ForwardAgentKit - herrkaefer

An agent harness that runs inside iOS and macOS apps, with Swift APIs, multiple AI capabilities, and built-in UI components.

Supports iOS 17+ and macOS 14+.

What it does

In-app agent harness. Runs the agent workflow inside the app, coordinating model responses and tool execution. Manages saved conversations, context compaction, cancellation and queued follow-ups.
Swift APIs. Lets apps manage agents, supply task context and register their own domain tools. AI capabilities can be called directly from app workflows or exposed as agent tools.
Multiple AI capabilities. Provides text generation, image understanding and generation/editing, transcription, speech synthesis, music and video generation, web search and extraction, embeddings and structured decisions. Providers and model priorities can be configured independently for each capability.
Built-in UI components. Reusable SwiftUI components for conversations and provider/model settings, with interactive choices and drafts, attachments, media previews, playback and sharing.

Apps supply their domain tools and control credentials, data and permissions. Model inference uses configured cloud providers or a local model server. Available capabilities depend on the provider, model and account.

Apps using it

Linberry

An iOS language-learning app with context-aware tutoring, translation and reply drafting. It saves learning points for flashcards and exercises, provides pronunciation and podcast lessons, and supports selected-text learning through an iOS action extension.

The learning point sheet generated from the serendipity query, showing translation, meanings and usage notes. — Open the saved learning point for structured meanings, usage notes and pronunciation.

A real Linberry conversation with a generated illustration comparing serendipity and luck. — Use an illustrated comparison to make similar words easier to remember.

An existing Linberry podcast covering eight learning points, actively playing with progress and follow-along dialogue. — Listen to a saved eight-point Podcast, with playback progress and highlighted follow-along dialogue.

Violet

A native iOS and macOS agent app for using the component’s AI capabilities in a conversation. It supports file attachments, image and audio tools, music and video generation, web research, media playback and saved conversation artifacts.

Violet's AI services screen listing text, image, speech, music, video, web and other capabilities. — Configure AI capabilities independently, from text and images to audio and web tools.

Violet's text-to-speech settings with Microsoft Edge and OpenAI providers and an ordered model list. — Set model priority across providers for each capability; speech synthesis is shown here.

Both apps are in development. App workflow screenshots were captured from a physical iPhone through iPhone Mirroring, using real queries and generated results, plus an existing multi-point Podcast. Violet settings screenshots use an iOS Simulator with sample provider configurations. Swipe or use the arrows to browse; click an image to enlarge it.