Last week I let Claude Cowork run a competitive analysis on Stilnote, a product I build myself.

It took 14 minutes. I got back three angles of attack I hadn’t seen on my own.

⚡ What a plugin actually is

A plugin in Claude Cowork is a package of skills and commands you install once and use again and again. Think of it as a colleague who already knows how you write a PRD, and who doesn’t need everything explained from scratch every time.

Anthropic has made one for product managers. It’s called Product Management.

You get /write-spec to go from problem statement to structured PRD with user stories and success metrics. /roadmap-update for Now/Next/Later or OKR-aligned roadmaps. /stakeholder-update for tailored updates to leadership, engineering or customers. /synthesize-research to turn messy interview notes into structured insight. /competitive-brief for competitive analysis. /metrics-review to review product metrics.

Most product managers still haven’t actually tried it.

🎯 Where it gets interesting

I mainly use the competitive brief and spec tools on Stilnote and other products. For both product strategy and go-to-market.

Example: I have a hunch about who the real competitor is. I let Claude write the brief without my assumptions. Then I hold the two up against each other and look for where I disagree.

Same principle with the spec tool. I dictate my own idea of how a feature should be built. Then I let Claude write it from the problem statement alone. The differences tell me where my thinking is weak.

👉 It gets more valuable the more of your own tools you connect via MCP. Project tracker, analytics, user feedback.

💡 One small extra story

Podimo’s CTO posted a slide on LinkedIn this week. In early 2025, roughly 80% of their code was written by hand. In 2026 they’re aiming for 20% by hand, 70% AI-assisted, 10% fully autonomous. They built a new chat interface in three days.

When build time drops like that, the expensive part moves. Away from getting things built, towards knowing what’s worth building. That’s exactly the judgment a plugin like this helps you sharpen.

Podimo’s slide says “the shift already happened.” For the developers, maybe. For product people, it’s just getting started.

Best, Martin