Agent skill

Unreal Modeling Primitives

by Italink in Italink/UnrealClientProtocol

GeometryScript 图元创建与建模函数。当用户要求创建 Box、Sphere、Cylinder 等基础形状,或进行拉伸、旋转体、壳体等建模操作时使用。

MITAuto-check passedGame Development

Install Unreal Modeling Primitives

skills CLI
$ npx skills add Italink/UnrealClientProtocol --skill unreal-modeling-primitives -a claude-code

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

GitHub CLI
$ gh skill install Italink/UnrealClientProtocol unreal-modeling-primitives --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/Italink/UnrealClientProtocol.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Skills/unreal-modeling-primitives .claude/skills/unreal-modeling-primitives && 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/

Facts

Skill name
unreal-modeling-primitives
GitHub stars
127
Token cost
~1.7k tokens
SKILL.md length
392 words
Files
1
Skills in repo
24
Repo updated
First seen
Licence
MIT

At a glance

GeometryScript 图元创建与建模函数。当用户要求创建 Box、Sphere、Cylinder 等基础形状,或进行拉伸、旋转体、壳体等建模操作时使用。

  • Tasks that involve Game development
  • SKILL.md covers 库, MeshPrimitiveFunctions — 主要函数, MeshModelingFunctions — 主要函数 and 结构体与枚举, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Unreal Modeling Primitives is an agent skill from Italink/UnrealClientProtocol. GeometryScript 图元创建与建模函数。当用户要求创建 Box、Sphere、Cylinder 等基础形状,或进行拉伸、旋转体、壳体等建模操作时使用。

Its SKILL.md is about 1.7k 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. The repository describes itself as: Lightweight UE5 plugin that exposes Unreal Engine's reflection system over TCP+JSON — let AI agents call UFunctions, read/write UProperties, and inspect any UObject in a running… The licence is MIT.

When your agent uses it

  • Tasks that involve Game development

Example prompts

  • “/unreal-modeling-primitives”

What it can do on your machine

Read from SKILL.md and the folder at commit 7f0a56e. 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 (its code samples are json).

    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

Unreal Modeling Primitives loads about 1.7k tokens when it runs. Until then it costs about 27 tokens; SKILL.md has 392 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~27
When it runs · the whole SKILL.md, loaded when a task matches
~1.7k

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 Italink/UnrealClientProtocol at commit 7f0a56e, republished under its MIT licence (© Italink). 392 words, ~1,722 tokens.

Download SKILL.mdSave it as .claude/skills/unreal-modeling-primitives/SKILL.md (or your agent's skills folder).
name
unreal-modeling-primitives
description
GeometryScript 图元创建与建模函数。当用户要求创建 Box、Sphere、Cylinder 等基础形状,或进行拉伸、旋转体、壳体等建模操作时使用。

建模 — 图元与建模

前置条件:先阅读 unreal-modeling。

库

库CDO
图元/Script/GeometryScriptingCore.Default__GeometryScriptLibrary_MeshPrimitiveFunctions
建模/Script/GeometryScriptingCore.Default__GeometryScriptLibrary_MeshModelingFunctions

TargetMesh 为 UDynamicMesh* 路径字符串。Debug 省略。

MeshPrimitiveFunctions — 主要函数

函数关键参数说明
AppendBoxPrimitiveOptions, DimensionX/Y/Z, StepsX/Y/Z追加长方体
AppendSpherePrimitiveOptions, Radius, StepsX, StepsY追加球体(经纬细分)
AppendSphereBoxPrimitiveOptions, Radius, Steps, Subdivisions追加球体(立方体映射细分)
AppendCylinderPrimitiveOptions, Radius, Height, RadialSteps, HeightSteps, bCapped追加圆柱
AppendCapsulePrimitiveOptions, Radius, LineLength, HemisphereSteps, CircleSteps追加胶囊体
AppendConePrimitiveOptions, BaseRadius, TopRadius, Height, RadialSteps, HeightSteps, bCapped追加圆锥/圆台
AppendTorusPrimitiveOptions, InnerRadius, OuterRadius, CrossSectionSteps, CircleSteps追加环面
AppendDiscPrimitiveOptions, Radius, AngleSteps, SpokeSteps, StartAngle, EndAngle, HoleRadius追加圆盘/扇形
AppendRectangleXYPrimitiveOptions, DimensionX, DimensionY, StepsWidth, StepsHeight追加 XY 平面矩形
AppendRoundRectangleXYPrimitiveOptions, DimensionX, DimensionY, CornerRadius, StepsWidth, StepsHeight, RoundSteps追加圆角矩形
AppendLinearStaircasePrimitiveOptions, StepWidth, StepHeight, StepDepth, NumSteps, bFloating追加楼梯
AppendSpiralStaircasePrimitiveOptions, StepWidth, StepHeight, InnerRadius, SpiralAngle, NumSteps, bFloating追加螺旋楼梯
AppendSweepPolylinePrimitiveOptions, PolylineVertices(FVector2D 数组), SweepPath, bLoop, StartScale/EndScale沿路径扫掠多段线截面
AppendSweepPolygonPrimitiveOptions, PolygonVertices, SweepPath, bLoop, bCapped, StartScale/EndScale沿路径扫掠多边形截面
AppendSimpleSweptPolygonPrimitiveOptions, PolygonVertices, SweepPath, bLoop, bCapped, StartScale/EndScale简化版扫掠
AppendRevolvePolygonPrimitiveOptions, PolygonVertices, RevolutionOptions旋转体(绕轴旋转多边形截面)
AppendSimpleExtrudePolygonPrimitiveOptions, PolygonVertices, Height, HeightSteps, bCapped简单拉伸多边形
AppendVoronoiDiagram2DPrimitiveOptions, VoronoiSites(FVector2D 数组), Bounds, BoundsExpand追加 2D Voronoi 图
AppendDelaunayTriangulation2DPrimitiveOptions, Vertices(FVector2D 数组), ConstrainedEdges追加 Delaunay 三角化
AppendBoundingBoxTargetMesh, Box, PrimitiveOptions追加包围盒 mesh

注意:AppendSweepPolygon、AppendRevolvePolygon、AppendSimpleExtrudePolygon 的 PolygonVertices 参数类型为 FGeometryScriptSimplePolygon,需要用 MeshOperationLibrary.MakeSimplePolygon 桥接。SweepPath 参数类型为 FGeometryScriptPolyPath,需要用 MakePolyPath 桥接。

MeshModelingFunctions — 主要函数

函数关键参数说明
ApplyMeshOffsetTargetMesh, Options整体偏移(膨胀/收缩)
ApplyMeshShellTargetMesh, Options生成壳体(双面偏移)
ApplyMeshLinearExtrudeFacesTargetMesh, Options, Selection沿法线线性拉伸选中面
ApplyMeshOffsetFacesTargetMesh, Options, Selection偏移选中面
ApplyMeshInsetOutsetFacesTargetMesh, Options, Selection内缩/外扩选中面
ApplyMeshBevelSelectionTargetMesh, Options, Selection倒角选中区域
ApplyMeshPolygroupBevelTargetMesh, Options, GroupLayer按 Polygroup 边界倒角
ApplyMeshDisconnectFacesTargetMesh, Selection断开选中面(使其成为独立岛)
ApplyMeshDuplicateFacesTargetMesh, Selection复制选中面

结构体与枚举

Show full SKILL.md (159 more words)Show less
FGeometryScriptPrimitiveOptions
字段类型默认值说明
PolygroupModeEGeometryScriptPrimitivePolygroupModePerFacePolygroup 分组方式
bFlipOrientationboolfalse翻转法线方向
UVModeEGeometryScriptPrimitiveUVModeUniformUV 生成模式
EGeometryScriptPrimitivePolygroupMode
值说明
PerFace每个面一个 Polygroup
PerQuad每个四边形一个 Polygroup
PerShape整个形状一个 Polygroup
SingleGroup所有图元共享一个 Polygroup
EGeometryScriptPrimitiveUVMode
值说明
Uniform均匀 UV
ScaleToFill缩放填满 0-1
FGeometryScriptRevolveOptions(用于 AppendRevolvePolygon)
字段类型默认值说明
RevolveDegreesfloat360旋转角度
DegreeOffsetfloat0起始角度偏移
Stepsint24旋转步数
bReverseDirectionboolfalse反向旋转
bHardNormalsboolfalse硬边法线
HardNormalAnglefloat0硬边角度阈值
bProfileAtMidpointboolfalse截面在步数中点
bFillPartialRevolveEndcapsbooltrue非 360° 时封口
FGeometryScriptMeshOffsetOptions(用于 ApplyMeshOffset)
字段类型默认值说明
OffsetDistancefloat1.0偏移距离
bFixedBoundaryboolfalse固定边界
Iterationsint0平滑迭代次数
SolveStepsint0求解步数
SmoothAlphafloat0.1平滑系数
bReprojectSmoothboolfalse平滑后重投影
BoundaryAlignmentWeightfloat10.0边界对齐权重
FGeometryScriptMeshLinearExtrudeOptions(用于 ApplyMeshLinearExtrudeFaces)
字段类型默认值说明
Distancefloat1.0拉伸距离
DirectionEGeometryScriptLinearExtrudeDirectionFaceNormal拉伸方向
DirectionVectorFVector(0,0,1)自定义方向(当 Direction=Fixed 时)
bSingleDirectionbooltrue单向拉伸
EGeometryScriptLinearExtrudeDirection
值说明
FaceNormal沿面法线
SingleDirection沿固定方向

JSON 示例

追加球体:

json
{"object":"/Script/GeometryScriptingCore.Default__GeometryScriptLibrary_MeshPrimitiveFunctions","function":"AppendSphere","params":{"TargetMesh":"/Engine/Transient.DynamicMesh_0","PrimitiveOptions":{"PolygroupMode":"PerFace","bFlipOrientation":false,"UVMode":"Uniform"},"Radius":50,"StepsX":16,"StepsY":16}}

追加圆柱:

json
{"object":"/Script/GeometryScriptingCore.Default__GeometryScriptLibrary_MeshPrimitiveFunctions","function":"AppendCylinder","params":{"TargetMesh":"/Engine/Transient.DynamicMesh_0","PrimitiveOptions":{},"Radius":25,"Height":100,"RadialSteps":16,"HeightSteps":1,"bCapped":true}}

偏移(膨胀):

json
{"object":"/Script/GeometryScriptingCore.Default__GeometryScriptLibrary_MeshModelingFunctions","function":"ApplyMeshOffset","params":{"TargetMesh":"/Engine/Transient.DynamicMesh_0","Options":{"OffsetDistance":5.0,"bFixedBoundary":false,"Iterations":3}}}

发现

对上述 CDO 路径调用 DescribeObject 可查看当前引擎版本的完整函数列表和参数签名。

© Italink, 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/unreal-modeling-primitives of Italink/UnrealClientProtocol.

Open the folder on GitHubat commit 7f0a56e

Compare with similar skills

Unreal Modeling Primitives 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.

Unreal Modeling Primitives compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Unreal Modeling Primitives this skillItalink/UnrealClientProtocol127—~1.7kAutomated safety check: PassMIT
Godot Gdscript Patterns925236118/AlphaAgent10310 repos~5kAutomated safety check: PassMIT
Sprite Genaldegad/sprite-gen2.7k—~4.9kAutomated safety check: PassApache-2.0
2D Map and Scene Generator0x0funky/agent-sprite-forge4.4k—~2.9kAutomated safety check: PassMIT
Fantasy Framework Development Guideqq362946/Fantasy1.4k—~5.8kAutomated safety check: PassCustom licence
Dev StoryDonchitos/Claude-Code-Game-Studios26k—~2.4kAutomated safety check: NotesMIT

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Questions about Unreal Modeling Primitives

What does Unreal Modeling Primitives do?

GeometryScript 图元创建与建模函数。当用户要求创建 Box、Sphere、Cylinder 等基础形状,或进行拉伸、旋转体、壳体等建模操作时使用。. Unreal Modeling Primitives is an agent skill from Italink/UnrealClientProtocol.

When should I use Unreal Modeling Primitives?

Unreal Modeling Primitives fits situations like: tasks that involve Game development.

How do I install Unreal Modeling Primitives in Claude Code?

Run `npx skills add Italink/UnrealClientProtocol --skill unreal-modeling-primitives -a claude-code`. Or copy the skill folder (Skills/unreal-modeling-primitives in Italink/UnrealClientProtocol) into .claude/skills/unreal-modeling-primitives in your project. Claude Code loads it when a task matches its description.

How do I install Unreal Modeling Primitives in Codex?

Run `npx skills add Italink/UnrealClientProtocol --skill unreal-modeling-primitives -a codex`. Or copy the skill folder (Skills/unreal-modeling-primitives in Italink/UnrealClientProtocol) into .agents/skills/unreal-modeling-primitives in your project. Codex loads it when a task matches its description.

Can I use Unreal Modeling Primitives 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 Italink/UnrealClientProtocol --skill unreal-modeling-primitives -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/unreal-modeling-primitives, .gemini/skills/unreal-modeling-primitives, .github/skills/unreal-modeling-primitives and .opencode/skills/unreal-modeling-primitives in your project.

What does Unreal Modeling Primitives need to run?

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

Does Unreal Modeling Primitives 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 Unreal Modeling Primitives 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 Unreal Modeling Primitives use?

Unreal Modeling Primitives 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 Unreal Modeling Primitives use?

About 1.7k tokens (SKILL.md is roughly 6.9k 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 Unreal Modeling Primitives?

Skills that share tags, products or a category with Unreal Modeling Primitives: Godot Gdscript Patterns (925236118/AlphaAgent, 103 stars), Sprite Gen (aldegad/sprite-gen, 2.7k stars), 2D Map and Scene Generator (0x0funky/agent-sprite-forge, 4.4k stars) and Fantasy Framework Development Guide (qq362946/Fantasy, 1.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Unreal Modeling Primitives?

Italink (a GitHub user) maintains it in Italink/UnrealClientProtocol, which has 127 GitHub stars. The repository holds 24 skills in this directory. The repository was last updated on August 28, 2026.

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