$ cd ../work // back
AI GROWTH
// case_003

VibeSell

A Chrome extension that, when you click “Engage” on a Reddit post, returns three human, product-personalized reply drafts — you copy, edit and post.

vibesell.atlasinvencivel.pt/ A
ROLE
Strategy · Eng · Product
YEAR
2026
STACK
JavaScript · vanilla HTML/CSS/JS · Node.js/Express (REST API) · Anthropic API (Claude) · magic-link auth · Stripe (SaaS) · Vercel
STATUS
● pre-launch
// THE_CHALLENGE.md

Reddit is flooded with AI-generated comments — obvious slop that no one respects and communities penalize. Yet it's still one of the highest purchase-intent places online. The challenge: help product owners take part genuinely and at scale, without slipping into spam — with a person always deciding before publishing.

// THE_APPROACH.md

The principle is the opposite of slop: the tool suggests, the human decides. Nothing is posted automatically. An “Engage” button on threads generates three short, relevant drafts (1–3 sentences), personalized to the product and to a chosen directness level — you copy, tweak and post.

The intelligence comes from the Anthropic API (Claude). Underneath, a lean architecture: static site, Express backend with a REST API, magic-link login and Stripe payments for the SaaS model — all on Vercel, with continuous deployment and per-plan usage limits.

// THE_SOLUTION.build

A Chrome drafting extension inside Reddit, a marketing site and an account area with magic-link login, plan dashboard and a usage meter. SaaS monetization with Stripe (plans and daily limits); the paid plan unlocks auto-discovery, voice match and direct mode.

vibesell.atlasinvencivel.pt/
vibesell.atlasinvencivel.pt/
// RESULTS.out

The proof came from the real world: I used the extension itself to promote my How To Invest project on Reddit. Even with a first MVP, that channel brought over 150 users and around 200 sessions (GA4) — one of the project's biggest traffic sources. That's VibeSell's core argument: genuine participation, with human control, drives real visits without burning the brand. The product is in pre-launch, with the full SaaS stack (extension, auth, payments).

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