google / styleguide

Style guides for Google-originated open-source projects

goldbergyoni / nodebestpractices

✅ The Node.js best practices list (July 2026)

storybookjs / storybook

Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation

astral-sh / ruff

An extremely fast Python linter and code formatter, written in Rust.

primer / css

Primer is GitHub's design system. This is the CSS implementation

rubocop / rails-style-guide

A community-driven Ruby on Rails style guide

PyCQA / pycodestyle

Simple Python style checker in one Python file

style-dictionary / style-dictionary

A build system for creating cross-platform styles.

PyCQA / flake8

flake8 is a python tool that glues together pycodestyle, pyflakes, mccabe, and third-party plugins to check the style and quality of some python code.

wemake-services / wemake-python-styleguide

The strictest and most opinionated python linter ever!

airbnb / swift

Airbnb's Swift Style Guide

bjankord / style-guide-boilerplate

⚡️🎨 A starting point for crafting living style guides.

kamadorueda / alejandra

The Uncompromising Nix Code Formatter

lookbook-hq / lookbook

A UI development environment for Ruby on Rails apps

KittyGiraudel / sass-guidelines

Guidelines for writing sane, maintainable and scalable Sass.

pep8speaks-org / pep8speaks

A GitHub :octocat: app to automatically review Python code style over Pull Requests