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cocounsel-legal:deep-research

Generate written legal research reports on U.S. caselaw, statutes, and regulations.

9.1k|1.8k|Updated Apr 21, 2026
Search Tags:#legal research#deep research#jurisdiction#legal writing#westlaw#u.s. law#case law synthesis
One-click install
npx skills add https://github.com/anthropics/claude-for-legal --skill cocounsel-legal-deep-research-anthropics
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: cocounsel-legal:deep-research
Source: https://github.com/anthropics/claude-for-legal/tree/main/external_plugins/cocounsel-legal/skills/deep-research
Command: npx skills add https://github.com/anthropics/claude-for-legal --skill cocounsel-legal-deep-research-anthropics

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps you produce a structured legal research report that explains, analyzes, or synthesizes relevant U.S. legal authority, so you can move from a legal question to a cited research output more quickly.

Core Features & Use Cases

  • Deep U.S. legal research, end-to-end: Frames the question, runs the full research cycle, and returns a written report suitable for attorney review.
  • Authority synthesis across legal sources: Covers caselaw, statutes, regulations, administrative decisions, and trusted secondary materials (including Practical Law, Current Awareness/updates, and related materials available via Westlaw Deep Research).
  • Jurisdiction-aware legal analysis: Uses up to three jurisdictions when none or too many aren’t specified, focusing the research on the governing legal standards.

Example use case

Ask for how a court in a particular jurisdiction interprets an element or defense of a claim, and receive a report that lays out the supporting and challenging authority.

Quick Start

Use cocounsel-legal:deep-research to research whether courts in California treat a specific statutory element as requiring proof of intent in addition to other factors, and include relevant authority and analysis.

Frequently Asked Questions about cocounsel-legal:deep-research

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
Can I use deep legal research across multiple jurisdictions at once?▼

Yes, legal research reports can analyze and synthesize authority across up to three specified jurisdictions. If you omit jurisdictions or provide too many, it applies default focusing to identify the governing legal standards.

How do I get a written legal analysis on how a court interprets a specific statutory element?▼

To get a written legal analysis, you input a question about how a court interprets a statutory element or defense. The tool frames the question, runs the research workflow, and presents the completed report laying out supporting and challenging authority verbatim.

What sources are covered when synthesizing legal authority for a research report?▼

Legal authority synthesis covers U.S. caselaw, statutes, regulations, administrative decisions, and trusted secondary materials. It retrieves Practical Law, current awareness updates, and related sources through the Westlaw Deep Research workflow.

Does this legal research tool require a Westlaw connection to analyze statutes and caselaw?▼

Yes, generating legal research reports requires a connected cocounsel-legal MCP server. This connection initiates and polls the Westlaw Deep Research workflow to retrieve and synthesize the relevant U.S. legal authority.

When should I not use automated deep research for unsettled legal issues?▼

You should not use automated deep research as a final determination for unsettled legal issues. While it provides arguments and analysis on unsettled issues, the output is a structured report designed to require attorney review before application.

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