Vibe Code Your
Marketing Funnel

Here's what vibe coding a funnel actually looks like. The example is the lead magnet I built for Bridesmaid, the wedding-planning startup Christina and I are building – but the moves are general. The first prompt wasn't “build me a landing page.” It was: review our content context in the docs folder and suggest ten lead-magnet ideas that would be perfect for our audience.

The agent read the docs and came back with ten. Notice who chose: I asked Christina which one she wanted, and she was most drawn to “the first week after yes.” That's the cheapest, most reliable way to pick a lead magnet – you ask the customer. Observe what they already ask you for. Ask them on social. Or do what we did: have the agent propose a few, and let the person closest to the customer point at the one that matters.

Then it built the page. The headline, the seven-day sample, the pricing line, the founder note – the agent didn't ask me who the customer was or what we charge, because all of that was already written down. The persona it wrote to is the first-time bride who has no starting line: the woman who gets congratulated by everyone and handed step one by no one. That sentence wasn't my prompt – it was sitting in the story doc, and the agent pulled it. The seven-day trial in the call-to-action came from the pricing ladder in the same folder. The way it spells out “Maid of Honor” in full instead of an abbreviation came from a voice rule. None of it was re-explained.

It wasn't hands-off. The sample bride the agent invented to make the page concrete – an autumn wedding in the Bavarian countryside – gave me one moment of pause: I wasn't sure I wanted the example to lean that German. I decided it was fine and moved on. That's the actual shape of the work now. The agent drafts from context; you direct from taste. The role isn't copywriter or page-builder anymore. It's editor.

If you want the framework underneath the page it built, the Growth Codex chapter on landing pages is the one the docs encode – and the Builder Codex walks through building one in code.

This is the part that the old WordPress-plus-form-tool world could never do, and it's the quiet reason the whole thing works. Because the funnel and the product are now the same codebase on the same stack, you don't bolt a funnel onto the product. You grow it out of the same tree.

The lead-magnet sign-up is the product's free-trial sign-up. There is no second form, no “now create an account to continue,” no lead sitting in one database while the user sits in another. It's one record from the first click. The thing I used to lose – attribution and continuity from a cold lead to a real user – isn't something I have to engineer anymore, because there's no gap left to bridge.

It also means the easiest conversion in the funnel is the one that used to be the hardest. Turning a lead into a trial user isn't a separate campaign with its own drop-off – it's the same sign-up, captured once. The shared login and sign-up that the product already uses is the front door to the lead magnet too.

I want to be honest about a decision here, because it's the one most people get backwards. A plain PDF was a real option, and I considered it seriously. Simplicity is a feature. It is better to ship a simple lead magnet your audience instantly understands than a clever one you never finish. If the interactive version had threatened to stall the whole thing, the PDF would have been the right call.

We went interactive for one reason: it lives right next to the product. That's the lead magnet above – the six questions answered, carried straight into the planning chat, the agent already working the bride's wedding from her own inputs. A lead magnet that sits inside the same experience the customer is about to pay for reads as higher value, and it pulls the lead one step deeper in instead of leaving them with a file in their downloads folder. The point isn't that PDFs are dead. It's that the closer the magnet sits to the product, the shorter the trip from interested to invested.

And there's a backstop that keeps the interactive choice honest. We still email a plain, static version of the playbook the moment someone registers – because I can't assume every person finishes the interactive flow to get the value. That static email is the follow-up sequence's first beat, and it's written from the same context as everything else, so it sounds like the brand the moment it lands. The Growth Codex chapter on funnel messages is the framework underneath that follow-up.

Here's the part I didn't expect. Building the funnel didn't just consume the strategy and story docs – it exposed where they'd gone stale, and we fixed all three the same afternoon. The headline typography on the page had drifted from what the content brand had locked, so the two had quietly diverged; we reconciled them. A line from the lead magnet was getting recycled straight into the promo captions, so we added a voice rule that bans reusing the asset's own words in the copy that sells it. And the launch posts surfaced that there was no caption-length guidance at all, so we wrote one.

That's the loop worth keeping. The funnel is built from the strategy and content docs – and the act of building it makes those docs sharper, so the next surface you compose starts from better context than the last. It's the same operating idea behind treating the codebase as the company's brain, now pointed at the work your customers actually see.

Which is the real argument for not splitting your company's brain in two. The moment your marketing lives in one codebase and your product in another, neither side knows what the other knows – and you spend your days carrying context back and forth by hand. Keep them in one repo and there's a single brain: the strategy, the story and the funnel all composed by the same agent, each build making the next one sharper. Marketing and product stop being two things to keep in sync and start being one system that compounds.

Your strategy is in the repo. Your story is in the repo. The funnel is just the third thing the same agent can build from them – and the first one your customers ever touch.

Cheers,

Ben