arch

Arch is an intelligent prompt gateway. Engineered with (fast) LLMs for the secure handling, robust observability, and seamless integration of prompts with APIs - all outside business logic. Built by the core contributors of Envoy proxy, on Envoy.

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Arch is an intelligent Layer 7 gateway designed to protect, observe, and personalize LLM applications with APIs. It handles tasks like detecting and rejecting jailbreak attempts, calling backend APIs, disaster recovery, and observability. Built on Envoy Proxy, it offers features like function calling, prompt guardrails, traffic management, and standards-based observability. Arch aims to improve the speed, security, and personalization of generative AI applications.

README:

Build fast, robust, and personalized AI agents.

Arch is an intelligent Layer 7 gateway designed to protect, observe, and personalize LLM applications (agents, assistants, co-pilots) with your APIs.

Engineered with purpose-built LLMs, Arch handles the critical but undifferentiated tasks related to the handling and processing of prompts, including detecting and rejecting jailbreak attempts, intelligently calling "backend" APIs to fulfill the user's request represented in a prompt, routing to and offering disaster recovery between upstream LLMs, and managing the observability of prompts and LLM interactions in a centralized way.

Arch is built on (and by the core contributors of) Envoy Proxy with the belief that:

Prompts are nuanced and opaque user requests, which require the same capabilities as traditional HTTP requests including secure handling, intelligent routing, robust observability, and integration with backend (API) systems for personalization – all outside business logic.*

Core Features:

Built on Envoy: Arch runs alongside application servers, and builds on top of Envoy's proven HTTP management and scalability features to handle ingress and egress traffic related to prompts and LLMs.
Function Calling for fast Agentic and RAG apps. Engineered with purpose-built LLMs to handle fast, cost-effective, and accurate prompt-based tasks like function/API calling, and parameter extraction from prompts.
Prompt Guard: Arch centralizes prompt guardrails to prevent jailbreak attempts and ensure safe user interactions without writing a single line of code.
Traffic Management: Arch manages LLM calls, offering smart retries, automatic cutover, and resilient upstream connections for continuous availability.
Standards-based Observability: Arch uses the W3C Trace Context standard to enable complete request tracing across applications, ensuring compatibility with observability tools, and provides metrics to monitor latency, token usage, and error rates, helping optimize AI application performance.

Jump to our docs to learn how you can use Arch to improve the speed, security and personalization of your GenAI apps.

Contact

To get in touch with us, please join our discord server. We will be monitoring that actively and offering support there.

Demos

Function Calling - Walk through of critical function calling capabilities
Insurance Agent - Build a full insurance agent with arch
Network Agent - Build a networking co-pilot/agent agent with arch

Quickstart

Follow this guide to learn how to quickly set up Arch and integrate it into your generative AI applications.

Prerequisites

Before you begin, ensure you have the following:

Docker & Python installed on your system
API Keys for LLM providers (if using external LLMs)

Step 1: Install Arch

Arch's CLI allows you to manage and interact with the Arch gateway efficiently. To install the CLI, simply run the following command: Tip: We recommend that developers create a new Python virtual environment to isolate dependencies before installing Arch. This ensures that archgw and its dependencies do not interfere with other packages on your system.

$ python -m venv venv
$ source venv/bin/activate   # On Windows, use: venv\Scripts\activate
$ pip install archgw

Step 2: Configure Arch with your application

Arch operates based on a configuration file where you can define LLM providers, prompt targets, guardrails, etc. Below is an example configuration to get you started:

version: v0.1

listen:
  address: 0.0.0.0 # or 127.0.0.1
  port: 10000
  # Defines how Arch should parse the content from application/json or text/pain Content-type in the http request
  message_format: huggingface

# Centralized way to manage LLMs, manage keys, retry logic, failover and limits in a central way
llm_providers:
  - name: OpenAI
    provider: openai
    access_key: OPENAI_API_KEY
    model: gpt-4o
    default: true
    stream: true

# default system prompt used by all prompt targets
system_prompt: You are a network assistant that just offers facts; not advice on manufacturers or purchasing decisions.

prompt_targets:
  - name: reboot_devices
    description: Reboot specific devices or device groups

    path: /agent/device_reboot
    parameters:
      - name: device_ids
        type: list
        description: A list of device identifiers (IDs) to reboot.
        required: false
      - name: device_group
        type: str
        description: The name of the device group to reboot
        required: false

# Arch creates a round-robin load balancing between different endpoints, managed via the cluster subsystem.
endpoints:
  app_server:
    # value could be ip address or a hostname with port
    # this could also be a list of endpoints for load balancing
    # for example endpoint: [ ip1:port, ip2:port ]
    endpoint: 127.0.0.1:80
    # max time to wait for a connection to be established
    connect_timeout: 0.005s

Step 3: Using OpenAI Client with Arch as an Egress Gateway

Make outbound calls via Arch

import openai

# Set the OpenAI API base URL to the Arch gateway endpoint
openai.api_base = "http://127.0.0.1:51001/v1"

# No need to set openai.api_key since it's configured in Arch's gateway

# Use the OpenAI client as usual
response = openai.Completion.create(
   model="text-davinci-003",
   prompt="What is the capital of France?"
)

print("OpenAI Response:", response.choices[0].text.strip())

Observability

Arch is designed to support best-in class observability by supporting open standards. Please read our docs on observability for more details on tracing, metrics, and logs

Contribution

We would love feedback on our Roadmap and we welcome contributions to Arch! Whether you're fixing bugs, adding new features, improving documentation, or creating tutorials, your help is much appreciated. Please vist our Contribution Guide for more details

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