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create-canvas

MITUpdated on Nov 11, 20265,616GitHub stars

Kept in the gh-aw repository, this skill explains how to build canvas extensions for the GitHub Copilot app, panels the agent can open beside the conversation.

InstallRepository Checked on Nov 13, 2026

What the skill teaches

Kept in the gh-aw repository, this skill explains how to build canvas extensions for the GitHub Copilot app, panels the agent can open beside the conversation. It sets out an order of work: choose whether the extension belongs to the project, the user or the session, scaffold it with the extension management tool, edit the open handler and actions, reload, inspect the extension for errors and then drive it through a validation checklist. It also describes the shape of an extension as a Node process that talks JSON-RPC to the Copilot CLI.

Capabilities

  • Scaffold a canvas extension for the GitHub Copilot app
  • Add actions and inputs to a canvas
  • Reload and inspect an extension to find failures
  • Validate a canvas by opening it and calling its actions

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