Agent Skills Engineering
Build, route, secure, evaluate, package, and verify Agent Skills in real hosts.
#LessonPhaseTimeRequirementOpen
01Agent Skills: Portable Contract and Runtime BoundaryA skill is not a long prompt with a better filename. It is a discoverable package of instructions, resources, and executable helpers that enters an agent's context through a runtime contract.Phase 1390 minRequired↗ Official lesson02Skill Discovery and Progressive DisclosureA skill becomes useful before its body is loaded. Its name and description earn a place in the catalog; its deeper files earn context only when the task reaches them.Phase 13105 minRequired↗ Official lesson03Skill Invocation and RoutingInvocation is an authority decision followed by a relevance decision. A good description helps the model choose; a good policy decides whether that choice is allowed.Phase 13105 minRequired↗ Official lesson04Skill Permissions, Sandboxes, and TrustA skill can suggest an action. Only the host can authorize it, only an isolation boundary can contain it, and only verification can tell you whether it worked.Phase 13120 minRequired↗ Official lesson05Skill Evals, Packaging, and PortabilityA skill is finished when its package survives linting, routes on the right requests, improves a measured task, stays inside policy, and degrades honestly on another host.Phase 13150 minRequired↗ Official lesson