by erickong · Codex Skill · ★ 380
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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. Move, resize, accept, or discard every AI draft before it becomes part of your work. Draw naturally with a stylus or mouse, then pan and zoom across a sparse canvas. Draw a freehand lasso around confirmed ink to move, resize, or recolor it locally; accepting or cancelling a selection
| 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.
The top alternatives to penecho on Agent Skills Hub include penecho, opencove, MoltBrain. Each offers a different approach to the same problem space — compare them side-by-side by stars, quality score, and community activity.