Prompt Engineer Toolkit

Evaluate, version, and diff AI prompts with Python scripts.

Updated Mar 4, 2026

Search Tags:#version control #prompt engineering #prompt management #a/b testing #llm optimization #ai workflows

Ready to run

npx skills add https://github.com/Tonybleything76/more-claude-skills --skill prompt-engineer-toolkit-tonybleything76

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Prompt Engineer Toolkit
Source: https://github.com/Tonybleything76/more-claude-skills/tree/main/marketing-skill/prompt-engineer-toolkit
Command: npx skills add https://github.com/Tonybleything76/more-claude-skills --skill prompt-engineer-toolkit-tonybleything76

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill provides a robust system for managing, testing, and versioning prompts, ensuring consistent and high-quality AI outputs in production environments.

Core Features & Use Cases

A/B Prompt Testing: Evaluate prompt variants against structured test cases to identify the best performer.
Prompt Versioning: Track prompt history, including author, timestamp, and change notes, with diff capabilities.
Use Case: When updating a critical customer support prompt, use this Skill to A/B test the new version against the old one using a suite of representative customer queries, ensuring the new prompt doesn't degrade performance or introduce harmful responses before deployment.

Quick Start

Use the prompt engineer toolkit to add a new version of the 'support_classifier' prompt.

Frequently Asked Questions about Prompt Engineer Toolkit

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

FAQPage Schema

How do I manage prompt versioning for production LLM applications?▼

Prompt versioning tracks AI prompt history, including author, timestamp, and change notes, using local JSONL stores to ensure repeatable quality assurance and auditable change management in production LLM applications.

What is the best way to A/B test AI prompts?▼

A/B testing AI prompts evaluates prompt variants against structured test cases to identify the best performer. This ensures new prompt versions do not degrade performance or introduce harmful responses before deployment.

How does regression testing for prompt engineering work?▼

Regression testing for prompt engineering automates the evaluation of prompt updates against a suite of representative queries, preventing performance degradation and ensuring consistent, high-quality AI outputs.

Do I need Python scripts to track prompt history and diff changes?▼

Yes, Python scripts automate prompt evaluation, versioning, and diffing. They address the need for repeatable prompt quality assurance, regression testing, and auditable change management in production environments.

Can I use local JSONL stores for prompt management in AI workflows?▼

Yes, local JSONL stores are integrated for prompt history and versioning. This allows you to track prompt changes, diff versions, and maintain auditable change management directly within your AI workflows.

When do I need prompt diffing in LLM optimization?▼

Prompt diffing is needed when updating critical prompts, allowing you to compare new versions against old ones to ensure updates do not degrade performance or introduce harmful responses before deployment.