit the promptfooconfig.yaml file to customize your workflow. Run the evaluation:

promptfoo eval

After evaluation completes, view the results by running promptfoo view.

This example is for prompt engineers and developers who want to learn how to configure output storage and reuse in promptfoo. It provides a concrete starting point for understanding this configuration pattern. If you're testing simple single-prompt scenarios, a basic promptfoo configuration without output storage would be more appropriate.