fine-tuning-data-generator

Generate synthetic fine-tuning datasets in ChatML JSONL format for language models.

22|2|Updated Nov 22, 2025
One-click install
npx skills add https://github.com/markpitt/claude-skills --skill fine-tuning-data-generator
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: fine-tuning-data-generator
Source: https://github.com/markpitt/claude-skills/tree/main/skills/fine-tuning-data-generator
Command: npx skills add https://github.com/markpitt/claude-skills --skill fine-tuning-data-generator

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill helps you create comprehensive fine-tuning datasets in ChatML format for large language model training by planning, generation, validation, and framework integration.

Core Features & Use Cases

  • End-to-end data generation workflow: requirements gathering, generation plan, data creation, validation, and integration guidance.
  • Supports multiple domains (customer support, code generation, technical writing, data analysis, creative writing, education).
  • Validation tools and code examples to ensure dataset quality and compatibility with Unsloth, Axolotl, and Hugging Face.
  • Output-ready JSONL ChatML data with dataset metadata.

Quick Start

Start by outlining your dataset requirements and ask Claude to generate a generation plan and initial dataset.

Frequently Asked Questions about fine-tuning-data-generator

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

FAQPage Schema
How do I generate synthetic fine-tuning data in ChatML format for language models?

ChatML format synthetic data generation involves structuring multi-turn conversations as JSONL files with role-based message pairs. This Skill automates the end-to-end workflow: requirements gathering, generation planning, diverse example creation, strict JSONL formatting, and validation to produce deployment-ready datasets for Unsloth, Axolotl, and Hugging Face frameworks.

Can I create domain-specific fine-tuning datasets for customer support and code generation?

Yes. This Skill supports multiple domains including customer support, code generation, Q&A, technical writing, data analysis, and education. It tailors generation plans and multi-turn examples to your specific domain requirements, then outputs validated ChatML JSONL data ready for framework integration.

What validation tools are included to ensure fine-tuning dataset quality?

The Skill provides built-in validation tooling to verify ChatML JSONL formatting compliance, dataset structure integrity, and compatibility with target frameworks. Validation ensures your synthetic data meets quality standards before deployment to Unsloth, Axolotl, or Hugging Face training pipelines.

How do I integrate generated fine-tuning data with Unsloth, Axolotl, or Hugging Face?

The Skill includes framework integration guidance and code examples for all three platforms. After generating and validating your ChatML JSONL dataset, follow the provided instructions to load data into your chosen framework and configure training parameters.

What's the workflow for planning and generating a complete fine-tuning dataset?

The workflow follows five stages: requirements gathering (define domain and task scope), generation-plan creation (specify data characteristics), diverse multi-turn example generation (produce examples), strict JSONL formatting (structure output), and validation (verify quality). This ensures systematic, high-quality synthetic dataset creation.

Can I automate validation and ensure my fine-tuning data meets ChatML standards?

Yes. The Skill includes automated validation tooling that checks ChatML JSONL formatting, dataset metadata, and framework compatibility. Automation reduces manual QA effort and catches structural issues before training begins.