bun

Master the Bun all-in-one toolkit — runtime, package manager, test runner, and bundler. Use when writing, running, testing, or bundling TypeScript/JavaScript with Bun. Triggers on "bun", "bunx", "bun install", "bun test", "bun run". If the user asks to 'write tests' without specifying the type, you MUST ask 'Unit, E2E, or both?' before proceeding.