Agent skill

Validate Gsdk

Validates PlayFab Game Server SDK (GSDK) integrations in game server projects.

Apache-2.0Auto-check passedGame Development

Install Validate Gsdk

skills CLI

$ npx skills add PlayFab/gsdk --skill validate-gsdk -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install PlayFab/gsdk validate-gsdk --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/PlayFab/gsdk.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.github/skills/validate-gsdk .claude/skills/validate-gsdk && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "validate-gsdk" agent skill from https://github.com/PlayFab/gsdk/tree/main/.github/skills/validate-gsdk into .claude/skills/validate-gsdk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-gsdk", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/PlayFab/gsdk/tree/main/.github/skills/validate-gsdk

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add PlayFab/gsdk --skill validate-gsdk -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install PlayFab/gsdk validate-gsdk --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/PlayFab/gsdk.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.github/skills/validate-gsdk .agents/skills/validate-gsdk && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "validate-gsdk" agent skill from https://github.com/PlayFab/gsdk/tree/main/.github/skills/validate-gsdk into .agents/skills/validate-gsdk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-gsdk", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add PlayFab/gsdk --skill validate-gsdk -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install PlayFab/gsdk validate-gsdk --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/PlayFab/gsdk.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.github/skills/validate-gsdk .cursor/skills/validate-gsdk && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "validate-gsdk" agent skill from https://github.com/PlayFab/gsdk/tree/main/.github/skills/validate-gsdk into .cursor/skills/validate-gsdk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-gsdk", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/PlayFab/gsdk.git --path .github/skills/validate-gsdk

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add PlayFab/gsdk --skill validate-gsdk -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install PlayFab/gsdk validate-gsdk --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/PlayFab/gsdk.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.github/skills/validate-gsdk .gemini/skills/validate-gsdk && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "validate-gsdk" agent skill from https://github.com/PlayFab/gsdk/tree/main/.github/skills/validate-gsdk into .gemini/skills/validate-gsdk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-gsdk", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install PlayFab/gsdk validate-gsdk

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add PlayFab/gsdk --skill validate-gsdk -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/PlayFab/gsdk.git skills-src && mkdir -p .github/skills && cp -r skills-src/.github/skills/validate-gsdk .github/skills/validate-gsdk && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "validate-gsdk" agent skill from https://github.com/PlayFab/gsdk/tree/main/.github/skills/validate-gsdk into .github/skills/validate-gsdk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-gsdk", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add PlayFab/gsdk --skill validate-gsdk -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install PlayFab/gsdk validate-gsdk --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/PlayFab/gsdk.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.github/skills/validate-gsdk .opencode/skills/validate-gsdk && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "validate-gsdk" agent skill from https://github.com/PlayFab/gsdk/tree/main/.github/skills/validate-gsdk into .opencode/skills/validate-gsdk/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validate-gsdk", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: validate-gsdk
GitHub stars: 170
Token cost: ~645 tokens
SKILL.md length: 267 words
Files: 7 (incl. references)
Skills in repo: 1
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Validates PlayFab Game Server SDK (GSDK) integrations in game server projects.

Works in 4 steps: Detect SDK Language → Validate Universal Rules → Report → …
Fix a GSDK implementation
SKILL.md covers Step 1: Detect SDK Language, Step 2: Validate Universal Rules, Step 3: Report and Step 4: Ask User
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Validate Gsdk is an agent skill from PlayFab/gsdk. Validates PlayFab Game Server SDK (GSDK) integrations in game server projects. Use when asked to check, validate, audit, or fix a GSDK implementation. Supports C++, C, Java, Unity, and Unreal SDKs.

Its SKILL.md is about 650 tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including reference files (for example `README.md`, `references/cpp.md` and `references/csharp.md`).

It sits in Game Development, covering Game development and Multiplayer and networking. It works with C++, C# and Java. The repository describes itself as: Game Server SDK for PlayFab Multiplayer Servers. The licence is Apache-2.0.

When your agent uses it

Fix a GSDK implementation
Tasks that involve Game development
Tasks that involve Multiplayer and networking

Example prompts

“Use the validate-gsdk skill to validate PlayFab Game Server SDK (GSDK) integrations in game server projects”
“/validate-gsdk”

Workflow steps

4 steps, taken from the step headings in SKILL.md.

Detect SDK Language
Validate Universal Rules
Report
Ask User

What it can do on your machine

Read from SKILL.md and the folder at commit 0a60585. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Validate Gsdk loads about 645 tokens when it runs, and up to ~2.5k if it reads all its reference files. Until then it costs about 53 tokens; SKILL.md has 267 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~53
When it runs · the whole SKILL.md, loaded when a task matches: ~645
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~2.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from PlayFab/gsdk at commit 0a60585, republished under its Apache-2.0 licence (© PlayFab). 267 words, ~645 tokens.

Download SKILL.mdSave it as .claude/skills/validate-gsdk/SKILL.md (or your agent's skills folder). This skill also uses 6 other files; get the full folder from GitHub.

name: validate-gsdk
description: Validates PlayFab Game Server SDK (GSDK) integrations in game server projects. Use when asked to check, validate, audit, or fix a GSDK implementation. Supports C++, C#, Java, Unity, and Unreal SDKs.

Validate GSDK Integration

You are a PlayFab GSDK integration validator. Scan the developer's project, detect which SDK language they use, validate their integration against known rules, and help fix any issues.

Step 1: Detect SDK Language

Search the project for these markers (stop at first match):

Marker	SDK	Reference
`*.uproject` with PlayFabGSDK in Plugins	Unreal	references/unreal.md
`ProjectSettings/` + `PlayFabMultiplayerAgentAPI` usage	Unity	references/unity.md
`CMakeLists.txt` or `*.vcxproj` referencing gsdk/cppsdk	C++	references/cpp.md
`*.csproj` with `com.playfab.csharpgsdk`	C#	references/csharp.md
`build.gradle` or `pom.xml` with `com.playfab`	Java	references/java.md

If no GSDK usage found, tell the user and ask if they need help adding it.

Once detected, load the corresponding reference file for language-specific rules.

Step 2: Validate Universal Rules

These apply to all GSDK languages:

ID	Rule	Severity
U1	`start()` / `Start()` is called before other GSDK methods	Error
U2	`readyForPlayers()` / `ReadyForPlayers()` is called	Error
U3	A shutdown callback is registered	Error
U4	A health callback is registered	Warning
U5	`readyForPlayers()` does not block the main/UI thread	Warning
U6	`updateConnectedPlayers()` is called when players join/leave	Warning
U7	Session-only config keys (`SessionId`, `SessionCookie`) not read before allocation	Warning
U8	If `MaintenanceCallback` is used, suggest `MaintenanceV2Callback`	Info

Then check the language-specific rules from the loaded reference file.

Step 3: Report

For each violated rule, output:

[Severity] RuleID — Description
  File: path/to/file (line N)
  Fix: what to change

Group by severity: Error → Warning → Info. If no issues found, confirm the integration looks correct.

Step 4: Ask User

After reporting, ask: "Would you like me to apply these fixes to your code, or just present the diffs for review?"

If they want fixes applied: make minimal, targeted changes.
If they want review: show the proposed diff for each fix without modifying files.

Files

SKILL.md and 6 other files (references) in .github/skills/validate-gsdk of PlayFab/gsdk.

SKILL.md
README.md
references/cpp.md
references/csharp.md
references/java.md
references/unity.md
references/unreal.md

Open the folder on GitHubat commit 0a60585

Compare with similar skills

Validate Gsdk next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Validate Gsdk compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Validate Gsdk this skillPlayFab/gsdk	170	—	~645	Automated safety check: Pass	Apache-2.0	3 days ago
Unityericrisco/rsc-harness	167	—	~4k	Automated safety check: Pass	MIT	today
Game DeveloperJeffallan/claude-skills	12k	—	~1.5k	Automated safety check: Pass	MIT	4 days ago
Unreal Character Movement Componentquodsoler/unreal-engine-skills	359	—	~8.5k	Automated safety check: Pass	MIT	9 days ago
Beehavejame581/GodotPrompter	795	—	~2.8k	Automated safety check: Pass	MIT	yesterday
Headless BuildRandallLiuXin/GodotMaker	549	1 repos	~454	Automated safety check: Pass	Custom licence	20 days ago

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Works with

Questions about Validate Gsdk

What does Validate Gsdk do?

Validates PlayFab Game Server SDK (GSDK) integrations in game server projects. Validate Gsdk is an agent skill from PlayFab/gsdk. Validates PlayFab Game Server SDK (GSDK) integrations in game server projects.

When should I use Validate Gsdk?

Validate Gsdk fits situations like: fix a GSDK implementation; tasks that involve Game development; tasks that involve Multiplayer and networking.

How do I install Validate Gsdk in Claude Code?

Run `npx skills add PlayFab/gsdk --skill validate-gsdk -a claude-code`. Or copy the skill folder (.github/skills/validate-gsdk in PlayFab/gsdk) into .claude/skills/validate-gsdk in your project. Claude Code loads it when a task matches its description.

How do I install Validate Gsdk in Codex?

Run `npx skills add PlayFab/gsdk --skill validate-gsdk -a codex`. Or copy the skill folder (.github/skills/validate-gsdk in PlayFab/gsdk) into .agents/skills/validate-gsdk in your project. Codex loads it when a task matches its description.

Can I use Validate Gsdk in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add PlayFab/gsdk --skill validate-gsdk -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/validate-gsdk, .gemini/skills/validate-gsdk, .github/skills/validate-gsdk and .opencode/skills/validate-gsdk in your project.

What does Validate Gsdk need to run?

SKILL.md names no scripts, command-line tools or credentials: Validate Gsdk is instructions for the agent only.

Does Validate Gsdk access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Validate Gsdk safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Validate Gsdk use?

Validate Gsdk is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Validate Gsdk use?

About 645 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.9k tokens, read only when the agent opens those files.

What are the alternatives to Validate Gsdk?

Skills that share tags, products or a category with Validate Gsdk: Unity (ericrisco/rsc-harness, 167 stars), Game Developer (Jeffallan/claude-skills, 12k stars), Unreal Character Movement Component (quodsoler/unreal-engine-skills, 359 stars) and Beehave (jame581/GodotPrompter, 795 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Validate Gsdk?

PlayFab (a GitHub organization) maintains it in PlayFab/gsdk, which has 170 GitHub stars. The repository was last updated on October 5, 2026.

Source: PlayFab/gsdk on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Validate Gsdk

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Validate GSDK Integration

Step 1: Detect SDK Language

Step 2: Validate Universal Rules

Step 3: Report

Step 4: Ask User

Files

Compare with similar skills

Similar skills

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Unreal Character Movement Component

Beehave

Headless Build

Gdextension

Related

Questions about Validate Gsdk