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Modulor

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Agent-native CAD: draw plans, model 3D, render checks, export DXF/SVG/STL/GLB/IFC, import DXF.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to CursorAdd to VS Code
Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment
Target File:~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "modulor": {
      "command": "npx",
      "args": [
        "-y",
        "modulor"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

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Documentation Overview

Modulor

PyPI CI Python License: MIT OpenSSF Best Practices

Agent-native 的二维绘图 + 三维建模内核。没有 GUI,没有鼠标——JSON 进,几何出。

English: Modulor is an agent-native 2D drafting + 3D modeling kernel — the geometry layer for the agent era. No GUI: the entire tool is a self-describing JSON op protocol (77 ops, contract-tested) over a plain-JSON document format, callable via CLI, JSON-Lines pipe, MCP server or Python. Parametric recipes, architectural semantics, freeform surfaces, DXF/glTF interop, a built-in verification loop (measure / validate / render-and-see), and a conformance checker for the format. Agents read AGENT_GUIDE.md; the API contract lives in docs/API.md; the file format spec in docs/FORMAT.md. Named after Le Corbusier's Modulor — a universal measure for building, this time for machines.

传统 CAD软件 是为人类的眼睛和手设计的:菜单、视口、 捕捉、快捷键。Agent 调用它们时,要么模拟人类操作,要么穿过厚重的插件层。 Modulor 反过来:把 CAD 的几何核心保留下来,把交互层整个换成 Agent 的母语 ——结构化命令、结构化结果、结构化错误,外加一条"渲染成图、亲眼验证"的反馈回路。

Code
                ┌─────────────────────────────────────────┐
   Agent ──────▶│  CLI batch │ CLI pipe │ MCP │ Python API │
                └──────────────────┬──────────────────────┘
                                   ▼
                       JSON 命令(自描述 op 协议)
                                   ▼
                ┌─────────────────────────────────────────┐
                │  几何内核:manifold3d (Clipper2 + Manifold) │
                │  2D/3D 布尔 · 偏移 · 拉伸 · 旋转体 · 切片    │
                └──────────────────┬──────────────────────┘
                                   ▼
        .json 文档 · SVG · DXF · PNG 渲染 · OBJ / STL / GLB

核心能力(77 个自描述操作,接口已冻结于 1.0-rc)

扩展生态:领域能力住扩展包——装上扩展即获得 mech.gear 渐开线齿轮(官方模板); 三十行代码就能写出你自己的扩展,命名空间与 API 法律由机制强制, 见 docs/PLUGINS.md。

身份与治理:项目名/包名/CLI/格式标识已正式冻结; Standard(规格,供第三方实现)与 Core(参考实现,canonical 而非排他)的 边界、semver 与兼容政策、RFC 流程见 GOVERNANCE.md。

标准的两半都已成文并由测试看守:op 协议——docs/API.md (由注册表生成)+ 机器可读契约 docs/api.json,实现与契约 不一致时测试直接失败;文档格式——docs/FORMAT.md 规格

  • docs/document.schema.json(JSON Schema), 每份示例文档都在 CI 里对着 schema 验证。

与主流 CAD 的互操作是契约(docs/INTEROP.md): DXF 导出为 R2000 原生对象(ELLIPSE/SPLINE/HATCH/关联 DIMENSION/ BLOCK+INSERT),在 AutoCAD 里直接可编辑;导入保留块结构;每个导出文件 在 CI 里由 ezdxf(DXF)与 ifcopenshell(IFC4)做语义级校验。

  • 参数化(文档 = 数据 + 配方):任何数值字段接受表达式 ("bay*3"、"level_top('L2')"、"grid_x('B')");recipe_set 把生成 命令存进文档作为设计意图,set_param + regenerate 一条命令全模型 联动重建——"柱距 4m 改 5m,其他保持联动"就是这两个调用

  • 建筑语义:轴网 add_grid(平面出轴线+编号气泡,交点可在表达式中引用)、 标高 add_level、房间 add_room(平面自动标注名称+面积 m²)、 面积报告 program(按名称/标高/类型汇总)、坡屋顶 add_roof(平/单坡/双坡)、 楼梯 add_stair(自动按舒适度公式 2R+T=630 排踏步)、幕墙 add_facade

  • 方案迭代:snapshot / restore 快照,diff 对比两个方案 (参数变更、实体增删改、体积面积增量),recipe 让设计意图跨方案继承

  • 2D 制图:线 / 多段线 / 样条曲线 / 圆 / 弧 / 矩形 / 文字、 对齐·角度·半径标注(自动测量)、圆角 / 倒角、图层、2D 布尔、偏移

  • 建筑墙体:中心线画墙(直线、闭合环、样条曲线墙),门窗洞口按 沿墙距离定位,平面图出双线+开启线,3D 自动成体

  • 3D 建模:体块 / 圆柱 / 球 / 拉伸(扭转、收分)/ 旋转体 / 稳健 3D 布尔(Manifold 内核,不会产生破面)/ 切片 / 平面与立面投影 / 抽壳

  • 自由形态(Agent 的主场):断面放样 loft(纵向样条插值出流动曲面)、 沿空间路径扫掠 sweep、自由变形 deform(扭转/锥化/弯曲)、 隐式曲面 add_implicit(用数学表达式雕塑形体,smin/smax 平滑融合)、 网格平滑 smooth——Zaha 级别的异形语汇,全部走 JSON 命令

  • 变换:移动 / 复制 / 旋转 / 缩放 / 镜像 / 网格与环形阵列,2D/3D 通吃

  • 反馈回路:measure / validate / find 空间查询 / render labels=true 把实体 id 印在图上 / snapshot·restore 文档快照

  • 互通:导出 SVG · DXF · OBJ · STL · GLB(PBR) · IFC4 语义 BIM (墙带真洞口、标高/轴网/房间面积量,Revit/Archicad 直接打开);导入 DXF (LINE/CIRCLE/ARC/POLYLINE 含弧段/TEXT/MTEXT/SPLINE/ELLIPSE + 图层颜色, 不支持的类型计数报告,绝不静默丢弃)——Agent 可以接手人类的存量图纸

  • 渲染:纯 numpy 软件光栅器,平面图 PNG 与 3D 着色 PNG(特征边 + 坐标轴), 多模态 Agent 可直接"看见"自己建的模型——MCP 的 cad_render 直接返回图像

  • 实时查看器:modulor serve 起一个严格只读的浏览器窗口 (2D 平面 + WebGL 3D 轨道视图 + 图层开关 + 一键下载),监视文档文件, 任何 Agent 通过任何通道修改文档,页面自动跟随刷新——人类看,Agent 干

安装

Terminal
pip install modulor          # 内核依赖仅 numpy + manifold3d
pip install modulor[check]   # 可选:格式一致性校验(modulor check --strict)

开发安装:克隆本仓库后 pip install -e .[dev],pytest tests 跑全部测试。

60 秒上手

Code
modulor ops                      # 看所有命令(自描述,无需读文档)
modulor ops add_wall             # 看单个命令的参数/默认值/示例

echo [{"op":"add_box","size":[100,60,40]},{"op":"render","path":"a.png"}] > s.json
modulor run model.json s.json    # 批量执行(原子性:失败则不落盘)

modulor repl model.json          # 长会话:一行 JSON 进,一行 JSON 出
modulor mcp                      # MCP stdio 服务器
modulor serve model.json         # 只读查看器:浏览器实时跟随文档变化

viewer 查看器:左 2D 平面(滚轮缩放/拖拽平移),右 WebGL 3D(轨道相机), 底部图层开关,顶部 SVG/DXF/GLB/STL 下载。零前端依赖,单文件 HTML,离线可用。

MCP 客户端配置(如 Claude Code):

config.json
{"mcpServers": {"modulor": {"command": "modulor", "args": ["mcp"]}}}

接入你的 Agent:integrations/ 提供即插即用包——Claude Code skill、Cursor 规则、Codex AGENTS 片段、OpenAI 兼容工具定义(GPT/Kimi/通义/DeepSeek 直接加载)、LangChain/AutoGen/CrewAI 集成、中文接入说明、以及 8 个 CI 实测的命令配方(COOKBOOK)。

示例

modulor run out\studio.json examples\floorplan.json —— 户型图: 闭合外墙环 + 隔墙 + 4 门窗 + 标注链 + 房间标签 → SVG/DXF/PNG → 一键长成 3D(含楼板)→ GLB。

modulor run out\bracket.json examples\bracket.json —— 机械零件: 偏移做圆角板 + 孔阵列 + 腰形槽(2D 布尔)→ 拉伸 → 凸台镗孔(3D 布尔)→ 体积测量 → STL/GLB/OBJ + 剖面 DXF。

modulor run out\zaha.json examples\zaha.json —— 异形建筑: 三断面样条放样出流线塔楼(loft+twist)+ 飘带天蓬(sweep)+ 样条曲线墙 + 隐式曲面融合展亭(add_implicit smin)→ GLB。

modulor run out\param.json examples\parametric.json --as-recipe —— 参数化建筑:5 个参数驱动轴网/标高/柱阵/楼板/幕墙/坡屋顶/楼梯/房间; 之后 {"op":"regenerate","params":{"bay":5000,"floors":4}} 一条命令, 整栋楼重新协调(OFFICE 面积 76.8m² → 120m²,diff 给出完整对比报告)。

建筑平面(双线墙、门扇、标注链)机械零件(2D/3D 布尔)异形建筑(放样/扫掠/隐式曲面)
floor planbracketfreeform

参数化联动——同一份配方,{"op":"regenerate","params":{"bay":5000,"floors":4}} 一条命令重建整楼:

bay=4000 · 3 层bay=5000 · 4 层(regenerate 之后)
bay 4000bay 5000
城市体块(分区/裙房塔楼/扭转地标)
urban

规模参考(scripts/bench.py,20 层塔楼 401 条命令):构建 0.08s、 文档 0.04MB(墙体参数化存储)、着色渲染 2.2s、GLB 导出 0.05s。

设计原则(Agent-native 的含义)

  1. 命令即 API,API 即文档:每个 op 自带参数 schema、默认值与示例, help 一个调用拿全;参数拼错会收到 "did you mean ..." 。
  2. 一切皆可验证:建完就能 measure、validate、render——Agent 不必 盲信自己的输出。
  3. 原子批处理:批量命令要么全部成功落盘,要么报出第几条错在哪,文档不脏。
  4. 用标签不用坐标 id:布尔运算会消耗实体,tag 让选择器稳定。
  5. 文档就是纯 JSON:可 diff、可入库、可手改,没有二进制黑盒。

项目结构

Code
modulor/
  document.py    文档模型(图层/材质/实体/选择器/序列化)
  engine.py      批处理执行器(原子性、结构化错误)
  geometry.py    向量/仿射/弧离散化/墙体轮廓偏移
  shapes.py      实体 <-> 几何内核(CrossSection/Manifold)桥
  ops/           全部操作:绘图、建模、参数化、建筑语义、变换、查询、导出
  exporters/     SVG · DXF · OBJ · STL · GLB(全部手写,零重依赖)
  render/        软件光栅器、笔画字体、2D/3D 渲染
  cli.py         run / op / repl / ops / new / info / serve / mcp
  mcp_server.py  MCP stdio 服务器(手写 JSON-RPC,无 SDK 依赖)
  viewer/        只读实时查看器(stdlib HTTP + 单文件 HTML + 自写 WebGL)
tests/           行为 + 契约 + 模糊测试(pytest)
examples/        户型图与机械零件全流程脚本
AGENT_GUIDE.md   给 Agent 看的完整使用指南

License

MIT


mcp-name: io.github.bcllcc/modulor

Read the full README →View source on GitHub →

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Frequently Asked Questions about Modulor

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "modulor": { "command": "npx", "args": ["-y", "modulor"] } }

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RuntimeNode.js
Last updatedSep 7, 2026
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