Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub ยท Developer Tools
Websocket Hub Patterns
Horizontally-scalable WebSocket hub pattern with lazy Redis subscriptions, connection registry, and graceful shutdown. Use when building real-time WebSocket servers that scale across multiple instances. Triggers on WebSocket hub, WebSocket scaling, connection registry, Redis WebSocket, real-time gateway, horizontal scaling.
skill openclawclawhub Free
Horizontally-scalable WebSocket hub pattern with lazy Redis subscriptions, connection registry, and graceful shutdown. Use when building real-time WebSocket servers that scale across multiple instances. Triggers on WebSocket hub, WebSocket scaling, connection registry, Redis WebSocket, real-time gateway, horizontal scaling.
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Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- README.md, SKILL.md
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Then review README.md for any prerequisites, environment setup, or post-install checks. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Then review README.md for any prerequisites, environment setup, or post-install checks. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.0.0
Provenance
- Publisher
- wpank
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
WebSocket Hub Patterns
Production patterns for horizontally-scalable WebSocket connections with Redis-backed coordination.
OpenClaw / Moltbot / Clawbot
npx clawhub@latest install websocket-hub-patterns
When to Use
Real-time bidirectional communication Chat applications, collaborative editing Live dashboards with client interactions Need horizontal scaling across multiple gateway instances
Hub Structure
type Hub struct { // Local state connections map[*Connection]bool subscriptions map[string]map[*Connection]bool // channel -> connections // Channels register chan *Connection unregister chan *Connection broadcast chan *Event // Redis for scaling redisClient *redis.Client redisSubs map[string]*goredis.PubSub redisSubLock sync.Mutex // Optional: Distributed registry connRegistry *ConnectionRegistry instanceID string // Shutdown done chan struct{} wg sync.WaitGroup }
Hub Main Loop
func (h *Hub) Run() { for { select { case <-h.done: return case conn := <-h.register: h.connections[conn] = true if h.connRegistry != nil { h.connRegistry.RegisterConnection(ctx, conn.ID(), info) } case conn := <-h.unregister: if _, ok := h.connections[conn]; ok { if h.connRegistry != nil { h.connRegistry.UnregisterConnection(ctx, conn.ID()) } h.removeConnection(conn) } case event := <-h.broadcast: h.broadcastToChannel(event) } } }
Lazy Redis Subscriptions
Subscribe to Redis only when first local subscriber joins: func (h *Hub) subscribeToChannel(conn *Connection, channel string) error { // Add to local subscriptions if h.subscriptions[channel] == nil { h.subscriptions[channel] = make(map[*Connection]bool) } h.subscriptions[channel][conn] = true // Lazy: Only subscribe to Redis on first subscriber h.redisSubLock.Lock() defer h.redisSubLock.Unlock() if _, exists := h.redisSubs[channel]; !exists { pubsub := h.redisClient.Subscribe(context.Background(), channel) h.redisSubs[channel] = pubsub go h.forwardRedisMessages(channel, pubsub) } return nil } func (h *Hub) unsubscribeFromChannel(conn *Connection, channel string) { if subs, ok := h.subscriptions[channel]; ok { delete(subs, conn) // Cleanup when no local subscribers if len(subs) == 0 { delete(h.subscriptions, channel) h.closeRedisSubscription(channel) } } }
Redis Message Forwarding
func (h *Hub) forwardRedisMessages(channel string, pubsub *goredis.PubSub) { ch := pubsub.Channel() for { select { case <-h.done: return case msg, ok := <-ch: if !ok { return } h.broadcast <- &Event{ Channel: channel, Data: []byte(msg.Payload), } } } } func (h *Hub) broadcastToChannel(event *Event) { subs := h.subscriptions[event.Channel] for conn := range subs { select { case conn.send <- event.Data: // Sent default: // Buffer full - close slow client h.removeConnection(conn) } } }
Connection Write Pump
func (c *Connection) writePump() { ticker := time.NewTicker(54 * time.Second) // Ping interval defer func() { ticker.Stop() c.conn.Close() }() for { select { case message, ok := <-c.send: c.conn.SetWriteDeadline(time.Now().Add(10 * time.Second)) if !ok { c.conn.WriteMessage(websocket.CloseMessage, []byte{}) return } c.conn.WriteMessage(websocket.TextMessage, message) // Batch drain queue for i := 0; i < len(c.send); i++ { c.conn.WriteMessage(websocket.TextMessage, <-c.send) } case <-ticker.C: if err := c.conn.WriteMessage(websocket.PingMessage, nil); err != nil { return } } } }
Connection Registry for Horizontal Scaling
type ConnectionRegistry struct { client *redis.Client instanceID string } func (r *ConnectionRegistry) RegisterConnection(ctx context.Context, connID string, info ConnectionInfo) error { info.InstanceID = r.instanceID data, _ := json.Marshal(info) return r.client.Set(ctx, "ws:conn:"+connID, data, 2*time.Minute).Err() } func (r *ConnectionRegistry) HeartbeatInstance(ctx context.Context, connectionCount int) error { info := InstanceInfo{ InstanceID: r.instanceID, Connections: connectionCount, } data, _ := json.Marshal(info) return r.client.Set(ctx, "ws:instance:"+r.instanceID, data, 30*time.Second).Err() }
Graceful Shutdown
func (h *Hub) Shutdown() { close(h.done) // Close all Redis subscriptions h.redisSubLock.Lock() for channel, pubsub := range h.redisSubs { pubsub.Close() delete(h.redisSubs, channel) } h.redisSubLock.Unlock() // Close all connections for conn := range h.connections { conn.Close() } h.wg.Wait() }
Decision Tree
SituationApproachSingle instanceSkip ConnectionRegistryMulti-instanceEnable ConnectionRegistryNo subscribers to channelLazy unsubscribe from RedisSlow clientClose on buffer overflowNeed message historyUse Redis Streams + Pub/Sub
Related Skills
Meta-skill: ai/skills/meta/realtime-dashboard/ โ Complete realtime dashboard guide dual-stream-architecture โ Event publishing resilient-connections โ Connection resilience
NEVER Do
NEVER block on conn.send โ Use select with default to detect overflow NEVER skip graceful shutdown โ Clients need close frames NEVER share pubsub across channels โ Each channel needs own subscription NEVER forget instance heartbeat โ Dead instances leave orphaned connections NEVER send without ping/pong โ Load balancers close "idle" connections
Category context
Code helpers, APIs, CLIs, browser automation, testing, and developer operations.
Source: Tencent SkillHub
Largest current source with strong distribution and engagement signals.
Package contents
Included in package
2 Docs
- SKILL.md
- README.md