Function getSpec

getSpec<C extends DocumentTypeCode>(code: C): DocumentSpec<C>
Lookup a DocumentSpec by its stable code.

Useful when you need direct access to the spec's regex, mask, country, or confidence metadata without going through the wrapped validate/format helpers. The returned spec is the same singleton instance held in the internal registry; do not mutate it.

Generic over the document type code: passing a literal narrows the returned spec to DocumentSpec<"MX_CURP"> so .code keeps its literal type instead of widening to the whole DocumentTypeCode union. The runtime invariant REGISTRY.get(code).code === code justifies the cast at the boundary.
Type Parameters
- C extends DocumentTypeCode
  The literal DocumentTypeCode of the requested spec.
Parameters
- code: C
  Stable DocumentTypeCode such as "SV_DUI" or "BR_CNPJ".
Returns DocumentSpec<C>
The DocumentSpec<C> registered for code, with a code-narrowed return type for richer IDE inference.
Throws
if code is not registered. Call listSupportedCodes() to inspect the set of known codes.
Example
```
import { getSpec } from "nationid";

const dui = getSpec("SV_DUI");
dui.code;                    // "SV_DUI" — literal, not the whole union
console.log(dui.country);    // "SV"
console.log(dui.confidence); // "moderate"
```
- Defined in index.ts:211