FieldSpace Protocol

An open, language-agnostic protocol for exposing content and interactivity across screen environments.

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What is FieldSpace?

FieldSpace enables channels (external services) to expose capabilities, data, state, and actions to clients (such as ScreenSpace) that render and mediate interaction across diverse surfaces—from televisions and tablets to phones, desktops, and digital signage.

Design Philosophy

FieldSpace is a surface-first protocol, not a tool protocol.

FieldSpace Is	FieldSpace Is Not
Stateful	Stateless RPC
Surface- and media-oriented	Tool- or function-oriented
Supports persistent views	Request-response only
Agent-readable and controllable	Human-only interfaces
Consumer-safe (TV, home, public)	Developer-only tooling
Interaction-adaptive	Single interaction model

Channels expose capabilities, data, state, and actions — not apps.

Quick Example

A minimal FieldSpace channel manifest:

{
  "fieldspace": "0.1",
  "channel": {
    "id": "com.example.weather",
    "name": "Weather",
    "description": "Current weather conditions"
  },
  "capabilities": [
    {
      "id": "current_conditions",
      "type": "data",
      "endpoint": "/api/conditions"
    }
  ]
}

Goals

1. Interaction-adaptive — Works with minimal interaction (remote, voice) but supports rich interaction (touch, keyboard) when available
2. Agent-native — AI agents can discover, reason about, and act on channel capabilities
3. Platform-agnostic — Works on tvOS, Android TV, web, mobile, desktop, signage
4. Channel-agnostic — Any backend technology can implement the protocol
5. Consumer-safe — Designed for home, family, and public environments

Specification

Document	Description
Concepts	Core terminology and conceptual model
Capabilities	Capability declaration and discovery
Data & State	Data access and state inspection
Actions	Action model and invocation
Views	Optional view layer (advisory)
Permissions	Permission and trust model
Versioning	Versioning and compatibility

License

This specification is released under CC BY 4.0.

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FieldSpace Protocol v0.1.0 — Draft