Day 5 opens with a warning: zero sales from yesterday to today. After days of stacking feature on top of feature into Hacker AI — the vertical email marketing agent that runs on top of ActiveCampaign for Brazilian info-product sellers — Guilherme decides the problem isn't a lack of features, it's a lack of conversion. With 142 users signed up, only 24 had connected ActiveCampaign, and only 3 were getting sales. The goal for the day shifts from "build more" to "optimize what already exists": reduce onboarding friction and raise the completion rate.
The turn is made explicit in something Guilherme says himself: instead of stacking features, it was time to do fewer things and do those things really well — he calls it a recurring temptation of vibe coding, the pull to keep shipping without measuring adoption. In practice, that becomes a new onboarding flow: the person pastes the link to their own offer, the system automatically scrapes the page, generates a sample sales email based on that context, only then asks for sign-up to see the result, and from there decides whether to connect ActiveCampaign or skip straight to the dashboard.
The day's technical breakthrough was quiet but structural: after hitting a YouTube bot-detection block, the team built their own worker with a residential IP to extract transcripts and content from any YouTube video without relying on third-party APIs. That unblocks four fronts at once that depended on the same piece: Sentinel (the AI-market radar that generates a daily 7am brief on WhatsApp), monitoring of entire channels with automatic classification between videos, lives, and shorts, and feeding the project's own knowledge base — even tested live by importing the channel of a client, Enzo Neto.
The tensest moment of the stream was trying to publish 100%-AI-generated Meta Ads, using Guilherme's own photo and copy as the creative. The first attempt failed — Instagram account not selected, expired token, empty required field — forcing the ads to be deleted and recreated several times live, with a joke about how fixing that bug felt harder than hitting the R$1 million goal. After regenerating the token, all 5 creatives went up, with an initial budget of R$100/day to bring more email managers to the platform.
The stream closes with R$1,973.93 accumulated toward the R$1 million goal, everything committed and deployed before wrapping up. The takeaway is discipline: the journey isn't about how many features show up in the changelog, it's about how many people actually finish the flow and sell through the product.