companion-preset-category-file

Create a new src/presets/preset-{category}.ts file exporting a PresetId enum and a GetPresets factory, then import it in presets.ts, call the factory, add the enum to the union type, and spread the result into the combined presets object.

Import the enum and factory with a .js extension, call the factory inside GetPresetList storing the typed result, add the enum to the mapped union type, spread the result into the presets object, and return it cast as CompanionPresetDefinitions.

Do not create a new file when the preset belongs to an existing category. Instead, open the existing preset-{category}.ts file, add the new enum member and preset definition directly, with no aggregator changes needed.

Enum-based preset IDs let TypeScript catch duplicate IDs at compile time, enable IDE rename-refactoring across the codebase, and let the aggregator union type enforce that every enum member is covered in the combined object.

Build failures usually come from adding the spread without the union type entry (or vice versa), missing .js extensions on ESM imports, or forgetting the as CompanionPresetDefinitions cast on the returned presets object.