PubSub, observer, and typed event emitter (Node and Edge).

String utilities: formatting, casing, trim, slugify (Node and Edge).

Type-safe LinkedList, Queue, Stack, LRU/TTL, MultiMap, BiMap—no full collections lib (Node and Edge).

Debounce, throttle, once, pipe, and compose with TypeScript inference (Node and Edge).

Typed factory builder, singleton factory, and error factory helpers (Node and Edge).

Typed file I/O: readFileUtf8, readFileJson, writeFile, ensureDir for Node.js.

Typed metadata store and annotation helpers for symbols and keys (Node and Edge).

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

Composable design patterns: Result/Either, strategySelector, pipeAsync (Node and Edge).

Backend misc: singleton, debounce, throttle, LRU, polling, intervals, enums, once, memoize (Node and Edge).

Zustand store helpers: factory, persist, devtools, slices (Node and Edge).

Next.js App Router helpers: safe server actions, route handlers, request context, middleware.

Lightweight, type-safe structured logging with correlation context for Node.js and Edge Runtime.

Typed API client with Zod validation, handler registry, and middleware (Node and Edge).

Time utilities: debounce, throttle, interval manager, managed timeout (Node and Edge).

Algorithms: stable merge sort, quick sort, binary search, lower/upper bound (Node and Edge).

Hash, randomBytes, and timing-safe compare for Node.js.

Number utilities: clamp, roundTo, toInt/Float, isInRange, lerp, sum, avg (Node and Edge).

Array utilities: unique, chunk, compact, groupBy, sortBy, flattenOnce (Node and Edge).

AsyncLocalStorage request context (requestId, traceId) for Node.js logging and tracing.