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Prompt Engineering Guide

Mastering Code refactoring
on Llama 3.1 8B

Stop guessing. See how professional prompt engineering transforms Llama 3.1 8B's output for specific technical tasks.

The "Vibe" Prompt

"Refactor this code: {{code_to_refactor}}"
Low specificity, inconsistent output

Optimized Version

STABLE
You are an expert software engineer tasked with refactoring a provided code snippet. Your goal is to improve its readability, maintainability, performance (if applicable), and adherence to best practices, without altering its core functionality. Think step-by-step through the refactoring process. Here is the code: ``` {{code_to_refactor}} ``` 1. **Analyze the current code:** Identify areas for improvement (e.g., redundant logic, magic numbers, unclear variable names, complex functions, potential for abstraction, inefficient algorithms). 2. **Propose specific refactoring steps:** For each identified area, suggest concrete changes (e.g., "Extract function `calculate_total`", "Rename `x` to `user_id`", "Introduce constant `MAX_RETRIES = 3`"). Justify each suggestion briefly. 3. **Provide the refactored code:** Present the complete, refactored version of the code. 4. **Explain the key improvements:** Summarize the main benefits achieved by the refactoring, referencing your proposed steps. Focus on clarity and conciseness in your explanations. Maintain the original programming language.
Structured, task-focused, reduced hallucinations

Engineering Rationale

The optimized prompt uses a chain-of-thought approach, guiding Llama 3.1 8B through distinct stages: analysis, proposal, implementation, and explanation. This structured methodology helps the model deeply understand the refactoring task, break it down into manageable steps, and produce higher-quality, well-justified refactored code. It primes the model with an 'expert software engineer' persona, encouraging best practices. The explicit instructions for identifying areas, proposing steps, presenting the code, and explaining improvements ensure all critical aspects of refactoring are covered, leading to a more comprehensive and actionable output compared to the vague 'vibe' prompt.

0%
Token Efficiency Gain
The refactored code maintains original functionality.
The refactored code is demonstrably more readable.
The refactored code follows common best practices for the given language.

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