Øby's legal tools for Claude Cowork

Stian Øby Johansen's collection of skills and other tools for use with Claude (cowork).

Document retrieval skills

These skills each connect Claude to a single legal database. Install the ones you need. Click the skill name in the table below to open its README file.

Skill	What it does
efta-court	EFTA Court judgments
ets	Council of Europe treaty series
eurlex	EU legislation and case law from EUR-Lex
hudoc	European Court of Human Rights judgments from HUDOC
icj	ICJ and PCIJ case law, jurisdiction data, and Article 36(2) declarations
lovdata-api	Norwegian legislation from Lovdata (free content)
lovdata-pro	Norwegian case law and preparatory works from Lovdata Pro
nbno	Documents from the National Library of Norway (Nasjonalbiblioteket)
norges-traktater	Norway's treaty register
untc	UN Treaty Collection — treaty texts and ratification status

Research workflow skills

These skills orchestrate the document retrieval skills above to carry out broader academic research tasks. To use them, install both the workflow skill and all the retrieval skills it depends on. Click the skill name in the table below to open its README file.

Skill	What it does	Requires
kildesjekk	Verifies every reference and quotation in an academic legal text against the original sources; produces an .xlsx worklist with per-reference status and severity-coded discrepancies	All document retrieval skills above

Installing a skill

Skills are installed through Claude Desktop — the desktop app for Mac and Windows. You will need a Claude plan that includes Skills (Pro, Team, or Enterprise).

Step 1 — Download the skill file

1. Go to the Releases page of this repository. You can also find it by clicking Releases in the right-hand sidebar on the GitHub repository page.
2. Click on the top entry in the list — that is the most recent release.
3. Scroll down to the Assets section and click the .zip file for the skill you want to install — for example eurlex.zip. The file will download to your computer like any normal file.

Step 2 — Open the Skills panel in Claude Desktop

1. Open the Claude Desktop app.
2. Look for the Customize button — it is usually found at the top left of the window.
3. Click Customize, then click Skills in the menu that appears.

Step 3 — Upload the skill

1. In the Skills panel, click the + button.
2. A small menu appears. Click Create skill, then Upload a skill.
3. A file picker opens. Navigate to the .zip file you downloaded in Step 1, select it, and confirm.
4. Claude will process the file and the skill will appear in your list of installed skills.

That's it. The skill is now active in your Claude sessions. You do not need to type a command to activate it — Claude will use it automatically whenever your question matches what the skill can do.

Need more help? Anthropic's official guide — Use Skills in Claude — covers the full details, including how to check whether your plan includes Skills.

Installing multiple skills

Each skill is a separate .zip file. To install several skills, choose several of the .zip.files at the same time when using the file picker in step 3.