Use the app manifest system to quickly create, configure, and reuse Slack app configurations. Manifests are YAML or JSON-formatted configurations bundles for Slack apps. With a manifest, you can use a UI or an API to create an app with a pre-defined configuration, or adjust the configuration of existing apps. You can share and reuse your manifests. Use this capability to create development clones
![Create and configure apps with manifests](https://cdn-ak-scissors.b.st-hatena.com/image/square/c9bf2b7d09dea24cef89b3381720b312dd379eb4/height=288;version=1;width=512/https%3A%2F%2Fa.slack-edge.com%2F80588%2Fimg%2Fservices%2Fapi_200.png)