multiplayer-movement SKILL.md skillA

multiplayer-movement 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-movement@git:20261011.40a53f8

Pins git:20261011.40a53f8 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
summerengine/summer
Path
library/skills/multiplayer-movement/SKILL.md
Versions recorded
2
Latest version
git:20261011.40a53f8, committed Oct 11, 2026
First version recorded
Oct 6, 2026
Size
19,282 bytes
Repository stars
86
License
MIT

Client-side movement in Summer multiplayer: owners move instantly, others glide, the authority checks each pose.

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-movement — each player moves their own character

Step 2 of the multiplayer sequence. It continues the Courtyard game from
`multiplayer-project`; read that first if `network/game.gd` does not exist.
[files.md](files.md) has every file this step changes, complete, as it ran
under Local Play.

## How it works

Summer games use **client-side movement**:

- **The owner** runs the whole character controller locally: input, walking,
  gravity, jumping, collision. Its camera follows instantly, at any latency.
  About 20 times a second it **publishes its pose** (position, facing) to an
  owner-written State group.
- **The authority** runs no movement. It **checks every pose** with an
  acceptance policy: inside the level, no faster than the game allows, still
  the same player. A refused pose snaps the owner back to the last accepted
  one. The authority can also move a player on purpose (respawn, portal).
- **Everyone else** receives each accepted pose and draws it 100 ms in the
  past, gliding between poses, so remote players move smoothly through
  jitter and lost packets.

```text
 owner client                 authority                     other clients
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add summerengine/summer/multiplayer-movement@sha256:88d11c182e75a828

The line at the top of this page pins the label git:20261011.40a53f8, 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 badge

[![mdr](https://markdownregistry.com/badge/art_p4shfxtbx2wzmcfs.svg)](https://markdownregistry.com/a/art_p4shfxtbx2wzmcfs)

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

Versions

The registry has recorded 2 versions of this file, between Oct 6, 2026 and Oct 11, 2026, about one every 4 days.

versioncommittedcommitsizeaudit
git:20261011.40a53f8 latest2026-10-11 40a53f8 19,282 BA view · diff
git:20261006.cb682ef2026-10-06 cb682ef 19,294 BA 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 (19282 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 · 86 stars · license MIT · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_p4shfxtbx2wzmcfs
GET https://markdownregistry.com/api/v1/resolve?ref=summerengine/summer/multiplayer-movement
GET https://markdownregistry.com/api/v1/blob/88d11c182e75a828858216ae8e556a6efbb274399ed06078a16b2471287fb840

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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