Update README.md (#194)

README.md

@@ -13,12 +13,18 @@ resources at scale.
 Please refer to the [install guide](https://developer.hashicorp.com/hcp/docs/cli/install) for
 detailed install instructions.
 
-
 ## Documentation
 
 For getting started instructions, see the HCP CLI [documentation](https://developer.hashicorp.com/hcp/docs/cli).
 For a complete list of commands, see the [command reference](https://developer.hashicorp.com/hcp/docs/cli/commands).
 
+## Version Support
+
+The `hcp`  CLI is currently under development, at major version zero (0.y.z) and 
+changes may occur at any time. We do not provide support for previous versions. 
+If you encounter any issues with the software, we recommend upgrading to the 
+latest version.
+
 ## Contributing
 
 See the [`contributing`](contributing/) directory for more developer documentation.