## Project name

ArthurLegal

## Tagline (one line)

Multi-jurisdiction legal AI assistant packages for Claude.ai Projects — 14 jurisdictions, up to 7 MCP connectors, primary-source citation discipline.

ArthurLegal is a set of multi-jurisdiction legal assistant packages that run on

Claude.ai Projects. Each package is a SYSTEM_PROMPT.md (Custom Instructions)

plus a knowledge/ folder of consolidated skill books, practice-area profiles,

scheduled agent definitions, and a primary-source reference layer.

It is built for legal work that crosses borders: a contract governed by English

law, arbitrated in Geneva, with an Azerbaijani counterparty and an EU

data-transfer question is one workflow, not four.

The two flagship packages are multi-jurisdictional. Academician and Courthouse are

built around Turkish academic-promotion and Turkish judicial procedure

respectively, and are jurisdiction-specific by design.

- Primary-source MCP (verbatim norm text and case law): Türkiye · Switzerland ·

United States (case law) · Azerbaijan — via TR Legal MCP (15

institutions, 40+ tools), OpenCaseLaw.ch (972K+ Swiss federal and cantonal

decisions, 33 tools), CourtListener (Free Law Project — US federal and state

opinions, PACER dockets, citation network, and citation verification as a defence

against fabricated citations), Fedlex (Swiss federal legislation — article

text and amendment history), e-qanun (official api.e-qanun.az with in-force

status verification).

- Legislation via WebFetch (no extra connector): UK · US (federal legislation,

GovInfo) · EU / CJEU / ECHR · Germany · France · Italy · Japan · Russia · China ·

- Cross-cutting corpora: ResourceContracts (5,125 signed petroleum and

mining contracts across 107 countries with expert clause annotations, CC BY-SA

4.0, NRGI/CCSI) · LexScholar (10 federated open-access scholarship indexes) ·

OpenSanctions (REST API — sanctions / PEP screening).

Türkiye currently has the deepest coverage — a dedicated MCP server spanning 15

institutions and the largest share of the reference layer. Switzerland, the United

States and Azerbaijan follow with primary-source MCP access.

Design principle: no unsourced law

Every legal proposition in the output carries its source and retrieval date

([Legislation MCP — date], [Case Law MCP — institution — date], `[model

knowledge — verify]`). Unretrieved text is never presented as retrieved. Tool

calls are cancelled at 100 seconds and a cancelled call returns nothing — when

scope narrows, the assistant states it instead of filling the gap from memory.

All output is a draft for attorney review.

v1.4.0 (2026-07-26) added a legal-research source layer and three

self-hosted, auth-free MCP servers (e-qanun, LexScholar, ResourceContracts). All

three are optional; without them the packages still work and the assistant notes

the narrowed scope.

## License

Proprietary — Non-Commercial Use Only. All Rights Reserved.

Source-available but not open source. Commercial use is prohibited; within that

limit, use, running and modification for non-commercial purposes are permitted.

Expressly not commercial use: use by in-house counsel or any member of an

in-house legal department in the ordinary course of their duties; use by a law

firm employee — partner, associate, trainee, paralegal — in the ordinary course

of their duties, including work for the firm's clients; personal use by a natural

person; and modifications made by or commissioned for such permitted use, where

not distributed.

Revenue earned from the legal services in which the software is used does not

make that use commercial. What is prohibited is commercializing **the software

itself** — selling, sublicensing, redistributing, or offering it as a product or

hosted service. Redistribution of any kind requires prior written permission.

## Third-party components

Includes third-party components licensed under the Apache License 2.0 — the

Anthropic [claude-for-legal](https://github.com/anthropics/claude-for-legal)

knowledge base. Those components remain governed by their own license; license

texts and attribution notices are retained in the release packages and must not

be removed. In case of conflict, Apache 2.0 governs those components.

## Installation

Per-package: INSTALLATION.md (English, Law Firm) or KURULUM.md (Turkish).

Roughly 15 minutes — create a Claude.ai Project, paste the system prompt, upload

the knowledge folder, add the MCP connectors, fill in the profile template.

## Note on interface language

The knowledge layer and system prompts are written in Turkish and the assistant's

default working language is Turkish. Jurisdictional reach is multi-jurisdictional;

the interface language is not yet.