unsloth-fft

Perform full fine-tuning on large language models with Unsloth libraries.

Updated Aug 27, 2026
One-click install
npx skills add https://github.com/cuba6112/skillfactory --skill unsloth-fft
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: unsloth-fft
Source: https://github.com/cuba6112/skillfactory/tree/main/skills/unsloth-fft
Command: npx skills add https://github.com/cuba6112/skillfactory --skill unsloth-fft

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires unsloth, torch, transformers, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill enables efficient and memory-optimized Full Fine-Tuning (FFT) of large language models, allowing for 100% exact weight updates without the limitations of low-rank adapters.

Core Features & Use Cases

  • 100% Exact Weight Updates: Modifies all model weights for comprehensive behavior changes.
  • Optimized Gradient Checkpointing: Significantly reduces VRAM usage, enabling larger batch sizes.
  • Memory Management: Utilizes adamw_8bit and gradient accumulation for efficient training on limited hardware.
  • Use Case: Ideal for base model pre-training or when significant model-wide behavioral shifts are required, and sufficient VRAM is available.

Quick Start

Initialize a full fine-tuning session for the 'unsloth/llama-3-8b' model using the provided setup script.

Frequently Asked Questions about unsloth-fft

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

FAQPage Schema
How do I do full fine-tuning on large language models without running out of VRAM?

Full fine-tuning (FFT) performs 100% exact weight updates across all model parameters, enabling comprehensive behavioral shifts, whereas low-rank adapters only apply limited modifications. FFT is ideal for base model pre-training when sufficient VRAM is available.

Can I use Unsloth for base model pre-training instead of just fine-tuning?

Yes, Unsloth can be used for base model pre-training. The Skill's full fine-tuning capabilities facilitate 100% exact weight updates, making it applicable for both extensive model behavior modification and base model pre-training.

What is the best way to update all weights in an LLM instead of using low-rank adapters?

Full fine-tuning (FFT) with Unsloth is the best way to update all weights, as it performs 100% exact weight updates for comprehensive behavior changes. This avoids the limitations of low-rank adapters while using gradient checkpointing for memory efficiency.

Do I need gradient checkpointing and 8-bit optimizers for memory optimization during FFT?

Yes, gradient checkpointing and 8-bit optimizers like adamw_8bit are required for memory optimization during FFT. They significantly reduce VRAM usage and enable efficient training on limited hardware alongside gradient accumulation techniques.

Does full fine-tuning with Unsloth work with PyTorch and Hugging Face Transformers?

Yes, full fine-tuning with Unsloth works with PyTorch and Hugging Face Transformers. These are core dependencies required to execute memory-optimized training scripts and perform 100% exact weight updates on large language models.