Seed 2.1 Powers a Natural-Language Architecture Diagram Tool
Developer Vincent-chk built and open-sourced Stack Diagram Ark, a webpage that turns a plain-language system description into an engineering-style architecture diagram with product logos. The developer says Volcano Ark Seed 2.1 extracts nodes, groups, and connections, while deterministic code handles coordinates, orthogonal routing, icon assembly, and Playwright-based rendering checks. In the developer's self-reported test of 20 scenarios, all produced diagrams, 19 passed zero-overlap checks, and average generation time was 10.6 seconds, though dense layouts and long edge labels still presented challenges.
The project offers a concrete division of labor between an LLM for semantic extraction and testable code for precise layout, while also disclosing measurable failure rates and layout limits.
想让外行看懂「我的服务用了什么」，最快的方式是给一张架构图。但会画架构图的人不多：画图工具要拖框连线，AI 生图出来的又是插画，不是工程图。我做了一个网页来填这个空缺——粘贴一句大白话，下载一张带各产品官方 logo 的工程制图风架构图。
比如对着它说「我开了个网店，用扣子做客服机器人，聊天记录存飞书」，几秒后得到的就是下面这张：
扣子、豆包、飞书都被画成带官方 logo 的节点，实线是主链路、虚线是定时任务，箭头没有压到任何一个字。操作界面就是最普通的网页：
#Stack Diagram Ark#Seed 2.1#Volcano Ark#Playwright#Coze#Doubao#Feishu#Volcano Engine