Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add hoangatg/ai-agent-toolkit --skill websocket-realtimegit clone --depth 1 https://github.com/hoangatg/ai-agent-toolkitWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/hoangatg/ai-agent-toolkit/websocket-realtime)<a href="https://agentmods.dev/skills/hoangatg/ai-agent-toolkit/websocket-realtime"><img src="https://agentmods.dev/badge/skills/hoangatg/ai-agent-toolkit/websocket-realtime/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/hoangatg/ai-agent-toolkit/websocket-realtime"><img src="https://agentmods.dev/badge/skills/hoangatg/ai-agent-toolkit/websocket-realtime.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00039 | $0.00814 |
| Opus 5 | $0.00019 | $0.00407 |
| Sonnet 5 | $0.00008 | $0.00163 |
| Haiku 4.5 | $0.00004 | $0.00081 |
Grade A, and why
websocket-realtime scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.
WebSocket & Real-time
When polling isn't fast enough, push.
1. Technology Selection
| Technology | Direction | Best For |
|---|---|---|
| WebSocket | Bidirectional | Chat, gaming, collaboration |
| SSE (Server-Sent Events) | Server → Client | Notifications, live feeds |
| Long Polling | Simulated push | Legacy browser support |
| WebRTC | Peer-to-peer | Video, audio, P2P data |
| WebTransport | Bidirectional (HTTP/3) | Next-gen, bleeding edge |
Decision Matrix
Need bidirectional? → WebSocket
Server push only? → SSE (simpler, auto-reconnect)
P2P media? → WebRTC
Legacy support? → Long Polling (fallback)
2. WebSocket Patterns
Libraries
| Library | Ecosystem | Features |
|---|---|---|
| Socket.io | Node.js | Rooms, namespaces, fallback |
| ws | Node.js (raw) | Lightweight, no overhead |
| Pusher/Ably | Managed | Hosted, scaled for you |
| Supabase Realtime | Supabase | Postgres changes live |
Room/Channel Pattern
| Concept | Purpose |
|---|---|
| Rooms | Group connections by context (chat room, game) |
| Namespaces | Separate concerns (chat vs notifications) |
| Broadcasting | Send to all in room except sender |
3. Scaling WebSockets
| Challenge | Solution |
|---|---|
| Sticky sessions | Load balancer affinity |
| Multi-server | Redis pub/sub adapter |
| Connection limits | Horizontal scaling + connection pooling |
| State sync | CRDT or operational transforms |
4. Reliability Patterns
| Pattern | Purpose |
|---|---|
| Heartbeat/Ping | Detect dead connections |
| Auto-reconnect | Exponential backoff on disconnect |
| Message queue | Buffer during disconnection |
| Acknowledgments | Confirm message delivery |
| Idempotency | Handle duplicate messages |
5. Live Collaboration
| Pattern | Use Case |
|---|---|
| CRDT | Conflict-free concurrent editing |
| OT (Operational Transform) | Google Docs-style collaboration |
| Last Write Wins | Simple, some data loss OK |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 120 lines · 39 tokens per session scan A 71bee8a05210
websocket-realtime is a skill published in the GitHub repository hoangatg/ai-agent-toolkit (1 stars, last pushed 5mo ago), licensed MIT. It adds 39 tokens to every session and 814 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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