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Summary: Any CAST User Community extension (i.e. a custom extension) requires documentation that is freely available on the internet. CAST highly recommends

using the CAST Extend Organisation in GitHub and creating a dedicated repository

creating the documentation within the GitHub repository you are using for the source code. This page describes the steps required to publish documentation in GitHub.


  • In


  • the


GitHub account

You need a GitHub account. If you already have an account you can use this, but if not you will need to create a new one - see


Please note:

  • the GitHub account must be a "public" account
  • the account you use to access the CAST Extend website is not linked to GitHub and therefore if you do not already have your own GitHub account you will need to create a new GitHub account specifically to edit and create the extension documentation. You can use the same credentials (login/password) that you use for the CAST Extend website, but this is not mandatory.

Membership of the CAST-Extend GitHub organization

You need to become a member of the CAST Extend organization. At the current time, please contact the GitHub user "CASTNDO" who will be able to add you to the organization. You will receive an email from GitHub (in the mailbox used for your GitHub account) containing a link which you need to click to confirm the membership.

You will also require "create new repository" privileges in the CAST Extend organization. If you cannot create a repository, please request this privilege.

Create a repository on GitHub

To create a new repository for your extension documentation:

  • Access the CAST Extend organization on GitHub.
  • Inside the organisation, create a new repository (as shown in the screenshot below):

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  • Fill in the required details for the repository:
    • Use the extension's "ID" for the Repository name, i.e. com.castsoftware.uc.nameoftheextension as explained in Extension description file
    • Set the repository to public
    • Tick the Initialize this repository with a README option
    • Click the Create repository button

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  • Create a new page that will contain the extension documentation: