An English coach that lives in your terminal. You talk to it like you'd talk to a friend. It corrects your grammar as you go, tracks every mistake over time, and scores each session.
The split
The interesting part is the split. An LLM handles recognition, because judging whether a sentence "sounds right" needs fuzzy, human-grade reasoning. Everything after that is plain deterministic code: parsing, counting, rating. Same session, same numbers, every time. Tune the scoring weights later and every past session re-scores consistently, since the rating is never stored, only recomputed.
Vocabulary
It also builds a spaced-repetition deck for you along the way. Every word you gap on mid-sentence becomes a flashcard, reviewed with a self-built SM-2 engine and exportable straight to Anki.
Shape
Three coaching modes (casual, formal, interview), Postgres for storage, a SQLite branch if you don't want to run Docker. Built out of genuinely wanting something to fix my own English, not a wrapper around a prompt.