I fixed my AI goose tutor to stop punishing understanding
Understanding meter that drops when you hand-wave instead of explaining mechanisms.

This is a typing tutor that treats your habits like telemetry: it breaks input into n‑grams, highlights the weakest patterns, and queues those fragments for focused practice (reinforced or sequential). The site shows a target WPM slider, mastery queue, keyboard visualizer and huge multilingual/code wordlists — practical features that suggest real UX thinking. I'd like persistent progress graphs and custom text import, but the pattern-first approach is a neat, non-trivial twist on a crowded space.
People learning touch typing, language learners, programmers and power users who want to improve typing speed and accuracy
Understanding meter that drops when you hand-wave instead of explaining mechanisms.
Sealed types + exhaustive pattern matching compile to flat Go interop—no runtime overhead.
AST-level regex analysis with auto-fix beats string-based ReDoS checkers.
Tackles real frustration (AI slop in comments), but typing signals are easily spoofed.
SSH was built for humans; this binary protocol is built for agents from scratch.
JetValidator cuts Fastify startup from 658ms to 122ms with 100 routes and complex schemas.