Code Civil

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Arxo Law MCP server for the fr.code_civil/legi slice, local over stdio

автор: arxo-owner

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Описание

Arxo Law MCP server for the fr.code_civil/legi slice, local over stdio

README

Arxo Law

Run a rule. See the answer and why. Replay the result.

Checks npm Arxo on DevHunt

Try in browser · Run locally · Write rules · Publish a package · Install in VS Code · Connect MCP

SDK and CLI packages are available. Engine source is planned.

Run locally

With Node.js 20 or newer:

git clone \
  https://github.com/arxohq/law \
  arxo-law
cd arxo-law
npm ci --ignore-scripts
npm start

Your first rule
  Rule      Adult
  Input     Alice, age 20
  Answer    adult = yes
  Why       Applied Adult
  Missing   unknown (no age fact)
  Replay    identical evaluation bytes

Try npm start -- --age 16. The answer becomes unknown: this model has no rule establishing adulthood below 18. Then edit the rule and run again. Walk through the example →

Modelling on Arxo: public demonstrations

These public model repositories are demonstrations: a small sample of a much larger corpus of models on Arxo, chosen to show what modelling looks like across subjects. They share one language and runtime; each pins its sources, records its cases with their answers and states its scope per package.

Area	Repositories
Constitutions	Japan · Kazakhstan
Civil codes	Code civil · BGB
Tax	US Internal Revenue Code
Treaties and principles	UN Charter · UNIDROIT Principles
Benefits and insurance	French family benefits · German housing benefit · Kazakhstan motor insurance
Game rules	FIDE Laws of Chess
Sciences	OpenStax mechanics · chemistry · biology
Philosophy	Summa Theologiae
Comparison	Catala and Arxo on one regulation

One recorded question from five of them:

Source	One recorded question
FIDE Laws of Chess	Second completed illegal move: loss `COMPUTED / TRUE_ONLY`; with the opponent's inability to checkmate established, draw `COMPUTED / TRUE_ONLY`
OpenStax mechanics	Applied force 80 N against a maximum static friction of 80 N: stays at rest `TRUE_ONLY`; at 90 N, `FALSE_ONLY`
Code civil	A debt from 2000, proceedings in 2015: time-barred `FALSE_ONLY` under the 1804 model, `TRUE_ONLY` under the modern limitation model
Constitution of Japan	Eight votes of all twelve members of a House: Article 96 threshold `TRUE_ONLY`; seven votes, `NEITHER`
Summa Theologiae	Self-defence with an adjudicated proportionality assessment: `TRUE_ONLY`; without it, `REQUIRES_JUDGMENT`

Start with chess in a fresh directory:

npm init -y
npm install --ignore-scripts @arxo/[email protected] @arxo/[email protected]

Save the chess README's example as example.mjs and run node example.mjs. Most other repositories run with the CLI: npm install -g @arxo/cli, clone the repository, then law eval examples/<case> as each README shows. The full list with observation details is in the ecosystem page.

Choose your next step

I want to…	Start here
Run an existing model	French housing-aid formula: input → answer → evidence
Run a published source model	Modelling on Arxo: public demonstrations
Write my own rules	A small .law source, compiler diagnostics and replay
Publish my own package	From rules to a release another project installs by exact version
Work in an editor	Install Arxo Law in VS Code or through Open VSX
Use Python	Published Python SDK and canon packages
Use a model with an assistant	Install a specific MCP slice and verify the connection

How an answer is built

Arxo compiles rules into a model, applies the supplied facts and attaches an explanation and canonical evaluation document. The examples execute locally after installation. Law is the first domain; standards and other rulebooks use the same machinery. A proof explains the selected model's answer.

Packages

Package	Latest	Start with
@arxo/law	0.4.7	Run a model
@arxo/law-engine	0.5.6	Write rules
@arxo/cli	0.2.9	CLI and editor

npm and Python packages → · Editors, installations, browser tools and learning →

Explore and contribute

npm run examples — run all three examples with readable output.
npm --silent start -- --json — inspect the result summary, statuses and full hash.
Example commands and expected results.
Report a problem or ask a question.
Contribution guide · source availability.

Follow Arxo

YouTube · X · Telegram · DEV.to · Medium · Instagram

Community · Books · Writings

arxo.io · Documentation · Apache-2.0

from github.com/arxohq/law

Установить Code Civil в Claude Desktop, Claude Code, Cursor

Рекомендуется · одна команда, все IDE

unyly install code-civil

Ставит в Claude Desktop, Claude Code, Cursor и VS Code — сам разбирается с npx, uvx и сборкой из исходников.

Впервые? Поставь CLI: curl -fsSL https://unyly.org/install | sh

Или настроить вручную

Выполни в терминале:

claude mcp add code-civil -- npx -y @arxo/mcp-code-civil

Пошаговые гайды: как установить Code Civil

Установить Code Civil в Claude Desktop Установить Code Civil в Claude Code Установить Code Civil в Cursor Установить Code Civil в VS Code

FAQ

Code Civil MCP бесплатный?

Да, Code Civil MCP бесплатный — установка в пару кликов через Unyly без оплаты.

Нужен ли API-ключ для Code Civil?

Нет, Code Civil работает без API-ключей и переменных окружения.

Code Civil — hosted или self-hosted?

Self-hosted: сервер запускается локально на твоей машине командой из раздела установки.

Как установить Code Civil в Claude Desktop, Claude Code или Cursor?

Открой Code Civil на unyly.org, выбери вкладку своего клиента (Claude Desktop, Claude Code, Cursor) и нажми Install — конфиг сгенерируется автоматически, без правки JSON.