Penmentor annotates handwritten math with AI models
What happened
On October 20, the Hacker News front page covered Penmentor, a handwriting math tutoring tool. It connects Claude, Gemini or GPT to xournal++, so a keypress lets the model mark errors on a handwritten math page, give hints and generate interactive animations. It uses existing subscriptions through Claude Code, Codex or the Antigravity CLI, and supports reading a full page, tiered hints and manim-based animation. The post also says the handwriting in the demo video is script-driven and the model answers are fixed.
Written by AI from the coverage · updated 1 hour ago
Coverage
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- Hacker News front pageShow HN: Penmentor – Claude marks up your handwritten math like a teacher
Penmentor 将 Claude、Gemini 或 GPT 接入 xournal++，按键即可在手写数学页面上标注错误、给出提示并生成交互动画。它通过 Claude Code、Codex 或 Antigravity CLI 使用已有订阅，支持整页读取、分级提示和基于 manim 的动画；演示视频使用脚本控制笔迹及固定模型回答。
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