file-type-defaults

Set default applications for file types on macOS using the utiliti command-line tool with either a sample file or UTI method. Use `utiliti file set /path/to/file.<extension> <bundle-id>` to assign an app to a file extension, or retrieve the UTI for more precise control over type associations.

A UTI (Uniform Type Identifier) is macOS's system for identifying file types beyond extensions. Use UTI-based assignment when extensions alone don't capture the full type, when handling dynamic types, or when you need more granular control over which applications can open specific file formats.

Retrieve an application's bundle ID using osascript, which queries the system for accurate identifiers needed to assign file-type handlers. The Skill uses osascript to automate this lookup, ensuring you target the correct app when configuring file associations.

Yes, you can automate file-type association configuration by scripting multiple utiliti commands for different extensions or UTIs. The Skill handles both file-based and UTI-based methods with verification steps, letting you apply defaults across file types systematically.

The Skill includes verification steps to confirm new file associations took effect. If defaults don't apply, check that utiliti is installed, the bundle ID is correct, and the application supports that file type on your macOS version.

The file-based method works with existing files or sample files you create temporarily. Use `touch /tmp/sample.<extension>` to generate a sample file when you don't have an actual file of that type to reference for setting defaults.