# Synheart

> Developer documentation for Synheart SDKs, protocols, and tools.

## Docs

- [Introduction](/introduction.md): Privacy-preserving, human-state-aware AI from biosignals
- [Quickstart](/quickstart.md): Build your first emotion-aware app in 5 minutes
- [Synheart Core SDK Overview](/synheart-core/overview.md): Unified SDK for human-state intelligence — single integration point for all Synheart features
- [Synheart CLI](/synheart-cli.md): Main CLI for local development - generates mock HSI data streams for SDK testing
- [Human State Interface (HSI)](/hsi/overview.md): A contract-only, language-agnostic JSON payload for exchanging human-state signals (HSI 1.0)
- [Synheart Wear Overview](/synheart-wear/overview.md): Unified wearable SDK for streaming biometric data across devices and platforms
- [Synheart Wear - Dart/Flutter SDK](/synheart-wear/dart.md): Cross-platform wearable SDK for Flutter apps (iOS + Android)
- [Synheart Wear - Kotlin/Android SDK](/synheart-wear/kotlin.md): Native Android SDK with Health Connect integration
- [Synheart Wear - Swift/iOS SDK](/synheart-wear/swift.md): Native iOS SDK with HealthKit integration
- [Synheart Wear CLI](/synheart-wear/cli.md): Local development server with OAuth (WHOOP, Garmin, Fitbit), webhooks, and ngrok.

- [Synheart Core - Dart/Flutter SDK](/synheart-core/dart.md): Unified SDK for human-state intelligence in Flutter applications
- [Synheart Core - Android/Kotlin SDK](/synheart-core/kotlin.md): Unified SDK for human-state intelligence in Android applications
- [Synheart Core - iOS/Swift SDK](/synheart-core/swift.md): Unified SDK for human-state intelligence in iOS applications
- [Synheart Core Architecture](/synheart-core/architecture.md): Deep dive into the Core SDK module system and HSI Runtime
- [Human State Vector (HSV)](/synheart-core/hsv-specification.md): Internal Human State Vector (HSV) model used by Synheart Core (axes, indices, embeddings, windows)
- [HSI (Synheart Core)](/synheart-core/hsi-specification.md): How Synheart Core exports HSV as HSI 1.0 payloads (and consumes HSI for interoperability)
- [Capability System](/synheart-core/capability-system.md): Access control enforcement for Synheart Core features based on app identity and authorization level
- [Consent System](/synheart-core/consent-system.md): User permission management and privacy boundary enforcement across all Synheart Core modules
- [Cloud Protocol](/synheart-core/cloud-protocol.md): Secure, consent-gated upload protocol for HSV snapshots (HSI 1.0 format) to the Synheart Platform
- [Synheart Emotion Overview](/synheart-emotion/overview.md): On-device emotion inference from biosignals with privacy-first design
- [Synheart Emotion - Python SDK](/synheart-emotion/python.md): On-device emotion inference for Python applications
- [Synheart Emotion - Dart/Flutter SDK](/synheart-emotion/dart.md): On-device emotion inference for Flutter applications
- [Synheart Emotion - Kotlin/Android SDK](/synheart-emotion/kotlin.md): On-device emotion inference for Android applications
- [Synheart Emotion - Swift/iOS SDK](/synheart-emotion/swift.md): On-device emotion inference for iOS applications
- [Synheart Behavior Overview](/synheart-behavior/overview.md): On-device behavioral signal inference from digital interactions with privacy-first design
- [Synheart Behavior - Dart/Flutter SDK](/synheart-behavior/dart.md): On-device behavioral signal inference for Flutter applications
- [Synheart Behavior - Kotlin/Android SDK](/synheart-behavior/kotlin.md): On-device behavioral signal inference for Android applications
- [Synheart Behavior - Swift/iOS SDK](/synheart-behavior/swift.md): On-device behavioral signal inference for iOS applications
- [Synheart Focus Overview](/synheart-focus/overview.md): On-device cognitive load inference from biosignals with privacy-first design
- [Synheart Focus - Dart/Flutter SDK](/synheart-focus/dart.md): On-device cognitive load inference for Flutter applications
- [Synheart Flux Overview](/synheart-flux/overview.md): On-device compute engine for transforming wearable and behavioral data into HSI-compliant signals
- [Synheart Sensor Agent Overview](/synheart-sensor-agent/overview.md): Privacy-first PC background sensor for behavioral research from keyboard and mouse interactions
- [Guides Overview](/guides/overview.md): Comprehensive guides for using Synheart
- [Troubleshooting](/guides/troubleshooting.md): Common issues and solutions for Synheart SDKs
- [FAQ](/guides/faq.md): Frequently asked questions about Synheart SDKs

## Optional

- [Platform](https://platform.synheart.ai): Synheart platform dashboard.
- [GitHub](https://github.com/synheart-ai)
- [Feedback](https://feedback.synheart.ai)