Enterprise TypeScript Capstone

Design the types for a multi-tenant support and billing platform with real production constraints.

60 min

4 sections

capstone

multi-tenant

architecture

practice

01. Capstone Scenario

Section 1 of 4

You are building a multi-tenant support and billing platform. The system has organizations, users, tickets, invoices, audit events, role-based permissions, typed API clients, and a shared domain package used by web, worker, and API services.

typescript

type CapstoneScope = {
  tenants: "organizations";
  apps: readonly ["web", "api", "worker"];
  domains: readonly ["support", "billing", "audit", "identity"];
  safetyGoals: readonly [
    "tenant isolation",
    "typed external boundaries",
    "exhaustive workflows",
    "stable package declarations"
  ];
};

Type-level Tests and Contract Governance

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