A skill (Claude Skill) is a folder containing instructions that Claude is automatically picked up when the task matches it. It contains a file describing the skill and a step-by-step workflow, and sometimes supporting materials. Claude continually sees the names and descriptions of installed skills and loads the full text only when a skill is needed, so you can keep many of them without overloading the system. Once installed, a skill works in all new chats.
Our skills give the model a carefully designed workflow on top of the connector: where an ordinary query returns a list of acts, a skill turns them into an output tailored to a specific task. Case law is taken exclusively from CasusLegal connector databases (the highest courts, the Intellectual Property Court and the Administrative Chamber), with no fictional cases.
For ChatGPT all four skills are combined into a single skill. In ChatGPT a tab has appeared next to the “Plugins” tab “Skills” — these are the same skills, but loaded as a single file. We packaged all four use cases into one bundle: download it and upload it in the “Skills” tab.
The skill does not itself provide access to the database—it only defines ChatGPT the correct route through the connector. For case law to actually be found, the CasusLegal plugin must be connected (see the “Connection”).
Codex skills are on a separate page. A separate zip package has been prepared for Codex containing the same four workflows, instructions for installation without a terminal, and options using PowerShell or the macOS/Linux terminal.
Provide the facts and legal position, or upload the claim to which a response is required. The skill assembles a ready-to-file procedural document: a statement of claim, defence, or objections; an appeal or cassation appeal; a response to an appeal; an application; or a motion. Case law from the higher courts is incorporated selectively, using one or two key acts per argument, with verbatim quotations from the database. The work proceeds in two stages: first, a Markdown draft with active links to the acts and highlighted quotations for approval; then, after approval, a black-and-white DOCX in strict procedural formatting (Times New Roman, A4, block quotations with a side rule, clickable links to each act, and a catalogue of the case law used at the end). The document contains no branding: it is a lawyer’s work product, not promotional material. The case law is drawn from the higher courts, the Intellectual Property Court, and the KAS corpus relevant to the subject of the argument.
“Draft a response to the cassation appeal in this case and support each argument with Supreme Court case law.”Download a ready-made example of the skill in action—a response in a land lease case (DOCX) →
Provide a procedural document (appeal, response, opinion, or statement of claim) or a prepared list of propositions. For each proposition, the skill compiles two separate collections of case law from the higher courts: supporting case law and, separately, case law that refutes or limits it. Countervailing case law is sought deliberately through a counter-query, so you can see not only what supports the position but also what limits it. The skill does not formulate a position or give advice: it finds and classifies acts, leaving the legal assessment to you. It operates through three CasusLegal connectors: the higher courts; the IP Court for intellectual-property disputes; and KAS for administrative cases and judicial review of regulations.
“Select Supreme Court and Supreme Commercial Court case law for the propositions in my cassation appeal: separately in support and against.”Upload a judgment or ruling of a lower court. The skill breaks down the reasoning into propositions and, for each, shows its status in relation to the case law of the higher courts: confirmed, divergent, or not covered. For divergent propositions, it identifies the specific acts, their hierarchical weight (from Constitutional Court and Plenum rulings to rulings of Supreme Court chambers), and the substance of the contradiction. The check also works for intellectual-property acts through the IP Court and for administrative cases or judicial review of regulations through KAS.
“Check this appellate ruling for compliance with Supreme Court and Supreme Commercial Court case law.”Provide the number or title of a Plenum ruling of the Supreme Court of the Russian Federation or a Case Law Review. The skill works through the act point by point: each point is accompanied by a verbatim proposition and a brief neutral analysis, and the connector then links it to the primary judicial acts from which the point developed, as well as to case law on its application throughout the period from the date of adoption. For each point, 2–3 key precedents are selected, with the substance of their application. Two outputs from the same model: interactive HTML in the CasusLegal style (modals with propositions and excerpts, clickable navigation) and a DOCX with hyperlinks. Reviews and reference materials of the Intellectual Property Court are analysed in the same way, and case law on application is selected through the higher courts, the IP Court, or KAS according to the subject of the point. Case law is taken only from the database; no cases are invented.
“Prepare an article-by-article analysis of Supreme Court Plenum No. 49 on the conclusion and interpretation of contracts, linked to case law.”If the Customize button is not available in the panel, skill uploads may not be available on the free plan. Check Pro, Max, Team, or Enterprise.
It is easy to configure a skill for your own work through a simple chat conversation. Name the skill or describe which one you mean, and ask for changes. For example: “in the ‘Case Law for Propositions’ skill, do not show Supreme Commercial Court acts,” “search only case law from the last five years,” “make the final conclusion shorter, without lengthy quotations.” Claude will rewrite the skill instructions; all that remains is to save the new version.
You can build your own skill from scratch without writing a single line of code. In the Skills section, click “+” and select Create skill, the Create with Claude. Describe your recurring task in your own words and specify that the case law must be obtained through the CasusLegal connector. Claude will ask clarifying questions and assemble the skill itself; you can then edit it through the same conversation. This is how personalised skills based on the connector are created.
“Build a skill: for each draft judgment, use CasusLegal to find Supreme Court case law for and against, and put divergences in a table.”There is another way, right in the course of your work. If you liked how the connector handled a task in a conversation, ask Claude to analyse that successful approach and preserve it as a skill. Claude will study how the task was solved and create a skill that can then be launched with a single phrase.
“Study how we just solved this task through CasusLegal and build a skill from it.”Have you created a useful skill or come up with an idea? Send it to our channel. We are building a library of skills based on the connector and sharing it with the community.
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