pytorch-lightning

Automate PyTorch training code with distributed strategies and callbacks.

Updated Apr 24, 2026
One-click install
npx skills add https://github.com/Harries/hermes-agent --skill pytorch-lightning-harries
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: pytorch-lightning
Source: https://github.com/Harries/hermes-agent/tree/main/optional-skills/mlops/pytorch-lightning
Command: npx skills add https://github.com/Harries/hermes-agent --skill pytorch-lightning-harries

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

PyTorch Lightning reduces boilerplate in PyTorch by providing a structured interface for model, data, and training steps, enabling scalable and reproducible training across devices.

Core Features & Use Cases

  • Automatic distributed training across GPUs/TPUs with minimal changes (DDP, FSDP, DeepSpeed)
  • Callbacks, logging, and checkpointing for robust experimentation
  • Device-agnostic scaling from CPU to multi-node clusters

Quick Start

Install lightning, define a LightningModule and dataloaders, and run a Trainer to start training.

Frequently Asked Questions about pytorch-lightning

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

FAQPage Schema
How do I scale PyTorch training across multiple GPUs without writing boilerplate code?▼

PyTorch Lightning reduces PyTorch training boilerplate by providing a structured interface that automates distributed training across GPUs with minimal changes, supporting DDP, FSDP, and DeepSpeed strategies out of the box.

Can I switch between CPU and multi-node GPU clusters without changing my training code?▼

Yes, PyTorch Lightning provides device-agnostic scaling that allows you to switch between CPU, single-GPU, and multi-node cluster setups easily by utilizing its modular Trainer and built-in distributed strategies.

What is the best way to add checkpointing and logging to a PyTorch training loop?▼

The best way to add checkpointing and logging is using PyTorch Lightning's built-in callbacks, which provide modular training loop extensions for robust experimentation without cluttering your core model logic.

How do I start using Lightning for my existing PyTorch model?▼

To start using Lightning, install the library, define your model and data steps inside a LightningModule, pass your dataloaders to it, and then run a Trainer instance to execute the automated training loop.

Does PyTorch Lightning support distributed training strategies like FSDP and DeepSpeed?▼

Yes, PyTorch Lightning supports distributed training strategies like FSDP and DeepSpeed natively, enabling automatic distributed training across GPUs and TPUs with minimal code modifications required.