This is a reference guide for iOS developers working with Core Spotlight and NSUserActivity, two Apple frameworks that make app content searchable and enable Siri predictions. The key insight here is the distinction: Core Spotlight indexes all your app's content for search, while NSUserActivity marks what the user is currently doing for predictions and Handoff. If you're building an iOS app and want your content showing up in Spotlight or need Siri to suggest your app at the right time, this reference covers both APIs in one place. With 948 stars and 166 installs, it seems to be filling a real need for developers who don't want to juggle Apple's separate documentation for these related features.
npx skills add https://github.com/charleswiltgen/axiom --skill axiom-core-spotlight-ref