Meta for Developers

# Meta Developer Platform > Documentation and resources for building on Meta platforms. ## llms.txt Files ### Horizon OS (Quest, mixed reality, and spatial computing) - [Unity](https://developers.meta.com/horizon/llmstxt/documentation/unity/llms.txt/) - Unity-specific guides, APIs, and examples - [Unreal Engine](https://developers.meta.com/horizon/llmstxt/documentation/unreal/llms.txt/) - Unreal-specific guides, APIs, and examples - [Meta Spatial SDK](https://developers.meta.com/horizon/llmstxt/documentation/spatial-sdk/llms.txt/) - Spatial SDK guides, APIs, and examples - [Android Apps](https://developers.meta.com/horizon/llmstxt/documentation/android-apps/llms.txt/) - Android-specific guides and APIs - [Native C++](https://developers.meta.com/horizon/llmstxt/documentation/native/llms.txt/) - Native development guides and APIs - [Web](https://developers.meta.com/horizon/llmstxt/documentation/web/llms.txt/) - Web development guides and APIs - [Design](https://developers.meta.com/horizon/llmstxt/design/llms.txt/) - Design guidelines and patterns - [Policy](https://developers.meta.com/horizon/llmstxt/policy/llms.txt/) - Developer policies and guidelines - [Resources](https://developers.meta.com/horizon/llmstxt/resources/llms.txt/) - Developer resources and tools ### Wearables (Ray-Ban Meta smart glasses and wearable devices) - [Wearables](https://wearables.developer.meta.com/llms.txt) - Wearables development guides and APIs ## Other Resources (not llms.txt files) - [Llama](https://llama.developer.meta.com/) - Llama AI models and APIs - [Facebook Developer Docs](https://developers.facebook.com/docs/) - Facebook platform documentation - [Horizon Worlds Learn](https://developers.meta.com/horizon-worlds/learn) - Horizon Worlds documentation