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Claude for Legal (GitHub Repo)
Anthropic released Claude for Legal on GitHub with 12 practice-area plugins, 100+ workflow agents, and a security-reviewed marketplace for community legal skills.
What: Anthropic open-sourced Claude for Legal, a repository with 12 practice-area plugins (commercial, corporate, employment, privacy, product, regulatory, AI governance, IP, litigation, plus legal clinic and law school modules) containing 100+ named workflow agents. Includes MCP connectors for Thomson Reuters CoCounsel, Ironclad, DocuSign, iManage, Everlaw, and CourtListener. Runs as Claude Cowork/Code plugins or deploys via Managed Agents API. Apache 2.0 licensed.
Why it matters: This shows Anthropic moving beyond general-purpose assistants into vertical AI stacks with domain-specific guardrails (mandatory source attribution, conservative defaults on privilege, explicit review gates before filing). The legal-builder-hub creates a trust layer for community skills with security scans, allowlists, and license gates, suggesting a model for safe AI skill marketplaces in regulated domains.
Takeaway: Study https://github.com/anthropics/claude-for-legal as a reference architecture for vertical AI applications with domain-specific guardrails and MCP connector patterns.
Deep dive
- 12 practice-area plugins each include a cold-start interview that learns your playbook and writes a practice profile (CLAUDE.md) that every skill in that plugin reads from
- Named workflow agents include Vendor Agreement Reviewer, DSAR Responder, Claim Chart Builder, Termination Reviewer, NDA Triager, Board Consent Drafter, and 100+ others
- MCP connectors wire Claude to legal systems: Thomson Reuters CoCounsel (Westlaw Deep Research), Ironclad (contract lifecycle management), DocuSign, iManage (document management), Everlaw (e-discovery), CourtListener (federal dockets)
- Dual deployment: install as interactive Claude Cowork/Code plugin OR deploy via Managed Agents API for scheduled/headless workflows (renewal watcher, docket watcher, regulatory feed monitor)
- Built-in guardrails reflect attorney-review requirement: source attribution on every citation, conservative defaults on privilege and subjective legal calls, jurisdiction assumptions surfaced, explicit gates before anything is filed or sent
- Microsoft 365 integration: contract review skills output Word tracked changes preserving styles and numbering, diligence skills output Excel workbooks with citation columns
- legal-builder-hub provides a trust layer for community skills: injection detection, hidden-content scans, source allowlists, license gates (personal/firm/commercial), freshness tracking for bundled regulatory content, install audit logs
- Scheduled agents run on cron cadence: renewal watcher scans contract registers for cancel-by deadlines, docket watcher monitors court filings, reg-change monitor polls regulatory feeds and writes Monday digests
- All skills are markdown files with YAML frontmatter, no build step — customize by editing practice profiles or forking skills directly
- Example workflows: tabular M&A diligence (one row per document, every cell cited to source), element-by-element patent claim charts, privacy triage (PIA vs mandatory DPIA vs proceed), AI impact assessments across regulatory regimes
Decoder
- DSAR: Data Subject Access Request — GDPR right for individuals to request a copy of their personal data a company holds
- PIA: Privacy Impact Assessment — internal review of how a project affects user privacy
- DPIA: Data Protection Impact Assessment — mandatory GDPR assessment required for high-risk data processing activities
- DPA: Data Processing Agreement — contract between data controller and processor defining how personal data is handled under GDPR
- FTO: Freedom To Operate — patent clearance analysis to determine if launching a product would infringe existing patents
- VDR: Virtual Data Room — secure online repository for sharing confidential documents during M&A due diligence
- MCP: Model Context Protocol — Anthropic's standard for connecting Claude to external data sources and tools
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