Vibe Coding with a planning assistant to build with clarity
Most AI app builders jump straight into building. That feels fast until your app gets messy, inconsistent, and nothing like what you imagined. Today, we’re introducing Spec Coding in Capacity. Instead of building immediately, Capacity now lets you define your app first with the help of an AI co-founder that asks the right questions before any code is generated. More structure upfront. Far less refactoring later. Much better results.
Hey Product Hunt 👋
Samuel here, maker of Capacity.
We love vibe coding it’s fun and incredibly fast.
But after building a lot of real apps with AI, we kept running into the same problem:
AI builds confidently, even when the idea isn’t clear.
Humans ask questions.
AI doesn’t, it guesses.
So we built Spec Coding.
Before any code is written, an AI co-founder helps you define:
-what you’re building
-who it’s for
-what matters
-and what doesn’t
It slows down the first minute…
and saves hours later.
Would love your feedback especially if you’ve ever rebuilt the same AI app three times 😄
Happy to answer any questions!
About Spec Coding by Capacity on Product Hunt
“Vibe Coding with a planning assistant to build with clarity”
Spec Coding by Capacity launched on Product Hunt on January 8th, 2026 and earned 326 upvotes and 42 comments, earning #3 Product of the Day. Most AI app builders jump straight into building. That feels fast until your app gets messy, inconsistent, and nothing like what you imagined. Today, we’re introducing Spec Coding in Capacity. Instead of building immediately, Capacity now lets you define your app first with the help of an AI co-founder that asks the right questions before any code is generated. More structure upfront. Far less refactoring later. Much better results.
On the analytics side, Spec Coding by Capacity competes within Design Tools, Prototyping and Developer Tools — topics that collectively have 842k followers on Product Hunt. The dashboard above tracks how Spec Coding by Capacity performed against the three products that launched closest to it on the same day.
Who hunted Spec Coding by Capacity?
Spec Coding by Capacity was hunted by Samuel Rondot. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Spec Coding by Capacity including community comment highlights and product details, visit the product overview.
Samuel Rondot