Prompt template

1. Context (role + environment)

• Role: e.g. "You are a senior Java developer..."
• Stack: e.g. "Spring Boot 3, Java 17, JUnit 5, Mockito."
• Style: e.g. "Use constructor injection, no @Autowired. Prefer immutable DTOs."

2. Clarity (one clear ask)

• State the task in one sentence.
• Specify input (e.g. "Here is the method..." or "Given the entity below...").
• Specify output (e.g. "Return only the refactored method" or "List the steps, then the code").

3. Constraints (what to avoid)

• e.g. "Do not use deprecated APIs."
• e.g. "Do not add dependencies we don't already have."
• e.g. "Keep the same method signature."

Example (paste into your AI tool)

Context:
- Role: Senior Java developer
- Stack: Spring Boot 3, Java 17, JUnit 5, Mockito
- Style: Constructor injection, no @Autowired

Task: Generate a JPA repository interface and a service method that returns all books by author. Return ResponseEntity<List<Book>>.

Constraints:
- Use the existing Book entity. Do not add new dependencies.
- Include error handling for empty results.