Zod-based validation utilities: schema coercion, AI-readable error formatting, and CLI arg conversion

Zod request validation helpers with pretty error formatting for Node API projects.

Pyreon DX layer over Standard Schema — withField metadata, reactive parse, i18n-aware error formatting. Works with Zod, Valibot, ArkType, or any Standard Schema-compliant validator.

Pearl.js validation — Zod-powered FormRequest, validation pipes, and error formatting

Lightweight library for modern Error formatting

TypeScript client for the Quire API — typed endpoints, OAuth helpers, error formatting.

Collection of text utility functions for error formatting, template replacement, chunking, slugification, duration formatting, YAML/JSON conversion, link generation, and file tree rendering.

An express gateway plugin and policy for app error formatting and management

Error-formatting plugin for @youneed/cli: pretty stderr output, hints, and optional stack traces via the onError lifecycle hook.

express middleware and fluent API to standardize REST API responses and error formatting

Framework-agnostic form core for @ez-kit/form — field types, select options and error formatting (built on TanStack Form).

Date formatting and parsing

Standardized API response wrapper for NestJS with pagination, error formatting, and success responses

This packages is a collection of utilities and helper functions

ESLint rules for formatting jest tests

just emit 'log' events on the process object

The Astro language server, implement the [language server protocol](https://microsoft.github.io/language-server-protocol/)

Compare, format, diff and serialize any JavaScript value

Formatting Date objects as strings since 2013

A moment.js plugin for formatting durations.