Changelog

Latest updates, new features, and bug fixes for H3Channels.

v0.1.0

Initial Release

1 Jan 2026

Features

HTTP/3 and WebTransport support for low-latency realtime messaging
Automatic WebSocket fallback when WebTransport is unavailable
Dual delivery modes: reliable streams and unreliable datagrams
Token-based authentication with JWT support
Per-connection rate limiting with token bucket algorithm
Redis pub/sub adapter for horizontal scaling
In-memory adapter for single-instance deployments
Prometheus metrics at /metrics endpoint
Graceful shutdown with configurable timeout
TypeScript SDK for browser and Node.js
Auto-reconnect with exponential backoff
Client-side freshness tracking for datagrams

Server

Go 1.22+ server with quic-go and webtransport-go
Protocol Buffers for message serialization
Length-prefixed framing for reliable streams
Channel IDs using xxhash32 for stable hashing
Backpressure handling with bounded queues
Health endpoints: /healthz and /readyz

Client SDK

Strong TypeScript types throughout
Automatic transport selection and fallback
Connection state events
JSON payload parsing when content-type is application/json
ESM and CJS builds with tsup

Infrastructure

Docker Compose with Redis, Prometheus, and Grafana
GitHub Actions CI pipeline
Next.js demo application
Comprehensive documentation

Future

Planned

Roadmap

Message persistence and replay
Channel history and cursor-based pagination
mTLS support for enhanced security
RBAC and custom channel policies
Multi-tenant mode with organization keys
Message compression (gzip, brotli)
Presence tracking (who's subscribed)
Broadcast channels (one-to-many without Redis)
GraphQL subscription bridge
Managed cloud offering

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