A fully typed error handling library for TypeScript inspired by Rust's Result type.

Typed error hierarchy shared across factory layers

A class designed to enable easily extending the built-in javascript Error, allowing typed errors.

The framework core: config loading with full precedence, a dependency-injection container, typed error classes, and the inbuilt HTTP server.

Shared HTTP error taxonomy for Easyweb microservices: typed error classes with machine-readable codes, and the express error-handling middleware that serializes them

Reactive session state with role and permission checks, declarative access-control boundaries, and a typed error model.

Multi-tenancy plugin — ships the `tenant()` schema mixin (auto-scopes reads, fills tenantId on inserts) plus the `assertOwnTenant` write-guard and `TenantMismatch` typed error.

Shared contract types, fixed validation-error shape, and typed error guards for zodapi

HL7v2 acknowledgment message builder and typed error classes

Create typed error classes with error codes, cause chains, and type guards

Structured exception handling with HTTP status code mapping, typed error data, and JSON-formatted stack traces for consistent error reporting

Typed error hierarchy, Result type, and branded primitives — the zero-dependency foundation every @firstprinciples package builds on.

Typed error classes, error codes, and serializeError for logging and RPC (Node and Edge).

Opinionated HTTP client library with Axios and Undici adapters, consistent response structure, built-in retry logic, and typed error handling for TypeScript applications

Centralized typed error management library for ExpressJS with Zod/Joi/JWT/express-validator and DB (Prisma/Mongoose/Sequelize) support & graceful shutdown

A comprehensive HTTP error handling library for Node.js applications with typed error classes and standardized error responses.

Typed error classes (AppError & subclasses).

Typed error catalog for NestJS — RFC 7807 responses, automatic Swagger integration, zero boilerplate

Structured exception handling with HTTP status code mapping, typed error data, and JSON-formatted stack traces for consistent error reporting

Structured error base class with typed error codes and shared error codes