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Master Claude for Legal

Free

Skill pack for legal teams. NDA triage, multi-party version diff, citation verifier, meeting brief, and the Friday-newsletter status synthesis pattern. Includes 10 reference docs (privilege, verification, long documents, practice areas) and 3 firm templates. Built from the public Anthropic Claude fo

FreeFree tier
Type
Open Source
Company
HAQQ Legal AI
Visit Website GitHub (40 stars)

About Master Claude for Legal

Master Claude for Legal is an open-source skill pack designed for legal teams using Claude (Anthropic's AI assistant). It enables users to set up Claude correctly for privileged legal work, customize the legal plugin, and ship production legal automation in an afternoon. The pack is built from both of Anthropic's 2026 public legal webinars (Claude for Legal Teams and How Legal Teams Put Claude to Work) and is maintained by HAQQ Legal AI.

The skill pack comes in four layers:

  • Reference docs (15 documents): Covering the four-pillar architecture, four privilege layers, common vocabulary, MCP permission hardening, connector catalog (Box, Harvey, Thomson Reuters, Free Law Project, Courtroom5, etc.), 12 practice-area plugins, Microsoft 365 cross-surface integration (Word, Excel, PowerPoint, Outlook), managed agents, cold-start customization, citation verification, agentic harness for long documents, practice-area patterns, a four-hour setup checklist, a skill-authoring guide, and production anti-patterns.
  • Starter skills (6 working skills): NDA triage, multi-party version diff, tabular review (M&A diligence pattern), meeting brief, citation verifier, and status synthesis (Friday newsletter pattern). Each is a markdown file meant to be remixed for specific firm needs.
  • Templates (3 documents): A firm AI policy template, a one-page client-facing data-handling explainer, and a vendor security questionnaire for legal-AI tools.
  • Data: Full transcripts of both webinars, 51 audience questions from the April session with upvotes and themes, and machine-readable JSON for further analysis.

Licensed under MIT, contributions welcome.

Key Features

15 reference documents covering privilege, MCP permission hardening, connector catalog, practice-area plugins, Microsoft 365 integration, citation verification, and anti-patterns
6 starter skills: NDA triage, multi-party version diff, tabular review (M&A diligence pattern), meeting brief, citation verifier, and status synthesis (Friday newsletter pattern)
3 firm templates: AI policy, client-facing data handling explainer, and vendor security questionnaire
Full webinar transcripts and audience Q&A data for analysis
Remixable markdown files for customization to firm-specific needs
Based on practices from Anthropic's own legal team webinars
Open-source and free under MIT license

Pros & Cons

Pros
  • Comprehensive pack with reference docs, skills, templates, and source data
  • Built directly from Anthropic's legal team practices
  • Open-source and free (MIT licensed), no vendor lock-in
  • Remixable for specific firm needs – not a finished product
  • Actively maintained by HAQQ Legal AI
  • Covers privileged work setup and compliance considerations
  • Includes raw webinar data for transparency and further research
Cons
  • Requires Claude or compatible tool (Claude Code, Cowork) to use skills
  • May require some familiarity with Anthropic-format skill files
  • Community resource, not an official Anthropic product
  • Active development may lead to changes without warning

Best For

NDA triage and classificationMulti-party document version diffTabular review for M&A due diligenceMeeting brief generation from notes or transcriptsCitation verification in legal documentsStatus synthesis (e.g., weekly Friday newsletter pattern)Legal automation skill authoring and deploymentLearning best practices for using AI in legal work

FAQ

What is Master Claude for Legal?
It is an open-source skill pack for legal teams using Claude. It includes reference docs, starter skills, templates, and data from Anthropic's legal webinars to help legal professionals build automation and best practices.
What does the pack include?
The pack has four layers: 15 reference documents, 6 starter skills (NDA triage, version diff, tabular review, meeting brief, citation verifier, status synthesis), 3 firm templates (AI policy, client explainer, vendor questionnaire), and full webinar transcripts with audience Q&A data.
How do I install the skills?
The skills are markdown files that can be installed into Claude, Cowork, Claude Code, or any tool supporting Anthropic-format skills. See the repository's SKILL.md for instructions.
Is this free and open-source?
Yes, it is MIT licensed and free to use, remix, and contribute to.
Who maintains this project?
The project is maintained by HAQQ Legal AI. Contributions are welcome.