I built my husband a vim trainer with a Gemma coach that runs in the browser

Описание и применение

Приложение hjkl обучает Vim через короткие упражнения, используя реальное поведение Vim и локальный AI‑коуч Gemma, что позволяет пользователю продолжать обучение без внешнего давления.

Задача

My husband struggled to learn vim because of too many commands to memorize and slow, awkward experience.

Результат

The app enabled sustained engagement with vim drills, providing real-time feedback and AI-generated content, leading to continued learning without external motivation.

Рабочий процесс

• 1. Create lessons with a small set of commands and a cheat sheet.
• 2. Design drills with a goal, a reference solution, and a par length.
• 3. Run tests against real vim to validate solutions and par.
• 4. Implement AI coach using Gemma 4 E2B on WebGPU via Transformers.js.
• 5. Provide feedback after over-par solves and hints.
• 6. Generate new drills with Gemma and validate them.
• 7. Deploy as a static site on Cloudflare Workers.

Доказательства

My husband has wanted to learn vim for a long time. He's tried a bunch of times, and it always ends the same way: he gives up.

Источник

Each drill gives you a small buffer, a goal, and a keystroke "par" to beat. You solve it in a real vim editor, not a simulation.

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The AI coach is optional and off by default. When you turn it on, it downloads Gemma 4 E2B once and runs it in a Web Worker on WebGPU with Transformers.js.

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The app supplies the keys by reusing the key patterns from that lesson's hand‑written drills on the new text. Then it plays them in real vim to get the goal and par.

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