peft-fine-tuning

Train LoRA/QLoRA adapters for parameter-efficient fine-tuning of large language models.

1|Updated May 16, 2026
One-click install
npx skills add https://github.com/devMoez/titan --skill peft-fine-tuning-devmoez
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: peft-fine-tuning
Source: https://github.com/devMoez/titan/tree/main/optional-skills/mlops/peft
Command: npx skills add https://github.com/devMoez/titan --skill peft-fine-tuning-devmoez

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires peft>=0.13.0, transformers>=4.45.0, torch>=2.0.0, bitsandbytes>=0.43.0, and includes references (resource) components.

What problem does it solve?

Parameter-efficient fine-tuning (PEFT) solves the problem of adapting large language models without the cost and GPU memory required for full fine-tuning.

Core Features & Use Cases

  • LoRA/QLoRA training for memory efficiency: Train a small fraction of parameters (adapters) while keeping the base model largely frozen, with QLoRA adding 4-bit quantization for fitting much larger models.
  • Multi-adapter workflows: Create multiple task-specific adapters, switch between them at inference time, or serve them in combination.
  • Adapter lifecycle for deployment: Save adapters only during training, then merge adapters into the base model for simpler deployment and faster inference.

Use case example: You want to adapt a 70B instruction-tuned model to your domain on a single 24GB GPU; you use QLoRA to train adapters that fit locally, then deploy either as adapters (multi-variant serving) or by merging into a standalone model.

Quick Start

Use the PEFT/LoRA approach to fine-tune a 7B model on your instruction dataset while training only small low-rank adapter weights.

Frequently Asked Questions about peft-fine-tuning

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

FAQPage Schema
How do I fine-tune a large language model on a single GPU with limited memory?

You can fine-tune large models on limited hardware using parameter-efficient fine-tuning. By training small LoRA adapters while keeping the base model frozen, or using QLoRA with 4-bit quantization, you can fit significantly larger models into constrained GPU memory.

What is the difference between LoRA and QLoRA for transformer fine-tuning?

LoRA trains small low-rank adapter weights while keeping the base model frozen, whereas QLoRA adds 4-bit quantization on top of LoRA. QLoRA reduces memory requirements further, allowing you to fit much larger models on consumer hardware like a single 24GB GPU.

Does PEFT support multi-adapter workflows for serving different task variants?

PEFT supports multi-adapter workflows by allowing you to create multiple task-specific adapters. You can switch between these adapters at inference time or serve them in combination to handle different tasks and variants efficiently.

How do I deploy LoRA adapters after training with HuggingFace transformers?

For deployment after training, you can save the lightweight adapters and either serve them as multi-variant adapters or merge them directly into the base model. Merging adapters creates a standalone model for simpler deployment and faster inference.

Can I use bitsandbytes for 4-bit quantization when training LLM adapters?

Yes, you can use bitsandbytes for 4-bit quantization during parameter-efficient fine-tuning. This integration enables QLoRA, which drastically reduces GPU memory usage so you can train large language models on consumer hardware.

What dependencies do I need for parameter-efficient fine-tuning with PEFT?

Parameter-efficient fine-tuning requires HuggingFace PEFT integrated with transformers, plus compatible versions of torch. Optionally, bitsandbytes is required for QLoRA quantization to further reduce memory consumption on consumer GPUs.