Kevin Chen (solo)

CodeGym — an AI-powered coding practice platform that goes beyond LeetCode/DSA. https://hackathon-vercel-gemini.vercel.app/ Stack: Next.js 16 + React 19, Supabase (Postgres), Google Gemini, Vercel Sandbox, Monaco Editor, BetterAuth What it does: Problem Generation — Gemini creates realistic, real-world coding problems (not DSA), complete with starter code, reference solution, test harness, and hints Real Code Execution — User code runs in a Vercel Sandbox against actual test cases (with a Node.js eval fallback) MCQ Marathon — Adaptive multiple-choice quizzes that target weak areas Chat memory insert — Currently the functionality is limited to the user inserting context into the system for the memory feature (to manually add memories) Skill Memory — A living AI-generated profile tracking domain scores (0-100), strong/weak skills, and interaction history. Every problem attempt, MCQ session, and chat updates the profile via Gemini Core loop: Generate problem → solve it → execute against real tests → AI updates your skill profile → next problem adapts to your weaknesses.