From an idea to a full SaaS in 11 days — 130+ hours, 343 commits, 894 tests. Here’s how it happened

I was working on a client project, and the feedback process was honestly a nightmare — WhatsApp messages, screenshots, voice notes… then I’d sit for hours filtering everything, figuring out what’s a bug, what’s a feature request, what’s noise.

So I asked myself:
Why doesn’t the client just open their website after delivery, click on what they want to change, record a voice note or type a message, and send it to me in a structured way?

Sure, tools like this exist.
But I’m already sending all this to a coding agent anyway… so why not take it further?

That’s where the second part of the idea came in:

Image + voice + text + console logs + the exact UI element the client is talking about → all packaged and sent to AI → AI generates a clean prompt → I send it to Antigravity / Codex / Claude / whatever.

And that’s how Tellback was born.

How I actually built it (using Vibe Engineering, not just Vibe Coding)

1. The “Project Brain”
I always need a place that acts like the CTO during product development — something that knows every detail.
I used Claude before, then Hermes Agent became my default.
But for this project, I went all‑in on ChatGPT as the brain.

2. Shaping the idea
I explained the product to ChatGPT, then asked it to interview me — question by question — until the full vision was clear.

3. The project.md file
This file becomes the product’s reference point.
All answers, all decisions, all details.
At this stage, I also choose the infrastructure stack — I went fully Google Cloud for reasons I’ll share later.

4. Turning project.md into Specs
AI coding only works when the AI has exact specs.
No guessing.
Spec‑driven development.
I used Speckit from GitHub and asked ChatGPT to generate the Speckit files based on the project.md.

5. The loop
Brain writes prompts → coding agent executes → I review → send back to the brain → repeat.
Stage by stage until the product is done.

It’s not “easy,” but that’s the core workflow.

Tellback .IO is live

Anyone can sign up now — there’s a free plan for a limited time.
I’d love to hear your honest feedback.

And of course… building is only half the game

Marketing is next.
I’m building a Hermes‑powered agent that will handle:

• Email marketing
• LinkedIn, Facebook, Reddit outreach
• SEO + LLM‑optimized content
• And more

I’ll share all of that soon.