Curated Content Skills
You could choose to write a Base Corpus Skill where the content is still sourced from another platform (i.e. it is an NLP Adapter) but the content cannot be changed or chosen by the person consuming the Skill from the project form.
This enables you to share some conversational content for others to use in a pre-configured way, so that there is no need to configure credentials for a specific conversation from the project form itself.