All of the [instructions for contributing from the main repository](https://github.com/Homebrew/homebrew-cask/blob/master/CONTRIBUTING.md) apply, and won't be repeated here. You simply need to change references to `homebrew/homebrew-cask` (that repository) to `homebrew/homebrew-cask-versions` (this repository).
## Naming Versions Casks
All Cask names and tokens should be of the form of:
`<token><numbered version>` or `<token>-<pre-release type>`
For Casks of [nightlies](https://en.wikipedia.org/wiki/Daily_build), `version`, `sha256`, and `url` change frequently, making the Cask constantly outdated. To alleviate having to regularly update them, the use of a [`url do` block](https://github.com/Homebrew/homebrew-cask/blob/master/doc/cask_language_reference/stanzas/url.md#using-a-block-to-defer-code-execution) in conjunction with `version :latest` and `sha256 :no_check` is encouraged, to ensure the latest version is always fetched.