Diagnose
Names the bug class and the hidden misconception—not just the broken line.
Breakpoint turns a failed solution into a precise diagnosis, the smallest repair, and a 60-second lesson—then checks that the student actually understood it.
NO-SETUP DEMO Prepared cases run here without an API key. Custom code requires an API-enabled deployment or local setup.
Names the bug class and the hidden misconception—not just the broken line.
Changes the minimum code possible, so the student keeps ownership of the solution.
Uses one targeted question to prove the concept landed before celebrating success.