What problem does it solve? Design sprint teams need a realistic, testable prototype in a single day without writing production code, and this Skill provides the workflow to build disposable clickable facades matched to the uncertainty being tested. ## Core Features & Use Cases - Dual-Fidelity Prototyping: Build low-fidelity clickable wireframes on tldraw Desktop or high-fidelity pixel-perfect screens via Google Stitch MCP with responsive HTML/CSS output. - Pencil.dev Exploration: Generate Crazy 8s concept boards and reconstruct existing iOS app UIs as editable layers using the headless pen CLI with design-system constraints from DESIGN.md. - Sprint Role Orchestration: Coordinate Maker, Stitcher, Writer, and Asset Collector roles with a zero Lorem Ipsum rule and a mandatory 15:00 Trial Run QA audit. - Use Case: On Thursday of a design sprint, generate a 12-screen checkout flow facade with authentic copy, wire the navigation links, and rehearse the full golden path before Friday's user interviews. ## Quick Start Ask the agent to build a Thursday Goldilocks prototype facade for your storyboard using Stitch MCP or tldraw, with authentic copy and a 15:00 trial run QA check.