cubbi/SPECIFICATIONS.md

MC - Monadical AI Container Tool

Overview

MC (Monadical Container) is a command-line tool for managing ephemeral containers that run AI tools and development environments. It works with both local Docker and a dedicated remote web service that manages containers in a Docker-in-Docker (DinD) environment.

Technology Stack

MC Service

• Web Framework: FastAPI for high-performance, async API endpoints
• Package Management: uv (Astral) for dependency management
• Database: SQLite for development, PostgreSQL for production
• Container Management: Docker SDK for Python
• Authentication: OAuth 2.0 integration with Authentik

MC CLI

• Language: Python
• Package Management: uv for dependency management
• Distribution: Standalone binary via PyInstaller or similar
• Configuration: YAML for configuration files

System Architecture

Components

1. CLI Tool (mc): The command-line interface users interact with
2. MC Service: A web service that handles remote container execution
3. Container Drivers: Predefined container templates for various AI tools

Architecture Diagram

┌─────────────┐           ┌─────────────────────────┐
│             │           │                         │
│  MC CLI     │◄─────────►│  Local Docker Daemon    │
│  (mc)       │           │                         │
│             │           └─────────────────────────┘
└──────┬──────┘
       │
       │ REST API
       │
┌──────▼──────┐           ┌─────────────────────────┐
│             │           │                         │
│ MC Service  │◄─────────►│  Docker-in-Docker       │
│ (Web API)   │           │                         │
│             │           └─────────────────────────┘
└─────────────┘
       │
       ├──────────────┬───────────────┐
       │              │               │
┌──────▼──────┐ ┌─────▼─────┐  ┌──────▼──────┐
│             │ │           │  │             │
│  Fluentd    │ │ Langfuse  │  │ Other       │
│  Logging    │ │ Logging   │  │ Services    │
│             │ │           │  │             │
└─────────────┘ └───────────┘  └─────────────┘

Core Concepts

• Session: An active container instance with a specific driver
• Driver: A predefined container template with specific AI tools installed
• Remote: A configured MC service instance

CLI Tool Commands

Basic Commands

# Create a new session locally (shorthand)
mc

# List active sessions on local system
mc session list

# Create a new session locally
mc session create [OPTIONS]

# Create a session with a specific driver
mc session create --driver goose

# Create a session with a specific project repository
mc session create --driver goose --project github.com/hello/private

# Create a session with a project (shorthand)
mc git@github.com:hello/private

# Close a specific session
mc session close <id>

# Connect to an existing session
mc session connect <id>

# Stop the current session (from inside the container)
mc stop

Remote Management

# Add a remote MC service
mc remote add <name> <url>

# List configured remote services
mc remote list

# Remove a remote service
mc remote remove <name>

# Authenticate with a remote service
mc -r <remote_name> auth

# Create a session on a remote service
mc -r <remote_name> [session create]

# List sessions on a remote service
mc -r <remote_name> session list

Environment Variables

# Set environment variables for a session
mc session create -e VAR1=value1 -e VAR2=value2

# Set environment variables for a remote session
mc -r <remote_name> session create -e VAR1=value1

Logging

# Stream logs from a session
mc session logs <id>

# Stream logs with follow option
mc session logs <id> -f

MC Service Specification

Overview

The MC Service is a web service that manages ephemeral containers in a Docker-in-Docker environment. It provides a REST API for container lifecycle management, authentication, and real-time log streaming.

API Endpoints

Authentication

POST /auth/login        - Initiate Authentik authentication flow
POST /auth/callback     - Handle Authentik OAuth callback
POST /auth/refresh      - Refresh an existing token
POST /auth/logout       - Invalidate current token

Authentik Integration

The MC Service integrates with Authentik at https://authentik.monadical.io using OAuth 2.0:

1. Application Registration:

   • MC Service is registered as an OAuth application in Authentik
   • Configured with redirect URI to /auth/callback
   • Assigned appropriate scopes for user identification

2. Authentication Flow:

   • User initiates authentication via CLI
   • MC CLI opens browser to Authentik authorization URL
   • User logs in through Authentik's interface
   • Authentik redirects to callback URL with authorization code
   • MC Service exchanges code for access and refresh tokens
   • CLI receives and securely stores tokens

3. Token Management:

   • Access tokens used for API authorization
   • Refresh tokens used to obtain new access tokens
   • Tokens are encrypted at rest in CLI configuration

Sessions

GET /sessions - List all sessions
POST /sessions - Create a new session
GET /sessions/{id} - Get session details
DELETE /sessions/{id} - Terminate a session
POST /sessions/{id}/connect - Establish connection to session
GET /sessions/{id}/logs - Stream session logs

Drivers

GET /drivers - List available drivers
GET /drivers/{name} - Get driver details

Projects

GET /projects - List all projects
POST /projects - Add a new project
GET /projects/{id} - Get project details
PUT /projects/{id} - Update project details
DELETE /projects/{id} - Remove a project

Service Configuration

# mc-service.yaml
server:
  port: 3000
  host: 0.0.0.0

docker:
  socket: /var/run/docker.sock
  network: mc-network

auth:
  provider: authentik
  url: https://authentik.monadical.io
  clientId: mc-service

logging:
  providers:
    - type: fluentd
      url: http://fluentd.example.com:24224
    - type: langfuse
      url: https://api.langfuse.com
      apiKey: ${LANGFUSE_API_KEY}

drivers:
  - name: goose
    image: monadical/mc-goose:latest
    env:
      MCP_HOST: http://mcp:8000
  - name: aider
    image: monadical/mc-aider:latest
  - name: claude-code
    image: monadical/mc-claude-code:latest

projects:
  storage:
    type: encrypted
    key: ${PROJECT_ENCRYPTION_KEY}
  default_ssh_scan:
    - github.com
    - gitlab.com
    - bitbucket.org

Docker-in-Docker Implementation

The MC Service runs in a container with access to the host's Docker socket, allowing it to create and manage sibling containers. This approach provides:

1. Isolation between containers
2. Simple lifecycle management
3. Resource constraints for security

Connection Handling

For remote connections to containers, the service provides two methods:

1. WebSocket Terminal: Browser-based terminal access
2. SSH Server: Each container runs an SSH server for CLI access

Logging Implementation

The MC Service implements log collection and forwarding:

1. Container logs are captured using Docker's logging drivers
2. Logs are forwarded to configured providers (Fluentd, Langfuse)
3. Real-time log streaming is available via WebSockets

Project Management

Adding Projects

Users can add projects with associated credentials:

# Add a project with SSH key
mc project add github.com/hello/private --ssh-key ~/.ssh/id_ed25519

# Add a project with token authentication
mc project add github.com/hello/private --token ghp_123456789

# List all projects
mc project list

# Remove a project
mc project remove github.com/hello/private

Project Configuration

Projects are stored in the MC service and referenced by their repository URL. The configuration includes:

# Project configuration
id: github.com/hello/private
url: git@github.com:hello/private.git
type: git
auth:
  type: ssh
  key: |
    -----BEGIN OPENSSH PRIVATE KEY-----
    ...encrypted key data...
    -----END OPENSSH PRIVATE KEY-----
  public_key: ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAI...

Driver Implementation

Driver Structure

Each driver is a Docker image with a standardized structure:

/
├── entrypoint.sh      # Container initialization
├── mc-init.sh         # Standardized initialization script
├── mc-driver.yaml     # Driver metadata and configuration
├── tool/              # AI tool installation
└── ssh/               # SSH server configuration

Standardized Initialization Script

All drivers include a standardized mc-init.sh script that handles common initialization tasks:

#!/bin/bash

# Project initialization
if [ -n "$MC_PROJECT_URL" ]; then
    echo "Initializing project: $MC_PROJECT_URL"

    # Set up SSH key if provided
    if [ -n "$MC_GIT_SSH_KEY" ]; then
        mkdir -p ~/.ssh
        echo "$MC_GIT_SSH_KEY" > ~/.ssh/id_ed25519
        chmod 600 ~/.ssh/id_ed25519
        ssh-keyscan github.com >> ~/.ssh/known_hosts 2>/dev/null
    fi

    # Set up token if provided
    if [ -n "$MC_GIT_TOKEN" ]; then
        git config --global credential.helper store
        echo "https://$MC_GIT_TOKEN:x-oauth-basic@github.com" > ~/.git-credentials
    fi

    # Clone repository
    git clone $MC_PROJECT_URL /app
    cd /app

    # Run project-specific initialization if present
    if [ -f "/app/.mc/init.sh" ]; then
        bash /app/.mc/init.sh
    fi
fi

# Driver-specific initialization continues...

Driver Configuration (mc-driver.yaml)

name: goose
description: Goose with MCP servers
version: 1.0.0
maintainer: team@monadical.com

init:
  pre_command: /mc-init.sh
  command: /entrypoint.sh

environment:
  - name: MCP_HOST
    description: MCP server host
    required: true
    default: http://localhost:8000

  - name: GOOSE_ID
    description: Goose instance ID
    required: false

  # Project environment variables
  - name: MC_PROJECT_URL
    description: Project repository URL
    required: false

  - name: MC_PROJECT_TYPE
    description: Project repository type (git, svn, etc.)
    required: false
    default: git

  - name: MC_GIT_SSH_KEY
    description: SSH key for Git authentication
    required: false
    sensitive: true

  - name: MC_GIT_TOKEN
    description: Token for Git authentication
    required: false
    sensitive: true

ports:
  - 8000   # Main application
  - 22     # SSH server

volumes:
  - mountPath: /app
    description: Application directory

Example Built-in Drivers

1. goose: Goose with MCP servers
2. aider: Aider coding assistant
3. claude-code: Claude Code environment
4. custom: Custom Dockerfile support

Security Considerations

1. Container Isolation: Each session runs in an isolated container
2. Authentication: Integration with Authentik for secure authentication
3. Resource Limits: Configurable CPU, memory, and storage limits
4. Network Isolation: Internal Docker network for container-to-container communication
5. Encrypted Connections: TLS for API connections and SSH for terminal access

Deployment

MC Service Deployment

# docker-compose.yml for MC Service
version: '3.8'

services:
  mc-service:
    image: monadical/mc-service:latest
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ./config:/app/config
    ports:
      - "3000:3000"
    environment:
      - AUTH_URL=https://authentik.monadical.io
      - LANGFUSE_API_KEY=your_api_key
    networks:
      - mc-network

networks:
  mc-network:
    driver: bridge

Project Repository Integration Workflow

Adding a Project Repository

1. User adds project repository with authentication:

   mc project add github.com/hello/private --ssh-key ~/.ssh/id_ed25519
   

2. MC CLI reads the SSH key, encrypts it, and sends to MC Service

3. MC Service stores the project configuration securely

Using a Project in a Session

1. User creates a session with a project:

   mc -r monadical git@github.com:hello/private
   

2. MC Service:

   • Identifies the project from the URL
   • Retrieves project authentication details
   • Sets up environment variables:

     MC_PROJECT_URL=git@github.com:hello/private
     MC_PROJECT_TYPE=git
     MC_GIT_SSH_KEY=<contents of the SSH key>
     

   • Creates container with these environment variables

3. Container initialization:

   • The standardized mc-init.sh script detects the project environment variables
   • Sets up SSH key or token authentication
   • Clones the repository to /app
   • Runs any project-specific initialization scripts

4. User can immediately begin working with the repository

Implementation Roadmap

1. Phase 1: Local CLI tool with Docker integration
2. Phase 2: MC Service REST API with basic container management
3. Phase 3: Authentication and secure connections
4. Phase 4: Project management functionality
5. Phase 5: Driver implementation (Goose, Aider, Claude Code)
6. Phase 6: Logging integration with Fluentd and Langfuse
7. Phase 7: CLI remote connectivity improvements
8. Phase 8: Additional drivers and extensibility features