🌋 What is Magma?

Magma is a framework that lets you create AI agents without the headache. No complex chains, no confusing abstractions - just write the logic you want your agent to have.

Want to try it out? Chat with Dialog, our user research agent built with Magma!

⚡️ Quick Start

1. Install Magma:

npm i @pompeii-labs/magma

2. Create your first agent:

import { MagmaAgent } from "@pompeii-labs/magma";

// Magma Agents are class based, so you can extend them with your own methods
class MyAgent extends MagmaAgent {

    // Want to give it some personality? Add system prompts:
    getSystemPrompts() {
        return [{
            role: "system",
            content: "You are a friendly assistant who loves dad jokes"
        }];
    }
}

// That's it! You've got a working agent
const myAgent = new MyAgent();

// Run it:
const reply = await myAgent.main();
console.log(reply.content);

🔥 Key Features

• Simple: Build agents in minutes with minimal code
• Flexible: Use any AI provider (OpenAI, Anthropic, Groq)
• Hosted: Deploy your agents in seconds with the MagmaDeploy platform
• Powerful: Add tools and middleware when you need them
• Observable: See exactly what your agent is doing

🛠 Examples

Add Tools

Tools give your agent the ability to perform actions. Any method decorated with @tool and @toolparam will be available for the agent to use.

Important Notes:

• Every tool method must return a string
• Every tool has call as a required parameter, which is the MagmaToolCall object
• Tools are executed in sequence

import { MagmaAgent } from "@pompeii-labs/magma";
import { tool, toolparam } from "@pompeii-labs/magma/decorators";

/** Decorate any agent class method with @toolparam or @tool. 
 * @tool is used to define the tool itself
 * @toolparam is used to define the parameters of the tool (key, type, description, required)
 */
class MyAgent extends MagmaAgent {
    @tool({ name: "search_database", description: "Search the database for records" })
    @toolparam({
        key: "query",
        type: "string",
        description: "Search query",
        required: true
    })
    @toolparam({
        key: "filters",
        type: "object",
        properties: [
            { key: "date", type: "string" },
            { key: "category", type: "string", enum: ["A", "B", "C"] }
        ]
    })
    async searchDatabase(call: MagmaToolCall) {
        const { query, filters } = call.fn_args;

        const results = await this.searchDatabase(query, filters);

        return "Here are the results of your search: " + JSON.stringify(results);
    }
}

Add Middleware

Middleware is a novel concept to Magma. It allows you to add custom logic to your agent before or after a tool is executed.

This is a great way to add custom logging, validation, data sanitization, etc.

Types:

• "preCompletion": Runs before the LLM call is made, takes in a MagmaUserMessage
• "onCompletion": Runs after the agent generates a text response, takes in a MagmaAssistantMessage
• "preToolExecution": Runs before a tool is executed, takes in a MagmaToolCall
• "onToolExecution": Runs after a tool is executed, takes in a MagmaToolResult

Important Notes:

• You can have unlimited middleware methods
• Middleware methods can manipulate the message they take in
• Middleware methods can throw errors to adjust the flow of the agent

Error Handling:

• If preCompletion middleware throws an error, the error message is supplied as if it were the assistant message. The user and assistant messages are also removed from the conversation history
• If onCompletion middleware throws an error, the error message is supplied to the LLM, and it tries to regenerate a response. The assistant message is not added to the conversation history
• If preToolExecution middleware throws an error, the error message is supplied as if it were the response from the tool
• If onToolExecution middleware throws an error, the error message is supplied as if it were the response from the tool

import { MagmaAgent } from "@pompeii-labs/magma";
import { middleware } from "@pompeii-labs/magma/decorators";

/**
 * Decorate any agent class method with @middleware to add custom logging, validation, etc.
 * Types: "preCompletion", "onCompletion", "preToolExecution", "onToolExecution"
 */
class MyAgent extends MagmaAgent {

    @middleware("onCompletion")
    async logBeforeCompletion(message) {
        if (message.content.includes("bad word")) {
            throw new Error("You just used a bad word, please try again.");
        }
    }
}

Schedule Jobs

Jobs allow you to schedule functions within your agent. Jobs conform to the standard UNIX cron syntax (https://crontab.guru/).

Important Notes:

• Jobs should be static methods, so they can run without instantiating the agent.
• Jobs do not take in any parameters, and they do not return anything.

import { MagmaAgent } from "@pompeii-labs/magma";
import { job } from "@pompeii-labs/magma/decorators";

class MyAgent extends MagmaAgent {
    // Run every day at midnight
    @job("0 0 * * *")
    static async dailyCleanup() {
        await this.cleanDatabase();
    }

    // Run every hour with timezone
    @job("0 * * * *", { timezone: "America/New_York" })
    static async hourlySync() {
        await this.syncData();
    }
}

Expose Hooks

Hooks allow you to expose your agent as an API. Any method decorated with @hook will be exposed as an endpoint.

Important Notes:

• Hooks are static methods, so they can run without instantiating the agent.
• Hooks are exposed at /hooks/{hook_name} in the Magma API
• The only parameter to hook functions is the request object, which is an instance of express.Request

import { MagmaAgent } from "@pompeii-labs/magma";
import { hook } from "@pompeii-labs/magma/decorators";
import { Request } from "express";

class MyAgent extends MagmaAgent {

    @hook('notification')
    static async handleNotification(req: Request) {
        await this.processNotification(req.body);
    }
}

Use Different Providers

You can use any supported provider by setting the providerConfig.

Important Notes:

• You can set the providerConfig in the constructor, or by calling setProviderConfig
• You do not need to adjust any of your tools, middleware, jobs, or hooks to use a different provider. Magma will handle the rest.

class Agent extends MagmaAgent {
    constructor() {
        // Use OpenAI (default)
        super({
            providerConfig: {
                provider: "openai",
                model: "gpt-4o"
            }
        });

        // Use Anthropic
        this.setProviderConfig({
            provider: "anthropic",
            model: "claude-3.5-sonnet-20240620"
        });

        // Use Groq
        this.setProviderConfig({
            provider: "groq",
            model: "llama-3.1-70b-versatile"
        });
    }
}

State Management

Every Tool, Middleware, Hook, and Job is passed the instance of the agent. This allows you to manipulate agent state and call agent functions in Utility classes

class MyAgent extends MagmaAgent {
    // Using a field to store data
    myQuery: string;
    counter: number;

    async setup() {
        this.myQuery = "Hello, World!";
        this.counter = 0;
    }

    @tool({ description: "Increment the counter" })
    async increment() {
        this.counter++;
        return `Counter is now ${this.counter}`;
    }

    @tool({ name: "api_call" })
    async apiCall() {
        const response = await fetch("https://myapi.com/data", {
            body: JSON.stringify({
                query: this.myQuery
            })
        });

        return JSON.stringify(response.json());
    }
}

Core Methods

import { MagmaAgent } from "@pompeii-labs/magma";

class MyAgent extends MagmaAgent {
    // Initialize your agent
    async setup() {
        // Load resources, connect to databases, etc.
        await this.loadDatabase();
        return "I'm ready to help!";
    }

    // Handle incoming messages
    async receive(message: any) {
        // Process user input before main() is called
        if (message.type === 'image') {
            await this.processImage(message.content);
        }
    }

    // Clean up resources
    async cleanup();

    // Manually trigger a specific tool
    async trigger({ name: "get_weather" });

    // Stop the current execution
    kill();
}

Event Handlers

Event handlers are optional methods that allow you to tack on custom logic to various events in the agent lifecycle.

import { MagmaAgent } from "@pompeii-labs/magma";

class MyAgent extends MagmaAgent {
    // Handle agent shutdown
    async onCleanup() {
        console.log("Agent shutting down...");
    }

    // Handle errors
    async onError(error: Error) {
        console.error("Something went wrong:", error);
        await this.notifyAdmin(error);
    }

    // Track token usage
    async onUsageUpdate(usage: MagmaUsage) {
        await this.saveUsageMetrics(usage);
    }

    // Process streaming responses
    async onStreamChunk(chunk: MagmaStreamChunk) {
        console.log("Received chunk:", chunk.content);
    }
}

📚 Want More?

• Join our Slack Community
• Star us on GitHub

📝 License

Magma is Apache 2.0 licensed.