While evaluating xtool for building Expo React Native apps (which is not possible for now), we discovered that the build subcommand exists and can be run, but it is not documented anywhere. Running xtool --help does not list build subcommand, and it is missing from the official documentation. This makes it unclear whether the command is experimental, officially supported, or intended for internal use. We thought it might help others.

Expected Behavior:

• xtool --help should list all officially supported commands, including build subcommand.
• Documentation should include usage instructions, options, and examples for the build command.

Actual Behavior:

• xtool --help does not show build subcommand.
• The documentation does not mention the build subcommand.