Bantai – TypeScript-first policy library for rule-based decisions

Summary: Bantai is a type-safe policy evaluation library built with TypeScript and Zod that enables complex validation and decision-making through composable rules and policies. It ensures end-to-end type safety and supports diverse use cases such as access control, rate limiting, and feature gating.

What it does

Bantai allows developers to define reusable, composable policies and rules with strong TypeScript typing, enabling flexible, framework-agnostic rule-based validation and decision logic.

Who it's for

It is designed for developers needing a structured, type-safe way to implement rule-based decisions across APIs, backends, or edge environments.

Why it matters

Bantai solves the problem of scattered business logic by providing a clean, reusable approach to policy and rule management with full type safety.