Fantasy Framework Development Guide
qq362946/Fantasy
Development and review guide for the Fantasy C# distributed game server framework: ECS, FTask, routing, service discovery, config and databases.
Multiplayer game development principles. An agent skill from xenitV1/Antigravity-Workflows.
Install Multiplayer
$ npx skills add xenitV1/Antigravity-Workflows --skill multiplayer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install xenitV1/Antigravity-Workflows multiplayer --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/game-development/multiplayer .claude/skills/multiplayer && rm -rf skills-srcUse ~/.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/
Install the "multiplayer" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/game-development/multiplayer into .claude/skills/multiplayer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multiplayer", 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 install https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/game-development/multiplayerType 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.
$ npx skills add xenitV1/Antigravity-Workflows --skill multiplayer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install xenitV1/Antigravity-Workflows multiplayer --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/game-development/multiplayer .agents/skills/multiplayer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "multiplayer" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/game-development/multiplayer into .agents/skills/multiplayer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multiplayer", 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.
$ npx skills add xenitV1/Antigravity-Workflows --skill multiplayer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install xenitV1/Antigravity-Workflows multiplayer --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/game-development/multiplayer .cursor/skills/multiplayer && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "multiplayer" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/game-development/multiplayer into .cursor/skills/multiplayer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multiplayer", 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 https://github.com/xenitV1/Antigravity-Workflows.git --path skills/game-development/multiplayer--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add xenitV1/Antigravity-Workflows --skill multiplayer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install xenitV1/Antigravity-Workflows multiplayer --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/game-development/multiplayer .gemini/skills/multiplayer && rm -rf skills-srcUse ~/.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/
Install the "multiplayer" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/game-development/multiplayer into .gemini/skills/multiplayer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multiplayer", 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.
$ gh skill install xenitV1/Antigravity-Workflows multiplayerInstalls 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).
$ npx skills add xenitV1/Antigravity-Workflows --skill multiplayer -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/game-development/multiplayer .github/skills/multiplayer && rm -rf skills-srcUse ~/.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/
Install the "multiplayer" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/game-development/multiplayer into .github/skills/multiplayer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multiplayer", 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.
$ npx skills add xenitV1/Antigravity-Workflows --skill multiplayer -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install xenitV1/Antigravity-Workflows multiplayer --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/xenitV1/Antigravity-Workflows.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/game-development/multiplayer .opencode/skills/multiplayer && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "multiplayer" agent skill from https://github.com/xenitV1/Antigravity-Workflows/tree/main/skills/game-development/multiplayer into .opencode/skills/multiplayer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "multiplayer", 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
multiplayer- GitHub stars
- 130
- Used in
- 7 other repos
- Token cost
- ~686 tokens
- SKILL.md length
- 204 words
- Files
- 1
- Skills in repo
- 42
- Repo updated
- First seen
- Licence
- MIT
At a glance
Multiplayer game development principles. An agent skill from xenitV1/Antigravity-Workflows.
- Works in 6 steps: Architecture Selection → Synchronization Principles → Network Optimization → …
- Tasks that involve Game development
- SKILL.md covers 1. Architecture Selection, 2. Synchronization Principles, 3. Network Optimization and 4. Security Principles, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Multiplayer is an agent skill from xenitV1/Antigravity-Workflows. Multiplayer game development principles. Architecture, networking, synchronization.
Its SKILL.md is about 690 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Game Development, covering Game development and Multiplayer and networking. The licence is MIT.
When your agent uses it
- Tasks that involve Game development
- Tasks that involve Multiplayer and networking
Example prompts
- “/multiplayer”
Requirements
- Pre-approved tools (allowed-tools): Read, Write, Edit, Glob, Grep, Bash
Workflow steps
6 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit f0a1fa7. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadWriteEditGlobGrepBash
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
Multiplayer loads about 686 tokens when it runs. Until then it costs about 24 tokens; SKILL.md has 204 words of instructions outside code blocks.
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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Read, Write, Edit, Glob, Grep, Bash
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 xenitV1/Antigravity-Workflows at commit f0a1fa7, republished under its MIT licence (© xenitV1). 204 words, ~686 tokens.
Download SKILL.mdSave it as
.claude/skills/multiplayer/SKILL.md (or your agent's skills folder).- name
- multiplayer
- description
- Multiplayer game development principles. Architecture, networking, synchronization.
- allowed-tools
- Read, Write, Edit, Glob, Grep, Bash
Multiplayer Game Development
Networking architecture and synchronization principles.
1. Architecture Selection
Decision Tree
What type of multiplayer?
│
├── Competitive / Real-time
│ └── Dedicated Server (authoritative)
│
├── Cooperative / Casual
│ └── Host-based (one player is server)
│
├── Turn-based
│ └── Client-server (simple)
│
└── Massive (MMO)
└── Distributed serversComparison
| Architecture | Latency | Cost | Security |
|---|---|---|---|
| Dedicated | Low | High | Strong |
| P2P | Variable | Low | Weak |
| Host-based | Medium | Low | Medium |
2. Synchronization Principles
State vs Input
| Approach | Sync What | Best For |
|---|---|---|
| State Sync | Game state | Simple, few objects |
| Input Sync | Player inputs | Action games |
| Hybrid | Both | Most games |
Lag Compensation
| Technique | Purpose |
|---|---|
| Prediction | Client predicts server |
| Interpolation | Smooth remote players |
| Reconciliation | Fix mispredictions |
| Lag compensation | Rewind for hit detection |
3. Network Optimization
Bandwidth Reduction
| Technique | Savings |
|---|---|
| Delta compression | Send only changes |
| Quantization | Reduce precision |
| Priority | Important data first |
| Area of interest | Only nearby entities |
Update Rates
| Type | Rate |
|---|---|
| Position | 20-60 Hz |
| Health | On change |
| Inventory | On change |
| Chat | On send |
4. Security Principles
Server Authority
Client: "I hit the enemy"
Server: Validate → did projectile actually hit?
→ was player in valid state?
→ was timing possible?Anti-Cheat
| Cheat | Prevention |
|---|---|
| Speed hack | Server validates movement |
| Aimbot | Server validates sight line |
| Item dupe | Server owns inventory |
| Wall hack | Don't send hidden data |
5. Matchmaking
Considerations
| Factor | Impact |
|---|---|
| Skill | Fair matches |
| Latency | Playable connection |
| Wait time | Player patience |
| Party size | Group play |
6. Anti-Patterns
| ❌ Don't | ✅ Do |
|---|---|
| Trust the client | Server is authority |
| Send everything | Send only necessary |
| Ignore latency | Design for 100-200ms |
| Sync exact positions | Interpolate/predict |
Remember: Never trust the client. The server is the source of truth.
© xenitV1, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/game-development/multiplayer of xenitV1/Antigravity-Workflows.
Open the folder on GitHubat commit f0a1fa7
Used in 7 other repositories
We found 17 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 7 other GitHub owners. This page covers the copy in xenitV1/Antigravity-Workflows, which our catalogue first saw on October 7, 2026.
- davila7/claude-code-templatescli-tool/components/skills/creative-design/game-development/multiplayer
- aiskillstore/marketplaceskills/sickn33/multiplayerskills/sickn33/game-development/multiplayer
- sickn33/agentic-awesome-skillsskills/game-development/multiplayerplugins/agentic-awesome-skills/skills/game-development/multiplayer+1 more
- agent-skills-hub/agent-skills-hubskills/game-development/multiplayer
- lingxling/awesome-skills-cnantigravity-awesome-skills/skills/game-development/multiplayerantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/game-development/multiplayer+1 more
- benjaminasterA/antigravity-awesome-skillsskills/game-development/multiplayer
- henryalouf/ruflow.agents/skills/game-development/multiplayer.agents/skills/antigravity-awesome-skills/skills/game-development/multiplayer+4 more
Compare with similar skills
Multiplayer 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Multiplayer this skillxenitV1/Antigravity-Workflows | 130 | 7 repos | ~686 | Automated safety check: Notes | MIT | |
| Fantasy Framework Development Guideqq362946/Fantasy | 1.4k | — | ~5.8k | Automated safety check: Pass | Custom licence | |
| Validate GsdkPlayFab/gsdk | 170 | — | ~645 | Automated safety check: Pass | Apache-2.0 | |
| Game DeveloperJeffallan/claude-skills | 12k | — | ~1.5k | Automated safety check: Pass | MIT | |
| Unreal Character Movement Componentquodsoler/unreal-engine-skills | 359 | — | ~8.5k | Automated safety check: Pass | MIT | |
| Godot Server Architecturethedivergentai/GD-Agentic-Skills | 803 | — | ~2.9k | Automated safety check: Pass | LGPL-3.0 |
Similar skills
Validate Gsdk
PlayFab/gsdk
Validates PlayFab Game Server SDK (GSDK) integrations in game server projects.
Game Developer
Jeffallan/claude-skills
Covers game programming in Unity and Unreal Engine: ECS design, physics, multiplayer networking, shaders and profiling toward a 60 FPS target.
Unreal Character Movement Component
quodsoler/unreal-engine-skills
Reference for writing and debugging UCharacterMovementComponent code in Unreal Engine C++: custom movement modes, floor detection, root motion, prediction and gravity.
Godot Server Architecture
thedivergentai/GD-Agentic-Skills
Expert blueprint for dedicated / headless multiplayer hosts: ENet/DTLS, authority validation, safe packet decode, matchmaker handoff, and health telemetry.
Godot Adapt Single To Multiplayer
thedivergentai/GD-Agentic-Skills
Expert patterns for adding multiplayer to single-player games including client-server architecture, authoritative server design, MultiplayerSynchronizer, lag compensation (client prediction, server…
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Categories
Questions about Multiplayer
What does Multiplayer do?
Multiplayer game development principles. An agent skill from xenitV1/Antigravity-Workflows. Multiplayer is an agent skill from xenitV1/Antigravity-Workflows. Multiplayer game development principles.
When should I use Multiplayer?
Multiplayer fits situations like: tasks that involve Game development; tasks that involve Multiplayer and networking.
How do I install Multiplayer in Claude Code?
Run `npx skills add xenitV1/Antigravity-Workflows --skill multiplayer -a claude-code`. Or copy the skill folder (skills/game-development/multiplayer in xenitV1/Antigravity-Workflows) into .claude/skills/multiplayer in your project. Claude Code loads it when a task matches its description.
How do I install Multiplayer in Codex?
Run `npx skills add xenitV1/Antigravity-Workflows --skill multiplayer -a codex`. Or copy the skill folder (skills/game-development/multiplayer in xenitV1/Antigravity-Workflows) into .agents/skills/multiplayer in your project. Codex loads it when a task matches its description.
Can I use Multiplayer 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 xenitV1/Antigravity-Workflows --skill multiplayer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/multiplayer, .gemini/skills/multiplayer, .github/skills/multiplayer and .opencode/skills/multiplayer in your project.
What does Multiplayer need to run?
SKILL.md names no scripts, command-line tools or credentials: Multiplayer is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Glob, Grep, Bash.
Does Multiplayer 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 Multiplayer safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Multiplayer use?
Multiplayer is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Multiplayer use?
About 686 tokens (SKILL.md is roughly 2.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Multiplayer?
Skills that share tags, products or a category with Multiplayer: Fantasy Framework Development Guide (qq362946/Fantasy, 1.4k stars), Validate Gsdk (PlayFab/gsdk, 170 stars), Game Developer (Jeffallan/claude-skills, 12k stars) and Unreal Character Movement Component (quodsoler/unreal-engine-skills, 359 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Multiplayer?
xenitV1 (a GitHub user) maintains it in xenitV1/Antigravity-Workflows, which has 130 GitHub stars. The repository holds 42 skills in this directory. The repository was last updated on January 14, 2026.
Source: xenitV1/Antigravity-Workflows on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.