How to install Cowork plugins for marketing teams

Open Claude Cowork. Click Customize in the left sidebar. Browse plugins. The marketing pack installs eight skills and connects your stack in under 90 seconds. Setup ends there. Most marketers using Cowork today never touch it.

A plugin is a bundle. Skills, connectors, and sub-agents in one file. One click replaces the four-step wire job most operators have been doing by hand. The work in this post is to install the marketing pack, connect two tools you already use, and run one real workflow in the next 40 minutes.

TL;DR

Cowork plugins are pre-built bundles of skills, connectors, and sub-agents. The marketing pack ships eight named skills including content drafting, SEO audits, performance reports, and email sequences. Install through Customize then Browse plugins. Connect Slack and your analytics source first. Run seo-audit on a landing page as your first end-to-end workflow.

Key Takeaways

A plugin is a department. A skill is a standard operating procedure. A capability is one atomic task. Map plugins to marketing functions, skills to workflows, capabilities to steps.
Cowork loads skill frontmatter at session start and pulls bodies plus references on demand. This progressive load is why bundled plugins beat single giant prompts.
Plugins ship on Pro, Max, Team, and Enterprise plans. No separate billing.
A plugin packages skills plus connectors plus sub-agents into a single install.
The marketing pack covers content drafting, SEO audits, brand review, performance reports, email sequences, campaign planning, and competitive briefs.
Connectors route through Anthropic’s cloud, not your local network. Behind-the-firewall MCP servers need extra setup.
Enterprise admins control which plugins install or disable local MCP entirely. Check with IT before sharing a custom plugin across the team.
Plugin Create is the meta-plugin for building your own bundle when the marketing pack doesn’t fit your stack.

What a Cowork plugin contains

A plugin has three pieces. Skills are specialized instructions Claude follows when you call them, like “/seo-audit” or “/campaign-plan”. Connectors are auth-wrapped MCP servers. They give Claude reach into external tools like Ahrefs, Klaviyo, or your Slack workspace. Sub-agents are specialist personas the main thread delegates to, useful for long jobs where you want a dedicated researcher or reviewer running in parallel.

Bundle these three together and you get a setup reproducible across the team. Without the plugin, an operator pastes prompts, ports API keys by hand, wires MCP servers manually, and hopes the colleague next to them did the same thing. With the plugin, the install is one click. Every chat in Cowork then calls the same skills against the same connectors.

The catalog covers more than marketing. Sales, finance, legal, HR, engineering, design, operations, and data analysis each have their own pack. Anthropic publishes the source for every official plugin at github.com/anthropics/knowledge-work-plugins, so you read what’s inside before installing.

Action item: Open Cowork right now, click Customize in the left sidebar, and browse the catalog. Read what’s in the marketing pack before installing. Two minutes.

Mental model: a plugin is a department

A useful frame for thinking about plugins. A plugin is a department. A skill is a standard operating procedure inside the department. A capability is one atomic task inside the SOP.

Map this to how a marketing function already works. Your demand gen team has an SOP for lead routing. Your content team has an SOP for blog production. Your brand team has an SOP for messaging review. Each SOP has steps inside it (load brand voice, draft, fact-check, score, ship).

In plugin terms, the marketing plugin is the department. seo-audit and email-sequence are SOPs. Each step inside those SOPs (pull keyword data, draft the variant, score against the rubric) is a capability.

The frame helps you organize what you build next. One plugin per function. One skill per repeating workflow. One capability per atomic step. If a plugin tries to cover three functions, split it. If a skill tries to do four jobs, decompose it.

Action item: Pick the three workflows you run most often this quarter. Write each one as a 4-to-8-step SOP on one page. Those become your future skills.

How a plugin loads (the architecture matters more than wording)

The mechanic underneath is worth knowing because it shapes how good your output gets.

When Cowork starts a session, it loads only the frontmatter from every skill in every installed plugin. Frontmatter is the name and the short description. Nothing else. Skill bodies stay dormant. Reference files stay on disk.

When you type a slash command or ask a question matching a skill description, Cowork pulls the body of the matching skill into context. Inside the body, when the skill needs a reference (brand voice doc, ICP profile, past-campaign examples), it pulls the file at the moment it’s needed.

This progressive load matters because context windows are finite. Most production Claude models work with 200,000 tokens. The top model works with 1 million. Stuffing every reference upfront blows the budget on instructions and examples the AI does not need for the current task. Output quality drops. Hallucination rate rises.

A well-bundled plugin with clean descriptions, modular skills, and references loading on demand produces dramatically better output than the same content pasted into one giant prompt. Architecture is the product. Word choice sits downstream.

There’s a quieter reason this matters. Pasting a prompt into a chat gives you the same instructions without the loading discipline. The plugin enforces the architecture.

Install the marketing pack

The flow has four steps.

Open the Claude Desktop app and switch to the Cowork tab.
Click Customize in the left sidebar. This is the one place where plugins, skills, and connectors live.
Click Browse plugins to see the full catalog.
Click Install on the marketing pack.

Plugins you add yourself save locally to your machine. Nothing leaves your computer at install time. The first time you call a skill needing a connector, Cowork prompts you to authenticate the underlying service.

If you’re on a Team or Enterprise plan, the flow has one wrinkle. Your admin will likely have distributed plugins through an org marketplace. Those plugins show up alongside the public ones in the catalog. You install them yourself, but you don’t edit them. Some plugins are required by your admin and won’t be uninstalled. This keeps tooling consistent across a marketing function so two operators don’t end up using different versions of the same workflow.

One constraint to know upfront. Connectors reach external services through Anthropic’s cloud, not your local network. If a tool you need lives on a private MCP server behind your firewall, you’ll need to expose the server to Anthropic’s IP ranges or build a custom connector. The public marketing connectors (Slack, Notion, Klaviyo, and so on) work out of the box because the services themselves are public SaaS.

The eight marketing skills you get

The marketing pack ships eight named skills. Each one does a specific job. You call them with ”/” or the ”+” button in any chat.

content-creation drafts marketing content across channels with channel-specific formatting and SEO recommendations. Use this for a full blog or landing page from scratch.
draft-content is the lighter cousin. Single-channel drafts for blog, social, email, landing page, press release, or case study. Use this for one-off pieces where you already have the angle.
brand-review checks content against your brand voice, style guide, and messaging pillars. Flags deviations by severity with before/after fixes. Use this as a pre-publish gate.
performance-report builds a report with key metrics, trend analysis, wins and misses, and prioritized optimization recommendations. Use this for weekly, monthly, or quarterly stakeholder summaries.
seo-audit runs keyword research, on-page analysis, content gaps, technical checks, and competitor comparison. Output is a prioritized action plan split into quick wins and strategic investments.
email-sequence designs multi-email sequences with full content, timing, branching logic, exit conditions, and performance benchmarks. Use this for onboarding, nurture, re-engagement, win-back, or launch flows.
campaign-plan generates a full campaign brief with objectives, audience, messaging, channel strategy, content calendar, and success metrics. Use this for a week-by-week launch plan with dependencies.
competitive-brief researches competitors and produces a positioning and messaging comparison with content gaps, opportunities, and threats. Use this for sales battlecards or quarterly competitive reviews.

My read: the highest-value two for most teams are seo-audit and performance-report. Both turn a job taking a marketer 2 to 4 hours into a 15-minute review of a Claude-drafted output. Start there.

Wire the connectors making each skill sharper

A skill grows more useful when it reads your real data instead of asking you to paste it in. The current Cowork plugin marketplace exposes eight marketing connectors worth wiring.

Connector	Pairs with	What it unlocks
Ahrefs	seo-audit, competitive-brief	Live keyword data, backlink profile, competitor pages
Amplitude	performance-report	Product analytics, funnel cohorts, retention curves
Canva	content-creation, campaign-plan	Brand-templated visuals attached to drafts
Figma	content-creation, campaign-plan	Design files referenced in content briefs
Klaviyo	email-sequence, performance-report	Real list segments, send history, revenue per email
Notion	campaign-plan, content-creation	Brief docs, content calendar, knowledge base
Slack	performance-report, campaign-plan	Team channels for delivery, status pings
Supermetrics	performance-report, seo-audit	Multi-source paid plus organic data pulled into one report

You don’t need all eight on day one. Pick the two paired with the skill you run first. If your first skill is seo-audit, Ahrefs plus Supermetrics is the pair to wire. If it’s email-sequence, Klaviyo alone is enough.

The auth flow runs in your browser. You click Connect, you sign in to the service, you approve the scopes. The connector caches tokens locally and refreshes them through Anthropic’s cloud. Tokens never get pasted into chat.

Action item: Pick one skill from the eight. Wire the connector pairing with it. Time-box this to 10 minutes. If you cannot auth a connector in 10 minutes, skip it and use the skill without it for now.

Your first 40-minute workflow

Pick seo-audit. Here’s why. The input is one URL. The output is concrete and scannable. The work either saves you a Tuesday afternoon or it doesn’t, and you’ll know in 15 minutes.

The full setup looks like this.

Minute 0 to 5. Install the marketing pack from Customize then Browse plugins.

Minute 5 to 15. Connect Ahrefs and your analytics source. If you don’t have an Ahrefs seat, skip the connector. The skill still runs on public data and on-page analysis.

Minute 15 to 20. In a new Cowork chat, type “/seo-audit” or hit ”+” and pick it from the list. Paste the URL of the landing page you want audited. Pick one mattering most, like your highest-value pricing page or your top-converting blog post. The skill asks you for target keywords if none get inferred. Give it 3 to 5.

Minute 20 to 35. The skill runs. It pulls page content, checks technical SEO basics, compares against the top-ranking pages for your target keywords, and flags content gaps. Output lands in chat with a prioritized list split into quick wins (do this week) and strategic investments (do this quarter).

Minute 35 to 40. Read the output. Pick one quick win. Ship it before end of day.

The point isn’t to fall in love with the skill. It’s to run one end-to-end loop so you know how plugins work in your stack. After this one workflow you’ll have a real sense of which other seven skills are worth your next 40 minutes.

Action item: Block 40 minutes on your calendar this week. Run seo-audit on your highest-traffic landing page. Ship one quick win from the output before the calendar block ends.

Final Takeaways

Cowork plugins close the gap between “I opened Claude” and “I have a working marketing setup with my real tools wired in.” The bundle is the thing mattering most. Skills, connectors, and sub-agents in one install means a teammate next to you reproduces your workflow without a 45-minute call.

The marketing pack is the right starting point for most marketers. Eight named skills covering the work you already do. Eight connectors covering the tools you already pay for. No separate billing on Pro, Max, Team, or Enterprise.

Connectors route through Anthropic’s cloud. If your stack lives behind a firewall, custom-connector setup is the next problem to solve. Worth doing if the tool is core to your day, worth skipping if it isn’t.

The 40-minute first workflow matters more than picking the perfect first skill. Run something end-to-end and the rest of the catalog stops being abstract. seo-audit is my pick for the first run because the output is concrete. Yours might be email-sequence or performance-report. Pick one and ship.

Plugin Create exists when the marketing pack doesn’t fit your stack. Custom bundles are how you graduate from running someone else’s setup to running your own opinionated workflow. Save the custom build for a second post and the second month.