Route Handlers (Vercel Functions): /api/health, /api/estimates (single-source estimate math, ore), /api/catalog, /api/sources (legal sourcing map). sql/001_init.sql = full docs/03 data model (entities + bridge_provenance + platform tables, pgvector). Ready to wire Vercel Postgres. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>