fuse-io 0.1.95

Fuse - Workflow automation. A powerful local-first automation platform with visual builder, AI integration, and extensive node library.

🚀 Fuse Backend: High-Performance Automation Engine

The Fuse Backend is the high-concurrency, asynchronous heartbeat of the Fuse platform. It is a sophisticated REST and WebSocket API designed using a modular, "package-first" philosophy to enable secure, scalable, and intelligent workflow orchestration.

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🛠️ Core Technology Stack

• Framework: FastAPI (Python 3.10+)
• ORM & Database: SQLModel (SQLAlchemy + Pydantic)
• Task Orchestration: Celery with Redis
• Security: JWT-based Authentication, Argon2 Hashing, and AES-256 Credential Encryption
• Communication: WebSockets for real-time log streaming and execution feedback
• Versioning: Distributed as an installable package via PyPI

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🏗️ Architectural Pillars

1. The Workflow Engine

The engine parses directed acyclic graphs (DAGs) defined in JSON and manages their execution lifecycle.

• Atomic Execution: Each node is an isolated execution context.
• State Propagation: Seamless data flow between nodes with support for complex mapping and variables.
• Error Handling: Built-in circuit breakers, retry logic, and fallback paths.

2. Modular Node System (node_packages/)

Every capability in Fuse is a standalone package. This ensures that the core engine remains lean while the node library can grow infinitely.

• Isolated Runtimes: Nodes can specify their own requirements and logic.
• GUI Editor: Users can create brand-new nodes via the dashboard, which are automatically scaffolded into the node_packages/ directory.

3. Dynamic Plugin System (plugin_packages/)

Plugins allow for heavy-duty extension of the platform.

• Manifest-Driven: Automatic discovery and registration based on manifest.json.
• Integrated Auth: Plugins can register their own OAuth configurations and API routes.

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📦 Professional Installation

Production (via PyPI)

We recommend using uv for near-instant installation and isolated environment management.

uv pip install fuse-io
fuse init
fuse start

Development Environment

# Clone and enter the backend directory
cd fuse_backend

# Create and synchronize environment
uv venv && source .venv/bin/activate
uv pip install -e ".[dev]"

# Synchronize database
fuse start --skip-browser

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⚙️ Advanced Configuration

Configuration is managed via environment variables (loading from .env by default).

Variable	Default	Description
DATABASE_URL	sqlite:///./fuse.db	Connection string (PostgreSQL recommended for production).
REDIS_URL	None	Required for Celery task queuing and heavy caching.
SECRET_KEY	dev-secret	Cryptographic key for JWTs and encryption. Change this.
FIRST_USER_EMAIL	[e-mail]	Default administrative account email.
SERVER_HOST	http://localhost:5678	Public-facing URL for OAuth callback resolution.

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🎮 Command Line Interface (CLI)

The fuse command is a powerful utility for managing your instance.

• fuse init: Scaffolds the .env configuration and initializes the database.
• fuse start: Launches the FastAPI server, runs pending migrations, and starts the UI.
• fuse version: Displays detailed version info for the engine and system environment.
• fuse --help: Comprehensive list of all available commands and flags.

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🤝 Technical Contribution

Fuse Backend follows strict Ruff formatting and MyPy type-checking standards.

1. Format Check: ruff check .
2. Type Check: mypy .
3. Run Tests: pytest

Branching Strategy

• main: Stable production releases.
• develop: Integration branch for upcoming features.
• feature/*: Specific feature developments.

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Built with Precision by Bibek Timilsina Scalable. Secure. Unified. 🌊