Reactive state store with observable subscriptions and microtask-coalesced render scheduling. Allows partial state updates, in-place mutation, and safe subscription removal mid-iteration. Could be extracted as a lightweight state library for DOM-based widgets.

Provides an `anew` helper that constructs an object and automatically calls its async `ctor` method. Solves the problem of async initialization in constructor-based classes cleanly, avoiding the need for factory functions or `init()` methods. Minimal and reusable.

Exports `chunkIntoBatches` for splitting arrays into fixed-size batches. Generic, zero-dependency utility that handles error cases (non-array, negative chunk size). Immediately reusable in any TypeScript project.

Implements a deep merge function with array handling (atomic replacement or element-wise merge). Handles nested objects, null/undefined values, and type mismatches. Useful for merging configuration objects recursively. Self-contained.

Merkle tree construction for browser fingerprint components, enabling selective disclosure proofs. Uses SHA-256 hashing. Can be extracted for generic Merkle proof generation with minimal dependencies (@noble/hashes).

Load-balancer that fetches and caches a provider list (dual-stack IPv4/IPv6), selects a random provider by weight, and excludes failed providers. Handles network errors gracefully and supports single-fetch caching. Pattern is reusable for any service that needs to distribute load across a list of endpoints.