Terratest is a Go library for writing real integration tests against Terraform modules. It deploys actual infrastructure, validates it, then destroys it — covering terraform, http_helper, aws, retry, and test_structure packages with complete Go code examples.
Zustand is a 1KB React state management library. One create() call handles state and actions, no Provider wrapping needed, selectors prevent unnecessary re-renders, with built-in persist, devtools, and immer middleware.
ky is a tiny fetch-based HTTP client — 4KB gzip, zero dependencies. Built-in retry with exponential backoff, timeout, hooks (like interceptors), JSON shorthand. 3x smaller than axios, half the code of raw fetch.
Zod is a TypeScript-first schema validation library. Define a schema once, get runtime validation and TypeScript types automatically. Supports parse/safeParse, transform, refine, discriminated union. 2kb gzip, zero dependencies.
Biome is a Rust-based frontend toolchain that formats 35x faster than Prettier, includes 455 lint rules covering ESLint + TypeScript ESLint, and replaces five config files with one biome.json. Auto-migration included.
Mole is a 38K-star macOS cleaner. mo clean removes caches deep in the system, mo uninstall removes apps plus all leftover files, mo purge clears node_modules and build artifacts. Free, open-source, dry-run safe.
Lefthook is a fast Git hooks manager written in Go. One YAML file replaces Husky + lint-staged, parallel execution cuts commit wait time in half, with built-in monorepo support and local config overrides.
OpenSpec is a spec-driven development framework. Before AI writes code, align on requirements first. Propose generates spec documents, apply implements by spec, archive records completed changes. Supports Claude Code, Cursor, Copilot, and 30+ tools.
Use sql.js-httpvfs to query SQLite databases hosted on static sites via HTTP Range Requests — no need to download the entire database file.
Compare browser-side storage solutions including sql.js, IndexedDB, and localStorage by capacity, query capabilities, performance, and use cases.
