A full-stack demo scaffold for a Rebolt-style internal app runtime. It turns messy spreadsheet data plus a plain-English workflow prompt into a governed app spec, then runs that spec through deterministic APIs, workflow actions, audit logs, mock connectors, and trace views.

apps/
  web/      Next.js product surface
  engine/   Mastra-oriented AI workflow service shell
packages/
  spec/     Zod schemas for AppSpec, roles, workflows, and connectors
  runtime/  Deterministic workflow execution helpers
  db/       Drizzle schema and Neon Postgres client
  fixtures/ Loom-ready seed CSV and app spec

pnpm install
pnpm dev
pnpm check
pnpm db:generate

Local services:

• Web app: http://localhost:3000
• Engine shell: http://localhost:4111

1. Keep packages/spec as the contract for generated app specs.
2. Put deterministic workflow and permission behavior in packages/runtime.
3. Add Drizzle migrations in packages/db.
4. Use apps/engine for Mastra agents, workflows, tools, and trace persistence.
5. Use apps/web for Builder, Generated App, Engine Room, and CopilotKit surfaces.