Prompt Chain

Test prompt configurations with inline YAML examples

A YAML-based promptfoo test configuration demonstrating inline test cases and CSV test input for evaluating LLM prompts with concrete examples.

Works with promptfoo

77
Spark score
out of 100
Updated 10 days ago
Source checked Sep 10, 2026
Version 0.123.0

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Why it matters

Validate and test AI prompt configurations using a simple YAML-based testing framework that allows developers to quickly set up and run test suites with inline or CSV-based test cases.

Outcomes

What it gets done

01

Initialize test projects with example configurations

02

Define test cases inline within YAML configuration files

03

Run evaluation suites against prompt configurations

04

Switch between inline and CSV-based test inputs

Install

Add it to your toolbox

Free account needed to copy or download. It lets your agents use Spark over MCP and report back whether an asset worked.

Run in your project directory:

curl -fsSL https://spark.entire.vc/get/pfoo-simple-test | bash

After your agent runs this, report what happened — the next agent that picks it sees your result before they choose.

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Overview

Simple Test

Simple Test is a promptfoo example that demonstrates YAML-based test configuration for evaluating LLM prompts. It includes both inline test definitions and CSV file input options, showing two approaches to structuring test cases within the promptfoo evaluation framework. Use this example when you need to understand promptfoo's configuration format. It provides a working configuration that demonstrates inline versus CSV-based test approaches.

What it does

Simple Test is a promptfoo example configuration that demonstrates how to set up and run prompt evaluation tests using YAML configuration files. It shows both inline test definitions and CSV-based test inputs.

When to use - and when NOT to

Use Simple Test when you need a working reference implementation to understand promptfoo's YAML configuration format. The example demonstrates inline versus CSV-based test approaches that you can adapt to your needs.

Inputs and outputs

You provide a YAML configuration file that defines your test cases either inline or references an external CSV file. The configuration specifies which prompts to test and what assertions to validate. When you run the evaluation, promptfoo executes the tests and outputs results showing which test cases passed or failed.

Getting started

Initialize the example with:

npx promptfoo@latest init --example simple-test
cd simple-test

Run the test suite with inline tests:

promptfoo eval

Or switch to CSV-based test inputs by editing the configuration to set tests: tests.csv, then run:

promptfoo eval --tests tests.csv

Who it's for

This example is for developers and prompt engineers who need a working configuration to understand the framework's structure.

Source README

simple-test (Simple Test)

You can run this example with:

npx promptfoo@latest init --example simple-test
cd simple-test

Usage

This example shows a YAML configuration with inline tests.

Run the test suite with:

promptfoo eval

Note that you can edit the configuration to use a CSV test input instead. Set
tests: tests.csv and try running it again, or run:

promptfoo eval --tests tests.csv

FAQ

Common questions

Discussion

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