peft-fine-tuning

Fine-tune large language models with LoRA and QLoRA adapters.

Updated Feb 15, 2026
One-click install
npx skills add https://github.com/ricable/mcai --skill peft-fine-tuning-ricable
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: peft-fine-tuning
Source: https://github.com/ricable/mcai/tree/main/.agents/skills/peft-fine-tuning
Command: npx skills add https://github.com/ricable/mcai --skill peft-fine-tuning-ricable

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps you fine-tune large language models without the cost of full-model training, making adaptation practical on limited GPU budgets while preserving strong task performance.

Core Features & Use Cases

  • LoRA and QLoRA workflows: Configure parameter-efficient adapters for instruction tuning, domain adaptation, and low-memory training.
  • Advanced adapter methods: Apply variants such as DoRA, AdaLoRA, IA3, prefix tuning, and multi-adapter serving when different efficiency and quality tradeoffs matter.
  • Training and deployment guidance: Follow proven recipes for TRL, Axolotl, vLLM, merging adapters, and diagnosing common memory or loading failures.
  • Use case: If you need to adapt a 70B model on a single 24GB GPU, this Skill helps you choose QLoRA, set the right rank and target modules, and plan a stable training run.

Quick Start

Use the peft-fine-tuning skill to recommend the best PEFT method for my model, GPU memory, dataset type, and deployment target.

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 70B large language model on a single 24GB GPU?

Fine-tune a 70B model on a single 24GB GPU by applying QLoRA, which quantizes the base model and trains parameter-efficient adapters to minimize memory overhead while preserving task performance.

What is the difference between LoRA, QLoRA, DoRA, and AdaLoRA for Hugging Face transformers?

LoRA, QLoRA, DoRA, and AdaLoRA are parameter-efficient fine-tuning variants offering different memory and quality tradeoffs, with QLoRA adding quantization for lower memory limits and DoRA modifying weight updates.

How do I configure PEFT adapters for instruction tuning and domain adaptation?

Configure PEFT adapters for instruction tuning and domain adaptation by setting the appropriate rank, target modules, and adapter method within Hugging Face workflows to update only specific layers efficiently.

Can I serve multiple LoRA adapters simultaneously with vLLM?

Yes, multi-adapter serving allows you to deploy multiple LoRA adapters simultaneously with vLLM, enabling dynamic switching between customized models without loading duplicate base weights into memory.

Why does my PEFT training run fail with out-of-memory errors?

PEFT training fails with out-of-memory errors when GPU limits are exceeded, which you can troubleshoot by switching to QLoRA, reducing batch size, or adjusting adapter rank and target modules.

How do I merge trained adapters back into the base model?

Merge trained adapters back into the base model using supported PEFT configurations, which combine the adapted weights with the original model for standalone deployment without loading adapter files separately.