Agent Skills: ticket-structure

S-phase skill for the ticket-writing workflow. Designs the TICKET ITSELF — sections, numbered Parts for heavy tickets, custom outline for unusual ones. Tag recipe drives the default shape (when Phase 4 references are in place); custom outline applies when the recipe doesn't fit. Reads the Design Summary from ticket-design; produces a Structure Outline section in the ticket body that ticket-plan and ticket-write will consume. Per QRDSPIV §S: 'scope, don't prescribe' — the outline names sections, it doesn't fill them.