Prompted skills
Hope they work. Hope they scale. Hope someone remembers how they work when the original author leaves.
Prototype skills
Work in demos. Fail in production. No testing, no documentation, no handover plan.
Vendor skills
Locked into one platform. Can't move to another framework. Can't audit the code.
We engineer AI skills the same way we engineer systems: with rigor, testing, documentation, and production-ready handover.