excalidraw-mcp-obsidian
MCP server enabling AI assistants to create and edit Excalidraw diagrams as Obsidian-native .excalidraw.md files, with style presets, batch element creation, arrow binding, and an Obsidian selection bridge for localized edits.
README
excalidraw-mcp-obsidian
让 AI 编程助手直接写出可在 Obsidian 里打开、拖拽编辑的 Excalidraw 图——不依赖浏览器画布,也不把图锁在云端编辑器里。
本仓库是 yctimlin/mcp_excalidraw 的 MCP-only 分叉:去掉长期维护的 browser canvas / REST / WebSocket,专注 stdio MCP + Obsidian 文件桥。
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这是什么 / 不是什么
| 本仓库 | 常见替代 | |
|---|---|---|
| 产物 | 本地 .excalidraw.md(Obsidian 原生格式) |
聊天里一张图 / PNG 链接 |
| 运行方式 | Node stdio MCP,按需拉起 | 常驻浏览器画布 + WebSocket |
| 改图 | describe_scene + update_element;可选 Obsidian 选中桥 |
截图闭环 / 整图重生成 |
| 风格 | preset + guide + checklist,令牌查表上色 | 各 SaaS 自带渲染器 |
不做:Mermaid DOM 转换、画布截图 MCP、REST API、内嵌 Claude(P6)。ListTools 已隐藏的废 tool 若被误调会返回说明文案。
5 分钟安装
环境
- Node.js ≥ 18
- Obsidian + Obsidian Excalidraw 插件(用于打开导出文件)
克隆与构建
git clone https://github.com/zzmkxd/excalidraw-mcp-obsidian.git
cd excalidraw-mcp-obsidian
npm ci
npm run build
环境变量
| 变量 | 说明 |
|---|---|
EXCALIDRAW_EXPORT_DIR |
必填。导出路径必须落在此目录下(沙箱)。例:E:/Notes 或 /home/you/vault-parent |
NODE_DISABLE_COLORS |
建议 1,避免 ANSI 污染 MCP JSON |
NO_COLOR |
建议 1 |
配置 MCP 客户端
Cursor(项目或全局 .cursor/mcp.json):
{
"mcpServers": {
"excalidraw-obsidian": {
"type": "stdio",
"command": "node",
"args": ["/绝对路径/excalidraw-mcp-obsidian/dist/index.js"],
"env": {
"EXCALIDRAW_EXPORT_DIR": "/你的/导出父目录",
"NODE_DISABLE_COLORS": "1",
"NO_COLOR": "1"
}
}
}
}
Claude Desktop(claude_desktop_config.json)结构相同,键名放在 mcpServers 下即可。
改源码后须 npm run build,并重启客户端或新开 Agent 会话才会加载新 dist/。
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第一次出图(推荐流程)
在 Agent 里用自然语言描述图即可;底层建议顺序如下。
1. 读设计指南
read_diagram_guide(template="architecture-diagram")
# 或 flowchart / sequence-diagram / er-diagram 等
2. 应用风格预设并查色
apply_style_preset(name="clean-tech")
lookup_style_tokens(roles=["node:accent", "surface:mid", "arrow:muted"])
API 需要 hex;勿随机写颜色,用 preset 令牌。
3. 批量建形状(文字写在形状上)
batch_create_elements(elements=[
{ "id": "svc-a", "type": "rectangle", "x": 100, "y": 80, "width": 160, "height": 56,
"text": "服务 A", "backgroundColor": "#...", "strokeColor": "#..." },
...
])
形状上的 text 会生成 bound text,无需再拆「形状 + 独立文本」三阶段。
4. 绑定箭头
bind_arrows(arrows=[
{ "startElementId": "svc-a", "endElementId": "svc-b", "text": "HTTP" }
])
同节点对多条箭头会自动 gap 错开(STAGGER=10);可显式写 gap / snap 覆盖。
5. 导出到 Obsidian
export_to_obsidian(
filePath="你的库相对路径/某文件夹/demo.excalidraw.md"
)
路径必须在 EXCALIDRAW_EXPORT_DIR 之下。在 Obsidian 中打开该文件做最终观感验收。
read_diagram_guide → apply_style_preset → lookup_style_tokens
→ batch_create_elements → bind_arrows → export_to_obsidian → Obsidian 目视
改图与局部编辑
全图定位
describe_scene— 结构化场景描述(含 preset / checklist 提示)query_elements/get_element— 按 ID 查询
Obsidian 选中桥(进阶)
- 将
scripts/obsidian/AI Edit Selected.md拷入 Obsidian Excalidraw Scripts,设热键(建议 Ctrl+Alt+E) - 在图中多选元素 → 运行脚本 → 查看 chip 梗概 → 确认传入
- 写入 vault 内
暂存/.../.ai-selection.json(路径随你的库结构配置) - Agent:
get_selection→(有filePath时)import_from_obsidian→update_element
超过 30 分钟会标 STALE;Modal 可「清除传入」清磁盘桥接文件。
<!-- 截图占位:docs/images/ai-edit-selected.png -->
MCP 工具一览(31 个)
| 类别 | 工具 |
|---|---|
| 创建 | create_element, batch_create_elements, bind_arrows |
| 读写 | get_element, query_elements, update_element, delete_element, describe_scene, get_element_context |
| 布局 | align_elements, distribute_elements, group_elements, ungroup_elements, lock_elements, unlock_elements, duplicate_elements |
| 场景 | clear_canvas, snapshot_scene, restore_snapshot, get_resource |
| 导入导出 | export_scene, import_scene, export_to_obsidian, import_from_obsidian, export_to_excalidraw_url |
| 风格 / 指南 | read_diagram_guide, list_style_presets, apply_style_preset, lookup_style_tokens, set_canvas_font |
| Obsidian | get_selection |
未在 ListTools 展示(MCP-only 不可用):create_from_mermaid, export_to_image, get_canvas_screenshot, set_viewport。
开发与验收
npm test # 单元测试
npm run smoke:all # 简化结构 QA(导出暂存 + 校验)
npm run soak:faithful # 模板忠实压测(surface / 生命线 / 激活条)
npm run soak:vault # 语义主题压测
npm run type-check
smoke:all 需要可写的 EXCALIDRAW_EXPORT_DIR;本地开发请指向你的测试目录。
目录结构
src/
index.ts # MCP stdio 入口
tools/handlers/ # 每个 tool 一个 handler
templates/ # 图类型指南与 JSON preset
utils/ # 元素转换、箭头、Obsidian 桥接等
scripts/
obsidian/ # Obsidian EA 脚本(选中桥)
dist/ # 构建产物(npm run build)
致谢与许可
- 上游:yctimlin/mcp_excalidraw(MIT)
- 官方聊天小部件:excalidraw/excalidraw-mcp(不同定位:对话内一次性出图)
- Excalidraw 手绘风格画布
截图贡献
欢迎 PR 补充 docs/images/ 教学截图,见 docs/images/README.md。
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