Snyk CLI Help files are managed by GitBook connected to the snyk/user-docs repository.
It's recommended to make all CLI Help changes there. Changes from GitBook are automatically synced to the Snyk CLI repository with a GitHub Action. The Action creates a PR that needs to be approved and merged. This Action could also be manually triggered.
If you need to make changes tied to a specific PR, you can make them in this repository first, merge the changes and then move them over to the GitBook.
CLI help files are a standard Markdown.