The locked Builder shell is the default persona surface used by every signed-in V1 builder screen. Tier 2 builder screens copy this file as their starting point. The sidebar IA, topbar layout, persona-identity chip, persona switcher, and footer are frozen contracts. Production code targeting /portfolio, /project/*, /budget, /draw renders inside this shell.

Do not modify this file without a Tier 1 unlock event per prototype-workflow.md §14.5. Visual identity across all six personas comes from the persona chip and sidebar IA, not from divergent brand accents.