Cratis.Scene.Model 5.4.2

Cratis Scene

Cratis Scene is a UI model and runtime for developers building platform-independent, Screenplay-based user interfaces.

Describing a user interface without describing a platform — Scene is the UI model of the Cratis model-first layer.

The object model and runtime for Screenplay-based UIs: Scene.Model (platform-agnostic screens, layouts, forms, contribution points, ui profiles and themes), Scene.Engine (binding/resolution runtime), and Scene.React (the React renderer).

Packages / Deployables

.NET support

Cratis.Scene.Model and Cratis.Scene.Engine target .NET 10 and .NET 11. .NET 8 and .NET 9 are no longer supported. Building from source requires the .NET 11 SDK selected by global.json. Specifications run on .NET 11 by default; CI also runs both library specification projects on .NET 10.

Builds

Description

Scene owns the object model and runtime half of the Screenplay stack. In the model-first pipeline, Screenplay describes an event-sourced, CQRS system, Stage renders it into a running application, and Scene is how that application's user interface is described — independently of any rendering platform.

Scene.Model is the platform-agnostic C# object model that Stage translates Screenplay's parsed language constructs into, and that Studio's design-time tooling reads and writes. Scene.Engine walks that graph, resolves bindings (data, action, form, navigation contribution) and drives whichever renderer is plugged in — it does not know React exists. Scene.React is one renderer implementing the abstract vocabulary against real React/DOM; sibling positions are reserved for future Scene.Native / Scene.Desktop renderers. Vendor and internal component packages (PrimeReact, internal widget libraries) are adapters plugging into the renderer contract, not part of it.

The design-time editor built on top of this object model lives in Studio, not here — see StudioIssues#156.

Support

Cratis is an open community, and we are glad to help users, teams evaluating the stack, and contributors.

The Cratis ecosystem

This project is part of Cratis — tools for building event-sourced and CQRS applications.

• Chronicle — event-sourcing database and runtime. Orleans-based kernel, pluggable storage (MongoDB default; PostgreSQL, SQL Server, SQLite, in-memory), language-agnostic gRPC contracts. Docs
• Chronicle clients — first-class .NET SDK, plus TypeScript, Kotlin/Java, and Elixir; Python coming soon. AI agents connect through the Chronicle MCP server.
• Arc — opinionated CQRS framework for ASP.NET Core with commands, queries, validation, authorization, and TypeScript proxy generation. Works without event sourcing. Docs
• Components — React components aligned with Arc patterns. Docs
• CLI + Workbench — inspect and diagnose Chronicle from the terminal or the browser. Docs
• Model-first layer — Studio, Screenplay, Stage, Scene (this repository), Prologue
• Supporting — Fundamentals, Specifications, Synopsis, Lens, Narrator, and free AI tooling; Ensemble coming soon
• Samples — runnable event sourcing and CQRS samples for the whole stack

Scene is MIT licensed and free to use.

Part of the Cratis platform · MIT