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Marc Rejohn Castillano 5cb6561924 added ruflo

2026-04-09 19:01:53 +08:00

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QUIC Transport for Agentic Flow

High-performance QUIC/HTTP3 transport layer for faster and more reliable agent communication.

Features

🚀 2-3x Faster Connections - 0-RTT and 1-RTT handshakes vs TCP's 2-RTT
🔄 Stream Multiplexing - True independence without head-of-line blocking
📦 Connection Pooling - Efficient connection reuse
🔌 Auto Fallback - Graceful HTTP/2 fallback when needed
🏥 Health Monitoring - Built-in health checks and metrics
🔐 TLS 1.3 Built-in - Encryption integrated into protocol

Quick Start

# Enable QUIC transport
export AGENTIC_FLOW_ENABLE_QUIC=true

# Generate certificates (development)
mkdir -p certs
openssl req -x509 -newkey rsa:4096 -nodes \
  -keyout certs/key.pem \
  -out certs/cert.pem \
  -days 365 \
  -subj "/CN=localhost"

# Start proxy with QUIC
npm run proxy:quic

Configuration

Environment Variables

export AGENTIC_FLOW_ENABLE_QUIC=true
export QUIC_PORT=4433
export QUIC_HOST=0.0.0.0
export QUIC_CERT_PATH=./certs/cert.pem
export QUIC_KEY_PATH=./certs/key.pem
export QUIC_MAX_CONNECTIONS=100
export QUIC_MAX_STREAMS=100

Programmatic

import { createQuicProxy } from 'agentic-flow/proxy/quic-proxy';

const proxy = createQuicProxy({
  openrouterApiKey: process.env.OPENROUTER_API_KEY,
  transport: 'auto', // 'quic' | 'http2' | 'auto'
  enableQuic: true,
  quic: {
    port: 4433,
    maxConnections: 100,
    maxConcurrentStreams: 100
  },
  fallbackToHttp2: true
});

proxy.start(3000);

Usage Examples

Client

import { QuicClient } from 'agentic-flow/transport/quic';

const client = new QuicClient({
  serverHost: 'api.example.com',
  serverPort: 4433
});

await client.initialize();

const connection = await client.connect();
const stream = await client.createStream(connection.id);

await stream.send(new TextEncoder().encode('Hello'));
const response = await stream.receive();

await stream.close();
await client.shutdown();

Server

import { QuicServer } from 'agentic-flow/transport/quic';

const server = new QuicServer({
  host: '0.0.0.0',
  port: 4433,
  certPath: './certs/cert.pem',
  keyPath: './certs/key.pem'
});

await server.initialize();
await server.listen();

Connection Pool

import { QuicClient, QuicConnectionPool } from 'agentic-flow/transport/quic';

const client = new QuicClient();
await client.initialize();

const pool = new QuicConnectionPool(client, 20);
const conn = await pool.getConnection('api.example.com', 4433);

// Automatically reuses existing connections
const conn2 = await pool.getConnection('api.example.com', 4433);
console.log(conn.id === conn2.id); // true

Health Checks

# Check overall health (includes QUIC)
curl http://localhost:8080/health

# QUIC-specific health
curl http://localhost:8080/health/quic

Performance

Metric	HTTP/2	QUIC	Improvement
Connection Time	50-100ms	0-30ms	2-3x
First Byte	100-200ms	50-100ms	2x
Latency	200-400ms	100-250ms	1.5-2x

Testing

# Run QUIC integration tests
npm run test:quic

# Test with development proxy
npm run proxy:quic:dev

Troubleshooting

QUIC Not Available

Check availability:

import { checkQuicAvailability } from 'agentic-flow/config/quic';

const status = await checkQuicAvailability();
console.log(status);

Connection Timeouts

Verify UDP port 4433 is open:
```
sudo netstat -tulpn | grep 4433
```
Check firewall:
```
sudo ufw allow 4433/udp
```

Certificate Issues

For development:

export QUIC_VERIFY_PEER=false

For production, use proper certificates from Let's Encrypt.

Documentation

Architecture

┌─────────────────┐
│  QUIC Client    │
│  - Connection   │
│    Pool         │
│  - Stream Mux   │
└────────┬────────┘
         │
         │ UDP/QUIC
         │
┌────────▼────────┐
│  QUIC Server    │
│  - TLS 1.3      │
│  - HTTP/3       │
└─────────────────┘

Requirements

Node.js >= 18.0.0
UDP port 4433 accessible
TLS 1.3 certificates

Roadmap

WASM module integration
HTTP/3 QPACK compression
0-RTT resumption
Connection migration
BBR congestion control

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