Lists the skills of the provider's Agent: the instructions it follows at this provider, each run by its slash command or picked by the Agent when a request matches its description. Bobsled skills are kept up to date by Bobsled and are read-only; custom skills, named custom-, are the provider's own and can be changed. To copy a skill to another provider, get it, then create it on that provider with copiedFrom set to its copySource.