Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add znlgis/opengis-skills --skill opencsg-netgit clone --depth 1 https://github.com/znlgis/opengis-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/znlgis/opengis-skills/opencsg-net)<a href="https://agentmods.dev/skills/znlgis/opengis-skills/opencsg-net"><img src="https://agentmods.dev/badge/skills/znlgis/opengis-skills/opencsg-net/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/znlgis/opengis-skills/opencsg-net"><img src="https://agentmods.dev/badge/skills/znlgis/opengis-skills/opencsg-net.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00082 | $0.04347 |
| Opus 5.5 | $0.00033 | $0.01739 |
| Sonnet 5.5 | $0.00016 | $0.00869 |
| Haiku 4.5 | $0.00008 | $0.00435 |
Grade A, and why
opencsg-net scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 319 lines — stays where its author put it; the contents beside it link to each section on GitHub.
项目地址： https://github.com/znlgis/OpenCSG.NET
NuGet： https://www.nuget.org/packages/OpenCSG.NET
许可证： MIT ｜ 最新版本：
1.4.0（GitHub tagv1.4.0与 NuGet 一致；csproj 里<Version>0.0.0</Version>只是占位，版本由 CI 在打包时注入）
概述
OpenCSG.NET 是一个面向 .NET 的 构造实体几何（CSG）建模库。提供基础形体（立方体、球体、圆柱体、圆锥、拉伸体、楔形体）、布尔运算（并集、差集、交集）、型钢截面库、声明式 CSG 树（含 JSON 序列化）、STL 导出，以及把实体投影成三视图的制图能力。netstandard2.0，MIT 授权。
核心特性
| 特性 | 说明 |
|---|---|
| 依赖 | 唯一 PackageReference 是 System.Text.Json 8.0.6（供 CSG 树 JSON 序列化用），其余无外部依赖 |
| 跨平台 | netstandard2.0；测试/样例/性能工程为 net8.0 |
| CSG 布尔运算 | Union / Subtract / Intersect（params 支持一次传多个） |
| 基础形体 | Cube / Sphere / Cylinder / Cone / Extrude / Wedge |
| 变换 | Translate / RotateX-Y-Z / Scale / Transform（Matrix4x4） |
| 声明式 CSG 树 | CsgNode 记录类型 + CsgNodes 工厂 + CsgEvaluator.Evaluate + CsgSerialization JSON 往返 |
| 型钢截面 | Profiles：Rectangle / HBeam / Channel / SquareTube / Trapezoid / Capsule / LShape |
| STL 导出 | Solid.WriteStl（TextWriter / BinaryWriter）与 StlWriter.WriteAscii/WriteBinary(path) |
| 三视图投影 | ViewProjector + ViewDirections（主/俯/左）+ ViewArcFitter（投影线段的圆弧识别） |
| BSP 树 | 迭代式 BSP 树实现（非递归），不会栈溢出 |
上游关系
OpenJsCad csg.js (JavaScript)
└── praeclarum/Csg (手工 C# 移植)
└── hypar-io/Csg
├── Csg (Union 原点居中修复、NaN 校验)
└── DotNetCsg (二进制 STL、迭代 BSP、RotateX/Y/Z)
└── OpenCSG.NET (本项目 — 合并两者改进)
环境准备
安装
dotnet add package OpenCSG.NET
前置条件
- .NET Standard 2.0+（库本身）
- .NET 8+（构建/测试/示例）
- 构建整个解决方案需要 .NET 9+ SDK：
dotnet build OpenCSG.NET.slnx - 数值口径：布尔运算按 绝对容差 1e-5 合并顶点/平面，坐标量级到 1e6 仍然正确（仓库有测量坐标回归测试）
精度与网格约定（官方 README 固化）
- 布尔结果可能出现 T 顶点接缝（没有 T 顶点清理 pass）：面没有面积洞（按体积累等式
A ∪ B = A + B − A ∩ B验证过），但不保证是严格闭合的二维流形 - 负缩放（镜像）矩阵会按行列式识别并翻转顶点缠绕与平面法线，镜像体仍朝外
核心 API
基础形体
using Csg;
using static Csg.Solids;
// 立方体
var cube = Cube(size: 2, center: true);
var cube2 = Cube(width: 3, height: 2, depth: 1); // 三边尺寸
var cube3 = Cube(new Vector3D(3, 2, 1), center: false); // 或按向量给尺寸
// 球体
var sphere = Sphere(r: 1, center: true);
// 圆柱体
var cylinder = Cylinder(r: 0.5, h: 3, center: true);
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 13d ago Changed · +100 lines 6982f341459c
- 1mo ago Changed 920840bdbb4b
- 1mo ago Changed 43da62d80402
- 1mo ago First seen · 219 lines · 82 tokens per session scan A 493be7b29726
opencsg-net is a skill published in the GitHub repository znlgis/opengis-skills (75 stars, last pushed today), licensed MIT. It adds 82 tokens to every session and 4,347 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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