@loanscope/domain

Branded primitive types (Money, Ratio, RatePct, Months, Units, Fico), enums (LoanType, LoanPurpose, Occupancy, PropertyType, ProgramKind, AmortizationType, Channel, etc.), and canonical model interfaces (ProductDefinition, Transaction, Scenario, Borrower, IncomeStream, ProgramRules) that together form the type-level contract for every other LoanScope package.

Zero runtime dependencies by design. The package is the kernel that every other LoanScope package consumes; it must remain pure types plus a small set of brand-constructor helpers (money(n), ratio(n), ratePct(n), months(n), assertNever).

Install

pnpm add @loanscope/domain

Usage

import { money, ratio, LoanPurpose, type Transaction } from "@loanscope/domain";

const loanAmount = money(500_000);
const ltv = ratio(0.8);
const purpose = LoanPurpose.Purchase;

Changelog

See CHANGELOG.md for per-package release history.

Part of the LoanScope monorepo

See the repository root for the full list of @loanscope/* packages, the underwriting engine, and the CLI.

License

MIT