Picea.Rubens 0.1.9-ga323611391

This is a prerelease version of Picea.Rubens.

dotnet add package Picea.Rubens --version 0.1.9-ga323611391

NuGet\Install-Package Picea.Rubens -Version 0.1.9-ga323611391

This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.

<PackageReference Include="Picea.Rubens" Version="0.1.9-ga323611391" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="Picea.Rubens" Version="0.1.9-ga323611391" />
                    

                            Directory.Packages.props

<PackageReference Include="Picea.Rubens" />
                    

                            Project file

For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package.

paket add Picea.Rubens --version 0.1.9-ga323611391

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: Picea.Rubens, 0.1.9-ga323611391"

#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.

#:package Picea.Rubens@0.1.9-ga323611391

#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package.

#addin nuget:?package=Picea.Rubens&version=0.1.9-ga323611391&prerelease
                    

                            Install as a Cake Addin

#tool nuget:?package=Picea.Rubens&version=0.1.9-ga323611391&prerelease
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Picea.Rubens

Actor model (Hewitt 1973) built on the Picea kernel.

What is Rubens?

Rubens implements Hewitt's three axioms of the Actor Model on top of the Picea automaton kernel:

Send messages — Address<TCommand>.Tell() (fire-and-forget, asynchronous)
Create actors — Actor.Spawn() returns an unforgeable Address<TCommand>
Designate behavior — Decider.Decide + Automaton.Transition (the new state IS the new behavior)

All actors are Deciders: they validate commands against state, produce events, and evolve via transitions. This is a domain design choice — actors model business logic, not raw message pipes.

Key Types

Type	Description
`Actor`	Factory for spawning actors (Hewitt's axiom #2)
`Address<TCommand>`	Unforgeable capability to send commands (axiom #1)
`Envelope<TCommand, TReply>`	Command + reply address (Hewitt's request-reply)
`ReplyActor<T>`	One-shot Decider for request-reply (axiom #3)
`ReplyChannel`	Convenience factory to spawn reply actors

Installation

dotnet add package Picea.Rubens

Quick Start

using Picea;
using Picea.Rubens;

// Spawn an actor — returns an unforgeable address
var address = await Actor.Spawn<MyDecider, MyState, MyCommand,
    MyEvent, MyEffect, MyError, Unit>(
    default, observer, interpreter, cancellationToken: ct);

// Send a command (fire-and-forget)
await address.Tell(new MyCommand.DoSomething());

// Request-reply via envelope pattern
var replyAddress = await Actor.SpawnWithReply<MyDecider, MyState, MyCommand,
    MyEvent, MyEffect, MyError, Unit>(
    default, observer, interpreter, cancellationToken: ct);

var (reply, task) = await ReplyChannel.Open<Result<MyState, MyError>>(ct);
await replyAddress.Tell(new Envelope<MyCommand, Result<MyState, MyError>>(
    new MyCommand.DoSomething(), reply));
var result = await task;

Design

The key insight is that Hewitt's "designate behavior for next message" is exactly what a Mealy machine does: Transition(state, event) → (state', effect). The new state IS the new behavior. This is why Hewitt's actors and finite-state machines are the same mathematical object — both are coalgebras over the functor F(X) = (Output × X)^Input.

References

Hewitt, Bishop, Steiger (1973). "A Universal Modular Actor Formalism for Artificial Intelligence." IJCAI'73.
Hewitt (2010). "Actor Model of Computation: Scalable Robust Information Systems." arXiv:1008.1459.
Chassaing, Jérémie (2021). "The Decider Pattern."

License

Apache-2.0

Product	Compatible and additional computed target framework versions.
.NET	net10.0 is compatible. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

net10.0
- Picea (>= 1.0.22-rc-0001)

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version	Downloads	Last Updated
0.1.9-ga323611391	48	3/12/2026