Build a Marketing System in Claude Cowork

What you're building and why this works

If you already use regular Claude chat, you've felt the ceiling. You can prompt for great copy. You can ideate. You can edit. But the moment you close the tab, every bit of context evaporates. Claude has no idea who you are tomorrow morning.

Claude Cowork is the version of Claude that fixes this. It works inside folders on your machine, plugs into your other tools through Connectors, runs tasks on a schedule, and can be extended with reusable Skills. It's still Claude. It just stops forgetting.

This tutorial walks through one specific use case end to end: a working marketing capture system. By the time you're done, you'll have:

• A branded lead magnet that captures emails from your audience
• A 3-email welcome sequence that nurtures every new subscriber on autopilot
• A scheduled task that drafts a daily newsletter for you to review and send
• A reusable Skill for each piece so you never rebuild from scratch

The mental model that holds it all together is simple. Skills and Plugins teach Claude what to do. Connectors give it live data to do it with. Scheduled Tasks run the whole thing on a timer.

Build the Skill once. Point it at the data. Schedule it. Repeat for every workflow in your business that you do more than twice.

This article assumes you already use Claude chat and have an active Claude Pro subscription. The Cowork features below aren't available on the free tier.

The four Cowork features that matter

Cowork has a lot of features. Four of them carry this entire workflow. Learn these four and you can build everything in this article.

Anthropic ships a Marketing Plugin out of the box with Skills for brand voice, campaign planning, competitive briefs, and content creation. Browse to it inside Customize, click the plus icon, and the whole bundle installs in one click. That's the fastest way to see Plugins and Skills working together before you build your own.

The order of operations, every single time, is the same:

1. Build or install a Skill that does the work
2. Connect the data the Skill needs to do it well
3. Schedule the Skill to run on its own

Skip step two and your Skill produces generic output. Skip step three and you're still doing the work manually. Skip step one and you're just prompting like before, with extra steps.

Set up your knowledge base first

This is the single highest-value move in the system, and most users skip it.

Before you build a Skill or schedule anything, set up a knowledge base folder. Cowork works inside folders. When you point it at one, every file inside becomes available context for every prompt in that conversation. No more pasting your bio into every chat. No more re-explaining who your customer is.

Create a folder somewhere on your machine called something like marketing-base. Inside it, add these subfolders and fill each with a short, plain-text document:

• about-you: who you are, what you do, why you started
• company: what your business does, what makes it different
• offers: every product or service you sell, prices, deliverables
• icp: who your ideal customer is, where they hang out, their budget, what frustrates them
• results: case studies, testimonials, hard numbers from past work
• goals: what you're trying to grow this quarter
• brand: voice notes, hex codes, any visual guidelines

The documents don't need to be long. One page each is plenty. You're writing the briefing you'd hand a new marketing hire on day one. Consistency beats depth.

Once this folder exists, point Cowork at it whenever you open a marketing conversation. From that moment on, every prompt you send already has your full context baked in. A request like "give me five lead magnet ideas for my best offer" returns specific, on-brand suggestions instead of the generic shopping list most users get.

Build the lead magnet

A lead magnet is a free resource someone gets in exchange for their email. A checklist, a one-pager, a template, a short guide. Any format works. The job of the lead magnet is to capture the email. The job of the emails that follow is to turn that lead into a customer.

The most common mistake users make at this stage is overthinking it. A finished lead magnet that's 80% as good as your dream version, published today, beats a perfect one that never ships. Pick something useful, write it, get it live. You can always make another next week.

A reliable rule for picking the topic: take 20% of what you sell and give it away. If you sell a $5,000 SEO audit, your lead magnet is a self-audit checklist. If you sell ghostwriting, it's a short guide on writing your first post. The free version makes the paid version more obvious to the right person, not less.

Step 1: Ask for ideas, not output

Don't ask Claude to write the lead magnet on the first prompt. Ask for options first. Open a new conversation with your knowledge base folder selected, then run this:

Because your knowledge base is attached, Cowork pulls who your customer is, what their frustration is, and what your paid offers do. You get five tailored ideas instead of a generic list.

Step 2: Pick one. Move on.

Read the list. Pick the one that makes you say "yeah, my customer actually wants that." Trust your gut. You know your audience better than the model does.

Step 3: Generate the full content

Now ask for the document itself.

You'll have a working first draft in under a minute. It will be roughly 80% of the way there.

Step 4: Edit, don't restart

This is where most users go wrong. They get a draft they don't love and immediately start a new conversation with a new prompt. Don't. Edit the draft you have. Ask Cowork to fix specific sections one at a time:

Iterate three or four times. Each pass tightens it. When you're happy, ask Cowork to export it as a branded PDF. If you've set your brand colors in the knowledge base (a brand.md file with your hex codes works fine), it'll apply them on export.

You now have a publishable lead magnet. Upload it to your email capture platform, write a simple landing page, and the front of the system is live.

Turn the lead magnet flow into a reusable Skill

Here's the part most users miss. You just figured out a working lead-magnet workflow. Don't make yourself remember the prompts next time. Bottle the whole flow into a Skill so it's a single slash command from here on.

Open Customize, click Skills, then Create new skill. You have two ways to do this:

• Manual. Write the Skill instructions yourself in the form. Faster if you know exactly what you want.
• Conversational. Use the skill-creator Skill that ships with Cowork. It interviews you and writes the Skill file for you.

The conversational route is faster for most users. Open the skill-creator and tell it what you want:

The skill-creator asks follow-up questions, drafts the Skill, and saves it to your Skills directory. Next time you need a lead magnet, you type /lead-magnet and the whole flow runs. No retyping the prompts. No re-explaining your brand.

This is where Cowork compounds. Every workflow you save as a Skill becomes a one-click tool. After a month of doing this, you've built yourself a toolkit nobody else has, customized to your business, callable from inside every conversation.

The 3-email welcome sequence

Capturing the email is half the system. The other half is what happens after. Most users build a lead magnet, get a few hundred signups, and then never email those people again. The lead goes cold. The relationship dies before it starts.

A welcome sequence fixes this. It runs the moment someone downloads your lead magnet and warms them up over the following days with zero work from you.

The structure that works for most service businesses is three emails over four days:

Three emails. Four days. Nothing more. Resist the urge to bolt on a fourth. People are busy. The point isn't to bombard them. The point is to reintroduce yourself enough times that they remember you when they're actually ready to buy.

Here are the prompts to use for each one. Run these in Cowork with your knowledge base attached.

Email 1: Welcome and Delivery

Email 2: Pure Value

Email 3: Soft Introduction

Once these three are written, paste them into your email platform as an automated sequence triggered by the lead magnet download. Set the delay between emails to two days. You're done.

After the sequence ends, drop unconverted subscribers into your general newsletter list. Send them something useful once or twice a week. The ones who convert later are usually the ones who needed three months of useful emails to trust you, not three.

Automate the writing with Scheduled Tasks

You now have a working capture-and-nurture system. The last layer is the timer.

Cowork's Scheduled Tasks let you run any Skill (or any prompt) on a recurring basis. A 9am task that drafts your morning marketing brief. A weekly task that summarizes your inbox. A daily task that drafts tomorrow's social posts using this week's wins.

Here's a concrete one. Set up a daily task that drafts your newsletter for you. You review and send.

Open Scheduled Tasks, click New Task, and fill it out:

That's it. Every day at 12:30, Cowork drafts a newsletter and saves it to a conversation. You open it, edit anything that doesn't sound like you, and send it through your email platform.

The critical distinction: the task drafts. It does not send. You still have a human eye on every email that leaves the building. This is the right setup for almost every business. The day Claude sends emails directly on your behalf without you reading them is the day a hallucinated claim ends up in front of a paying customer.

For Gmail specifically, this is a sensible default:

• Read tools (read inbox, search threads, list labels): Always allow
• Write tools (draft, send, delete): Needs approval

This way Cowork can pull context from your inbox without you clicking approve every time, but it can't send anything on your behalf without you saying yes.

What you actually built

Step back for a second. Look at what's now running in your business:

Most business owners spend months stitching together different tools to do a fraction of this. One SaaS for lead capture, a second for email automation, a third for newsletter writing, a fourth for scheduling. You did it inside one app, in one sitting, on one subscription.

The next move is to extend the system. Some directions worth your time:

• Add a competitor-monitoring Skill that pulls competitor pricing or content into your weekly brief
• Add a content-repurposing Skill that turns one long video into five short posts using your brand voice
• Connect your CRM so the welcome sequence Skill knows whether a subscriber is also a paying customer (and writes accordingly)
• Add a weekly review task that summarizes which emails got opened and suggests next week's topics

Each addition compounds. Every new Skill is callable from inside every other Skill. Every new Connector adds context to everything you build going forward.

Further reading

The mental model in this tutorial (Plugins and Skills, then Live Data, then Schedule Out) is adapted from a training by Shaz Mathew at AttractAI. His video, "How to Use Cowork for Marketing," is the cleanest one-take walkthrough of these concepts we've seen, with worked examples on Gumroad and Kit.com.

For more on building robust Skills, look up Anthropic's own skill-creator documentation. It walks through the file structure of a SKILL.md and the supporting files that make a Skill reliable enough to call from anywhere.