is there an api for hooking into new apple intelligence features?

Yes, there are APIs available for integrating new Apple Intelligence features into your apps. Apple has introduced several new APIs and frameworks to help developers tap into these capabilities:

1. App Intents Toolbox: This allows apps to expose their capabilities to Apple Intelligence, enabling deeper integration into system experiences. This includes making your app's data and capabilities accessible to Siri and the Shortcuts app (Platforms State of the Union).

2. Writing Tools: These tools help users rewrite, proofread, and summarize text. If your app uses standard UI frameworks to render text fields, it will automatically get these writing tools. You can also customize their behavior using the new textview Delegate API (Platforms State of the Union).

3. Image Playground API: This API allows for easy integration of image creation features into your apps without needing to train your own models (Platforms State of the Union 5-Minute Recap).

4. Vision Framework: This framework provides capabilities for visual intelligence, including text extraction, face detection, body pose recognition, and more. A new Swift API with Swift 6 support for Vision is also introduced this year (Explore machine learning on Apple platforms).

5. Machine Learning Frameworks: These include APIs for natural language processing, sound analysis, speech understanding, and vision intelligence. You can also use Create ML to bring in additional data for training and import and run on-device AI models (Platforms State of the Union).

For more detailed information, you can refer to the sessions mentioned above.