Explore Challenges

Browse coding challenges sourced from real open-source production codebases. Each challenge puts you in a real codebase with a built-in AI copilot and scores how effectively you collaborate with AI.

Challenge Types

Bug Fix

Find and fix real bugs from open-source issue trackers. Debug production code with AI assistance and learn to verify fixes thoroughly.

Feature Build

Implement new features in existing codebases. Plan your approach, delegate tasks to AI, and ship working code that integrates with the existing architecture.

Refactor

Improve code quality in real projects. Restructure, optimize, and clean up production code while maintaining all existing functionality.

Difficulty Levels

Beginner — Small, focused tasks with clear guidance. Great for learning the AI collaboration workflow.
Easy — Straightforward problems in well-structured codebases. Build confidence with AI-assisted coding.
Intermediate — Multi-file changes requiring deeper understanding. Learn to effectively delegate complex tasks to AI.
Advanced — Challenging problems in large codebases. Master the art of AI collaboration on production-grade engineering.

Source Projects

Challenges are sourced from real open-source projects including Flask, Requests, RQ, Click, and more. Every challenge comes from code that actually shipped in production.

How Scoring Works

After completing a challenge, all users see test results showing which tests pass and fail. Pro users unlock the full AI Collaboration Quotient (ACQ) scoring with dimension breakdowns across 7 areas, badge tiers, AI-powered coaching insights, and personalized recommendations to improve their AI collaboration skills.

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