by erickong · Codex Skill · ★ 380
Think with AI beyond the chat box. PenEcho is a shared canvas where handwriting, equations, diagrams, and spatial context become part of the conversation. Think on the canvas Put a question, equation, diagram, or half-formed idea anywhere on the canvas and pause. PenEcho reads your marks and their spatial relationships, then answers beside them. You can work through a problem without translating every step into a chat message or rebuilding it with rigid diagram tools. Get answers, hints, explanations, continuations, formulas, plots, and diagrams directly on the canvas.
| Stars | 380 |
| Forks | 48 |
| Language | JavaScript |
| Category | Codex Skill |
| License | AGPL-3.0 |
| Quality Score | 66.4296697094551/100 |
| Open Issues | 4 |
| Last Updated | 2026-07-20 |
| Created | 2026-07-14 |
| Platforms | claude-code, codex, node |
| Est. Tokens | ~17k |
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penecho is Think with AI beyond the chat box. A shared canvas for handwriting, equations, diagrams, and spatial reasoning.. It is categorized as a Codex Skill with 380 GitHub stars.
penecho is primarily written in JavaScript. It covers topics such as ai, canvas, claude.
You can find installation instructions and usage details in the penecho GitHub repository at github.com/erickong/penecho. The project has 380 stars and 48 forks, indicating an active community.
penecho is released under the AGPL-3.0 license, making it free to use and modify according to the license terms.