Design Sprint Prototype Plan (Thursday morning)

Thursday is the prototype build day. This skill produces the morning planning artifact that makes the build run; it does NOT build the prototype itself. The skill assigns roles, locks the fidelity bar, drafts the Five-Act interview script, defines the trial-run gate, and confirms Friday participants. The actual building (Figma frames, slideware decks, role-play scripts, paper assemblies) is craft work the team owns through the rest of Thursday.

Family contract: docs/reference/skill-families/design-sprint-skills-contract.md. This skill is a member of design-sprint-skills.

When to Use

• It is Thursday morning of the Design Sprint and Wednesday's storyboard is signed off.
• The Friday participant tracker needs a Thursday-morning confirmation check; cancellations now trigger buffer activation.
• The interview script needs to be drafted (or refined from a prior sprint's template) before the interviewer can mock-run it Thursday afternoon.
• The team needs role assignments before parallel build work begins; ad-hoc assignment Thursday afternoon wastes 1-2 hours.

When NOT to Use