Claude Project: A Firm Style Editor for Consistent Documents Across Every Attorney

What This Builds

Two attorneys at the same firm can produce documents that read like they came from two different offices: one writes "Party" with a capital P, the other doesn't; one signs off formally, the other casually. Clients notice, even if they can't name why. This build sets up a Claude Project that reviews any draft against the firm's actual style preferences and flags the inconsistencies before the document goes out, functioning like an in-house editor without adding headcount.

Prerequisites

• A Claude account. A Pro plan Project works for one attorney reviewing their own drafts; a firm-wide editor that every attorney routes documents through needs a Team plan
• Three to five documents the firm considers "on-brand," covering a few different document types (a letter, a short brief, a client email)
• A short list of firm-specific conventions: capitalization rules, preferred terms, formatting habits
• Total ongoing cost: $20/month per attorney at minimum. If more than one attorney needs to run drafts through the same shared Project, budget for the Team tier instead. Check claude.ai for current pricing on both.

The Concept

Picture a senior partner who has read every document the firm has ever sent out and can spot, in seconds, that this memo drops articles the way the firm never does, or that this letter's closing doesn't match house style. That's what this Project does, minus the years it would take a human to build that pattern recognition. You feed it real examples of firm-approved writing once, and it compares new drafts against that pattern every time you ask.

Build It Step by Step

Part 1: Define What "Firm Style" Actually Means

1. Pull three to five documents attorneys at the firm agree represent the firm's voice well. Mix document types rather than five versions of the same letter.
2. Write down the rules that aren't obvious from reading alone: does the firm use Oxford commas, how are dates formatted, does "Client" get capitalized, is "shall" required over "will."
3. Ask each attorney who'll use this what inconsistency bothers them most in colleagues' drafts. That list becomes the Project's priority checklist.

Part 2: Create the Project

1. Create a new Claude Project named something like "Firm Style Review."
2. Set custom instructions along these lines:

You review documents for consistency with [Firm Name]'s house
style, using the example documents in Project knowledge as the
standard.

When given a draft, check for:
- Capitalization of defined terms (consistency, not grammatical
  correctness alone)
- Formality level matching the example documents
- Formatting conventions: dates, headings, signature blocks
- Terminology the firm consistently uses or avoids

Return a short list of specific inconsistencies with the line or
section they appear in. Do not rewrite the whole document unless
asked. Do not comment on the legal substance or accuracy of the
document; that is outside your role here.

1. Upload the firm's style example documents to Project knowledge.
2. If the firm is on a Team plan, add the attorneys who should have access to this Project.

Part 3: Run It Against Real Drafts

1. Paste in a recent draft (redacted of client-identifying details) and ask for a style review.
2. Compare its flags against what a partner would actually catch. If it's too picky (flagging stylistic choices that are fine) or too lenient (missing an obvious inconsistency), adjust the instructions to be more specific about what matters.
3. Once it's reliable, make running a draft through this Project a normal step before a document leaves the building, the same way a template or checklist would be.

Real Example: Two Associates, One Voice

Setup: A four-attorney general practice firm loads five client letters and two short motions into the Project, with instructions to flag capitalization and tone drift specifically.

Input: A junior associate's draft settlement letter, redacted, pasted into the Project.

Output: Three flags: inconsistent capitalization of "the Agreement," a closing line more casual than the firm's usual sign-off, and a paragraph that used contractions where the firm's other letters never do.

Time saved: A partner manually line-editing for style used to add 10-15 minutes to reviewing every junior associate draft. Running it through the Project first catches the obvious issues, cutting that partner review time roughly in half.

What to Do When It Breaks

• The Project starts flagging things that are actually fine → Its sense of "style" is only as good as the examples you gave it. Add a few more documents that show acceptable variation, not just one rigid template.
• It comments on legal substance instead of sticking to style → Reinforce the boundary in the instructions: it reviews formatting and tone only, never the legal content or strategy behind the document.
• Different attorneys get inconsistent results from the same Project → Confirm everyone is using the same Project rather than separate personal ones with their own instructions. On a Pro plan, each attorney's Project is isolated, which defeats the purpose. This is the point where a Team plan earns its cost.

Variations

• Simpler version: Skip the Project and paste your style rules directly into a saved prompt for occasional use, if only one attorney needs this and firm-wide sharing isn't a priority yet.
• Extended version: Split into separate style Projects per document type (correspondence versus filings), since a settlement letter and a motion follow different conventions even at the same firm.

What to Do Next

• This week: Gather the example documents and get the Project running for your own drafts first.
• This month: Roll it out to the rest of the firm and collect a running list of style rules it still misses.
• Advanced: Pair this with the reusable objection library Claude Project so both drafting content and style review pull from the same firm-voice foundation.

A Note on Confidentiality and Verification

The example documents and any draft you run through this Project should never include a live client's name, case number, or facts specific enough to identify them. Even a settlement letter used purely as a style example carries real client information, so redact it or replace the facts with fictional ones before it goes into Project knowledge, and check your state bar's current guidance on AI tools before treating this as a standing part of your review process for active matters. Because a style review only checks formatting and tone, it is not a substitute for the substantive legal review every document still needs before it reaches a client or a court. Treat its flags as one more editing pass, not the final sign-off.

Advanced guide for small firm attorneys. These techniques use more sophisticated AI features that may require paid subscriptions.