internal/

Package content loads the embedded lesson JSON files.

Package engine is a small real-time Vim emulator: feed it keystrokes, it mutates buffer/cursor/mode state and reports what happened.

Package game holds the scoring and progression math.

Package progress persists the player's journey to a versioned JSON file.

Package ui is the Bubble Tea front end: one root model, one screen at a time.

Package update checks GitHub for newer releases and can replace the running binary in place.