multiplayer-state-machine-coverage SKILL.md skillA

multiplayer-state-machine-coverage from testland/qa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add testland/qa/multiplayer-state-machine-coverage@v1.4.17

Pins v1.4.17 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
testland/qa
Path
plugins/qa-game/skills/multiplayer-state-machine-coverage/SKILL.md
Versions recorded
5
Latest version
v1.4.17, committed Oct 11, 2026
First version recorded
Jul 20, 2026
Size
14,986 bytes
Repository stars
11
License
MIT

Build a coverage matrix for a networked-game state machine that exercises connect / authority-handoff / disconnect / reconnect / host-migration paths across Unity Netcode for GameObjects, Unreal Engine replication, and Mirror Networking. Workflow: enumerate the engine's connection states + ownership states + replicated-property update rules, cross them against latency / loss / out-of-order packet injection, encode each combination as a test fixture, and emit a go / no-go gate. Use before…

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-state-machine-coverage

## Overview

Networked games are state machines: each player connection, each
replicated entity, and each authority handoff transitions through
a documented set of states. Cert failures and on-the-wire bugs
overwhelmingly happen at **transition edges** - connect, host
migration, disconnect-mid-action, reconnect-after-network-loss - 
not in the steady-state gameplay loop.

This skill is a **build-an-X workflow**: produce a **state-machine
coverage matrix** that enumerates every connection + ownership +
replication state in your engine, crosses it with the network
fault matrix (latency / loss / out-of-order / disconnect), and
emits a fixture list + a go / no-go gate.

Composes with:

- `platform-cert-overview-reference` - multiplayer testing is a cross-axis over functional /
  compliance / compatibility / performance; the matrix maps onto Xbox **XR-067 (MPSD session state)**,
  **XR-064 (joinable sessions)**, **XR-115 (controller / user
  add and remove)**, and **XR-074 (loss of connectivity)**, all
  cited inline below from the
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add testland/qa/multiplayer-state-machine-coverage@sha256:702af76459ae74d9

The line at the top of this page pins the label v1.4.17, 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_7hgcdoizousollxt.svg)](https://markdownregistry.com/a/art_7hgcdoizousollxt)

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

Versions

The registry has recorded 5 versions of this file, between Jul 20, 2026 and Oct 11, 2026, about one every 21 days.

versioncommittedcommitsizeaudit
v1.4.17 latest2026-10-11 a1bd3f7 14,986 BA view · diff
git:20260813.4a11cd62026-08-13 4a11cd6 14,966 BA view · diff
git:20260728.1bce4242026-07-28 1bce424 15,003 BA view · diff
git:20260724.d4db7562026-07-24 d4db756 19,440 BA view · diff
git:20260720.b72674a2026-07-20 b72674a 19,765 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 (14986 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

testland/qa · 11 stars · license MIT · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_7hgcdoizousollxt
GET https://markdownregistry.com/api/v1/resolve?ref=testland/qa/multiplayer-state-machine-coverage
GET https://markdownregistry.com/api/v1/blob/702af76459ae74d9f6b9912a6f38a369fc3f38d885ca2dc47e0931afa3422334

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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