Set your OpenAPI file's info.title to your pluginID like so,
info: # your pluginId title: catalog
Find or create a new plugin to house your new generated client. Currently, we do not support generating an entirely new plugin and instead just generate client files.
Run yarn backstage-repo-tools package schema openapi generate --client-package <directory>. This will create a new folder in <directory>/src/schema/openapi/generated to house the generated content.
You should not need to import anything from subfolders of the src/schema/openapi/generated parent folder, everything you should require will be accessible from the src/schema/openapi/generated/index.ts file. Of note,
DefaultApiClient - this is the client that you can use to access your specific spec.
Any request or response types - these will be available from the index and should match the names in your spec.