# Setup Multiplayer

> Use when the user wants to add multiplayer to an existing single-player game — co-op LAN, co-op online, competitive PvP, or lobbies/matchmaking. Strong opinion that you start with Godot's high-level MultiplayerAPI plus MultiplayerSpawner and MultiplayerSynchronizer; only roll custom networking with a justified reason. Walks peer authority, RPC patterns, replication graph, and irreversible architecture decisions. Trigger on "multiplayer", "co-op", "PvP", "online", "netcode", "rollback", "MultiplayerAPI", "host migration", "matchmaking".

## Facts
- Page: https://tashan.sh/capability/skill-summerengine-setup-multiplayer
- tashan id: skill:SummerEngine/setup-multiplayer
- Source: https://github.com/SummerEngine/summer
- Type: skill
- Category: other
- tashan score: not scored (catalogued only — too little public evidence)
- Adoption: 9.0
- Upkeep: 79.0
- Freshness: 93.0
- Evidence coverage: 84% of the inputs this score can use
- Health: active
- Instruction depth: not yet graded
- License: MIT
- Official: no

## Install

```sh
cp -r setup-multiplayer ~/.claude/skills/
```

## Security audit
Not scanned. We audit npm-published capabilities; this one has no npm package we can resolve, or has not reached the queue. This is not a clean bill of health.

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Measured 2026-08-14 by tashan (https://tashan.sh) from public evidence. Scorer s5.