Prompt Engineering (Spring Boot + Spring AI + OpenAI)

A Spring Boot project that demonstrates practical prompt-engineering patterns using Spring AI + OpenAI:

• Strong system prompts + clear output contracts
• Few-shot prompting (format + tone control)
• Self-critique loop (draft → critique → improved)
• Runtime prompt loading from .txt files using a Prompt Loader + Cache (so prompts can be edited without recompiling)

Project Structure

The project contains:

• PromptController (REST API)
• PromptLoader (loads .txt prompts)
• prompts/ folder (system.txt, user.txt)

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Tech Stack

• Java 17
• Spring Boot
• Spring AI (OpenAI)
• Maven

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Prerequisites

1) Java

• Install JDK 17
• In IntelliJ:
  • Project SDK = 17
  • Maven importer JDK = 17

2) OpenAI API key

You need an OpenAI API key available as an environment variable:

Windows (PowerShell):

$env:OPENAI_API_KEY="YOUR_KEY"
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