Manten provides a minimal, async-first testing API for Node.js: standalone test and describe imports, AsyncLocalStorage-backed context, snapshot helpers, hooks (onTestFail, onTestFinish, onFinish), and flexible concurrency controls. It's designed for lightweight projects that want straightforward, composable tests without a heavy runner.
Use Manten for small-to-medium Node projects where fast iteration, simple APIs, and async concurrency are important. Ideal when you want tests to run immediately (no separate collection phase), adapt concurrency to CPU, and use snapshot testing with minimal configuration.
test, describe, expectSnapshot, concurrency options, timeout/retry patterns, and recommended project structure.Works with developer-focused agents and CI systems that execute Node.js tests (Node 22.6+). Useful for agents that bootstrap test runs, collect snapshots, and parse exit codes for reporting.
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