Noesion Radarnoesion.ai
Release2026-10-22

Abdullah AlHariri released PenMentor, an open-source tool. It marks handwritten math mistakes on screen like a teacher. It gives hints instead of answers. It can show concepts as interactive animations. It works with Claude, Codex or Antigravity agents. It runs locally on a user’s own subscription. It integrates with xournal++ for full-page awareness. It is available under an MIT license.

What it unlocks

Receiving visual feedback and hints on handwritten math in real time.

What you need to act on it

  • Linux on X11
  • Claude, Codex or Antigravity CLI installed and logged in
  • rofi, slop, xdotool and PyQt6 installed
  • xournal++ running

Sources

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