skill CX Codex

build-live-game — Claude Code skill: what it does, how to install

Q: How to install build-live-game in Claude Code?

Run `npx skills add Unity-Technologies/skills --skill build-live-game -a claude-code`. The skill lands in `~/.claude/skills/build-live-game/SKILL.md` and is picked up on the next session.

Q: Which Unity packages does it need?

At least `com.unity.services.core` 1.16.0, `com.unity.services.authentication` 3.6.1, `com.unity.services.cloudsave` 3.4.0, `com.unity.services.cloudcode` 2.10.3 and `com.unity.remote-config` 4.2.5.

Brings Unity Gaming Services into a project: player accounts, cloud saves, leaderboards, Cloud Code and Remote Config. Useful when live-ops features get built inside the Unity Editor.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓

npx skills add Unity-Technologies/skills --skill build-live-game -a claude-code

Open on GitHub

What build-live-game does

The skill walks an agent through Unity's backend: player sign-in, cloud saves, leaderboards, Cloud Code, Remote Config, analytics, sessions and matchmaking. What comes with it: a package map with minimum versions (com.unity.services.core 1.16.0, com.unity.services.cloudcode 2.10.3, com.unity.remote-config 4.2.5 among others), the initialization pattern, and a diagram of how the services connect.

Startup looks the same everywhere. Call UnityServices.InitializeAsync(), then sign in — anonymous, for instance, via AuthenticationService.Instance.SignInAnonymouslyAsync(). Singletons such as CloudSaveService.Instance stay unusable until that finishes. Player data then splits across Cloud Save's three access classes: the owner writes Default and Public, anyone can read Public, Protected belongs to the server.

This is where hand-rolled backends break. XP, currency, rewards written straight from the client are a memory edit on the device. Sending those writes through Cloud Code modules (.ccmr, C# on .NET 9) closes the hole, and for production the skill recommends C# modules over JavaScript scripts. Cloud resources deploy from the Deployment window in the Editor.

What it helps with

wire up player sign-in and read the returned PlayerId
store progress and preferences in Cloud Save with separate access classes
move currency and XP grants into Cloud Code modules
build a leaderboard that accepts score submissions and lists ranks
push .rc, .ac and .ccmr files from the Editor's Deployment window

Example prompts for the agent

Sign players in anonymously with Unity Authentication and keep their progress in Cloud Save, with Protected keys written only from Cloud Code.
Set up a leaderboard that takes score submissions and returns the top players.
Verify that Remote Config values load right after UnityServices.InitializeAsync() when the scene starts.

How to install build-live-game

1Skills CLI (Vercel)

npx skills add Unity-Technologies/skills --skill build-live-game -a claude-code

2Manually: put the files in place

~/.claude/skills/build-live-game/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/build-live-game/

1Skills CLI (Vercel)

npx skills add Unity-Technologies/skills --skill build-live-game -a codex

2Manually: put the files in place

.agents/skills/build-live-game/SKILL.md

For all projects use ~/.agents/skills/

1Skills CLI (Vercel)

npx skills add Unity-Technologies/skills --skill build-live-game -a cursor

2Manually: put the files in place

.cursor/skills/build-live-game/SKILL.md

Cursor also reads .agents/skills/ and .claude/skills/

1GitHub CLI

gh skill install Unity-Technologies/skills build-live-game

2Manually: put the files in place

.github/skills/build-live-game/SKILL.md

1Skills CLI (Vercel)

npx skills add Unity-Technologies/skills --skill build-live-game -a gemini-cli

2Platform CLI

gemini skills install https://github.com/Unity-Technologies/skills --path skills/build-live-game

Manually: put the files in place

.devin/skills/build-live-game/SKILL.md

The legacy .windsurf/skills/ path still works

Skills CLI (Vercel)

npx skills add Unity-Technologies/skills --skill build-live-game -a opencode

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about build-live-game

How to install build-live-game in Claude Code?

Run npx skills add Unity-Technologies/skills --skill build-live-game -a claude-code. The skill lands in ~/.claude/skills/build-live-game/SKILL.md and is picked up on the next session.

What does build-live-game do?

It lets an agent assemble a Unity Gaming Services backend: player accounts, cloud saves, leaderboards, Cloud Code and Remote Config, with the initialization pattern and a package map to work from.

Which Unity packages does it need?

At least com.unity.services.core 1.16.0, com.unity.services.authentication 3.6.1, com.unity.services.cloudsave 3.4.0, com.unity.services.cloudcode 2.10.3 and com.unity.remote-config 4.2.5.

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