CodeTrain

CodeTrain ensures that engineers maintain a deep understanding of their codebase in an era of AI-generated code. While AI writes the initial code, CodeTrain requires developers to actually comprehend and write it themselves to prove and reinforce their technical comprehension of the code CodeTrain flips the default of coding agents. Instead of writing code for you, it turns any question, repo context, or onboarding task into a short lesson on your own codebase: two to six small steps, each one typed by you in an editor with an instant run/test loop. The tutor grades every step, asks Socratic questions when you miss, and shrinks the step when you're stuck. Pro adds repo mode with a single reviewable patch-back of the code you wrote; Team adds ramp dashboards and onboarding journeys. Free tier runs in the browser, ten sessions a month, no card.