# iii — Real-Time Service Composition and Observation Framework

> iii lets you compose, extend, and observe every service in real-time, providing a Rust-based framework with primitives for JavaScript, Python, and TypeScript developers building modular AI-powered backends.

## Install

Save as a script file and run:

# iii — Real-Time Service Composition and Observation Framework

## Quick Use
```bash
npm install @iii-hq/core
# or
pip install iii-sdk
```

## Introduction
iii is a framework for composing, extending, and observing services in real-time. Built in Rust with SDKs for JavaScript, Python, and TypeScript, it enables developers to wire together microservices, APIs, and AI components into observable pipelines.

## What iii Does
- Composes services into pipelines with real-time data flow visualization
- Provides a unified SDK for JavaScript, Python, and TypeScript
- Offers real-time observation of every request and response in the pipeline
- Supports hot-reloading of service configurations without downtime
- Enables AI agent integration as first-class pipeline components

## Architecture Overview
The core runtime is written in Rust for performance and safety. It exposes a service graph where each node is a composable unit (API call, AI model, data transform). SDKs for JS, Python, and TS communicate with the Rust runtime via a lightweight RPC layer. An embedded dashboard provides real-time tracing of requests flowing through the graph.

## Self-Hosting & Configuration
- Install the SDK for your language via npm or pip
- Define service compositions in YAML or programmatically via the SDK
- Deploy the Rust runtime as a standalone binary or Docker container
- Configure observability outputs (console, file, or external tracing)
- Set up authentication and rate limiting for exposed endpoints

## Key Features
- Rust core for low-latency service composition
- Multi-language SDKs with consistent APIs
- Built-in real-time tracing and observation dashboard
- Hot-reload for service graph changes
- AI model nodes as first-class pipeline components

## Comparison with Similar Tools
- **Temporal** — workflow orchestration; iii is real-time service composition
- **Prefect** — Python-centric data pipelines; iii is polyglot and service-focused
- **Dapr** — sidecar-based runtime; iii is an embedded composition framework
- **Inngest** — event-driven functions; iii is continuous service graph execution

## FAQ
**Q: Do I need Rust knowledge to use iii?**
A: No. The JavaScript, Python, and TypeScript SDKs handle all interaction with the Rust core.

**Q: Can iii replace my API gateway?**
A: iii is a composition framework, not a gateway. It works alongside gateways to orchestrate backend services.

**Q: How does real-time observation work?**
A: Every service call in the graph emits structured events that the built-in dashboard or external collectors can consume.

**Q: Is iii suitable for production workloads?**
A: Yes. The Rust core is designed for low-latency production use with configurable resource limits.

## Sources
- https://github.com/iii-hq/iii
- https://github.com/iii-hq/iii#readme

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Source: https://tokrepo.com/en/workflows/asset-43359bb0
Author: Script Depot