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Stainless CodeOpen-source tooling for JS/TS and AI agents.

Typed libraries with sharp contracts — for developers shipping modern apps, and for agents that need reliable structure instead of platform glue.

Browse librariesView on GitHub

Why Stainless Code.

How we ship open-source TypeScript and JavaScript libraries — without the platform pitch.

  1. 01

    Sharp contracts.

    Public APIs you can pin and reason about. Clear surfaces beat sprawling frameworks.

  2. 02

    Independent libraries.

    Pick what you need. MIT-licensed, no forced stack, no platform lock-in.

  3. 03

    Built for agents too.

    Machine-readable docs and predictable packages where agents work — not just humans reading guides.

Browse the libraries.

Open-source packages under Stainless Code. Open a card for docs, source, and npm — or see the full product index.

Codemap

Local SQLite index for agents — SQL and recipes instead of scanning the tree.

Persist

Any store, any storage — one middleware, no hydrate flash.

Layers

Headless modal/dialog/drawer/popover/toast manager — open any layer from anywhere.

Start with a library.

Read how we ship open-source tooling — or jump straight into the GitHub org and pick a package.

About Stainless CodeGitHub org