antu — Claude Code MCP server: legal diagrams from JSON
Turns a single JSON document into a self-contained HTML page with a legal diagram. Useful when case materials have to reach a court or the other side.
claude mcp add antu -- npx -y @zh-xx/antuWhat antu does
Antu reads a JSON document and draws one HTML page holding a legal diagram. That page stands on its own: no network calls, no server, opens offline, and you can print it or send it as an attachment. An agent reads the case materials and writes the JSON; the engine draws from it. Feed the same JSON twice and you get the same picture.
Four kinds of legal content are covered: relationships, facts, procedure and justification. Relationships come in seven renderings — graph, focus view, relation matrix, equity tree, authority chart, related-party list, relation path. Facts get a timeline, a chronicle or a time scale. Procedure gets a flowchart or a route map. Justification gets a reasoning tree and is marked experimental. A selector on the page flips between renderings; the JSON itself does not pick one. Themes: document (black and white, square, meant for print and filing, the default), modern, legal and dark.
This is version 0.x, and the relationship and justification schemas are still drafts. Every fact in the JSON names the document, the page and the provision behind it, which is what lets the diagram be reproduced later. The materials themselves are neither bundled into the page nor linked from it. Interface language is set with ?lang=en or ?lang=zh; case content is never translated.
What it helps with
- map the parties and their legal relationships from case files
- put a chronology of events on one page
- draw a procedural flowchart with its branches
- record the source of each fact — document, page, provision
- produce a diagram that can be printed and filed
Example prompts for the agent
- Read the case materials and build the JSON for a relationship diagram of the parties
- Turn this document into an Antu fact timeline
- Draw the procedure flowchart from this JSON
How to install antu
Platform CLI
claude mcp add antu -- npx -y @zh-xx/antuPlatform CLI
codex mcp add antu -- npx -y @zh-xx/antuConfig file
{
"mcpServers": {
"antu": {
"command": "npx",
"args": [
"-y",
"@zh-xx/antu"
]
}
}
}Config file
{
"servers": {
"antu": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@zh-xx/antu"
]
}
}
}Platform CLI
gemini mcp add antu npx -y @zh-xx/antuStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about antu
How do I install antu in Claude Code?
With one command: claude mcp add antu -- npx -y @zh-xx/antu.
What does antu do?
It builds a legal diagram — relationships, facts, procedure or justification — from one JSON document and returns it as a self-contained HTML page that makes no network requests.
Do I need a server or an internet connection to view the diagram?
No. The page opens offline, and you can archive it, print it or send it as an attachment.
