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Open a native infinite canvas widget in Codex for visual work.
The materials indicate this is a prompt-only open-source skill with no required secrets, no declared remote endpoints, and no standalone data exfiltration behavior, so the overall risk is low. The main caveat is that it depends on an external Cowart MCP tool and project-directory context, while the repository has unclear licensing and maintenance status, which limits supply-chain confidence.
The material explicitly states that no secrets or environment variables are required. The README does not ask for API keys, tokens, or account credentials, and shows no direct sign of credential collection, storage, or misuse.
Both the system checks and the material show no remote endpoints. The README says the canvas is opened as a native widget and explicitly says not to start a localhost service for normal use; there is no factual indication that user content is sent to external services.
This item has been classified as prompt-only. The text mainly instructs use of the existing `render_cowart_canvas_widget` tool and explicitly says not to start `scripts/start-canvas.sh` or run other validation steps. Based on the material, the skill itself does not add a new local code-execution surface.
The README notes that canvas data is stored under `canvas/pages/...` within the active project, but also instructs not to inspect those files unless opening fails or the user explicitly asks. There is no stated access beyond the active workspace and no sign of overbroad authorization.
The GitHub repository is open source, which improves auditability and lowers risk. However, the license is unspecified, community adoption is 0 stars, and maintenance status is unknown, so source trust and ongoing upkeep are limited; review the code and dependencies before production use.
Copy the install command and let the AI configure it · recommended for beginners
Please install the "cowart-open-canvas" skill from askskill: 1. Download https://raw.githubusercontent.com/zhongerxin/Cowart/main/skills/cowart-open-canvas/SKILL.md 2. Save it as ~/.claude/skills/cowart-open-canvas/SKILL.md 3. Reload skills and tell me it's ready
Designers, product managers, or developers can use it when they need to quickly open an infinite canvas inside Codex. It fits requests that explicitly ask to open, view, or work in the Cowart canvas.
When a user wants the native canvas widget in the current Codex workspace rather than a separate local page, this skill opens the correct component directly. This keeps the canvas experience inside the existing project context.
The documentation explains how to open the Cowart canvas as a native Codex widget by using the render_cowart_canvas_widget MCP tool with the active workspace as projectDir. It emphasizes not using the plugin repository path, notes that canvas data is stored inside the project’s canvas directory, and says tool discovery may be needed if the renderer is not visible. After installation or upgrade, a new Codex conversation may be required to load the updated MCP schema.
render_cowart_canvas_widget tool to open the canvas as a native Codex widget. Pass the user's active Codex workspace as projectDir; do not pass the Cowart plugin repository directory.{
"projectDir": "/absolute/path/to/user/codex-project"
}
The tool returns openai/outputTemplate: ui://widget/cowart/canvas.html, which tells Codex to render the widget directly. Do not start scripts/start-canvas.sh or open a localhost URL for normal use.
canvas/pages/<page-id>/cowart-canvas.json
canvas/pages/<page-id>/assets/
Do not launch the old local web service, inspect canvas files, run builds, check storage layout, take screenshots, or perform other validation steps unless opening the widget fails or the user explicitly asks for those checks. The scripts/start-canvas.sh path is now only a local-development fallback.
It opens the native Cowart canvas widget inside Codex, a tldraw-powered infinite canvas. Use it when the user wants to open, view, or work in the Cowart canvas.
Not for normal use. The docs say it should render the native widget through the render_cowart_canvas_widget tool instead of starting the old local service; the local script is only a development fallback.
First try tool discovery for Cowart widget or rendering capabilities. If the plugin was just installed or upgraded, a new Codex conversation may be needed to load the new MCP tool schema.
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