The client you inherit
You're in the copy studio. What you're doing this lesson: inherit a brand whose voice lives in three published pages, not a brand book, and learn how to measure that voice so AI drafts can be checked. Demo code, if it appears later, is optional — skip it if you want.
A client has a voice you can hear. Short sentences. No shouting. Specs before swagger. Before any splitting or counting: that's the job this hour — keep the next twelve variants sounding like them, not like the internet's average backpack.
Monday. You've just picked up Windrow — a backpack brand whose previous copywriter left the brand book in her head. What you have instead: three pieces of live, published, client-approved copy. A product page, a welcome email, an about page. And a brief: the Drift 28 relaunches next Thursday, and the client wants "the usual voice, but everywhere" — subject lines, landing hero, social. Call it a dozen variants.
You'll draft with a model. Everyone does — Muck Rack's 2026 survey has 76% of PR professionals using generative AI, and the drafting itself is the least defensible hour of your week to spend typing. The question that decides whether you keep this client is different: when twelve variants come back, how do you know they sound like Windrow?
"Sounds like them" is not transferable
Ask three people whether a line sounds like Windrow and you'll get three vibes. Vibes don't survive handoff — to a model, to a subcontractor, to yourself at 11pm. What survives handoff is something you can point at.
One paragraph of real Windrow copy tells you something no brand book bothers to write down: the average sentence is seven words long. Not "punchy." Not "confident but warm." Seven words. A script can check seven. No script can check punchy.
Read one paragraph of live Windrow copy like a copywriter:
The Drift 28 weighs 890 grams. That's not a typo. We cut the frame, not the warranty. Every seam is taped and every zip is sealed. It fits under the seat in front of you.
Five sentences. About seven words each. "That's not a typo" — a contraction, and a dry aside. Zero exclamation points while announcing a flagship product. "You," twice. Spec first, swagger second. That's a voice with opinions. Your job this lesson is to get those opinions out of your head and onto a list a script can check.
Where this lesson goes
Next you'll measure those facts — sentence length, exclamations, contractions — across all three samples, derive rules from the measurements (not from your taste), and assemble a versioned voice pack (the short list of measurable rules a script can check) that names its own evidence. Every batch you generate for the rest of this chapter gets checked against it.
One warning before you start: the rules must come from the samples. The moment you write a rule the samples don't support, you're not capturing Windrow's voice — you're overwriting it with yours. That temptation gets its own drill in step 4.