# @blade-and-brawn/domain

Shared models, enums, and utility functions with no dependencies on any other
workspace package — used by `packages/calculator`, `packages/commerce`,
`apps/api`, and `apps/portal` to avoid duplicating core types.

## Exports

### Models (`src/models.ts`)

- `Attribute` — `Strength` / `Power` / `Endurance` / `Agility`
- `Activity` — `BackSquat` / `Deadlift` / `BenchPress` / `Run` / `BroadJump` / `ConeDrill`
- `Gender` — `Male` / `Female`
- `Metrics` / `Player` / `ActivityPerformance` — typebox schemas + types for a
  player's age/weight/gender and their performance on a given activity

### Utils (`src/utils.ts`)

- Unit conversions: `lbToKg`, `kgToLb`, `minToMs`, `secToMs`, `msToMin`,
  `ftToCm`, `inToCm`, `cmToIn`, `msToTime`
- `range(length)`, `clamp(x, lo, hi)`
- `parseRetryAfterMs(header, defaultMs)` — parses a `Retry-After` header
  (seconds or HTTP date) for backoff, used by the Printful/Webflow clients
- `RateLimitError` — thrown by `packages/commerce` clients on HTTP 429