Open Source Training Platform

BecomeaRealOpenSourceContributor.

Practicing on repos trusted by millions

ReactTensorFlowVSCodeNode.jsNext.jsKubernetes

The Problem

You've grinded LeetCode.
You still don't know how to
contribute to open source.

DSA prepares you for interviews. Nothing prepares you for reading a 200k line codebase, understanding an issue, and writing a fix a real maintainer would actually merge. Until now.

How It Works

From zero to merged — 7 steps.

Step 1 of 7

Choose Your Repo

Browse 19+ top GitHub repositories including React, TensorFlow, VSCode, and Node.js. All synced with real recently-closed issues.

Choose Your Repo

Browse 19+ top GitHub repositories including React, TensorFlow, VSCode, and Node.js. All synced with real recently-closed issues.

Get Personalized Issues

Issues are matched to your skill level and the languages you use. No random noise — only what's relevant to you.

Understand the Task

Every issue comes with a simplified explanation: the project context, the symptom, the root cause, and the fix direction. No more staring at code with no idea where to start.

Find the Target File

Navigate the real repository file tree to locate the exact file that needs changing. Depth-calibrated clues unlock if you get stuck.

Talk to the AI Maintainer

Describe your approach to an AI that simulates a real open-source maintainer. Get approved before you touch the code — just like the real world.

Write the Fix

Edit the actual file in an embedded Monaco editor — the same editor that powers VSCode. No toy environments, no abstractions.

Get Your Score

Your solution is evaluated across 4 dimensions: solution quality, code quality, understanding, and navigation efficiency. Get feedback like a real code review.

The Product

What it actually looks like.

CHOOSE YOUR ISSUE

Top GitHub Repositories

★ Show Personalized

facebook/reactFeatured

React

The library for web and native user interfaces.

244,565

50,962

JavaScript

declarativefrontendjavascriptlibrary+2

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

tensorflow/tensorflow

Tensorflow

An Open Source Machine Learning Framework for Everyone

194,771

75,282

C++

deep-learningdeep-neural-networksdistributedmachine-learning

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

microsoft/vscode

VSCode

Visual Studio Code — Open Source

166,843

29,841

TypeScript

editorelectronmicrosofttypescript

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

nodejs/nodeFeatured

Node.js

Node.js JavaScript runtime

109,832

30,521

JavaScript

javascriptnodejsruntime

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

vercel/next.js

Next.js

The React Framework for the Web

128,461

27,310

JavaScript

nextjsreactssrtypescript

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

kubernetes/kubernetes

Kubernetes

Production-Grade Container Scheduling and Management

113,042

40,274

containersdevopsgokubernetes

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

django/django

Django

The Web framework for perfectionists with deadlines.

81,492

31,762

Python

djangopythonweb

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

rust-lang/rust

Rust

Empowering everyone to build reliable and efficient software.

99,841

12,810

Rust

programming-languagerustsystems

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

CHOOSE YOUR ISSUE

Top GitHub Repositories

★ Show Personalized

facebook/reactFeatured

React

The library for web and native user interfaces.

244,565

50,962

JavaScript

declarativefrontendjavascriptlibrary+2

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

tensorflow/tensorflow

Tensorflow

An Open Source Machine Learning Framework for Everyone

194,771

75,282

C++

deep-learningdeep-neural-networksdistributedmachine-learning

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

microsoft/vscode

VSCode

Visual Studio Code — Open Source

166,843

29,841

TypeScript

editorelectronmicrosofttypescript

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

nodejs/nodeFeatured

Node.js

Node.js JavaScript runtime

109,832

30,521

JavaScript

javascriptnodejsruntime

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

vercel/next.js

Next.js

The React Framework for the Web

128,461

27,310

JavaScript

nextjsreactssrtypescript

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

kubernetes/kubernetes

Kubernetes

Production-Grade Container Scheduling and Management

113,042

40,274

containersdevopsgokubernetes

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

django/django

Django

The Web framework for perfectionists with deadlines.

81,492

31,762

Python

djangopythonweb

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

rust-lang/rust

Rust

Empowering everyone to build reliable and efficient software.

99,841

12,810

Rust

programming-languagerustsystems

View on GitHub ↗Read GuidelinesView solved issues

Last synced: 17 Apr 2026

UNDERSTAND THE CONTEXT

Description

Understand the problem before coding.

Summary

Project Context: Our Node.js project is an open-source initiative that aims to provide a robust and maintainable foundation for building scalable server-side applications. The project involves a community-driven effort to contribute to the Node.js ecosystem, and we're always looking for new contributors to join the cause.

The Symptom: The current README.md file is outdated and does not accurately reflect the project's current state or the contribution guidelines. This can lead to confusion for new contributors who may struggle to understand the project's expectations and the process for submitting pull requests.

The Root Cause: The README.md file has not been updated in a while, and the existing content is no longer relevant. This is likely due to the project's rapid evolution.

The Impact: The outdated README.md file affects not only new contributors but also existing project maintainers who need to onboard new team members.

The Fix Direction: Update the README.md file to reflect the project's current state and contribution guidelines.

Your Task

Step 1: Identify the target file in the repository (README.md in this case)

Step 2 is locked — Identify the correct file to unlock

Step 3 is locked

Hints

Use these if you get stuck

The file you're looking for is in the root directory of the repository
Look for a file with a .md extension — it's a Markdown documentation file
The PR changed exactly 1 file

GET APPROVAL FROM AI MAINTAINER

AI Maintainer

Online · PRactice Bot

Hey! I'm the maintainer of nodejs/node. Before I assign this issue to you, I'd like to understand your approach. Can you explain how you plan to update the README.md? Specifically: 1. What sections will you modify? 2. How will you ensure it aligns with contribution guidelines?

Just now

Editor locked until maintainer approves your approach

WRITE THE FIX

Target File

/README.md

nodejs/node

README.md

# Node.js Node.js is an open-source, cross-platform JavaScript runtime environment. ## Table of Contents * [Looking for help?](#looking-for-help) * [Release Schedule](#release-schedule) * [Security](#security) * [Current Project Team Members](#current-project-team-members) * [Contributing](#contributing) ## Looking for help? If you have a question or need help, please open a GitHub Discussion. ## Release Schedule | Release | Status | Codename | End-of-life | |---------|------------|----------|-------------| | Node 20 | Maintenance LTS | Iron | 2026-04-30 | | Node 22 | Active LTS | Jod | 2027-04-30 | | Node 24 | Current | - | 2025-10-13 |

Ready to submit

0 ⚠️ 0

UTF-8Markdown

Early Access

Join the waitlist.

We're rolling out access to 50 developers at a time. Drop your details and we'll reach out when your spot is ready.

BecomeaRealOpenSourceContributor.

You've grinded LeetCode.You still don't know how tocontribute to open source.

From zero to merged — 7 steps.

Choose Your Repo

Choose Your Repo

Get Personalized Issues

Understand the Task

Find the Target File

Talk to the AI Maintainer

Write the Fix

Get Your Score

What it actually looks like.

Top GitHub Repositories

React

Tensorflow

VSCode

Node.js

Next.js

Kubernetes

Django

Rust

Top GitHub Repositories

React

Tensorflow

VSCode

Node.js

Next.js

Kubernetes

Django

Rust

Description

Hints

AI Maintainer

Join the waitlist.

You've grinded LeetCode.
You still don't know how to
contribute to open source.