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.
Source-anchored design rules for Netcode for GameObjects 2.x
Install Unity Netcode Design
$ npx skills add Besty0728/Unity-Skills --skill unity-netcode-design -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Besty0728/Unity-Skills unity-netcode-design --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/Besty0728/Unity-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/'SkillsForUnity/unity-skills~/skills/netcode-design' .claude/skills/unity-netcode-design && 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 "unity-netcode-design" agent skill from https://github.com/Besty0728/Unity-Skills/tree/main/SkillsForUnity/unity-skills~/skills/netcode-design into .claude/skills/unity-netcode-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unity-netcode-design", 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/Besty0728/Unity-Skills/tree/main/SkillsForUnity/unity-skills~/skills/netcode-designType 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 Besty0728/Unity-Skills --skill unity-netcode-design -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Besty0728/Unity-Skills unity-netcode-design --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Besty0728/Unity-Skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/'SkillsForUnity/unity-skills~/skills/netcode-design' .agents/skills/unity-netcode-design && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "unity-netcode-design" agent skill from https://github.com/Besty0728/Unity-Skills/tree/main/SkillsForUnity/unity-skills~/skills/netcode-design into .agents/skills/unity-netcode-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unity-netcode-design", 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 Besty0728/Unity-Skills --skill unity-netcode-design -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Besty0728/Unity-Skills unity-netcode-design --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Besty0728/Unity-Skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/'SkillsForUnity/unity-skills~/skills/netcode-design' .cursor/skills/unity-netcode-design && 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 "unity-netcode-design" agent skill from https://github.com/Besty0728/Unity-Skills/tree/main/SkillsForUnity/unity-skills~/skills/netcode-design into .cursor/skills/unity-netcode-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unity-netcode-design", 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/Besty0728/Unity-Skills.git --path 'SkillsForUnity/unity-skills~/skills/netcode-design'--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 Besty0728/Unity-Skills --skill unity-netcode-design -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Besty0728/Unity-Skills unity-netcode-design --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Besty0728/Unity-Skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/'SkillsForUnity/unity-skills~/skills/netcode-design' .gemini/skills/unity-netcode-design && 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 "unity-netcode-design" agent skill from https://github.com/Besty0728/Unity-Skills/tree/main/SkillsForUnity/unity-skills~/skills/netcode-design into .gemini/skills/unity-netcode-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unity-netcode-design", 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 Besty0728/Unity-Skills unity-netcode-designInstalls 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 Besty0728/Unity-Skills --skill unity-netcode-design -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Besty0728/Unity-Skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/'SkillsForUnity/unity-skills~/skills/netcode-design' .github/skills/unity-netcode-design && 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 "unity-netcode-design" agent skill from https://github.com/Besty0728/Unity-Skills/tree/main/SkillsForUnity/unity-skills~/skills/netcode-design into .github/skills/unity-netcode-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unity-netcode-design", 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 Besty0728/Unity-Skills --skill unity-netcode-design -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Besty0728/Unity-Skills unity-netcode-design --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Besty0728/Unity-Skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/'SkillsForUnity/unity-skills~/skills/netcode-design' .opencode/skills/unity-netcode-design && 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 "unity-netcode-design" agent skill from https://github.com/Besty0728/Unity-Skills/tree/main/SkillsForUnity/unity-skills~/skills/netcode-design into .opencode/skills/unity-netcode-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "unity-netcode-design", 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
unity-netcode-design- GitHub stars
- 1.8k
- Token cost
- ~1.2k tokens
- SKILL.md length
- 421 words
- Files
- 9
- Skills in repo
- 82
- Repo updated
- First seen
- Licence
- MIT
At a glance
Source-anchored design rules for Netcode for GameObjects 2.x
- Tasks that involve Multiplayer and networking
- SKILL.md covers Triggers, When to Load This Module, Critical Rule Summary… and Sub-doc Routing, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Unity Netcode Design is an agent skill from Besty0728/Unity-Skills. Source-anchored design rules for Netcode for GameObjects 2.x
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files (for example `LIFECYCLE.md`, `OWNERSHIP.md` and `PITFALLS.md`).
It sits in Game Development, covering Multiplayer and networking. The repository describes itself as: AI automation skills specifically designed for Unity. The licence is MIT.
When your agent uses it
- Tasks that involve Multiplayer and networking
Example prompts
- “/unity-netcode-design”
What it can do on your machine
Read from SKILL.md and the folder at commit 12a40e4. 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
Unity Netcode Design loads about 1.2k tokens when it runs. Until then it costs about 20 tokens; SKILL.md has 421 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 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 Besty0728/Unity-Skills at commit 12a40e4, republished under its MIT licence (© Besty0728). 421 words, ~1,164 tokens.
Download SKILL.mdSave it as
.claude/skills/unity-netcode-design/SKILL.md (or your agent's skills folder). This skill also uses 8 other files; get the full folder from GitHub.- name
- unity-netcode-design
- description
- Source-anchored design rules for Netcode for GameObjects 2.x
Before calling any skill in this module: if you are about to call a skill with parameters guessed from its name or description, STOP — read this file (or fetch its schema via
GET /skills/recommend?includeSchema=true) first. If you already have the parameter definitions from recommend/schema, you may proceed straight to dryRun.
Triggers
- Writing or reviewing multiplayer code
- Designing server/distributed authority
- Wiring RPCs or NetworkVariables
- Debugging netcode
- 编写或审查多人联机代码、设计服务器/分布式权威、连接 RPC 或网络变量、排查 netcode 问题
Netcode for GameObjects - Design Rules
Advisory module. Every rule is distilled from com.unity.netcode.gameobjects 2.x source. Each rule cites a concrete file/line so the reasoning is auditable.
Mode: Documentation only — no REST skills to gate; load freely under any operating mode (Approval / Auto / Bypass).
When to Load This Module
Load before writing or reviewing any of:
- NetworkBehaviour scripts (OnNetworkSpawn / OnNetworkDespawn / RPCs / NetworkVariables)
- NetworkManager startup / shutdown / scene switching
- NetworkObject Spawn / Despawn / ChangeOwnership / TrySetParent
- UnityTransport configuration (direct connect / Relay)
- Any code that branches on IsHost / IsServer / IsClient / IsOwner
Critical Rule Summary (memorize even if you skip the sub-docs)
| # | Rule | Source anchor |
|---|---|---|
| 1 | Spawn() / Despawn() must be called on Server/Host only; client-side calls fail. | Runtime/Core/NetworkObject.cs:1884, 1921 |
| 2 | OnNetworkSpawn() runs before Unity Start() and after Awake/OnEnable. | Runtime/Core/NetworkBehaviour.cs:704 + InvokeBehaviourNetworkSpawn callers |
| 3 | Legacy [ServerRpc] method names must end with ServerRpc; [ClientRpc] must end with ClientRpc (ILPP enforced at compile time). | Editor/CodeGen/ ILPP validators |
| 4 | New [Rpc(SendTo.X)] has no naming constraint; SendTo has 11 values. | Runtime/Messaging/RpcTargets/RpcTarget.cs:9-80 |
| 5 | PlayerPrefab must exist in NetworkPrefabsList or NetworkConfig.Prefabs or 2.x runtime rejects it. | Runtime/Configuration/NetworkConfig.cs:40 + NetworkPrefabsList.cs:14 |
| 6 | Nested NetworkObjects are forbidden (NetworkObject inside another NetworkObject prefab). Re-parent at runtime via TrySetParent. | Runtime/Core/NetworkObject.cs:2135-2215 |
| 7 | NetworkVariable<T> requires T to be unmanaged or implement INetworkSerializable. string, List<>, class are rejected. | Runtime/NetworkVariable/NetworkVariable.cs:12 + ILPP |
| 8 | NetworkList<T> requires T: unmanaged, IEquatable<T>. It is NOT NetworkVariable<List<T>>. | Runtime/NetworkVariable/Collections/NetworkList.cs:14 |
| 9 | NetworkSceneManager.LoadScene/UnloadScene is Server-only. | Runtime/SceneManagement/NetworkSceneManager.cs:1496, 1252 |
| 10 | UnityTransport.SetRelayServerData and SetConnectionData are mutually exclusive; use one or the other. | Runtime/Transports/UTP/UnityTransport.cs:776-897 |
Show full SKILL.md (115 more words)Show less
Sub-doc Routing
| Sub-doc | When to read |
|---|---|
| LIFECYCLE.md | Lifecycle, callback ordering, Awake/OnNetworkSpawn/Start differences |
| OWNERSHIP.md | IsOwner/IsServer/IsHost permission matrix, ChangeOwnership, Distributed Authority |
| RPC.md | Choosing RPC attributes, SendTo semantics, RpcInvokePermission, deprecated paths |
| VARIABLES.md | NetworkVariable/NetworkList init and serialization constraints |
| SPAWNING.md | Prefab registration → Spawn → Despawn, GlobalObjectIdHash, SpawnAsPlayerObject |
| SCENE.md | NetworkSceneManager, EnableSceneManagement, in-scene object sync |
| TRANSPORT.md | UnityTransport direct / Relay / DebugSimulator configuration |
| PITFALLS.md | 30 concrete hallucination pitfalls |
Routing to Other Modules
- Generating NetworkBehaviour scripts → use the functional
netcodemodule'snetcode_add_network_behaviour_script - Bulk attaching NetworkObject/NetworkTransform in the scene →
netcodemodule Components skills - Architecture-level decisions (Server-authoritative vs Distributed Authority) → also load architecture
Version Scope
This document targets com.unity.netcode.gameobjects 2.x (validated against 2.11.0, Unity 6000.0+). Some APIs (SendTo.Authority, RpcInvokePermission, the universal [Rpc] attribute) do not exist in 1.x.
© Besty0728, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 8 other files in SkillsForUnity/unity-skills~/skills/netcode-design of Besty0728/Unity-Skills.
- SKILL.md
- LIFECYCLE.md
- OWNERSHIP.md
- PITFALLS.md
- RPC.md
- SCENE.md
- SPAWNING.md
- TRANSPORT.md
- VARIABLES.md
Open the folder on GitHubat commit 12a40e4
Compare with similar skills
Unity Netcode Design 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 |
|---|---|---|---|---|---|---|
| Unity Netcode Design this skillBesty0728/Unity-Skills | 1.8k | — | ~1.2k | Automated safety check: Pass | 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 | |
| Portal Connectgosuda/portal-tunnel | 272 | — | ~2.9k | Automated safety check: Pass | MIT | |
| Kenshi Manual Freeplay Sessionnhoral/KenshiCoop | 283 | — | ~835 | Automated safety check: Pass | AGPL-3.0 | |
| Dota2 Game LogicXavierCHN/x-template | 216 | — | ~2.7k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Unity Netcode Design
What does Unity Netcode Design do?
Source-anchored design rules for Netcode for GameObjects 2.x. Unity Netcode Design is an agent skill from Besty0728/Unity-Skills.
When should I use Unity Netcode Design?
Unity Netcode Design fits situations like: tasks that involve Multiplayer and networking.
How do I install Unity Netcode Design in Claude Code?
Run `npx skills add Besty0728/Unity-Skills --skill unity-netcode-design -a claude-code`. Or copy the skill folder (SkillsForUnity/unity-skills~/skills/netcode-design in Besty0728/Unity-Skills) into .claude/skills/unity-netcode-design in your project. Claude Code loads it when a task matches its description.
How do I install Unity Netcode Design in Codex?
Run `npx skills add Besty0728/Unity-Skills --skill unity-netcode-design -a codex`. Or copy the skill folder (SkillsForUnity/unity-skills~/skills/netcode-design in Besty0728/Unity-Skills) into .agents/skills/unity-netcode-design in your project. Codex loads it when a task matches its description.
Can I use Unity Netcode Design 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 Besty0728/Unity-Skills --skill unity-netcode-design -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/unity-netcode-design, .gemini/skills/unity-netcode-design, .github/skills/unity-netcode-design and .opencode/skills/unity-netcode-design in your project.
What does Unity Netcode Design need to run?
SKILL.md names no scripts, command-line tools or credentials: Unity Netcode Design is instructions for the agent only.
Does Unity Netcode Design 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 Unity Netcode Design 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 Unity Netcode Design use?
Unity Netcode Design 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 Unity Netcode Design use?
About 1.2k tokens (SKILL.md is roughly 4.7k 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 Unity Netcode Design?
Skills that share tags, products or a category with Unity Netcode Design: Fantasy Framework Development Guide (qq362946/Fantasy, 1.4k stars), Validate Gsdk (PlayFab/gsdk, 170 stars), Portal Connect (gosuda/portal-tunnel, 272 stars) and Kenshi Manual Freeplay Session (nhoral/KenshiCoop, 283 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Unity Netcode Design?
Besty0728 (a GitHub user) maintains it in Besty0728/Unity-Skills, which has 1,814 GitHub stars. The repository holds 82 skills in this directory. The repository was last updated on October 6, 2026.
Source: Besty0728/Unity-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.