Custom AI writing systems — built for Claude Cowork.

Your AI writing system, built for you.

Stop wrestling with generic AI output. Get a complete writing system — voice profile, custom skills, business context — built from scratch around how you think, write, and work.

Built for Claude Cowork
Build Your System → Now accepting applications
The Problem

You know AI can transform your content. You just don't have time to figure it out.

Spending on freelancers who miss your voice
Every draft needs heavy editing. The output sounds generic. You end up rewriting half of it yourself.
Starting from scratch with every AI session
No context carries over. You re-explain your business, your audience, your voice every single time.
Competitors are outpacing you with AI
They publish more, faster, and more consistently. You know the gap is growing but building systems feels overwhelming.
ChatGPT gives you generic output
AI-generated content reads like AI-generated content. It lacks your perspective, your edge, your expertise.
The Solution

A writing system that knows your voice, your business, and your goals.

Not a prompt template. Not a course. A fully built writing system — custom skills, voice profile, business context — ready to produce content the moment you open Claude.

Voice captured and codified
Your writing style, tone, vocabulary, and patterns analyzed and encoded into a voice profile Claude actually uses.
Custom skill library
Purpose-built skills for your specific content types — newsletters, social posts, thought leadership, whatever you publish.
Business context built in
Your audience, positioning, competitors, and goals baked into the system. Claude knows what you know.
Ready immediately
No learning curve. No setup required. Open Claude, use your skills, publish content that sounds like you wrote it — because the system learned from you.
What You Get

Everything inside your custom system

See It Work

Your writing system in action.

Simple requests. No hand-holding. It already knows your context.

Claude Cowork — your-writing-system
You
write my LinkedIn post about hiring your first AI employee
Read voice-profile.md, business.md
Skill linkedin-post
✓ LinkedIn post ready
I hired my first employee last month.

Not a person. A writing system.

It knows my voice, my positioning, and my audience better than any ghostwriter I've worked with. It doesn't need onboarding. It doesn't take PTO…

[Full post in your voice, formatted for LinkedIn]
You
newsletter on this https://anthropic.com/news/claude-cowork
Read voice-profile.md, audience.md
Skill newsletter
✓ Newsletter draft ready
Subject: Anthropic just changed the game for non-technical professionals

This is the moment I've been waiting for. Claude Cowork takes everything I've been building manually and puts it in a conversational interface anyone can use…

[1,200 words in your voice, formatted for Substack]
You
need a welcome sequence for new subscribers
Read voice-profile.md, audience.md, business.md
Skill email-sequence
✓ Email sequence ready
Email 1 (Day 0): “Here's what you signed up for”
Email 2 (Day 2): “The mistake everyone makes”
Email 3 (Day 5): “My system (the short version)”
Email 4 (Day 8): “Quick question for you”
Email 5 (Day 12): “Ready to go deeper?”

[Full copy for each email, ready to paste]
You
help me think through pricing for the new offer
Read business.md, audience.md
✓ Strategy breakdown
Based on your ICP and positioning, here's how I'd think about it:

Option A ($997): Lower barrier, higher volume needed. Works if you're building audience…

Option B ($1,500): Signals premium. Your audience won't blink at this price if the value is clear…

My take: Given your premium positioning, $1,500 creates better price anchoring for your value ladder…

[Continues with pros/cons, launch strategy options]

No prompt engineering required. Your system already knows.

Voice Profile

Your voice — captured and codified.

Every system starts with a voice profile. It’s how Claude learns to write like you — your sentence rhythm, your vocabulary, the things you’d never say. Three ways to build it:

Personal

Your voice

Already have writing you’re proud of? Perfect. Send me your best blog posts, newsletters, LinkedIn content, emails — anything that sounds like you. I analyze your patterns and build a profile Claude actually uses.

Inspired

Inspired voice

Don’t have existing writing samples? No problem. Share writers, creators, or brands you admire — people whose style you want to channel. I build a voice profile informed by their approach, tuned to your business.

Brand

Brand voice

Have brand guidelines or a style guide? I codify them into a working voice profile — tone, terminology, do’s and don’ts — so every piece of content stays on-brand automatically.

Don’t have a “voice” yet? That’s more common than you think. Most people applying don’t have 50 blog posts to analyze. You just need a direction — who do you want to sound like? What tone fits your business? Alex works with you to develop a voice profile from scratch, not just capture one that already exists.

Example Skills

Skills I can build for your system.

Every skill is custom-built around your voice, your audience, and your content types. These are examples — your system gets exactly what you need.

LinkedIn Posts
Posts, Calendar, Profile Optimization
Newsletters
Thought Leadership, How-to Guides, Listicles, Story-driven Essays
Email Sequences
Welcome Series, Launch Sequences, Nurture Campaigns, Sales Sequences
Blog Articles
Long-form Articles, How-to Guides, SEO Optimization
Landing Pages
Sales Pages, Opt-in Pages, Product Pages
Case Studies
Client Results, Transformation Stories, ROI Breakdowns
Podcast Show Notes
Episode Descriptions, Outlines, Key Takeaways
Course Materials
Module Outlines, Lesson Scripts, Assignments
Research Briefs
Competitive Analysis, Audience Research, Industry Briefings
Voice Profile
Voice Capture, Voice Audit, Voice Refinement

These are examples. Every system is built custom for your specific content types and workflows.

Live Connectors

Connect your system to your platforms.

Connectors give your writing system live access to your platforms. Write with real data, not guesses.

YouTube

Channel stats, video analytics, comments

Substack

Post analytics, subscriber growth, email stats

Kit

Email sequences, broadcasts, subscriber management

Perplexity

Web research, citation-backed answers

Firecrawl

Web scraping, site crawling, data extraction

WordPress

Posts, media, categories, publishing

Connectors give your system live access to your platforms. Strategy based on real data, not guesses.

How It Works

Five steps. 48 hours.

Step 01
Apply

Fill out a short application. Alex reviews it and reaches out with a proposal tailored to your needs.

Step 02
Payment

Agree on scope and pricing. Simple Stripe invoice — no subscriptions, no recurring fees.

Step 03
Intake

Fill out a detailed onboarding form. Business details, writing samples, links, goals, audience. Everything Alex needs to build your system.

Step 04
Build

Alex personally builds your writing system. Custom voice profile, skills, context, and configuration. Delivered in 48 hours.

Step 05
Handoff

Your complete system delivered as a zip file or Google Drive folder. Includes a custom onboarding video from Alex. Plug it into Claude Cowork and start writing immediately.

48-hour delivery
Async support included
Own it forever
Who It's For

Built for people who publish, not tinker.

Executive
Founders & CEOs

You need a thought leadership presence but every hour spent writing is an hour away from running your company.

Authority
Thought leaders

You have the ideas and expertise. You need a system that captures your perspective and helps you publish consistently.

Scale
Marketing leads

Your team needs to produce more content without sacrificing quality. A system that maintains brand voice at scale.

Leverage
Consultants & coaches

Your expertise is the product. A writing system that turns your knowledge into newsletters, posts, and courses — fast.

Who Builds It

I personally build every system.

Alex McFarland
AI writing systems builder

I run my entire content operation through Claude — no employees, no other AI tools, no freelancers. Personal brand, client ghostwriting, automated publishing. Everything built on custom writing systems. When I build yours, I use the same methodology that powers my own operation.

11K+ Substack subscribers
#2 Substack Technology
4K+ YouTube subscribers
FAQ

Common questions

Custom systems start at $2,500 and go up to $5,000+ depending on scope — number of content types, complexity of workflows, and depth of voice capture required. You get a clear quote after applying.
Most systems are delivered within 48 hours of receiving your materials. Complex builds with multiple content types and advanced workflows may take up to 5 business days.
No. The system runs inside Claude Cowork — a conversational interface. If you can use a messaging app, you can use this. No coding, no terminal, no technical setup.
Your business details, audience info, content goals, and links to your online presence. If you have writing samples, great — send 5–10 of your best pieces. If you don’t, share writers or brands whose style you want to channel. The intake form walks you through everything.
Yes, completely. The system lives on your machine in files you control. No subscriptions, no lock-in, no dependency on me. It is yours forever.
Absolutely. Everything is built in markdown files and folders. You can edit, expand, or restructure anything. I also offer update packages if you want me to add new skills or refine existing ones.
Claude Cowork by Anthropic — a conversational interface where your writing system lives. Think of it like a chat app, but your system gives it memory, skills, and knowledge of your business. No coding, no terminal. You just talk to it.
That’s completely fine. You don’t need 50 blog posts to analyze. Share writers, creators, or brands whose tone you admire, and Alex develops a voice profile based on that direction. The system helps you find your voice, not just capture one you already have.
Most systems include multiple skills — LinkedIn posts, newsletters, email sequences, whatever you publish. The price scales with complexity: a single-channel system (just LinkedIn, for example) is on the lower end. Multi-channel with advanced workflows is on the higher end. You get a clear scope and quote before paying anything.
You get a custom onboarding video walking through your entire system, plus 7 days of email support after delivery for any setup questions. After that, update packages and strategy sessions are available if you want to evolve your system — new skills, voice refinements, expanded workflows. But the system is fully functional from day one.
The Co-Writer System is a plugin marketplace — you get the tools and build your own system. Custom Systems means I build it for you. Same methodology, same quality, done-for-you. If you want to learn and build, get the Co-Writer System. If you want it built and ready to use, apply here.
Get Started

Ready to 10x your content output?

Stop starting from scratch. Get a writing system built around your voice, your business, and your goals.

Build Your System →