Tobias Herber

Minimalist state management

TypeScript client for Object Storage Service

Minimalist frontend framework

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Generate consistent, unique shadow IDs based on input data. Combines SHA256 hashing, base62 encoding, and timestamp extraction for deterministic ID generation.

Opinionated testing utilities for Vitest configuration, environment loading, Prisma test databases, factories, and HTTP helpers.

Ensure a function is called only once, returning the cached result on subsequent calls. Useful for initialization functions or expensive operations that should run exactly once.

Wrap service methods with OpenTelemetry tracing. Automatically creates spans for each method call with error tracking and status reporting.

> Tiny function that tells you when the document is ready.

Track and manage execution context for requests, scheduled jobs, and background tasks. Provides type-safe context objects for different execution environments with support for parent-child relationships.

Route multiplexer for API endpoints. Dispatches requests to different services based on domain, path, and HTTP method with support for fallback handlers.

Generate URL-friendly slugs with collision detection. Automatically handles uniqueness and provides short ID generation with random padding.

Comprehensive validation framework with composable validators and modifiers. Define schemas with full TypeScript support and get detailed error messages.

Normalize email addresses to their canonical form. Handles Gmail dots, plus-addressing, and domain variations to prevent duplicate accounts.

Encryption utility for securely encrypting and decrypting secrets using entity-specific passwords. Uses SHA-512 for key derivation and provides a simple API for secret management.

Cryptographic hash functions using Web Crypto API. Returns base62-encoded hash strings for compact, URL-safe representations.

Canonicalize JSON according to RFC 8785 standard for deterministic serialization. Ensures consistent JSON representation regardless of key order, essential for signing and hashing.

Base62 encoding and decoding utility for converting strings and byte arrays into URL-safe, compact representations. Useful for shortening IDs, creating readable tokens, or encoding binary data.

Type-safe environment variable validation. Ensure required environment variables exist and have proper types at application startup.

Multi-layer caching with Redis and in-memory LRU cache. Supports tag-based invalidation, dynamic TTL, and local-only caching for optimal performance.

Redis client utilities with automatic reconnection, lazy initialization, and Redis Streams support. Simplifies Redis connection management with exponential backoff and error handling.

Enhanced serialization using SuperJSON to handle complex types that standard JSON cannot encode. Preserves Maps, Sets, Dates, and other non-standard JSON types.

Get geolocation information for IP addresses. Retrieves country, city, timezone, coordinates, ASN, and organization data from the geojs.io API.

Access a comprehensive timezone information database. Provides timezone names, codes, UTC offsets, and labels for all major timezones.

Distributed cron job scheduler using BullMQ and Redis. Schedule recurring tasks with cron expressions that run reliably across multiple instances.

Type-safe RPC client for making remote procedure calls. Provides automatic serialization, error handling, and request memoization.