About agent-ecosystem/agent-skill-implementation
But "some level" is doing a lot of work in that sentence. If you're publishing skills for others to use, your users could be on any of those 25+ platforms, and each one may load, present, and manage your skill differently. A skill that works perfectly on the platform you tested it on may lose access to its reference files, have its metadata stripped, or find its instructions pruned from context on another, with no error to tell you any of it happened.