Build Prototype

Build a disposable but finished-looking model of the whole surface so the user can settle structure, relationships, and behavior before implementation.

Ground the prototype

Use the request and conversation as the primary scope. When present, read GLOSSARY.md, only relevant entries from docs/decisions/README.md, and any work-unit spec identified by the request or a prior handoff. Do not require or search for a spec before building.

Inspect the existing product and design system. Use their canonical terms, interface language, tokens, and components; otherwise use the user's language and the template's finished minimal style. Surface conflicts instead of resolving them silently.

Hold confirmed relationships fixed. Keep overlays, drawers, and modals attached to their source screen unless the user is reconsidering that relationship.