Use when more than one skill could apply to a task and the agent must decide trigger order, how skills hand off, and how to avoid conflicts. Covers process-before-implementation ordering, gatekeeper-last review, shared-artifact coupling, conflict serialization, override precedence, and the single-vs-combined decision. Trigger when a request spans research, design, build, test, and ship; when two skills give conflicting guidance; when building an entry/router skill that dispatches others.
