The CMO Guy Operating System Skill · free
The CMO Guy Operating System. Yours, free.
The usable version of the operating system behind my client work, packaged as a free AI skill. Work through the plays, interrogate the numbers and improve the output.
The playbook teaches you the system. The skill lets you use it. What it cannot do is deliver the finished commercial read on your business. That is the human layer.
Use the OS skill Free
Bring a real growth question.
No numbers to gather, just ask. It gives you the framework and the bands the same way the work starts. Drop your email to ask: six questions free, then add it to your own Claude for unlimited.
Run your numbers Free · in your browser
Have your figures handy? Get the bands on your own data.
Enter a period's numbers and it computes your operating metrics and the band each one sits in, the same read the cockpit does. Nothing is sent or stored, the math runs in your browser.
Keep it in your own Claude
Want it unlimited? Add the skill to your AI.
It then runs on your own Claude, so use it as much as you like. About two minutes, no coding.
Download the skill (a small zip). Download it here ↓
In Claude, open Settings → Capabilities and turn on "Code execution and file creation" (this lets the calculator run).
Go to Customize → Skills, click "+" then "Create skill", choose "Upload a skill", and pick the zip.
Toggle it on. Done, it's on in all your chats and Claude uses it automatically. To run numbers, just tell Claude your figures ("net sales 100k, ad spend 33k, COGS 22k…") and it returns the banded read.
Works on Claude Free, Pro and Max. It's a global on/off in your settings, switch it off any time. Only install skills you trust; this one's mine, and you can open it and read every line.
The honest line
What it does, and where it stops.
It's deliberately a tool, not a verdict.
What the skill does
Gives you the frameworks: read top-down, steer on contribution margin.
Tells you the operating bands every number should sit in.
Computes your numbers and shows where the leak usually hides.
What it can't do
Tell you which number on your P&L is actually lying to you.
See your full picture: cohorts, cash, what you've already tried.
Make the call. That read is the human. That's the audit.
When you want the real read on your brand, that's a free 15-minute call, then a paid audit you keep either way. Book the call →