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Penmentor: An Open-Source Tool Using Claude to Mark Up Handwritten Math
Original title:Show HN: Penmentor – Claude marks up your handwritten math like a teacher
Open Source68
Penmentor is an open-source project that leverages Claude's vision capabilities to review and mark up handwritten math calculations. Rather than returning separate text explanations, the system overlays teacher-like annotations and step-by-step corrections directly onto the scanned work. It illustrates how multimodal LLMs can move beyond standard conversational tutoring into spatial, artifact-level feedback for education.
Why it's worth reading
It demonstrates a practical interface paradigm where vision models generate red-pen-style annotations directly on handwritten work, offering a concrete open-source blueprint for AI tutoring.
Tags
PenmentorClaudeMultimodalMathEducationShow HNOpenSource