multiplayer SKILL.md skillA

multiplayer from summerengine/summer is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add summerengine/summer/multiplayer@git:20261028.4db10ef

Pins git:20261028.4db10ef in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: summerengine/summer
Path: plugins/claude/skills/multiplayer/SKILL.md
Versions recorded: 5
Latest version: git:20261028.4db10ef, committed Oct 28, 2026
First version recorded: Oct 22, 2026
Size: 9,197 bytes
Repository stars: 92
License: MIT

Start here for Summer multiplayer: how authority, clients, Worlds and Sessions fit, and what comes next.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# /multiplayer — how Summer multiplayer works

Read this first, whatever the user asked for: "multiplayer", "co-op", "PvP",
"online", "play with friends", "lobby", "peer-to-peer", "host a game",
"netcode", "sync players". It explains the model in one page and sends you to
the skill that builds the next piece.

## The picture

A Summer multiplayer game is **one project with two entry scenes**:

- the **client** scene, which every player runs: input, camera, visuals, UI;
- the **authority** scene, which runs headless as the match server and owns
  the rules.

```text
   each player's device                   Summer hosting (or Local Play)
  ┌──────────────────────┐  my pose       ┌──────────────────────────────┐
  │ client scene         │ ─────────────► │ authority scene = one World  │
  │ moves its own player │  "collect"     │ checks every pose and request│
  │ draws everyone else  │ ─────────────► │ owns score, doors, items...  │
  │                      │ ◄───────────── │                              │
  └──────────────────────┘  state, events └──────────────────────────────┘
```

- A running match is a **World**. Summer starts one authority for it; the game
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add summerengine/summer/multiplayer@sha256:6550978146a2e129

The line at the top of this page pins the label git:20261028.4db10ef, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_mhrxrunhh2nsvo5u.svg)](https://markdownregistry.com/a/art_mhrxrunhh2nsvo5u)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Oct 22, 2026 and Oct 28, 2026, about one every 2 days.

version	committed	commit	size	audit
git:20261028.4db10ef latest	2026-10-28	4db10ef	9,197 B	A	view · diff
git:20261025.1fd730e	2026-10-25	1fd730e	9,197 B	A	view · diff
git:20261023.30b1fb7	2026-10-23	30b1fb7	9,197 B	A	view · diff
git:20261023.3cb07c4	2026-10-23	3cb07c4	9,197 B	A	view · diff
git:20261022.4000773	2026-10-22	4000773	9,197 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (9197 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

summerengine/summer · 92 stars · license MIT · pushed 2026-11-06 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_mhrxrunhh2nsvo5u
GET https://markdownregistry.com/api/v1/resolve?ref=summerengine/summer/multiplayer
GET https://markdownregistry.com/api/v1/blob/6550978146a2e1292a8a43acba8d91d1eb11ec4ce5a1e55825ad09e20213a474

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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AGENTS.md AGENTS.md file

summerengine/summer · AGENTS.md

git:20261104.7900e78 · audit A · 92 stars

3d-lighting SKILL.md skill

summerengine/summer · library/skills/3d-lighting/SKILL.md · Light a 3D scene: sun, omni and spot lights, WorldEnvironment, sky, shadows and ambient.