Claude Projects changed how lawyers should think about AI. Instead of starting every conversation from scratch -- re-explaining your case, your jurisdiction, your client's position -- you build a persistent workspace that remembers everything. Upload your case file. Set your instructions once. Every conversation in that project starts with full context.

This is the feature that makes Claude genuinely useful for complex legal work, not just quick questions. Managing partners running multi-month litigation should be using Projects as their AI command center. Here's the complete setup guide.

A Claude Project is a workspace with three components: custom instructions that apply to every conversation, uploaded knowledge files that Claude can reference, and conversation threads organized by topic. For lawyers, this maps perfectly to matter management. Create one project per case or matter. Upload the complaint, key motions, deposition transcripts, and relevant statutes. Set instructions like 'You are assisting on a breach of contract case in the Southern District of New York. The client is the defendant. Apply New York law and Second Circuit precedent.' Every conversation in that project -- whether you're drafting discovery responses or analyzing a new motion -- starts with that full context. No more copy-pasting background into every chat.

Setting Up a Matter-Based Project: Step by Step

Step 1: Create a new project and name it with your matter number and short description (e.g., '2026-0142 Smith v. Jones Breach'). Step 2: Write custom instructions covering jurisdiction, your client's position, key legal issues, and your preferred output format. Be specific: 'Always cite to the Federal Rules of Civil Procedure. Use Bluebook citation format. Draft in a formal but concise tone suitable for the Southern District of New York.' Step 3: Upload key documents. Claude Pro supports up to 200K tokens of project knowledge -- roughly 150 pages of text. Prioritize the complaint, answer, key motions, and governing statutes. Step 4: Start conversations by topic: 'Discovery Strategy,' 'MSJ Research,' 'Deposition Prep.' Each thread maintains its own history while sharing the project knowledge base.

Five Workflow Patterns That Work

Pattern 1: Rolling Research Memo. Start a conversation thread called 'Research' and build it over weeks. Each session adds to the analysis. Claude remembers the earlier threads' context through project knowledge. Pattern 2: Deposition Prep. Upload the witness's prior testimony and relevant exhibits. Ask Claude to generate cross-examination questions organized by topic. Pattern 3: Brief Drafting. Upload opposing counsel's brief. Start a conversation with 'Identify every factual assertion and legal argument, then outline our response addressing each point.' Pattern 4: Contract Review. Upload the draft agreement and your client's term sheet. Ask Claude to flag discrepancies and suggest markup language. Pattern 5: Case Timeline. Feed Claude all date-specific facts from the case file and have it generate a chronological timeline with source references.

Confidentiality and Data Handling

Anthropic does not train its models on Claude Pro, Team, or Enterprise inputs. This is contractually guaranteed, not just a policy. Your uploaded case files and conversations are not used for model training. For firms with strict data governance, Claude for Enterprise adds SSO, admin controls, and audit logs. The practical approach: use Claude Projects for matters where you'd be comfortable using any cloud-based legal tool (Westlaw, Lexis, cloud DMS). If a matter requires air-gapped security, AI tools on public cloud infrastructure aren't appropriate regardless of the provider.

Claude Projects vs Custom GPTs: Projects are better for complex, evolving matters that require deep context. Custom GPTs are better for repeatable, structured workflows. Use Projects for your biggest cases, Custom GPTs for routine tasks. Claude Projects vs Harvey/CoCounsel: Commercial legal AI tools offer verified legal databases and citation checking that Claude doesn't. But they're expensive ($100-500+/user/month) and less flexible. Claude Projects at $20/month give you 80% of the capability for 10% of the cost. The combination play: Use Claude Projects for analysis and drafting, then verify citations in Westlaw/Lexis. You get the best AI reasoning at a fraction of the cost.

The Bottom Line: Claude Projects turn AI from a one-off question machine into a persistent legal assistant that knows your case inside out. The 30 minutes you spend setting up a project saves hours across every conversation for the life of that matter. Start with your most document-heavy active case -- that's where the ROI is immediate.

AI-Assisted Research. This piece was researched and written with AI assistance, reviewed and edited by Manu Ayala. For deeper takes and the perspective behind the research, follow me on LinkedIn or email me directly.