prompt-engineer

Design and optimize LLM prompts with evaluation frameworks and few-shot learning.

9|2|Updated Jan 29, 2026
One-click install
npx skills add https://github.com/stephanj/claude-code-collections --skill prompt-engineer-stephanj
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: prompt-engineer
Source: https://github.com/stephanj/claude-code-collections/tree/main/skills/prompt-engineer
Command: npx skills add https://github.com/stephanj/claude-code-collections --skill prompt-engineer-stephanj

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires tiktoken, scikit-learn, evaluate, and includes references (resource) components.

What problem does it solve?

This skill addresses the challenge of inconsistent or inefficient LLM performance by providing a systematic framework for prompt design, testing, and iterative optimization.

Core Features & Use Cases

  • Prompt Optimization: Refine instructions to improve accuracy, reduce latency, and lower token costs.
  • Evaluation Frameworks: Build automated test suites and use LLM-as-a-judge to measure performance against ground truth.
  • Advanced Techniques: Implement structured outputs, chain-of-thought, and few-shot learning to handle complex reasoning tasks.

Quick Start

Use the prompt-engineer skill to design a system prompt for a customer support agent that ensures consistent tone and accurate product information.

Frequently Asked Questions about prompt-engineer

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I optimize LLM prompts to improve accuracy and reduce token costs?

Build evaluation frameworks and automated test suites using LLM-as-a-judge to measure performance against ground truth. This systematic testing approach ensures reliability and tracks version control to validate prompt improvements over time.

What is the best way to implement chain-of-thought and few-shot learning for complex reasoning tasks?

Implement structured output generation alongside chain-of-thought and few-shot learning to handle complex reasoning tasks. This combination ensures consistent, reliable results across diverse application domains by enforcing systematic processing logic.

How do I build automated test suites to evaluate LLM prompt performance?

Build automated test suites using evaluation frameworks that implement LLM-as-a-judge to measure performance against ground truth. This ensures reliability and enables systematic testing and version control for production environments.

Does prompt engineering work with structured output generation for production environments?

Yes, structured output generation works with prompt engineering to ensure reliability and cost-efficiency in production environments. It implements systematic testing and version control to maintain consistent model performance across diverse application domains.

Why does my LLM prompt produce inconsistent results across different application domains?

Inconsistent LLM performance occurs when prompts lack systematic design, testing, and iterative optimization. Address this by using evaluation frameworks, few-shot learning, and structured outputs to handle complex reasoning and ensure consistent results.

Do I need scikit-learn and tiktoken to design high-performance LLM prompts?

Using scikit-learn and tiktoken supports prompt design by enabling token counting and performance evaluation. These dependencies facilitate systematic testing and evaluation frameworks to maximize model performance and optimize token costs.