## Reference

Detailed reference material on Gadget concepts and packages.

[ggt, the Gadget CLI](https://docs.gadget-canary.xyz/reference/ggt)

Command line tool for building your Gadget app locally.

[Gelly](https://docs.gadget-canary.xyz/reference/gelly)

Gadget's high-performance query language.

[Metadata files](https://docs.gadget-canary.xyz/reference/metadata-files)

Gadget metadata file definitions.

##### Packages

[gadget-server](https://docs.gadget-canary.xyz/reference/gadget-server)

Utilities for implementing your Gadget app's backend.

[@gadgetinc/react](https://docs.gadget-canary.xyz/reference/react)

React library for calling your Gadget backend.

[@gadgetinc/preact](https://docs.gadget-canary.xyz/reference/preact)

Preact library for calling your Gadget backend.

[@gadgetinc/react/auto](https://docs.gadget-canary.xyz/reference/react/auto)

React library for Gadget's autocomponents.

[@gadgetinc/react-shopify-app-bridge](https://docs.gadget-canary.xyz/reference/shopify-app-bridge)

Handles automating Shopify OAuth and App Bridge initialization.

[@gadgetinc/shopify-extensions](https://docs.gadget-canary.xyz/reference/shopify-extensions)

Utilities to help you build Shopify extensions.

[@gadgetinc/react-bigcommerce](https://docs.gadget-canary.xyz/reference/react-bigcommerce)

Utilities for BigCommerce single-click app OAuth and session management.

[@gadgetinc/react-chatgpt-apps](https://docs.gadget-canary.xyz/reference/react-chatgpt-apps)

Utilities and hooks for interacting with window.openai and making authenticated requests from ChatGPT apps.