realtime-engineer

realtime-engineer is an agent for coding agents from hoangatg/ai-agent-toolkit. It costs 64 tokens per session (270 once invoked), scanned A, original, MIT.

A coding assistant focused on software that updates users immediately, such as chat, notifications, live dashboards, shared editing, and multiplayer games. It covers WebSockets, Server-Sent Events, message broadcasting, scaling, and handling simultaneous changes.

In plain words
What is it for?
Use it for chat and messaging, live notifications, streaming updates, collaborative editing, multiplayer networking, and event-driven systems.
Why use it?
It helps plan and build features where people or systems need to see changes without refreshing the page. It also addresses reconnecting users, coordinating shared changes, and supporting more traffic.

Agent

Install

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.

agentmods
npx agentmods add agents/hoangatg/ai-agent-toolkit/realtime-engineer
Clone the repo
git clone --depth 1 https://github.com/hoangatg/ai-agent-toolkit

Wrote 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.

agentmods badge for realtime-engineer

README.md
[![agentmods](https://agentmods.dev/badge/agents/hoangatg/ai-agent-toolkit/realtime-engineer.svg)](https://agentmods.dev/agents/hoangatg/ai-agent-toolkit/realtime-engineer)
Your own site
<a href="https://agentmods.dev/agents/hoangatg/ai-agent-toolkit/realtime-engineer"><img src="https://agentmods.dev/badge/agents/hoangatg/ai-agent-toolkit/realtime-engineer.svg" alt="Measured on agentmods" height="20"></a>
Per session 64 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 270 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00064 $0.00270
Opus 5 $0.00032 $0.00135
Sonnet 5 $0.00013 $0.00054
Haiku 4.5 $0.00006 $0.00027

Measured 4d ago against content hash 806ca1b12c72, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

realtime-engineer 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 4d 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.

.agent/agents/realtime-engineer.md · 34 lines

What it actually says

Realtime Engineer

Expert in building real-time communication systems and live collaborative features.

Core Philosophy

"Real-time is not just speed — it's about presence, responsiveness, and shared experiences."

Expertise Areas

  • WebSocket: Connection management, reconnection, heartbeats
  • Server-Sent Events: One-way streaming, event-driven updates
  • Pub/Sub: Redis Pub/Sub, message queues, event broadcasting
  • Collaboration: Operational transforms, CRDTs, conflict resolution
  • Scaling: Horizontal scaling, sticky sessions, backpressure

When You Should Be Used

  • Building real-time chat and messaging systems
  • Implementing live notifications and dashboards
  • Creating collaborative editing features
  • Building multiplayer game networking
  • Designing event-driven streaming architectures
Changes

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.

  1. 4d ago First seen · 34 lines · 64 tokens per session scan A 806ca1b12c72

Subscribe to this mod's changes

realtime-engineer is an agent published in the GitHub repository hoangatg/ai-agent-toolkit (1 stars, last pushed 5mo ago), licensed MIT. It adds 64 tokens to every session and 270 once invoked, about $0.0003 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 2026-08-31.

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