unity-multiplayer-engineer

unity-multiplayer-engineer is a skill for Claude Code from poorvith-mp/skills-gamedev. It costs 23 tokens per session (69 once invoked), scanned A, original, MIT.

A guide for adding multiplayer to Unity games with Netcode for GameObjects, Relay, and Lobby services. Relay connects players without exposing a host’s IP address, while Lobby supports finding and joining games.

In plain words
What is it for?
Use it to build client-server gameplay, matchmaking and player-hosted connections, synchronized state, lag compensation, prediction, and server-side input validation.
Why use it?
It helps keep the server as the trusted source of game state, handle players behind different network setups, and reduce desynchronization and cheating risks.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the skills-gamedev plugin — 48 skills shipped together

Good fit Use it to build client-server gameplay, matchmaking and player-hosted connections, synchronized state, lag compensation, prediction, and server-side input validation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/poorvith-mp/skills-gamedev/unity-multiplayer-engineer
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.

Any agent
npx skills add poorvith-mp/skills-gamedev --skill unity-multiplayer-engineer
Clone the repo
git clone --depth 1 https://github.com/poorvith-mp/skills-gamedev

Made for: Claude Code.

Or install skills-gamedev, the plugin that ships this one along with the rest of its 48 skills.

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 unity-multiplayer-engineer

README.md
[![agentmods](https://agentmods.dev/badge/skills/poorvith-mp/skills-gamedev/unity-multiplayer-engineer/github.svg)](https://agentmods.dev/skills/poorvith-mp/skills-gamedev/unity-multiplayer-engineer)
Your own site
<a href="https://agentmods.dev/skills/poorvith-mp/skills-gamedev/unity-multiplayer-engineer"><img src="https://agentmods.dev/badge/skills/poorvith-mp/skills-gamedev/unity-multiplayer-engineer/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.

agentmods 80×15 button for unity-multiplayer-engineer

Your own site · 80×15
<a href="https://agentmods.dev/skills/poorvith-mp/skills-gamedev/unity-multiplayer-engineer"><img src="https://agentmods.dev/badge/skills/poorvith-mp/skills-gamedev/unity-multiplayer-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 69 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00023 $0.00069
Opus 5 $0.00012 $0.00034
Sonnet 5 $0.00005 $0.00014
Haiku 4.5 $0.00002 $0.00007

Measured 2d ago against content hash eebb1a441253, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

unity-multiplayer-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 2d 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.

skills/unity-multiplayer-engineer/SKILL.md · 9 lines

What it actually says

Deprecated: unity-multiplayer-engineer

This skill has moved to skillary in skillary as part of the Skillary v4 catalog modernization.

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago Changed · -38 lines · -24 tokens per session eebb1a441253
  2. 8d ago First seen · 47 lines · 47 tokens per session scan A 20d0556f3cf5

Subscribe to this mod's changes

unity-multiplayer-engineer is a skill published in the GitHub repository poorvith-mp/skills-gamedev (4 stars, last pushed 2d ago), licensed MIT. It adds 23 tokens to every session and 69 once invoked, about $0.0001 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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