MergeKata: fix real AI-written bugs

Practice code review and debugging on bugs actually written by AI assistants

Problem

Code from AI assistants often ships subtle edge-case and logic bugs, and developers have gotten used to pasting and merging fast, letting review skills decay. Existing LeetCode-style problems are hand-designed and deterministic, far from the real defect shapes produced by AI.

Solution

A practice site where each kata is runnable code containing a real bug introduced by AI-generated code; users locate it, edit in-browser, and pass the tests, then get a defect-type breakdown and improvement notes. Filter by language and bug type, and track fix accuracy and time.

Users

Junior-to-mid developers using AI coding assistants and engineers preparing for code review interviews

MVP

20-30 real AI-bug katas; in-browser editor with test runner; defect-type analysis and feedback after submit; filter by language and bug type; personal progress history

Revenue

Free katas plus subscription for advanced sets, team challenges and enterprise training; paid certificates as an add-on

Why now

AI-generated code is the norm but training products for reading and fixing others' code are scarce; the question bank can be expanded with AI help and run by one person