Sponge — Master the AI-Native Workflow
Sponge is an AI-native coding practice platform. Solve real engineering challenges sourced from production open-source codebases, with a built-in AI copilot. Get scored on how effectively you collaborate with AI — not just whether the code works.
How it works
- Real code — Production codebases from open source repos. Not toy problems or algorithm drills. You build features, fix bugs, and refactor in code that actually shipped.
- AI built in — An AI copilot that sees your full context. Learn to prompt effectively, delegate the right tasks, and verify what comes back.
- Get scored — A rubric that measures how you collaborate with AI — not just whether the tests pass. See exactly where you excel and where to improve.
Features
- Challenges sourced from real open-source projects (Flask, Requests, RQ, Click, and more)
- In-browser code editor with file tree, test runner, and terminal
- AI copilot powered by KIMI K2 that understands your full session context
- Free: test results (pass/fail) for every challenge. Pro: full AI collaboration scoring across 7 dimensions, badge tiers, and AI-powered insights
- Profile pages with contribution calendars and skill progression
Pages
Get started free at getsponge.ai