# Checkout extensions (Legacy)

> Archived documentation for legacy Shoplazza checkout extensions built with the shoplazza checkout command, kept for apps that have not migrated yet.

:::caution Legacy Docs
This directory archives the legacy checkout extension development docs based on the `shoplazza checkout` command. For the new development workflow, see [Build Checkout Extensions](/docs/app/extensions/checkout/add-checkout-extension); for the reference manual, see [Checkout Extension Reference](/docs/app/extensions/checkout/extension-reference).
:::

## Retained Pages