Thriving 
TS 
HT MIT · The Brazilian data toolkit for TypeScript — validate 18 document types and query 17 government datasets (IBGE, Bacen, CNAE, NCM, CFOP, Incoterms…) entirely offline. Zero runtime deps, tree-shakeable, never throws.
https://www.npmjs.com/package/@br-validators/core ↗// readme
100% open-source (MIT) monorepo — TypeScript library, terminal CLI, and web playground for formatting and validating Brazilian document identifiers. Algorithms trace to official primary sources (Receita Federal, Bacen, CONTRAN, Correios, SEFAZ).
🚀 Playground interativo: experimente no navegador em open-data-brazil.github.io/br-validators — validação 100% client-side sem envio de dados, com gerador de testes, temas claro/escuro e consultas offline.
| Surface | Package / URL |
|---|---|
| Library | @br-validators/core — br-validators-core-<version>.tgz on GitHub Releases |
| CLI | @br-validators/cli — br-validators-cli-<version>.tgz on GitHub Releases |
| Zod | @br-validators/zod — br-validators-zod-<version>.tgz on GitHub Releases |
| React Hook Form | @br-validators/react-hook-form —… |