SDK Capability Matrix - Spatius

This matrix shows capabilities that are documented in the public reference pages. It is a lookup aid, not a replacement for the platform reference pages. If a cell says Not documented, the current docs do not expose a public reference for that capability on that SDK. It does not prove the runtime cannot support it.

Client SDK capabilities

Capability	Web	iOS	Android	Flutter
Direct Mode Integration	Documented	Documented	Documented	Documented
Backend Mode client feed	`yieldAudioData()` / `yieldFramesData()`	`yieldAudioData(_:end:)` / `yieldFramesData(_:conversationID:)`	`yieldAudioData(audioData, end)` / `yieldFramesData(animations, conversationId)`	`yieldAudioData()` / `yieldAnimations()`
RTC client/provider support	`@spatius/avatarkit-rtc`	`AvatarKitRTC` with a public `RTCProvider` abstraction; Agora provider included	`ai.spatius:avatarkit-rtc` with a public `RTCProvider` abstraction; Agora provider included	Not documented
Region config	`region` in `AvatarSDK.initialize()`	`region` in `Configuration`	`region` in `Configuration`	`region` in `Configuration`
Region default	Automatic selection when unset	Automatic selection when unset	Automatic selection when unset	Automatic selection when unset
Audio format scope	`new AvatarView(avatar, container, { audioFormat })`	`AvatarView(avatar:audioFormat:)`	`AvatarView.init(avatar, scope, audioFormat)`	`AvatarWidget(audioFormat:)`
Change audio format on a live view	`controller.setAudioFormat(patch)`	`controller.setAudioFormat(sampleRate:inputAudioFormat:opusBitrate:opusUplinkEnabled:)`	`controller.setAudioFormat(sampleRate, opusBitrate, inputAudioFormat, opusUplinkEnabled)`	`controller.setAudioFormat(...)`
Opus audio input	`inputAudioFormat: 'opus'`	`inputAudioFormat: .opus`	`inputAudioFormat = AudioCodec.OPUS`	`inputAudioFormat: AudioCodec.opus`
Direct Mode Opus uplink	On by default (`opusUplinkEnabled`)	On by default (`opusUplinkEnabled`)	On by default (`opusUplinkEnabled`)	On by default (`opusUplinkEnabled`)
Driving mode enum	`DrivingServiceMode.direct` / `.backend` / `.rtc`	`.direct` / `.backend` / `.rtc`	`DIRECT` / `BACKEND` / `RTC`	`direct` / `backend`
Render quality	`RenderQuality` and `setRenderQuality()`	`RenderQuality` and `setRenderQuality(_:)`	`RenderQuality` and `setRenderQuality()`	`RenderQuality` and `setRenderQuality()`
Render resolution cap	`setRenderResolutionCap()`	`setRenderResolutionCap(enabled:maxHeight:)`	`setRenderResolutionCap(enabled,maxHeight)`	Not documented
Device capability check	`isDeviceSupported()` / `deviceScore()`	`isDeviceSupported()` / `deviceScore()`	`isDeviceSupported()` / `deviceScore()`	Not documented
Frame starvation behavior	`FrameStarvationMode`	`FrameStarvationMode`	`FrameStarvationMode`	Not documented
Strict sync mode	`FrameStarvationMode.strictSync`	`FrameStarvationMode` enum	`STRICT_SYNC` enum value	Not documented
Avatar bitmap export	`AvatarView.exportBitmap()`	Not documented	Not documented	Not documented
Avatar transform / bounds	`avatarTransform`, `getBoundingRect()`	`AvatarView.avatarTransform`, `getBoundingRect()`	`AvatarView.avatarTransform`, `getBoundingRect()`	Not documented
`ConnectionState` callback	Direct Mode only	Documented	Documented	Documented
`ConversationState` callback	Documented	Documented	Documented	Documented
Interrupt playback	`interrupt()`	`interrupt()`	`interrupt()`	Not documented
Pause / resume rendering	`AvatarView.pauseRendering()` / `resumeRendering()`	`AvatarView.pauseRendering()` / `resumeRendering()`	`AvatarView.pauseRendering()` / `resumeRendering()`	Not documented
Cache management	`AvatarManager` cache methods	`AvatarManager` cache methods	`AvatarManager` cache methods	Not documented

Web package split

Package	What it does	Reference
`@spatius/avatarkit`	Core Web AvatarKit SDK for loading, rendering, Direct Mode, and Backend Mode client feed.	Web SDK Reference
`@spatius/avatarkit-rtc`	Web RTC transport adapter for LiveKit and Agora providers.	RTC Adapter

Server SDK capabilities

Capability	Python Server SDK	Go Server SDK	JavaScript Server SDK
Backend Mode session	`new_avatar_session()`	`NewAvatarSession()`	`newAvatarSession()` on Node.js
Region config	`region` option	`WithRegion(region)`	`region` option
Region default	`auto`	`auto`	`auto`
Console endpoint override	`console_endpoint_url`	`WithConsoleEndpointURL()`	`consoleEndpointUrl`
Ingress endpoint override	`ingress_endpoint_url`	`WithIngressEndpointURL()`	`ingressEndpointUrl`
Audio input	PCM / Ogg Opus	PCM / Ogg Opus	PCM / Ogg Opus
Internal PCM to Opus encoder	Optional `spatius[opus]` and `libopus`	Native codec libraries	Bundled WebAssembly encoder
Motion data callback	`transport_frames`	`WithTransportFrames()`	`transportFrames`
Encoded audio callback	`on_encoded_audio`	`WithOnEncodedAudio()`	`onEncodedAudio`
LiveKit egress	`livekit_egress`	`WithLiveKitEgress()`	`livekitEgress`
Agora egress	`agora_egress`	`WithAgoraEgress()`	`agoraEgress`
Interrupt for egress	`interrupt()`	`Interrupt()`	`interrupt()`
Worker warm-up	`prewarm()` with optional TLS warm-up and token prefetch	`Prewarm()` with optional TLS warm-up and token prefetch	`prewarm()` with optional token prefetch
Handshake extensions	`extra_params`	`WithExtraParams()`	`extraParams`
Structured SDK errors	`AvatarSDKError` / `SessionTokenError`	`*AvatarSDKError` for supported failures	`AvatarSDKError` / `SessionTokenError`

See the Python, Go, and JavaScript / TypeScript references for requirements and exact signatures. Error fields and code coverage differ by language. LiveKit and Agora egress are low-level Server SDK capabilities. They are not additional integration paths.

Integration support

Integration	Web	iOS	Android	Flutter	Server-side component
Direct Mode Integration	Yes	Yes	Yes	Yes	Session Token endpoint
LiveKit Agents Integration	Bundled `LiveKitProvider`	`RTCProvider` extension point; native LiveKit provider not bundled	`RTCProvider` extension point; native LiveKit provider not bundled	Not documented	`livekit-plugins-spatius`
Agora Convo AI Integration	Web RTC client	AvatarKit RTC client	AvatarKit RTC client	Not documented	Agora avatar provider or TEN extension
Backend Mode Integration	Client feed	Client feed	Client feed	Client feed	Python, Go, or JavaScript Server SDK

Region support

All documented SDKs and integrations use the same region names:

Region	Status
`us-west`	Supported
`ap-northeast`	Supported
`cn-beijing`	Supported

See Regions for endpoint composition and advanced override notes.