# agy > An agentic development platform by Google. > More information: . - Open a specific file or directory: `agy {{path/to/file_or_directory}}` - Compare two files with each other: `agy {{[-d|--diff]}} {{path/to/file1}} {{path/to/file2}}` - Pass in a prompt to run in a chat session in the current working directory: `agy chat "{{prompt}}"` - Install or uninstall a specific extension: `agy --{{install|uninstall}}-extension {{publisher.extension|path/to/extension.vsix}}` - Add an MCP (Model Context Protocol) server definition to the user profile: `agy --add-mcp "{{json_string}}"` - Display help: `agy {{[-h|--help]}}`