Cross-runtime skills for Claude Code, Codex, and multi-agent workflows.

A signal implementation for Luau

Cross-runtime thin api wrapper around better-sqlite3/node:sqlite/bun:sqlite

Type-safe environment variables for TypeScript. Zero-dependency .env loader and parser with one API across Node, Bun, Deno, Cloudflare Workers, and the Browser. Decorators, converters, Standard Schema (zod/valibot/arktype) validation, and much more.

☔️ The world's first V8 and JSC coverage tool to generate reports for Node.js, Bun, Deno, and TypeScript at the same time.

CLI micro-benchmarking for Node, Deno, and Bun with nonparametric statistics and significance testing.

Run OS and shell commands using template tag functions. Same API in Node, Deno, and Bun. Web streams, TypeScript typings, zero dependencies.

Minimal cross-runtime test runner. Zero dependencies. Works on Node.js, Deno, Bun, Workers, and browsers.

Process-isolated test runner for tape-six. Runs each test file in its own subprocess. Works with Node, Deno, and Bun. Supports TypeScript without transpilation.

TAP-inspired unit test library for Node, Deno, Bun, and browsers. ES modules, TypeScript, zero dependencies.

⚙️ Cross-Platform JavaScript/TypeScript Runtime Adapter.

Cross-runtime platform directories for Node.js and Bun.

🛠️ One tool to manage all runtimes, package managers 📦️ and much more (git, docker, ...).

Playwright-based browser test runner for tape-six. Runs each test file in its own iframe inside headless Chromium. Works with Node, Deno, and Bun.

Puppeteer-based browser test runner for tape-six. Runs each test file in its own iframe inside headless Chrome. Works with Node, Deno, and Bun.

An open-source authentication library for TypeScript. Supporting OAuth 2.0. Developer-friendly. Secure by default.

ZIP and TAR archive reader/writer for JavaScript runtimes with safety checks and streaming entry access.

Composable primitives and config-driven runners that replace scattered shell scripts with type-safe, structured tooling

Cross-runtime implementation of WebSql api backed by better-sqlite3 and bun:sqlite

A curated collection of cross-runtime JavaScript compatibility and behavior tests