Theater Actor Registry MCP Server

A Model Context Protocol (MCP) server that enables easy management and creation of Theater actors.

Overview

The Theater Actor Registry MCP Server provides tools for creating, managing, and building WebAssembly actors in the Theater system through the Model Context Protocol. It offers a set of tools accessible via the MCP server that enable easy actor creation, management, and building while maintaining a consistent structure and workflow.

Features

• Create new actors: Generate new actor projects with the required file structure and configurations
• List actors: View all available actors with filtering options
• Build actors: Build actors using Nix flakes or Cargo
• Get actor info: Retrieve detailed information about specific actors
• Get actor paths: Find the path to specific actor files

Installation

1. Clone the repository:

git clone https://github.com/your-username/actor-registry-mcp.git
cd actor-registry-mcp

2. Build the project:

cargo build --release

Running the MCP Server

Set the environment variable THEATER_ACTORS_PATH to point to your actors directory:

export THEATER_ACTORS_PATH=/path/to/your/actors
cargo run --release

If you do not set the environment variable, the server will use the default path /Users/colinrozzi/work/actor-registry.

Available Tools

create-new-actor

Creates a new actor with the required file structure and configurations.

Parameters:

• name: Name of the actor (required)
• template: Template to use (optional, defaults to basic)
• interfaces: List of interfaces to implement (optional)
• supervisor: Flag to add supervision capabilities (optional)

Example:

{
  "name": "my-new-actor",
  "template": "http",
  "interfaces": ["ntwk:theater/http-handlers"],
  "supervisor": false
}

list-actors

Lists all actors in the registry with their basic information.

Parameters:

• filter: Filter by interface, status, or pattern (optional)
• format: Output format (optional: text, json)
• detailed: Include additional metadata (optional)

Example:

{
  "filter": "interface:http-handlers",
  "format": "json",
  "detailed": true
}

build-actor

Builds an actor using nix flakes and validates the output.

Parameters:

• name: Name of the actor (required)
• release: Build in release mode (optional)
• check: Only check if build would succeed (optional)
• force: Force rebuild (optional)

Example:

{
  "name": "my-actor",
  "release": true,
  "check": false,
  "force": false
}

get-actor-info

Provides detailed information about a specific actor.

Parameters:

• name: Name of the actor (required)
• format: Output format (optional: text, json)

Example:

{
  "name": "my-actor",
  "format": "json"
}

get-actor-path

Retrieves the path to an actor or specific actor files.

Parameters:

• name: Name of the actor (required)
• file: Specific file to locate (optional: manifest.toml, component.wasm, etc.)
• absolute: Return absolute path (optional, defaults to relative)

Example:

{
  "name": "my-actor",
  "file": "manifest.toml",
  "absolute": true
}

Templates

The Actor Registry supports several templates for new actors:

• basic: A simple actor with message handling capabilities
• http: An actor with HTTP server functionality
• supervisor: An actor with supervisor capabilities for managing child actors

Integrating with MCP Clients

The Actor Registry MCP Server works with any MCP client that implements the Model Context Protocol. You can use it with the mcp-client crate from the rust-mcp project:

use mcp_client::{ClientBuilder, transport::StdioTransport};
use serde_json::json;

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    // Create a client that connects to the Theater Actor Registry MCP Server
    let (transport, receiver) = StdioTransport::new("path/to/actor-registry-mcp", vec![]);

    let client = ClientBuilder::new("my-client", "0.1.0")
        .with_transport(transport)
        .build()?;

    // Call the create-new-actor tool
    let result = client.call_tool("create-new-actor", &json!({
        "name": "my-new-actor",
        "template": "http"
    })).await?;

    println!("Actor created: {:?}", result);

    Ok(())
}

License

This project is licensed under the MIT License.